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GT2/GT2-Android/node_modules/websql/test/pouchdb-node.js

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Get new tree with state verified with current React Native on both platforms
2018-02-12 17:11:06 +00:00
'use strict';
/* jshint ignore:start */
function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
var jsExtend = require('js-extend');
var jsExtend__default = _interopDefault(jsExtend);
var debug = _interopDefault(require('debug'));
var inherits = _interopDefault(require('inherits'));
var lie = _interopDefault(require('lie'));
var pouchdbCollections = require('pouchdb-collections');
var getArguments = _interopDefault(require('argsarray'));
var events = require('events');
var scopedEval = _interopDefault(require('scope-eval'));
var pouchCollate = require('pouchdb-collate');
var pouchCollate__default = _interopDefault(pouchCollate);
var crypto = _interopDefault(require('crypto'));
var levelup = _interopDefault(require('levelup'));
var sublevel = _interopDefault(require('sublevel-pouchdb'));
var through2 = require('through2');
var vuvuzela = _interopDefault(require('vuvuzela'));
var fs = _interopDefault(require('fs'));
var path = _interopDefault(require('path'));
var LevelWriteStream = _interopDefault(require('level-write-stream'));
var Deque = _interopDefault(require('double-ended-queue'));
/* istanbul ignore next */
var PouchPromise = typeof Promise === 'function' ? Promise : lie;
// like underscore/lodash _.pick()
function pick(obj, arr) {
var res = {};
for (var i = 0, len = arr.length; i < len; i++) {
var prop = arr[i];
if (prop in obj) {
res[prop] = obj[prop];
}
}
return res;
}
function isBinaryObject(object) {
return object instanceof Buffer;
}
function cloneBinaryObject(object) {
var copy = new Buffer(object.length);
object.copy(copy);
return copy;
}
function clone(object) {
var newObject;
var i;
var len;
if (!object || typeof object !== 'object') {
return object;
}
if (Array.isArray(object)) {
newObject = [];
for (i = 0, len = object.length; i < len; i++) {
newObject[i] = clone(object[i]);
}
return newObject;
}
// special case: to avoid inconsistencies between IndexedDB
// and other backends, we automatically stringify Dates
if (object instanceof Date) {
return object.toISOString();
}
if (isBinaryObject(object)) {
return cloneBinaryObject(object);
}
newObject = {};
for (i in object) {
if (Object.prototype.hasOwnProperty.call(object, i)) {
var value = clone(object[i]);
if (typeof value !== 'undefined') {
newObject[i] = value;
}
}
}
return newObject;
}
function once(fun) {
var called = false;
return getArguments(function (args) {
/* istanbul ignore if */
if (called) {
// this is a smoke test and should never actually happen
throw new Error('once called more than once');
} else {
called = true;
fun.apply(this, args);
}
});
}
function toPromise(func) {
//create the function we will be returning
return getArguments(function (args) {
// Clone arguments
args = clone(args);
var self = this;
var tempCB =
(typeof args[args.length - 1] === 'function') ? args.pop() : false;
// if the last argument is a function, assume its a callback
var usedCB;
if (tempCB) {
// if it was a callback, create a new callback which calls it,
// but do so async so we don't trap any errors
usedCB = function (err, resp) {
process.nextTick(function () {
tempCB(err, resp);
});
};
}
var promise = new PouchPromise(function (fulfill, reject) {
var resp;
try {
var callback = once(function (err, mesg) {
if (err) {
reject(err);
} else {
fulfill(mesg);
}
});
// create a callback for this invocation
// apply the function in the orig context
args.push(callback);
resp = func.apply(self, args);
if (resp && typeof resp.then === 'function') {
fulfill(resp);
}
} catch (e) {
reject(e);
}
});
// if there is a callback, call it back
if (usedCB) {
promise.then(function (result) {
usedCB(null, result);
}, usedCB);
}
return promise;
});
}
var log = debug('pouchdb:api');
function adapterFun(name, callback) {
function logApiCall(self, name, args) {
/* istanbul ignore if */
if (log.enabled) {
var logArgs = [self._db_name, name];
for (var i = 0; i < args.length - 1; i++) {
logArgs.push(args[i]);
}
log.apply(null, logArgs);
// override the callback itself to log the response
var origCallback = args[args.length - 1];
args[args.length - 1] = function (err, res) {
var responseArgs = [self._db_name, name];
responseArgs = responseArgs.concat(
err ? ['error', err] : ['success', res]
);
log.apply(null, responseArgs);
origCallback(err, res);
};
}
}
return toPromise(getArguments(function (args) {
if (this._closed) {
return PouchPromise.reject(new Error('database is closed'));
}
if (this._destroyed) {
return PouchPromise.reject(new Error('database is destroyed'));
}
var self = this;
logApiCall(self, name, args);
if (!this.taskqueue.isReady) {
return new PouchPromise(function (fulfill, reject) {
self.taskqueue.addTask(function (failed) {
if (failed) {
reject(failed);
} else {
fulfill(self[name].apply(self, args));
}
});
});
}
return callback.apply(this, args);
}));
}
// this is essentially the "update sugar" function from daleharvey/pouchdb#1388
// the diffFun tells us what delta to apply to the doc. it either returns
// the doc, or false if it doesn't need to do an update after all
function upsert(db, docId, diffFun) {
return new PouchPromise(function (fulfill, reject) {
db.get(docId, function (err, doc) {
if (err) {
/* istanbul ignore next */
if (err.status !== 404) {
return reject(err);
}
doc = {};
}
// the user might change the _rev, so save it for posterity
var docRev = doc._rev;
var newDoc = diffFun(doc);
if (!newDoc) {
// if the diffFun returns falsy, we short-circuit as
// an optimization
return fulfill({updated: false, rev: docRev});
}
// users aren't allowed to modify these values,
// so reset them here
newDoc._id = docId;
newDoc._rev = docRev;
fulfill(tryAndPut(db, newDoc, diffFun));
});
});
}
function tryAndPut(db, doc, diffFun) {
return db.put(doc).then(function (res) {
return {
updated: true,
rev: res.rev
};
}, function (err) {
/* istanbul ignore next */
if (err.status !== 409) {
throw err;
}
return upsert(db, doc._id, diffFun);
});
}
// We fetch all leafs of the revision tree, and sort them based on tree length
// and whether they were deleted, undeleted documents with the longest revision
// tree (most edits) win
// The final sort algorithm is slightly documented in a sidebar here:
// http://guide.couchdb.org/draft/conflicts.html
function winningRev(metadata) {
var winningId;
var winningPos;
var winningDeleted;
var toVisit = metadata.rev_tree.slice();
var node;
while ((node = toVisit.pop())) {
var tree = node.ids;
var branches = tree[2];
var pos = node.pos;
if (branches.length) { // non-leaf
for (var i = 0, len = branches.length; i < len; i++) {
toVisit.push({pos: pos + 1, ids: branches[i]});
}
continue;
}
var deleted = !!tree[1].deleted;
var id = tree[0];
// sort by deleted, then pos, then id
if (!winningId || (winningDeleted !== deleted ? winningDeleted :
winningPos !== pos ? winningPos < pos : winningId < id)) {
winningId = id;
winningPos = pos;
winningDeleted = deleted;
}
}
return winningPos + '-' + winningId;
}
function getTrees(node) {
return node.ids;
}
// check if a specific revision of a doc has been deleted
// - metadata: the metadata object from the doc store
// - rev: (optional) the revision to check. defaults to winning revision
function isDeleted(metadata, rev) {
if (!rev) {
rev = winningRev(metadata);
}
var id = rev.substring(rev.indexOf('-') + 1);
var toVisit = metadata.rev_tree.map(getTrees);
var tree;
while ((tree = toVisit.pop())) {
if (tree[0] === id) {
return !!tree[1].deleted;
}
toVisit = toVisit.concat(tree[2]);
}
}
function evalFilter(input) {
return scopedEval('return ' + input + ';', {});
}
function evalView(input) {
/* jshint evil:true */
return new Function('doc', [
'var emitted = false;',
'var emit = function (a, b) {',
' emitted = true;',
'};',
'var view = ' + input + ';',
'view(doc);',
'if (emitted) {',
' return true;',
'}'
].join('\n'));
}
function parseDesignDocFunctionName(s) {
if (!s) {
return null;
}
var parts = s.split('/');
if (parts.length === 2) {
return parts;
}
if (parts.length === 1) {
return [s, s];
}
return null;
}
function normalizeDesignDocFunctionName(s) {
var normalized = parseDesignDocFunctionName(s);
return normalized ? normalized.join('/') : null;
}
// Pretty much all below can be combined into a higher order function to
// traverse revisions
// The return value from the callback will be passed as context to all
// children of that node
function traverseRevTree(revs, callback) {
var toVisit = revs.slice();
var node;
while ((node = toVisit.pop())) {
var pos = node.pos;
var tree = node.ids;
var branches = tree[2];
var newCtx =
callback(branches.length === 0, pos, tree[0], node.ctx, tree[1]);
for (var i = 0, len = branches.length; i < len; i++) {
toVisit.push({pos: pos + 1, ids: branches[i], ctx: newCtx});
}
}
}
function sortByPos(a, b) {
return a.pos - b.pos;
}
function collectLeaves(revs) {
var leaves = [];
traverseRevTree(revs, function (isLeaf, pos, id, acc, opts) {
if (isLeaf) {
leaves.push({rev: pos + "-" + id, pos: pos, opts: opts});
}
});
leaves.sort(sortByPos).reverse();
for (var i = 0, len = leaves.length; i < len; i++) {
delete leaves[i].pos;
}
return leaves;
}
// returns revs of all conflicts that is leaves such that
// 1. are not deleted and
// 2. are different than winning revision
function collectConflicts(metadata) {
var win = winningRev(metadata);
var leaves = collectLeaves(metadata.rev_tree);
var conflicts = [];
for (var i = 0, len = leaves.length; i < len; i++) {
var leaf = leaves[i];
if (leaf.rev !== win && !leaf.opts.deleted) {
conflicts.push(leaf.rev);
}
}
return conflicts;
}
inherits(PouchError, Error);
function PouchError(opts) {
Error.call(this, opts.reason);
this.status = opts.status;
this.name = opts.error;
this.message = opts.reason;
this.error = true;
}
PouchError.prototype.toString = function () {
return JSON.stringify({
status: this.status,
name: this.name,
message: this.message,
reason: this.reason
});
};
var UNAUTHORIZED = new PouchError({
status: 401,
error: 'unauthorized',
reason: "Name or password is incorrect."
});
var MISSING_BULK_DOCS = new PouchError({
status: 400,
error: 'bad_request',
reason: "Missing JSON list of 'docs'"
});
var MISSING_DOC = new PouchError({
status: 404,
error: 'not_found',
reason: 'missing'
});
var REV_CONFLICT = new PouchError({
status: 409,
error: 'conflict',
reason: 'Document update conflict'
});
var INVALID_ID = new PouchError({
status: 400,
error: 'invalid_id',
reason: '_id field must contain a string'
});
var MISSING_ID = new PouchError({
status: 412,
error: 'missing_id',
reason: '_id is required for puts'
});
var RESERVED_ID = new PouchError({
status: 400,
error: 'bad_request',
reason: 'Only reserved document ids may start with underscore.'
});
var NOT_OPEN = new PouchError({
status: 412,
error: 'precondition_failed',
reason: 'Database not open'
});
var UNKNOWN_ERROR = new PouchError({
status: 500,
error: 'unknown_error',
reason: 'Database encountered an unknown error'
});
var BAD_ARG = new PouchError({
status: 500,
error: 'badarg',
reason: 'Some query argument is invalid'
});
var INVALID_REQUEST = new PouchError({
status: 400,
error: 'invalid_request',
reason: 'Request was invalid'
});
var QUERY_PARSE_ERROR = new PouchError({
status: 400,
error: 'query_parse_error',
reason: 'Some query parameter is invalid'
});
var DOC_VALIDATION = new PouchError({
status: 500,
error: 'doc_validation',
reason: 'Bad special document member'
});
var BAD_REQUEST = new PouchError({
status: 400,
error: 'bad_request',
reason: 'Something wrong with the request'
});
var NOT_AN_OBJECT = new PouchError({
status: 400,
error: 'bad_request',
reason: 'Document must be a JSON object'
});
var DB_MISSING = new PouchError({
status: 404,
error: 'not_found',
reason: 'Database not found'
});
var IDB_ERROR = new PouchError({
status: 500,
error: 'indexed_db_went_bad',
reason: 'unknown'
});
var WSQ_ERROR = new PouchError({
status: 500,
error: 'web_sql_went_bad',
reason: 'unknown'
});
var LDB_ERROR = new PouchError({
status: 500,
error: 'levelDB_went_went_bad',
reason: 'unknown'
});
var FORBIDDEN = new PouchError({
status: 403,
error: 'forbidden',
reason: 'Forbidden by design doc validate_doc_update function'
});
var INVALID_REV = new PouchError({
status: 400,
error: 'bad_request',
reason: 'Invalid rev format'
});
var FILE_EXISTS = new PouchError({
status: 412,
error: 'file_exists',
reason: 'The database could not be created, the file already exists.'
});
var MISSING_STUB = new PouchError({
status: 412,
error: 'missing_stub'
});
var INVALID_URL = new PouchError({
status: 413,
error: 'invalid_url',
reason: 'Provided URL is invalid'
});
var allErrors = {
UNAUTHORIZED: UNAUTHORIZED,
MISSING_BULK_DOCS: MISSING_BULK_DOCS,
MISSING_DOC: MISSING_DOC,
REV_CONFLICT: REV_CONFLICT,
INVALID_ID: INVALID_ID,
MISSING_ID: MISSING_ID,
RESERVED_ID: RESERVED_ID,
NOT_OPEN: NOT_OPEN,
UNKNOWN_ERROR: UNKNOWN_ERROR,
BAD_ARG: BAD_ARG,
INVALID_REQUEST: INVALID_REQUEST,
QUERY_PARSE_ERROR: QUERY_PARSE_ERROR,
DOC_VALIDATION: DOC_VALIDATION,
BAD_REQUEST: BAD_REQUEST,
NOT_AN_OBJECT: NOT_AN_OBJECT,
DB_MISSING: DB_MISSING,
WSQ_ERROR: WSQ_ERROR,
LDB_ERROR: LDB_ERROR,
FORBIDDEN: FORBIDDEN,
INVALID_REV: INVALID_REV,
FILE_EXISTS: FILE_EXISTS,
MISSING_STUB: MISSING_STUB,
IDB_ERROR: IDB_ERROR,
INVALID_URL: INVALID_URL
};
function createError(error, reason, name) {
function CustomPouchError(reason) {
// inherit error properties from our parent error manually
// so as to allow proper JSON parsing.
for (var p in error) {
if (typeof error[p] !== 'function') {
this[p] = error[p];
}
}
if (name !== undefined) {
this.name = name;
}
if (reason !== undefined) {
this.reason = reason;
}
}
CustomPouchError.prototype = PouchError.prototype;
return new CustomPouchError(reason);
}
// Find one of the errors defined above based on the value
// of the specified property.
// If reason is provided prefer the error matching that reason.
// This is for differentiating between errors with the same name and status,
// eg, bad_request.
var getErrorTypeByProp = function (prop, value, reason) {
var keys = Object.keys(allErrors).filter(function (key) {
var error = allErrors[key];
return typeof error !== 'function' && error[prop] === value;
});
var key = reason && keys.filter(function (key) {
var error = allErrors[key];
return error.message === reason;
})[0] || keys[0];
return (key) ? allErrors[key] : null;
};
function generateErrorFromResponse(res) {
var error, errName, errType, errMsg, errReason;
errName = (res.error === true && typeof res.name === 'string') ?
res.name :
res.error;
errReason = res.reason;
errType = getErrorTypeByProp('name', errName, errReason);
if (res.missing ||
errReason === 'missing' ||
errReason === 'deleted' ||
errName === 'not_found') {
errType = MISSING_DOC;
} else if (errName === 'doc_validation') {
// doc validation needs special treatment since
// res.reason depends on the validation error.
// see utils.js
errType = DOC_VALIDATION;
errMsg = errReason;
} else if (errName === 'bad_request' && errType.message !== errReason) {
// if bad_request error already found based on reason don't override.
errType = BAD_REQUEST;
}
// fallback to error by status or unknown error.
if (!errType) {
errType = getErrorTypeByProp('status', res.status, errReason) ||
UNKNOWN_ERROR;
}
error = createError(errType, errReason, errName);
// Keep custom message.
if (errMsg) {
error.message = errMsg;
}
// Keep helpful response data in our error messages.
if (res.id) {
error.id = res.id;
}
if (res.status) {
error.status = res.status;
}
if (res.missing) {
error.missing = res.missing;
}
return error;
}
inherits(Changes, events.EventEmitter);
function Changes(db, opts, callback) {
events.EventEmitter.call(this);
var self = this;
this.db = db;
opts = opts ? clone(opts) : {};
var complete = opts.complete = once(function (err, resp) {
if (err) {
self.emit('error', err);
} else {
self.emit('complete', resp);
}
self.removeAllListeners();
db.removeListener('destroyed', onDestroy);
});
if (callback) {
self.on('complete', function (resp) {
callback(null, resp);
});
self.on('error', callback);
}
function onDestroy() {
self.cancel();
}
db.once('destroyed', onDestroy);
opts.onChange = function (change) {
/* istanbul ignore if */
if (opts.isCancelled) {
return;
}
self.emit('change', change);
if (self.startSeq && self.startSeq <= change.seq) {
self.startSeq = false;
}
};
var promise = new PouchPromise(function (fulfill, reject) {
opts.complete = function (err, res) {
if (err) {
reject(err);
} else {
fulfill(res);
}
};
});
self.once('cancel', function () {
db.removeListener('destroyed', onDestroy);
opts.complete(null, {status: 'cancelled'});
});
this.then = promise.then.bind(promise);
this['catch'] = promise['catch'].bind(promise);
this.then(function (result) {
complete(null, result);
}, complete);
if (!db.taskqueue.isReady) {
db.taskqueue.addTask(function () {
if (self.isCancelled) {
self.emit('cancel');
} else {
self.doChanges(opts);
}
});
} else {
self.doChanges(opts);
}
}
Changes.prototype.cancel = function () {
this.isCancelled = true;
if (this.db.taskqueue.isReady) {
this.emit('cancel');
}
};
function processChange(doc, metadata, opts) {
var changeList = [{rev: doc._rev}];
if (opts.style === 'all_docs') {
changeList = collectLeaves(metadata.rev_tree)
.map(function (x) { return {rev: x.rev}; });
}
var change = {
id: metadata.id,
changes: changeList,
doc: doc
};
if (isDeleted(metadata, doc._rev)) {
change.deleted = true;
}
if (opts.conflicts) {
change.doc._conflicts = collectConflicts(metadata);
if (!change.doc._conflicts.length) {
delete change.doc._conflicts;
}
}
return change;
}
Changes.prototype.doChanges = function (opts) {
var self = this;
var callback = opts.complete;
opts = clone(opts);
if ('live' in opts && !('continuous' in opts)) {
opts.continuous = opts.live;
}
opts.processChange = processChange;
if (opts.since === 'latest') {
opts.since = 'now';
}
if (!opts.since) {
opts.since = 0;
}
if (opts.since === 'now') {
this.db.info().then(function (info) {
/* istanbul ignore if */
if (self.isCancelled) {
callback(null, {status: 'cancelled'});
return;
}
opts.since = info.update_seq;
self.doChanges(opts);
}, callback);
return;
}
if (opts.continuous && opts.since !== 'now') {
this.db.info().then(function (info) {
self.startSeq = info.update_seq;
/* istanbul ignore next */
}, function (err) {
if (err.id === 'idbNull') {
// db closed before this returned thats ok
return;
}
throw err;
});
}
if (opts.filter && typeof opts.filter === 'string') {
if (opts.filter === '_view') {
opts.view = normalizeDesignDocFunctionName(opts.view);
} else {
opts.filter = normalizeDesignDocFunctionName(opts.filter);
}
if (this.db.type() !== 'http' && !opts.doc_ids) {
return this.filterChanges(opts);
}
}
if (!('descending' in opts)) {
opts.descending = false;
}
// 0 and 1 should return 1 document
opts.limit = opts.limit === 0 ? 1 : opts.limit;
opts.complete = callback;
var newPromise = this.db._changes(opts);
if (newPromise && typeof newPromise.cancel === 'function') {
var cancel = self.cancel;
self.cancel = getArguments(function (args) {
newPromise.cancel();
cancel.apply(this, args);
});
}
};
Changes.prototype.filterChanges = function (opts) {
var self = this;
var callback = opts.complete;
if (opts.filter === '_view') {
if (!opts.view || typeof opts.view !== 'string') {
var err = createError(BAD_REQUEST,
'`view` filter parameter not found or invalid.');
return callback(err);
}
// fetch a view from a design doc, make it behave like a filter
var viewName = parseDesignDocFunctionName(opts.view);
this.db.getView(viewName[0], viewName[1], function (err, view) {
/* istanbul ignore if */
if (self.isCancelled) {
return callback(null, {status: 'cancelled'});
}
/* istanbul ignore next */
if (err) {
return callback(generateErrorFromResponse(err));
}
if (!view.map) {
return callback(createError(MISSING_DOC));
}
opts.filter = evalView(view.map);
self.doChanges(opts);
});
} else {
// fetch a filter from a design doc
var filterName = parseDesignDocFunctionName(opts.filter);
if (!filterName) {
return self.doChanges(opts);
}
this.db.getFilter(filterName[0], filterName[1], function (err, filterFun) {
/* istanbul ignore if */
if (self.isCancelled) {
return callback(null, {status: 'cancelled'});
}
/* istanbul ignore next */
if (err) {
return callback(generateErrorFromResponse(err));
}
opts.filter = evalFilter(filterFun);
self.doChanges(opts);
});
}
};
// shim for P/CouchDB adapters that don't directly implement _bulk_get
function bulkGet(db, opts, callback) {
var requests = Array.isArray(opts) ? opts : opts.docs;
// consolidate into one request per doc if possible
var requestsById = {};
requests.forEach(function (request) {
if (request.id in requestsById) {
requestsById[request.id].push(request);
} else {
requestsById[request.id] = [request];
}
});
var numDocs = Object.keys(requestsById).length;
var numDone = 0;
var perDocResults = new Array(numDocs);
function collapseResults() {
var results = [];
perDocResults.forEach(function (res) {
res.docs.forEach(function (info) {
results.push({
id: res.id,
docs: [info]
});
});
});
callback(null, {results: results});
}
function checkDone() {
if (++numDone === numDocs) {
collapseResults();
}
}
function gotResult(i, id, docs) {
perDocResults[i] = {id: id, docs: docs};
checkDone();
}
Object.keys(requestsById).forEach(function (docId, i) {
var docRequests = requestsById[docId];
// just use the first request as the "template"
// TODO: The _bulk_get API allows for more subtle use cases than this,
// but for now it is unlikely that there will be a mix of different
// "atts_since" or "attachments" in the same request, since it's just
// replicate.js that is using this for the moment.
// Also, atts_since is aspirational, since we don't support it yet.
var docOpts = pick(docRequests[0], ['atts_since', 'attachments']);
docOpts.open_revs = docRequests.map(function (request) {
// rev is optional, open_revs disallowed
return request.rev;
});
// remove falsey / undefined revisions
docOpts.open_revs = docOpts.open_revs.filter(function (e) { return e; });
var formatResult = function (result) { return result; };
if (docOpts.open_revs.length === 0) {
delete docOpts.open_revs;
// when fetching only the "winning" leaf,
// transform the result so it looks like an open_revs
// request
formatResult = function (result) {
return [{
ok: result
}];
};
}
// globally-supplied options
['revs', 'attachments', 'binary', 'ajax'].forEach(function (param) {
if (param in opts) {
docOpts[param] = opts[param];
}
});
db.get(docId, docOpts, function (err, res) {
gotResult(i, docId, err ? [{error: err}] : formatResult(res));
});
});
}
function isLocalId(id) {
return (/^_local/).test(id);
}
// build up a list of all the paths to the leafs in this revision tree
function rootToLeaf(revs) {
var paths = [];
var toVisit = revs.slice();
var node;
while ((node = toVisit.pop())) {
var pos = node.pos;
var tree = node.ids;
var id = tree[0];
var opts = tree[1];
var branches = tree[2];
var isLeaf = branches.length === 0;
var history = node.history ? node.history.slice() : [];
history.push({id: id, opts: opts});
if (isLeaf) {
paths.push({pos: (pos + 1 - history.length), ids: history});
}
for (var i = 0, len = branches.length; i < len; i++) {
toVisit.push({pos: pos + 1, ids: branches[i], history: history});
}
}
return paths.reverse();
}
// BEGIN Math.uuid.js
/*!
Math.uuid.js (v1.4)
http://www.broofa.com
mailto:robert@broofa.com
Copyright (c) 2010 Robert Kieffer
Dual licensed under the MIT and GPL licenses.
*/
/*
* Generate a random uuid.
*
* USAGE: Math.uuid(length, radix)
* length - the desired number of characters
* radix - the number of allowable values for each character.
*
* EXAMPLES:
* // No arguments - returns RFC4122, version 4 ID
* >>> Math.uuid()
* "92329D39-6F5C-4520-ABFC-AAB64544E172"
*
* // One argument - returns ID of the specified length
* >>> Math.uuid(15) // 15 character ID (default base=62)
* "VcydxgltxrVZSTV"
*
* // Two arguments - returns ID of the specified length, and radix.
* // (Radix must be <= 62)
* >>> Math.uuid(8, 2) // 8 character ID (base=2)
* "01001010"
* >>> Math.uuid(8, 10) // 8 character ID (base=10)
* "47473046"
* >>> Math.uuid(8, 16) // 8 character ID (base=16)
* "098F4D35"
*/
var chars = (
'0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ' +
'abcdefghijklmnopqrstuvwxyz'
).split('');
function getValue(radix) {
return 0 | Math.random() * radix;
}
function uuid(len, radix) {
radix = radix || chars.length;
var out = '';
var i = -1;
if (len) {
// Compact form
while (++i < len) {
out += chars[getValue(radix)];
}
return out;
}
// rfc4122, version 4 form
// Fill in random data. At i==19 set the high bits of clock sequence as
// per rfc4122, sec. 4.1.5
while (++i < 36) {
switch (i) {
case 8:
case 13:
case 18:
case 23:
out += '-';
break;
case 19:
out += chars[(getValue(16) & 0x3) | 0x8];
break;
default:
out += chars[getValue(16)];
}
}
return out;
}
function toObject(array) {
return array.reduce(function (obj, item) {
obj[item] = true;
return obj;
}, {});
}
// List of top level reserved words for doc
var reservedWords = toObject([
'_id',
'_rev',
'_attachments',
'_deleted',
'_revisions',
'_revs_info',
'_conflicts',
'_deleted_conflicts',
'_local_seq',
'_rev_tree',
//replication documents
'_replication_id',
'_replication_state',
'_replication_state_time',
'_replication_state_reason',
'_replication_stats',
// Specific to Couchbase Sync Gateway
'_removed'
]);
// List of reserved words that should end up the document
var dataWords = toObject([
'_attachments',
//replication documents
'_replication_id',
'_replication_state',
'_replication_state_time',
'_replication_state_reason',
'_replication_stats'
]);
// Determine id an ID is valid
// - invalid IDs begin with an underescore that does not begin '_design' or
// '_local'
// - any other string value is a valid id
// Returns the specific error object for each case
function invalidIdError(id) {
var err;
if (!id) {
err = createError(MISSING_ID);
} else if (typeof id !== 'string') {
err = createError(INVALID_ID);
} else if (/^_/.test(id) && !(/^_(design|local)/).test(id)) {
err = createError(RESERVED_ID);
}
if (err) {
throw err;
}
}
function parseRevisionInfo(rev) {
if (!/^\d+\-./.test(rev)) {
return createError(INVALID_REV);
}
var idx = rev.indexOf('-');
var left = rev.substring(0, idx);
var right = rev.substring(idx + 1);
return {
prefix: parseInt(left, 10),
id: right
};
}
function makeRevTreeFromRevisions(revisions, opts) {
var pos = revisions.start - revisions.ids.length + 1;
var revisionIds = revisions.ids;
var ids = [revisionIds[0], opts, []];
for (var i = 1, len = revisionIds.length; i < len; i++) {
ids = [revisionIds[i], {status: 'missing'}, [ids]];
}
return [{
pos: pos,
ids: ids
}];
}
// Preprocess documents, parse their revisions, assign an id and a
// revision for new writes that are missing them, etc
function parseDoc(doc, newEdits) {
var nRevNum;
var newRevId;
var revInfo;
var opts = {status: 'available'};
if (doc._deleted) {
opts.deleted = true;
}
if (newEdits) {
if (!doc._id) {
doc._id = uuid();
}
newRevId = uuid(32, 16).toLowerCase();
if (doc._rev) {
revInfo = parseRevisionInfo(doc._rev);
if (revInfo.error) {
return revInfo;
}
doc._rev_tree = [{
pos: revInfo.prefix,
ids: [revInfo.id, {status: 'missing'}, [[newRevId, opts, []]]]
}];
nRevNum = revInfo.prefix + 1;
} else {
doc._rev_tree = [{
pos: 1,
ids : [newRevId, opts, []]
}];
nRevNum = 1;
}
} else {
if (doc._revisions) {
doc._rev_tree = makeRevTreeFromRevisions(doc._revisions, opts);
nRevNum = doc._revisions.start;
newRevId = doc._revisions.ids[0];
}
if (!doc._rev_tree) {
revInfo = parseRevisionInfo(doc._rev);
if (revInfo.error) {
return revInfo;
}
nRevNum = revInfo.prefix;
newRevId = revInfo.id;
doc._rev_tree = [{
pos: nRevNum,
ids: [newRevId, opts, []]
}];
}
}
invalidIdError(doc._id);
doc._rev = nRevNum + '-' + newRevId;
var result = {metadata : {}, data : {}};
for (var key in doc) {
/* istanbul ignore else */
if (Object.prototype.hasOwnProperty.call(doc, key)) {
var specialKey = key[0] === '_';
if (specialKey && !reservedWords[key]) {
var error = createError(DOC_VALIDATION, key);
error.message = DOC_VALIDATION.message + ': ' + key;
throw error;
} else if (specialKey && !dataWords[key]) {
result.metadata[key.slice(1)] = doc[key];
} else {
result.data[key] = doc[key];
}
}
}
return result;
}
/*
* A generic pouch adapter
*/
function compare(left, right) {
return left < right ? -1 : left > right ? 1 : 0;
}
// returns first element of arr satisfying callback predicate
function arrayFirst(arr, callback) {
for (var i = 0; i < arr.length; i++) {
if (callback(arr[i], i) === true) {
return arr[i];
}
}
}
// Wrapper for functions that call the bulkdocs api with a single doc,
// if the first result is an error, return an error
function yankError(callback) {
return function (err, results) {
if (err || (results[0] && results[0].error)) {
callback(err || results[0]);
} else {
callback(null, results.length ? results[0] : results);
}
};
}
// clean docs given to us by the user
function cleanDocs(docs) {
for (var i = 0; i < docs.length; i++) {
var doc = docs[i];
if (doc._deleted) {
delete doc._attachments; // ignore atts for deleted docs
} else if (doc._attachments) {
// filter out extraneous keys from _attachments
var atts = Object.keys(doc._attachments);
for (var j = 0; j < atts.length; j++) {
var att = atts[j];
doc._attachments[att] = pick(doc._attachments[att],
['data', 'digest', 'content_type', 'length', 'revpos', 'stub']);
}
}
}
}
// compare two docs, first by _id then by _rev
function compareByIdThenRev(a, b) {
var idCompare = compare(a._id, b._id);
if (idCompare !== 0) {
return idCompare;
}
var aStart = a._revisions ? a._revisions.start : 0;
var bStart = b._revisions ? b._revisions.start : 0;
return compare(aStart, bStart);
}
// for every node in a revision tree computes its distance from the closest
// leaf
function computeHeight(revs) {
var height = {};
var edges = [];
traverseRevTree(revs, function (isLeaf, pos, id, prnt) {
var rev = pos + "-" + id;
if (isLeaf) {
height[rev] = 0;
}
if (prnt !== undefined) {
edges.push({from: prnt, to: rev});
}
return rev;
});
edges.reverse();
edges.forEach(function (edge) {
if (height[edge.from] === undefined) {
height[edge.from] = 1 + height[edge.to];
} else {
height[edge.from] = Math.min(height[edge.from], 1 + height[edge.to]);
}
});
return height;
}
function allDocsKeysQuery(api, opts, callback) {
var keys = ('limit' in opts) ?
opts.keys.slice(opts.skip, opts.limit + opts.skip) :
(opts.skip > 0) ? opts.keys.slice(opts.skip) : opts.keys;
if (opts.descending) {
keys.reverse();
}
if (!keys.length) {
return api._allDocs({limit: 0}, callback);
}
var finalResults = {
offset: opts.skip
};
return PouchPromise.all(keys.map(function (key) {
var subOpts = jsExtend.extend({key: key, deleted: 'ok'}, opts);
['limit', 'skip', 'keys'].forEach(function (optKey) {
delete subOpts[optKey];
});
return new PouchPromise(function (resolve, reject) {
api._allDocs(subOpts, function (err, res) {
/* istanbul ignore if */
if (err) {
return reject(err);
}
finalResults.total_rows = res.total_rows;
resolve(res.rows[0] || {key: key, error: 'not_found'});
});
});
})).then(function (results) {
finalResults.rows = results;
return finalResults;
});
}
// all compaction is done in a queue, to avoid attaching
// too many listeners at once
function doNextCompaction(self) {
var task = self._compactionQueue[0];
var opts = task.opts;
var callback = task.callback;
self.get('_local/compaction').catch(function () {
return false;
}).then(function (doc) {
if (doc && doc.last_seq) {
opts.last_seq = doc.last_seq;
}
self._compact(opts, function (err, res) {
/* istanbul ignore if */
if (err) {
callback(err);
} else {
callback(null, res);
}
process.nextTick(function () {
self._compactionQueue.shift();
if (self._compactionQueue.length) {
doNextCompaction(self);
}
});
});
});
}
function attachmentNameError(name) {
if (name.charAt(0) === '_') {
return name + 'is not a valid attachment name, attachment ' +
'names cannot start with \'_\'';
}
return false;
}
function cacheUpdateRequired(api, cache, designDocName, callback) {
cache.seq = cache.seq || 0;
var changesOpts = {
doc_ids: [ '_design/' + designDocName ],
limit: 1,
since: cache.seq
};
api.changes(changesOpts).then(function (res) {
var latestSeq = res.results && res.results.length && res.results[0].seq;
if (latestSeq && latestSeq > cache.seq) {
// invalidate the cache
cache.seq = latestSeq;
delete cache.promise;
}
callback();
}).catch(callback);
}
function getDesignDocCache(api, designDocName, callback) {
api._ddocCache = api._ddocCache || {};
api._ddocCache[designDocName] = api._ddocCache[designDocName] || {};
var cache = api._ddocCache[designDocName];
cacheUpdateRequired(api, cache, designDocName, function (err) {
if (err) {
return callback(err);
}
if (!cache.promise) {
cache.promise = new PouchPromise(function (resolve, reject) {
api._get('_design/' + designDocName, {}, function (err, res) {
if (err) {
return reject(err);
}
var cache = {};
['views', 'filters'].forEach(function (propertyName) {
cache[propertyName] = res.doc[propertyName];
});
resolve(cache);
});
});
}
cache.promise.then(function (cache) {
callback(null, cache);
}).catch(callback);
});
}
function getDesignDocProperty(api, designDocName, propertyName,
propertyElement, callback) {
getDesignDocCache(api, designDocName, function (err, designDoc) {
if (err) {
return callback(err);
}
var element = designDoc[propertyName] &&
designDoc[propertyName][propertyElement];
if (!element) {
return callback(createError(MISSING_DOC));
}
callback(null, element);
});
}
inherits(AbstractPouchDB, events.EventEmitter);
function AbstractPouchDB() {
events.EventEmitter.call(this);
}
AbstractPouchDB.prototype.post =
adapterFun('post', function (doc, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (typeof doc !== 'object' || Array.isArray(doc)) {
return callback(createError(NOT_AN_OBJECT));
}
this.bulkDocs({docs: [doc]}, opts, yankError(callback));
});
AbstractPouchDB.prototype.put =
adapterFun('put', getArguments(function (args) {
var temp, temptype, opts, callback;
var doc = args.shift();
var id = '_id' in doc;
if (typeof doc !== 'object' || Array.isArray(doc)) {
callback = args.pop();
return callback(createError(NOT_AN_OBJECT));
}
/* eslint no-constant-condition: 0 */
while (true) {
temp = args.shift();
temptype = typeof temp;
if (temptype === "string" && !id) {
doc._id = temp;
id = true;
} else if (temptype === "string" && id && !('_rev' in doc)) {
doc._rev = temp;
} else if (temptype === "object") {
opts = temp;
} else if (temptype === "function") {
callback = temp;
}
if (!args.length) {
break;
}
}
opts = opts || {};
invalidIdError(doc._id);
if (isLocalId(doc._id) && typeof this._putLocal === 'function') {
if (doc._deleted) {
return this._removeLocal(doc, callback);
} else {
return this._putLocal(doc, callback);
}
}
this.bulkDocs({docs: [doc]}, opts, yankError(callback));
}));
AbstractPouchDB.prototype.putAttachment =
adapterFun('putAttachment', function (docId, attachmentId, rev,
blob, type) {
var api = this;
if (typeof type === 'function') {
type = blob;
blob = rev;
rev = null;
}
// Lets fix in https://github.com/pouchdb/pouchdb/issues/3267
/* istanbul ignore if */
if (typeof type === 'undefined') {
type = blob;
blob = rev;
rev = null;
}
function createAttachment(doc) {
var prevrevpos = '_rev' in doc ? parseInt(doc._rev, 10) : 0;
doc._attachments = doc._attachments || {};
doc._attachments[attachmentId] = {
content_type: type,
data: blob,
revpos: ++prevrevpos
};
return api.put(doc);
}
return api.get(docId).then(function (doc) {
if (doc._rev !== rev) {
throw createError(REV_CONFLICT);
}
return createAttachment(doc);
}, function (err) {
// create new doc
/* istanbul ignore else */
if (err.reason === MISSING_DOC.message) {
return createAttachment({_id: docId});
} else {
throw err;
}
});
});
AbstractPouchDB.prototype.removeAttachment =
adapterFun('removeAttachment', function (docId, attachmentId, rev,
callback) {
var self = this;
self.get(docId, function (err, obj) {
/* istanbul ignore if */
if (err) {
callback(err);
return;
}
if (obj._rev !== rev) {
callback(createError(REV_CONFLICT));
return;
}
/* istanbul ignore if */
if (!obj._attachments) {
return callback();
}
delete obj._attachments[attachmentId];
if (Object.keys(obj._attachments).length === 0) {
delete obj._attachments;
}
self.put(obj, callback);
});
});
AbstractPouchDB.prototype.remove =
adapterFun('remove', function (docOrId, optsOrRev, opts, callback) {
var doc;
if (typeof optsOrRev === 'string') {
// id, rev, opts, callback style
doc = {
_id: docOrId,
_rev: optsOrRev
};
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
} else {
// doc, opts, callback style
doc = docOrId;
if (typeof optsOrRev === 'function') {
callback = optsOrRev;
opts = {};
} else {
callback = opts;
opts = optsOrRev;
}
}
opts = opts || {};
opts.was_delete = true;
var newDoc = {_id: doc._id, _rev: (doc._rev || opts.rev)};
newDoc._deleted = true;
if (isLocalId(newDoc._id) && typeof this._removeLocal === 'function') {
return this._removeLocal(doc, callback);
}
this.bulkDocs({docs: [newDoc]}, opts, yankError(callback));
});
AbstractPouchDB.prototype.revsDiff =
adapterFun('revsDiff', function (req, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
var ids = Object.keys(req);
if (!ids.length) {
return callback(null, {});
}
var count = 0;
var missing = new pouchdbCollections.Map();
function addToMissing(id, revId) {
if (!missing.has(id)) {
missing.set(id, {missing: []});
}
missing.get(id).missing.push(revId);
}
function processDoc(id, rev_tree) {
// Is this fast enough? Maybe we should switch to a set simulated by a map
var missingForId = req[id].slice(0);
traverseRevTree(rev_tree, function (isLeaf, pos, revHash, ctx,
opts) {
var rev = pos + '-' + revHash;
var idx = missingForId.indexOf(rev);
if (idx === -1) {
return;
}
missingForId.splice(idx, 1);
/* istanbul ignore if */
if (opts.status !== 'available') {
addToMissing(id, rev);
}
});
// Traversing the tree is synchronous, so now `missingForId` contains
// revisions that were not found in the tree
missingForId.forEach(function (rev) {
addToMissing(id, rev);
});
}
ids.map(function (id) {
this._getRevisionTree(id, function (err, rev_tree) {
if (err && err.status === 404 && err.message === 'missing') {
missing.set(id, {missing: req[id]});
} else if (err) {
/* istanbul ignore next */
return callback(err);
} else {
processDoc(id, rev_tree);
}
if (++count === ids.length) {
// convert LazyMap to object
var missingObj = {};
missing.forEach(function (value, key) {
missingObj[key] = value;
});
return callback(null, missingObj);
}
});
}, this);
});
// _bulk_get API for faster replication, as described in
// https://github.com/apache/couchdb-chttpd/pull/33
// At the "abstract" level, it will just run multiple get()s in
// parallel, because this isn't much of a performance cost
// for local databases (except the cost of multiple transactions, which is
// small). The http adapter overrides this in order
// to do a more efficient single HTTP request.
AbstractPouchDB.prototype.bulkGet =
adapterFun('bulkGet', function (opts, callback) {
bulkGet(this, opts, callback);
});
// compact one document and fire callback
// by compacting we mean removing all revisions which
// are further from the leaf in revision tree than max_height
AbstractPouchDB.prototype.compactDocument =
adapterFun('compactDocument', function (docId, maxHeight, callback) {
var self = this;
this._getRevisionTree(docId, function (err, revTree) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
var height = computeHeight(revTree);
var candidates = [];
var revs = [];
Object.keys(height).forEach(function (rev) {
if (height[rev] > maxHeight) {
candidates.push(rev);
}
});
traverseRevTree(revTree, function (isLeaf, pos, revHash, ctx, opts) {
var rev = pos + '-' + revHash;
if (opts.status === 'available' && candidates.indexOf(rev) !== -1) {
revs.push(rev);
}
});
self._doCompaction(docId, revs, callback);
});
});
// compact the whole database using single document
// compaction
AbstractPouchDB.prototype.compact =
adapterFun('compact', function (opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
var self = this;
opts = opts || {};
self._compactionQueue = self._compactionQueue || [];
self._compactionQueue.push({opts: opts, callback: callback});
if (self._compactionQueue.length === 1) {
doNextCompaction(self);
}
});
AbstractPouchDB.prototype._compact = function (opts, callback) {
var self = this;
var changesOpts = {
return_docs: false,
last_seq: opts.last_seq || 0
};
var promises = [];
function onChange(row) {
promises.push(self.compactDocument(row.id, 0));
}
function onComplete(resp) {
var lastSeq = resp.last_seq;
PouchPromise.all(promises).then(function () {
return upsert(self, '_local/compaction', function deltaFunc(doc) {
if (!doc.last_seq || doc.last_seq < lastSeq) {
doc.last_seq = lastSeq;
return doc;
}
return false; // somebody else got here first, don't update
});
}).then(function () {
callback(null, {ok: true});
}).catch(callback);
}
self.changes(changesOpts)
.on('change', onChange)
.on('complete', onComplete)
.on('error', callback);
};
/* Begin api wrappers. Specific functionality to storage belongs in the
_[method] */
AbstractPouchDB.prototype.get =
adapterFun('get', function (id, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (typeof id !== 'string') {
return callback(createError(INVALID_ID));
}
if (isLocalId(id) && typeof this._getLocal === 'function') {
return this._getLocal(id, callback);
}
var leaves = [], self = this;
function finishOpenRevs() {
var result = [];
var count = leaves.length;
/* istanbul ignore if */
if (!count) {
return callback(null, result);
}
// order with open_revs is unspecified
leaves.forEach(function (leaf) {
self.get(id, {
rev: leaf,
revs: opts.revs,
attachments: opts.attachments
}, function (err, doc) {
if (!err) {
result.push({ok: doc});
} else {
result.push({missing: leaf});
}
count--;
if (!count) {
callback(null, result);
}
});
});
}
if (opts.open_revs) {
if (opts.open_revs === "all") {
this._getRevisionTree(id, function (err, rev_tree) {
if (err) {
return callback(err);
}
leaves = collectLeaves(rev_tree).map(function (leaf) {
return leaf.rev;
});
finishOpenRevs();
});
} else {
if (Array.isArray(opts.open_revs)) {
leaves = opts.open_revs;
for (var i = 0; i < leaves.length; i++) {
var l = leaves[i];
// looks like it's the only thing couchdb checks
if (!(typeof (l) === "string" && /^\d+-/.test(l))) {
return callback(createError(INVALID_REV));
}
}
finishOpenRevs();
} else {
return callback(createError(UNKNOWN_ERROR,
'function_clause'));
}
}
return; // open_revs does not like other options
}
return this._get(id, opts, function (err, result) {
if (err) {
return callback(err);
}
var doc = result.doc;
var metadata = result.metadata;
var ctx = result.ctx;
if (opts.conflicts) {
var conflicts = collectConflicts(metadata);
if (conflicts.length) {
doc._conflicts = conflicts;
}
}
if (isDeleted(metadata, doc._rev)) {
doc._deleted = true;
}
if (opts.revs || opts.revs_info) {
var paths = rootToLeaf(metadata.rev_tree);
var path = arrayFirst(paths, function (arr) {
return arr.ids.map(function (x) { return x.id; })
.indexOf(doc._rev.split('-')[1]) !== -1;
});
var indexOfRev = path.ids.map(function (x) {return x.id; })
.indexOf(doc._rev.split('-')[1]) + 1;
var howMany = path.ids.length - indexOfRev;
path.ids.splice(indexOfRev, howMany);
path.ids.reverse();
if (opts.revs) {
doc._revisions = {
start: (path.pos + path.ids.length) - 1,
ids: path.ids.map(function (rev) {
return rev.id;
})
};
}
if (opts.revs_info) {
var pos = path.pos + path.ids.length;
doc._revs_info = path.ids.map(function (rev) {
pos--;
return {
rev: pos + '-' + rev.id,
status: rev.opts.status
};
});
}
}
if (opts.attachments && doc._attachments) {
var attachments = doc._attachments;
var count = Object.keys(attachments).length;
if (count === 0) {
return callback(null, doc);
}
Object.keys(attachments).forEach(function (key) {
this._getAttachment(attachments[key], {
binary: opts.binary,
ctx: ctx
}, function (err, data) {
var att = doc._attachments[key];
att.data = data;
delete att.stub;
delete att.length;
if (!--count) {
callback(null, doc);
}
});
}, self);
} else {
if (doc._attachments) {
for (var key in doc._attachments) {
/* istanbul ignore else */
if (doc._attachments.hasOwnProperty(key)) {
doc._attachments[key].stub = true;
}
}
}
callback(null, doc);
}
});
});
AbstractPouchDB.prototype.getView =
adapterFun('getView', function (designDocName, viewName, callback) {
getDesignDocProperty(this, designDocName, 'views', viewName, callback);
});
AbstractPouchDB.prototype.getFilter =
adapterFun('getFilter', function (designDocName, filterName, callback) {
getDesignDocProperty(this, designDocName, 'filters', filterName, callback);
});
AbstractPouchDB.prototype.getAttachment =
adapterFun('getAttachment', function (docId, attachmentId, opts,
callback) {
var self = this;
if (opts instanceof Function) {
callback = opts;
opts = {};
}
this._get(docId, opts, function (err, res) {
if (err) {
return callback(err);
}
if (res.doc._attachments && res.doc._attachments[attachmentId]) {
opts.ctx = res.ctx;
opts.binary = true;
self._getAttachment(res.doc._attachments[attachmentId], opts, callback);
} else {
return callback(createError(MISSING_DOC));
}
});
});
AbstractPouchDB.prototype.allDocs =
adapterFun('allDocs', function (opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
opts.skip = typeof opts.skip !== 'undefined' ? opts.skip : 0;
if (opts.start_key) {
opts.startkey = opts.start_key;
}
if (opts.end_key) {
opts.endkey = opts.end_key;
}
if ('keys' in opts) {
if (!Array.isArray(opts.keys)) {
return callback(new TypeError('options.keys must be an array'));
}
var incompatibleOpt =
['startkey', 'endkey', 'key'].filter(function (incompatibleOpt) {
return incompatibleOpt in opts;
})[0];
if (incompatibleOpt) {
callback(createError(QUERY_PARSE_ERROR,
'Query parameter `' + incompatibleOpt +
'` is not compatible with multi-get'
));
return;
}
if (this.type() !== 'http') {
return allDocsKeysQuery(this, opts, callback);
}
}
return this._allDocs(opts, callback);
});
AbstractPouchDB.prototype.changes = function (opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
return new Changes(this, opts, callback);
};
AbstractPouchDB.prototype.close =
adapterFun('close', function (callback) {
this._closed = true;
return this._close(callback);
});
AbstractPouchDB.prototype.info = adapterFun('info', function (callback) {
var self = this;
this._info(function (err, info) {
if (err) {
return callback(err);
}
// assume we know better than the adapter, unless it informs us
info.db_name = info.db_name || self._db_name;
info.auto_compaction = !!(self.auto_compaction && self.type() !== 'http');
info.adapter = self.type();
callback(null, info);
});
});
AbstractPouchDB.prototype.id = adapterFun('id', function (callback) {
return this._id(callback);
});
AbstractPouchDB.prototype.type = function () {
/* istanbul ignore next */
return (typeof this._type === 'function') ? this._type() : this.adapter;
};
AbstractPouchDB.prototype.bulkDocs =
adapterFun('bulkDocs', function (req, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
opts = opts || {};
if (Array.isArray(req)) {
req = {
docs: req
};
}
if (!req || !req.docs || !Array.isArray(req.docs)) {
return callback(createError(MISSING_BULK_DOCS));
}
for (var i = 0; i < req.docs.length; ++i) {
if (typeof req.docs[i] !== 'object' || Array.isArray(req.docs[i])) {
return callback(createError(NOT_AN_OBJECT));
}
}
var attachmentError;
req.docs.forEach(function (doc) {
if (doc._attachments) {
Object.keys(doc._attachments).forEach(function (name) {
attachmentError = attachmentError || attachmentNameError(name);
});
}
});
if (attachmentError) {
return callback(createError(BAD_REQUEST, attachmentError));
}
if (!('new_edits' in opts)) {
if ('new_edits' in req) {
opts.new_edits = req.new_edits;
} else {
opts.new_edits = true;
}
}
if (!opts.new_edits && this.type() !== 'http') {
// ensure revisions of the same doc are sorted, so that
// the local adapter processes them correctly (#2935)
req.docs.sort(compareByIdThenRev);
}
cleanDocs(req.docs);
return this._bulkDocs(req, opts, function (err, res) {
if (err) {
return callback(err);
}
if (!opts.new_edits) {
// this is what couch does when new_edits is false
res = res.filter(function (x) {
return x.error;
});
}
callback(null, res);
});
});
AbstractPouchDB.prototype.registerDependentDatabase =
adapterFun('registerDependentDatabase', function (dependentDb,
callback) {
var depDB = new this.constructor(dependentDb, this.__opts);
function diffFun(doc) {
doc.dependentDbs = doc.dependentDbs || {};
if (doc.dependentDbs[dependentDb]) {
return false; // no update required
}
doc.dependentDbs[dependentDb] = true;
return doc;
}
upsert(this, '_local/_pouch_dependentDbs', diffFun)
.then(function () {
callback(null, {db: depDB});
}).catch(callback);
});
AbstractPouchDB.prototype.destroy =
adapterFun('destroy', function (opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
var self = this;
var usePrefix = 'use_prefix' in self ? self.use_prefix : true;
function destroyDb() {
// call destroy method of the particular adaptor
self._destroy(opts, function (err, resp) {
if (err) {
return callback(err);
}
self._destroyed = true;
self.emit('destroyed');
callback(null, resp || { 'ok': true });
});
}
if (self.type() === 'http') {
// no need to check for dependent DBs if it's a remote DB
return destroyDb();
}
self.get('_local/_pouch_dependentDbs', function (err, localDoc) {
if (err) {
/* istanbul ignore if */
if (err.status !== 404) {
return callback(err);
} else { // no dependencies
return destroyDb();
}
}
var dependentDbs = localDoc.dependentDbs;
var PouchDB = self.constructor;
var deletedMap = Object.keys(dependentDbs).map(function (name) {
// use_prefix is only false in the browser
/* istanbul ignore next */
var trueName = usePrefix ?
name.replace(new RegExp('^' + PouchDB.prefix), '') : name;
return new PouchDB(trueName, self.__opts).destroy();
});
PouchPromise.all(deletedMap).then(destroyDb, callback);
});
});
function TaskQueue() {
this.isReady = false;
this.failed = false;
this.queue = [];
}
TaskQueue.prototype.execute = function () {
var fun;
if (this.failed) {
while ((fun = this.queue.shift())) {
fun(this.failed);
}
} else {
while ((fun = this.queue.shift())) {
fun();
}
}
};
TaskQueue.prototype.fail = function (err) {
this.failed = err;
this.execute();
};
TaskQueue.prototype.ready = function (db) {
this.isReady = true;
this.db = db;
this.execute();
};
TaskQueue.prototype.addTask = function (fun) {
this.queue.push(fun);
if (this.failed) {
this.execute();
}
};
function defaultCallback(err) {
/* istanbul ignore next */
if (err && global.debug) {
console.error(err);
}
}
// OK, so here's the deal. Consider this code:
// var db1 = new PouchDB('foo');
// var db2 = new PouchDB('foo');
// db1.destroy();
// ^ these two both need to emit 'destroyed' events,
// as well as the PouchDB constructor itself.
// So we have one db object (whichever one got destroy() called on it)
// responsible for emitting the initial event, which then gets emitted
// by the constructor, which then broadcasts it to any other dbs
// that may have been created with the same name.
function prepareForDestruction(self, opts) {
var name = opts.originalName;
var ctor = self.constructor;
var destructionListeners = ctor._destructionListeners;
function onDestroyed() {
ctor.emit('destroyed', name);
}
function onConstructorDestroyed() {
self.removeListener('destroyed', onDestroyed);
self.emit('destroyed', self);
}
self.once('destroyed', onDestroyed);
// in setup.js, the constructor is primed to listen for destroy events
if (!destructionListeners.has(name)) {
destructionListeners.set(name, []);
}
destructionListeners.get(name).push(onConstructorDestroyed);
}
inherits(PouchDB, AbstractPouchDB);
function PouchDB(name, opts, callback) {
if (!(this instanceof PouchDB)) {
return new PouchDB(name, opts, callback);
}
var self = this;
if (typeof opts === 'function' || typeof opts === 'undefined') {
callback = opts;
opts = {};
}
if (name && typeof name === 'object') {
opts = name;
name = undefined;
}
if (typeof callback === 'undefined') {
callback = defaultCallback;
}
name = name || opts.name;
opts = clone(opts);
// if name was specified via opts, ignore for the sake of dependentDbs
delete opts.name;
this.__opts = opts;
var oldCB = callback;
self.auto_compaction = opts.auto_compaction;
self.prefix = PouchDB.prefix;
AbstractPouchDB.call(self);
self.taskqueue = new TaskQueue();
var promise = new PouchPromise(function (fulfill, reject) {
callback = function (err, resp) {
/* istanbul ignore if */
if (err) {
return reject(err);
}
delete resp.then;
fulfill(resp);
};
opts = clone(opts);
var originalName = opts.name || name;
var backend, error;
(function () {
try {
if (typeof originalName !== 'string') {
error = new Error('Missing/invalid DB name');
error.code = 400;
throw error;
}
backend = PouchDB.parseAdapter(originalName, opts);
opts.originalName = originalName;
opts.name = backend.name;
if (opts.prefix && backend.adapter !== 'http' &&
backend.adapter !== 'https') {
opts.name = opts.prefix + opts.name;
}
opts.adapter = opts.adapter || backend.adapter;
self._adapter = opts.adapter;
debug('pouchdb:adapter')('Picked adapter: ' + opts.adapter);
self._db_name = originalName;
if (!PouchDB.adapters[opts.adapter]) {
error = new Error('Adapter is missing');
error.code = 404;
throw error;
}
/* istanbul ignore if */
if (!PouchDB.adapters[opts.adapter].valid()) {
error = new Error('Invalid Adapter');
error.code = 404;
throw error;
}
} catch (err) {
self.taskqueue.fail(err);
}
}());
if (error) {
return reject(error); // constructor error, see above
}
self.adapter = opts.adapter;
// needs access to PouchDB;
self.replicate = {};
self.replicate.from = function (url, opts, callback) {
return self.constructor.replicate(url, self, opts, callback);
};
self.replicate.to = function (url, opts, callback) {
return self.constructor.replicate(self, url, opts, callback);
};
self.sync = function (dbName, opts, callback) {
return self.constructor.sync(self, dbName, opts, callback);
};
self.replicate.sync = self.sync;
PouchDB.adapters[opts.adapter].call(self, opts, function (err) {
/* istanbul ignore if */
if (err) {
self.taskqueue.fail(err);
callback(err);
return;
}
prepareForDestruction(self, opts);
self.emit('created', self);
PouchDB.emit('created', opts.originalName);
self.taskqueue.ready(self);
callback(null, self);
});
});
promise.then(function (resp) {
oldCB(null, resp);
}, oldCB);
self.then = promise.then.bind(promise);
self.catch = promise.catch.bind(promise);
}
PouchDB.debug = debug;
// in Node of course this is false
function hasLocalStorage() {
return false;
}
PouchDB.adapters = {};
PouchDB.preferredAdapters = [];
PouchDB.prefix = '_pouch_';
var eventEmitter = new events.EventEmitter();
function setUpEventEmitter(Pouch) {
Object.keys(events.EventEmitter.prototype).forEach(function (key) {
if (typeof events.EventEmitter.prototype[key] === 'function') {
Pouch[key] = eventEmitter[key].bind(eventEmitter);
}
});
// these are created in constructor.js, and allow us to notify each DB with
// the same name that it was destroyed, via the constructor object
var destructListeners = Pouch._destructionListeners = new pouchdbCollections.Map();
Pouch.on('destroyed', function onConstructorDestroyed(name) {
if (!destructListeners.has(name)) {
return;
}
destructListeners.get(name).forEach(function (callback) {
callback();
});
destructListeners.delete(name);
});
}
setUpEventEmitter(PouchDB);
PouchDB.parseAdapter = function (name, opts) {
var match = name.match(/([a-z\-]*):\/\/(.*)/);
var adapter, adapterName;
if (match) {
// the http adapter expects the fully qualified name
name = /http(s?)/.test(match[1]) ? match[1] + '://' + match[2] : match[2];
adapter = match[1];
/* istanbul ignore if */
if (!PouchDB.adapters[adapter].valid()) {
throw 'Invalid adapter';
}
return {name: name, adapter: match[1]};
}
// check for browsers that have been upgraded from websql-only to websql+idb
var skipIdb = 'idb' in PouchDB.adapters && 'websql' in PouchDB.adapters &&
hasLocalStorage() &&
localStorage['_pouch__websqldb_' + PouchDB.prefix + name];
if (opts.adapter) {
adapterName = opts.adapter;
} else if (typeof opts !== 'undefined' && opts.db) {
adapterName = 'leveldb';
} else { // automatically determine adapter
for (var i = 0; i < PouchDB.preferredAdapters.length; ++i) {
adapterName = PouchDB.preferredAdapters[i];
if (adapterName in PouchDB.adapters) {
/* istanbul ignore if */
if (skipIdb && adapterName === 'idb') {
// log it, because this can be confusing during development
console.log('PouchDB is downgrading "' + name + '" to WebSQL to' +
' avoid data loss, because it was already opened with WebSQL.');
continue; // keep using websql to avoid user data loss
}
break;
}
}
}
adapter = PouchDB.adapters[adapterName];
// if adapter is invalid, then an error will be thrown later
var usePrefix = (adapter && 'use_prefix' in adapter) ?
adapter.use_prefix : true;
return {
name: usePrefix ? (PouchDB.prefix + name) : name,
adapter: adapterName
};
};
PouchDB.adapter = function (id, obj, addToPreferredAdapters) {
if (obj.valid()) {
PouchDB.adapters[id] = obj;
if (addToPreferredAdapters) {
PouchDB.preferredAdapters.push(id);
}
}
};
PouchDB.plugin = function (obj) {
Object.keys(obj).forEach(function (id) {
PouchDB.prototype[id] = obj[id];
});
return PouchDB;
};
PouchDB.defaults = function (defaultOpts) {
function PouchAlt(name, opts, callback) {
if (!(this instanceof PouchAlt)) {
return new PouchAlt(name, opts, callback);
}
if (typeof opts === 'function' || typeof opts === 'undefined') {
callback = opts;
opts = {};
}
if (name && typeof name === 'object') {
opts = name;
name = undefined;
}
opts = jsExtend.extend({}, defaultOpts, opts);
PouchDB.call(this, name, opts, callback);
}
inherits(PouchAlt, PouchDB);
setUpEventEmitter(PouchAlt);
PouchAlt.preferredAdapters = PouchDB.preferredAdapters.slice();
Object.keys(PouchDB).forEach(function (key) {
if (!(key in PouchAlt)) {
PouchAlt[key] = PouchDB[key];
}
});
return PouchAlt;
};
// May seem redundant, but this is to allow switching with
// request-browser.js.
var request = require('request');
// non-standard, but we do this to mimic blobs in the browser
function applyTypeToBuffer(buffer, resp) {
buffer.type = resp.headers['content-type'];
}
//this solely exists so we can exclude it in browserify
var buffer = Buffer;
function defaultBody() {
return new buffer('', 'binary');
}
function ajaxCore(options, callback) {
options = clone(options);
var defaultOptions = {
method : "GET",
headers: {},
json: true,
processData: true,
timeout: 10000,
cache: false
};
options = jsExtend.extend(defaultOptions, options);
function onSuccess(obj, resp, cb) {
if (!options.binary && options.json && typeof obj === 'string') {
try {
obj = JSON.parse(obj);
} catch (e) {
// Probably a malformed JSON from server
return cb(e);
}
}
if (Array.isArray(obj)) {
obj = obj.map(function (v) {
if (v.error || v.missing) {
return generateErrorFromResponse(v);
} else {
return v;
}
});
}
if (options.binary) {
applyTypeToBuffer(obj, resp);
}
cb(null, obj, resp);
}
function onError(err, cb) {
var errParsed, errObj;
if (err.code && err.status) {
var err2 = new Error(err.message || err.code);
err2.status = err.status;
return cb(err2);
}
if (err.message && err.message === 'ETIMEDOUT') {
return cb(err);
}
// We always get code && status in node
/* istanbul ignore next */
try {
errParsed = JSON.parse(err.responseText);
//would prefer not to have a try/catch clause
errObj = generateErrorFromResponse(errParsed);
} catch (e) {
errObj = generateErrorFromResponse(err);
}
/* istanbul ignore next */
cb(errObj);
}
if (options.json) {
if (!options.binary) {
options.headers.Accept = 'application/json';
}
options.headers['Content-Type'] = options.headers['Content-Type'] ||
'application/json';
}
if (options.binary) {
options.encoding = null;
options.json = false;
}
if (!options.processData) {
options.json = false;
}
return request(options, function (err, response, body) {
if (err) {
err.status = response ? response.statusCode : 400;
return onError(err, callback);
}
var error;
var content_type = response.headers && response.headers['content-type'];
var data = body || defaultBody();
// CouchDB doesn't always return the right content-type for JSON data, so
// we check for ^{ and }$ (ignoring leading/trailing whitespace)
if (!options.binary && (options.json || !options.processData) &&
typeof data !== 'object' &&
(/json/.test(content_type) ||
(/^[\s]*\{/.test(data) && /\}[\s]*$/.test(data)))) {
try {
data = JSON.parse(data.toString());
} catch (e) {}
}
if (response.statusCode >= 200 && response.statusCode < 300) {
onSuccess(data, response, callback);
} else {
error = generateErrorFromResponse(data);
error.status = response.statusCode;
callback(error);
}
});
}
function ajax(opts, callback) {
// do nothing; all the action is in prerequest-browser.js
return ajaxCore(opts, callback);
}
// originally parseUri 1.2.2, now patched by us
// (c) Steven Levithan <stevenlevithan.com>
// MIT License
var keys = ["source", "protocol", "authority", "userInfo", "user", "password",
"host", "port", "relative", "path", "directory", "file", "query", "anchor"];
var qName ="queryKey";
var qParser = /(?:^|&)([^&=]*)=?([^&]*)/g;
// use the "loose" parser
/* jshint maxlen: false */
var parser = /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
function parseUri(str) {
var m = parser.exec(str);
var uri = {};
var i = 14;
while (i--) {
var key = keys[i];
var value = m[i] || "";
var encoded = ['user', 'password'].indexOf(key) !== -1;
uri[key] = encoded ? decodeURIComponent(value) : value;
}
uri[qName] = {};
uri[keys[12]].replace(qParser, function ($0, $1, $2) {
if ($1) {
uri[qName][$1] = $2;
}
});
return uri;
}
function atob(str) {
var base64 = new buffer(str, 'base64');
// Node.js will just skip the characters it can't decode instead of
// throwing an exception
if (base64.toString('base64') !== str) {
throw new Error("attachment is not a valid base64 string");
}
return base64.toString('binary');
}
function btoa(str) {
return new buffer(str, 'binary').toString('base64');
}
function typedBuffer(binString, buffType, type) {
// buffType is either 'binary' or 'base64'
var buff = new buffer(binString, buffType);
buff.type = type; // non-standard, but used for consistency with the browser
return buff;
}
function binStringToBluffer(binString, type) {
return typedBuffer(binString, 'binary', type);
}
var extend$1 = jsExtend__default.extend;
var utils = {
ajax: ajax,
parseUri: parseUri,
uuid: uuid,
Promise: PouchPromise,
atob: atob,
btoa: btoa,
binaryStringToBlobOrBuffer: binStringToBluffer,
clone: clone,
extend: extend$1,
createError: createError
};
function tryFilter(filter, doc, req) {
try {
return !filter(doc, req);
} catch (err) {
var msg = 'Filter function threw: ' + err.toString();
return createError(BAD_REQUEST, msg);
}
}
function filterChange(opts) {
var req = {};
var hasFilter = opts.filter && typeof opts.filter === 'function';
req.query = opts.query_params;
return function filter(change) {
if (!change.doc) {
// CSG sends events on the changes feed that don't have documents,
// this hack makes a whole lot of existing code robust.
change.doc = {};
}
var filterReturn = hasFilter && tryFilter(opts.filter, change.doc, req);
if (typeof filterReturn === 'object') {
return filterReturn;
}
if (filterReturn) {
return false;
}
if (!opts.include_docs) {
delete change.doc;
} else if (!opts.attachments) {
for (var att in change.doc._attachments) {
/* istanbul ignore else */
if (change.doc._attachments.hasOwnProperty(att)) {
change.doc._attachments[att].stub = true;
}
}
}
return true;
};
}
// We assume Node users don't need to see this warning
var res = function () {};
var collate$1 = pouchCollate__default.collate;
var CHECKPOINT_VERSION = 1;
var REPLICATOR = "pouchdb";
// This is an arbitrary number to limit the
// amount of replication history we save in the checkpoint.
// If we save too much, the checkpoing docs will become very big,
// if we save fewer, we'll run a greater risk of having to
// read all the changes from 0 when checkpoint PUTs fail
// CouchDB 2.0 has a more involved history pruning,
// but let's go for the simple version for now.
var CHECKPOINT_HISTORY_SIZE = 5;
var LOWEST_SEQ = 0;
function updateCheckpoint(db, id, checkpoint, session, returnValue) {
return db.get(id).catch(function (err) {
if (err.status === 404) {
if (db.type() === 'http') {
res(
404, 'PouchDB is just checking if a remote checkpoint exists.'
);
}
return {
session_id: session,
_id: id,
history: [],
replicator: REPLICATOR,
version: CHECKPOINT_VERSION
};
}
throw err;
}).then(function (doc) {
if (returnValue.cancelled) {
return;
}
// Filter out current entry for this replication
doc.history = (doc.history || []).filter(function (item) {
return item.session_id !== session;
});
// Add the latest checkpoint to history
doc.history.unshift({
last_seq: checkpoint,
session_id: session
});
// Just take the last pieces in history, to
// avoid really big checkpoint docs.
// see comment on history size above
doc.history = doc.history.slice(0, CHECKPOINT_HISTORY_SIZE);
doc.version = CHECKPOINT_VERSION;
doc.replicator = REPLICATOR;
doc.session_id = session;
doc.last_seq = checkpoint;
return db.put(doc).catch(function (err) {
if (err.status === 409) {
// retry; someone is trying to write a checkpoint simultaneously
return updateCheckpoint(db, id, checkpoint, session, returnValue);
}
throw err;
});
});
}
function Checkpointer(src, target, id, returnValue) {
this.src = src;
this.target = target;
this.id = id;
this.returnValue = returnValue;
}
Checkpointer.prototype.writeCheckpoint = function (checkpoint, session) {
var self = this;
return this.updateTarget(checkpoint, session).then(function () {
return self.updateSource(checkpoint, session);
});
};
Checkpointer.prototype.updateTarget = function (checkpoint, session) {
return updateCheckpoint(this.target, this.id, checkpoint,
session, this.returnValue);
};
Checkpointer.prototype.updateSource = function (checkpoint, session) {
var self = this;
if (this.readOnlySource) {
return PouchPromise.resolve(true);
}
return updateCheckpoint(this.src, this.id, checkpoint,
session, this.returnValue)
.catch(function (err) {
if (isForbiddenError(err)) {
self.readOnlySource = true;
return true;
}
throw err;
});
};
var comparisons = {
"undefined": function (targetDoc, sourceDoc) {
// This is the previous comparison function
if (collate$1(targetDoc.last_seq, sourceDoc.last_seq) === 0) {
return sourceDoc.last_seq;
}
/* istanbul ignore next */
return 0;
},
"1": function (targetDoc, sourceDoc) {
// This is the comparison function ported from CouchDB
return compareReplicationLogs(sourceDoc, targetDoc).last_seq;
}
};
Checkpointer.prototype.getCheckpoint = function () {
var self = this;
return self.target.get(self.id).then(function (targetDoc) {
if (self.readOnlySource) {
return PouchPromise.resolve(targetDoc.last_seq);
}
return self.src.get(self.id).then(function (sourceDoc) {
// Since we can't migrate an old version doc to a new one
// (no session id), we just go with the lowest seq in this case
/* istanbul ignore if */
if (targetDoc.version !== sourceDoc.version) {
return LOWEST_SEQ;
}
var version;
if (targetDoc.version) {
version = targetDoc.version.toString();
} else {
version = "undefined";
}
if (version in comparisons) {
return comparisons[version](targetDoc, sourceDoc);
}
/* istanbul ignore next */
return LOWEST_SEQ;
}, function (err) {
if (err.status === 404 && targetDoc.last_seq) {
return self.src.put({
_id: self.id,
last_seq: LOWEST_SEQ
}).then(function () {
return LOWEST_SEQ;
}, function (err) {
if (isForbiddenError(err)) {
self.readOnlySource = true;
return targetDoc.last_seq;
}
/* istanbul ignore next */
return LOWEST_SEQ;
});
}
throw err;
});
}).catch(function (err) {
if (err.status !== 404) {
throw err;
}
return LOWEST_SEQ;
});
};
// This checkpoint comparison is ported from CouchDBs source
// they come from here:
// https://github.com/apache/couchdb-couch-replicator/blob/master/src/couch_replicator.erl#L863-L906
function compareReplicationLogs(srcDoc, tgtDoc) {
if (srcDoc.session_id === tgtDoc.session_id) {
return {
last_seq: srcDoc.last_seq,
history: srcDoc.history || []
};
}
var sourceHistory = srcDoc.history || [];
var targetHistory = tgtDoc.history || [];
return compareReplicationHistory(sourceHistory, targetHistory);
}
function compareReplicationHistory(sourceHistory, targetHistory) {
// the erlang loop via function arguments is not so easy to repeat in JS
// therefore, doing this as recursion
var S = sourceHistory[0];
var sourceRest = sourceHistory.slice(1);
var T = targetHistory[0];
var targetRest = targetHistory.slice(1);
if (!S || targetHistory.length === 0) {
return {
last_seq: LOWEST_SEQ,
history: []
};
}
var sourceId = S.session_id;
/* istanbul ignore if */
if (hasSessionId(sourceId, targetHistory)) {
return {
last_seq: S.last_seq,
history: sourceHistory
};
}
var targetId = T.session_id;
if (hasSessionId(targetId, sourceRest)) {
return {
last_seq: T.last_seq,
history: targetRest
};
}
return compareReplicationHistory(sourceRest, targetRest);
}
function hasSessionId(sessionId, history) {
var props = history[0];
var rest = history.slice(1);
if (!sessionId || history.length === 0) {
return false;
}
if (sessionId === props.session_id) {
return true;
}
return hasSessionId(sessionId, rest);
}
function isForbiddenError(err) {
return typeof err.status === 'number' && Math.floor(err.status / 100) === 4;
}
var STARTING_BACK_OFF = 0;
function randomNumber(min, max) {
min = parseInt(min, 10) || 0;
max = parseInt(max, 10);
if (max !== max || max <= min) {
max = (min || 1) << 1; //doubling
} else {
max = max + 1;
}
var ratio = Math.random();
var range = max - min;
return ~~(range * ratio + min); // ~~ coerces to an int, but fast.
}
function defaultBackOff(min) {
var max = 0;
if (!min) {
max = 2000;
}
return randomNumber(min, max);
}
function backOff(opts, returnValue, error, callback) {
if (opts.retry === false) {
returnValue.emit('error', error);
returnValue.removeAllListeners();
return;
}
if (typeof opts.back_off_function !== 'function') {
opts.back_off_function = defaultBackOff;
}
returnValue.emit('requestError', error);
if (returnValue.state === 'active' || returnValue.state === 'pending') {
returnValue.emit('paused', error);
returnValue.state = 'stopped';
returnValue.once('active', function () {
opts.current_back_off = STARTING_BACK_OFF;
});
}
opts.current_back_off = opts.current_back_off || STARTING_BACK_OFF;
opts.current_back_off = opts.back_off_function(opts.current_back_off);
setTimeout(callback, opts.current_back_off);
}
var res$1 = toPromise(function (data, callback) {
var base64 = crypto.createHash('md5').update(data).digest('base64');
callback(null, base64);
});
function sortObjectPropertiesByKey(queryParams) {
return Object.keys(queryParams).sort(pouchCollate.collate).reduce(function (result, key) {
result[key] = queryParams[key];
return result;
}, {});
}
// Generate a unique id particular to this replication.
// Not guaranteed to align perfectly with CouchDB's rep ids.
function generateReplicationId(src, target, opts) {
var docIds = opts.doc_ids ? opts.doc_ids.sort(pouchCollate.collate) : '';
var filterFun = opts.filter ? opts.filter.toString() : '';
var queryParams = '';
var filterViewName = '';
if (opts.filter && opts.query_params) {
queryParams = JSON.stringify(sortObjectPropertiesByKey(opts.query_params));
}
if (opts.filter && opts.filter === '_view') {
filterViewName = opts.view.toString();
}
return PouchPromise.all([src.id(), target.id()]).then(function (res) {
var queryData = res[0] + res[1] + filterFun + filterViewName +
queryParams + docIds;
return res$1(queryData);
}).then(function (md5sum) {
// can't use straight-up md5 alphabet, because
// the char '/' is interpreted as being for attachments,
// and + is also not url-safe
md5sum = md5sum.replace(/\//g, '.').replace(/\+/g, '_');
return '_local/' + md5sum;
});
}
function isGenOne(rev) {
return /^1-/.test(rev);
}
function createBulkGetOpts(diffs) {
var requests = [];
Object.keys(diffs).forEach(function (id) {
var missingRevs = diffs[id].missing;
missingRevs.forEach(function (missingRev) {
requests.push({
id: id,
rev: missingRev
});
});
});
return {
docs: requests,
revs: true,
attachments: true,
binary: true
};
}
//
// Fetch all the documents from the src as described in the "diffs",
// which is a mapping of docs IDs to revisions. If the state ever
// changes to "cancelled", then the returned promise will be rejected.
// Else it will be resolved with a list of fetched documents.
//
function getDocs(src, diffs, state) {
diffs = clone(diffs); // we do not need to modify this
var resultDocs = [],
ok = true;
function getAllDocs() {
var bulkGetOpts = createBulkGetOpts(diffs);
if (!bulkGetOpts.docs.length) { // optimization: skip empty requests
return;
}
return src.bulkGet(bulkGetOpts).then(function (bulkGetResponse) {
/* istanbul ignore if */
if (state.cancelled) {
throw new Error('cancelled');
}
bulkGetResponse.results.forEach(function (bulkGetInfo) {
bulkGetInfo.docs.forEach(function (doc) {
if (doc.ok) {
resultDocs.push(doc.ok);
} else if (doc.error !== undefined) {
ok = false;
}
// else: when AUTO_COMPACTION is set, docs can be returned which look
// like this: {"missing":"1-7c3ac256b693c462af8442f992b83696"}
});
});
});
}
function hasAttachments(doc) {
return doc._attachments && Object.keys(doc._attachments).length > 0;
}
function fetchRevisionOneDocs(ids) {
// Optimization: fetch gen-1 docs and attachments in
// a single request using _all_docs
return src.allDocs({
keys: ids,
include_docs: true
}).then(function (res) {
if (state.cancelled) {
throw new Error('cancelled');
}
res.rows.forEach(function (row) {
if (row.deleted || !row.doc || !isGenOne(row.value.rev) ||
hasAttachments(row.doc)) {
// if any of these conditions apply, we need to fetch using get()
return;
}
// the doc we got back from allDocs() is sufficient
resultDocs.push(row.doc);
delete diffs[row.id];
});
});
}
function getRevisionOneDocs() {
// filter out the generation 1 docs and get them
// leaving the non-generation one docs to be got otherwise
var ids = Object.keys(diffs).filter(function (id) {
var missing = diffs[id].missing;
return missing.length === 1 && isGenOne(missing[0]);
});
if (ids.length > 0) {
return fetchRevisionOneDocs(ids);
}
}
function returnResult() {
return { ok:ok, docs:resultDocs };
}
return PouchPromise.resolve()
.then(getRevisionOneDocs)
.then(getAllDocs)
.then(returnResult);
}
function replicate(src, target, opts, returnValue, result) {
var batches = []; // list of batches to be processed
var currentBatch; // the batch currently being processed
var pendingBatch = {
seq: 0,
changes: [],
docs: []
}; // next batch, not yet ready to be processed
var writingCheckpoint = false; // true while checkpoint is being written
var changesCompleted = false; // true when all changes received
var replicationCompleted = false; // true when replication has completed
var last_seq = 0;
var continuous = opts.continuous || opts.live || false;
var batch_size = opts.batch_size || 100;
var batches_limit = opts.batches_limit || 10;
var changesPending = false; // true while src.changes is running
var doc_ids = opts.doc_ids;
var repId;
var checkpointer;
var allErrors = [];
var changedDocs = [];
// Like couchdb, every replication gets a unique session id
var session = uuid();
result = result || {
ok: true,
start_time: new Date(),
docs_read: 0,
docs_written: 0,
doc_write_failures: 0,
errors: []
};
var changesOpts = {};
returnValue.ready(src, target);
function initCheckpointer() {
if (checkpointer) {
return PouchPromise.resolve();
}
return generateReplicationId(src, target, opts).then(function (res) {
repId = res;
checkpointer = new Checkpointer(src, target, repId, returnValue);
});
}
function writeDocs() {
changedDocs = [];
if (currentBatch.docs.length === 0) {
return;
}
var docs = currentBatch.docs;
return target.bulkDocs({docs: docs, new_edits: false}).then(function (res) {
if (returnValue.cancelled) {
completeReplication();
throw new Error('cancelled');
}
var errors = [];
var errorsById = {};
res.forEach(function (res) {
if (res.error) {
result.doc_write_failures++;
errors.push(res);
errorsById[res.id] = res;
}
});
allErrors = allErrors.concat(errors);
result.docs_written += currentBatch.docs.length - errors.length;
var non403s = errors.filter(function (error) {
return error.name !== 'unauthorized' && error.name !== 'forbidden';
});
docs.forEach(function (doc) {
var error = errorsById[doc._id];
if (error) {
returnValue.emit('denied', clone(error));
} else {
changedDocs.push(doc);
}
});
if (non403s.length > 0) {
var error = new Error('bulkDocs error');
error.other_errors = errors;
abortReplication('target.bulkDocs failed to write docs', error);
throw new Error('bulkWrite partial failure');
}
}, function (err) {
result.doc_write_failures += docs.length;
throw err;
});
}
function finishBatch() {
if (currentBatch.error) {
throw new Error('There was a problem getting docs.');
}
result.last_seq = last_seq = currentBatch.seq;
var outResult = clone(result);
if (changedDocs.length) {
outResult.docs = changedDocs;
returnValue.emit('change', outResult);
}
writingCheckpoint = true;
return checkpointer.writeCheckpoint(currentBatch.seq,
session).then(function () {
writingCheckpoint = false;
if (returnValue.cancelled) {
completeReplication();
throw new Error('cancelled');
}
currentBatch = undefined;
getChanges();
}).catch(function (err) {
writingCheckpoint = false;
abortReplication('writeCheckpoint completed with error', err);
throw err;
});
}
function getDiffs() {
var diff = {};
currentBatch.changes.forEach(function (change) {
// Couchbase Sync Gateway emits these, but we can ignore them
/* istanbul ignore if */
if (change.id === "_user/") {
return;
}
diff[change.id] = change.changes.map(function (x) {
return x.rev;
});
});
return target.revsDiff(diff).then(function (diffs) {
if (returnValue.cancelled) {
completeReplication();
throw new Error('cancelled');
}
// currentBatch.diffs elements are deleted as the documents are written
currentBatch.diffs = diffs;
});
}
function getBatchDocs() {
return getDocs(src, currentBatch.diffs, returnValue).then(function (got) {
currentBatch.error = !got.ok;
got.docs.forEach(function (doc) {
delete currentBatch.diffs[doc._id];
result.docs_read++;
currentBatch.docs.push(doc);
});
});
}
function startNextBatch() {
if (returnValue.cancelled || currentBatch) {
return;
}
if (batches.length === 0) {
processPendingBatch(true);
return;
}
currentBatch = batches.shift();
getDiffs()
.then(getBatchDocs)
.then(writeDocs)
.then(finishBatch)
.then(startNextBatch)
.catch(function (err) {
abortReplication('batch processing terminated with error', err);
});
}
function processPendingBatch(immediate) {
if (pendingBatch.changes.length === 0) {
if (batches.length === 0 && !currentBatch) {
if ((continuous && changesOpts.live) || changesCompleted) {
returnValue.state = 'pending';
returnValue.emit('paused');
}
if (changesCompleted) {
completeReplication();
}
}
return;
}
if (
immediate ||
changesCompleted ||
pendingBatch.changes.length >= batch_size
) {
batches.push(pendingBatch);
pendingBatch = {
seq: 0,
changes: [],
docs: []
};
if (returnValue.state === 'pending' || returnValue.state === 'stopped') {
returnValue.state = 'active';
returnValue.emit('active');
}
startNextBatch();
}
}
function abortReplication(reason, err) {
if (replicationCompleted) {
return;
}
if (!err.message) {
err.message = reason;
}
result.ok = false;
result.status = 'aborting';
result.errors.push(err);
allErrors = allErrors.concat(err);
batches = [];
pendingBatch = {
seq: 0,
changes: [],
docs: []
};
completeReplication();
}
function completeReplication() {
if (replicationCompleted) {
return;
}
if (returnValue.cancelled) {
result.status = 'cancelled';
if (writingCheckpoint) {
return;
}
}
result.status = result.status || 'complete';
result.end_time = new Date();
result.last_seq = last_seq;
replicationCompleted = true;
var non403s = allErrors.filter(function (error) {
return error.name !== 'unauthorized' && error.name !== 'forbidden';
});
if (non403s.length > 0) {
var error = allErrors.pop();
if (allErrors.length > 0) {
error.other_errors = allErrors;
}
error.result = result;
backOff(opts, returnValue, error, function () {
replicate(src, target, opts, returnValue);
});
} else {
result.errors = allErrors;
returnValue.emit('complete', result);
returnValue.removeAllListeners();
}
}
function onChange(change) {
if (returnValue.cancelled) {
return completeReplication();
}
var filter = filterChange(opts)(change);
if (!filter) {
return;
}
pendingBatch.seq = change.seq;
pendingBatch.changes.push(change);
processPendingBatch(changesOpts.live);
}
function onChangesComplete(changes) {
changesPending = false;
if (returnValue.cancelled) {
return completeReplication();
}
// if no results were returned then we're done,
// else fetch more
if (changes.results.length > 0) {
changesOpts.since = changes.last_seq;
getChanges();
} else {
if (continuous) {
changesOpts.live = true;
getChanges();
} else {
changesCompleted = true;
}
}
processPendingBatch(true);
}
function onChangesError(err) {
changesPending = false;
/* istanbul ignore if */
if (returnValue.cancelled) {
return completeReplication();
}
abortReplication('changes rejected', err);
}
function getChanges() {
if (!(
!changesPending &&
!changesCompleted &&
batches.length < batches_limit
)) {
return;
}
changesPending = true;
function abortChanges() {
changes.cancel();
}
function removeListener() {
returnValue.removeListener('cancel', abortChanges);
}
if (returnValue._changes) { // remove old changes() and listeners
returnValue.removeListener('cancel', returnValue._abortChanges);
returnValue._changes.cancel();
}
returnValue.once('cancel', abortChanges);
var changes = src.changes(changesOpts)
.on('change', onChange);
changes.then(removeListener, removeListener);
changes.then(onChangesComplete)
.catch(onChangesError);
if (opts.retry) {
// save for later so we can cancel if necessary
returnValue._changes = changes;
returnValue._abortChanges = abortChanges;
}
}
function startChanges() {
initCheckpointer().then(function () {
if (returnValue.cancelled) {
completeReplication();
return;
}
return checkpointer.getCheckpoint().then(function (checkpoint) {
last_seq = checkpoint;
changesOpts = {
since: last_seq,
limit: batch_size,
batch_size: batch_size,
style: 'all_docs',
doc_ids: doc_ids,
return_docs: true // required so we know when we're done
};
if (opts.filter) {
if (typeof opts.filter !== 'string') {
// required for the client-side filter in onChange
changesOpts.include_docs = true;
} else { // ddoc filter
changesOpts.filter = opts.filter;
}
}
if ('heartbeat' in opts) {
changesOpts.heartbeat = opts.heartbeat;
}
if ('timeout' in opts) {
changesOpts.timeout = opts.timeout;
}
if (opts.query_params) {
changesOpts.query_params = opts.query_params;
}
if (opts.view) {
changesOpts.view = opts.view;
}
getChanges();
});
}).catch(function (err) {
abortReplication('getCheckpoint rejected with ', err);
});
}
/* istanbul ignore next */
function onCheckpointError(err) {
writingCheckpoint = false;
abortReplication('writeCheckpoint completed with error', err);
throw err;
}
/* istanbul ignore if */
if (returnValue.cancelled) { // cancelled immediately
completeReplication();
return;
}
if (!returnValue._addedListeners) {
returnValue.once('cancel', completeReplication);
if (typeof opts.complete === 'function') {
returnValue.once('error', opts.complete);
returnValue.once('complete', function (result) {
opts.complete(null, result);
});
}
returnValue._addedListeners = true;
}
if (typeof opts.since === 'undefined') {
startChanges();
} else {
initCheckpointer().then(function () {
writingCheckpoint = true;
return checkpointer.writeCheckpoint(opts.since, session);
}).then(function () {
writingCheckpoint = false;
/* istanbul ignore if */
if (returnValue.cancelled) {
completeReplication();
return;
}
last_seq = opts.since;
startChanges();
}).catch(onCheckpointError);
}
}
// We create a basic promise so the caller can cancel the replication possibly
// before we have actually started listening to changes etc
inherits(Replication, events.EventEmitter);
function Replication() {
events.EventEmitter.call(this);
this.cancelled = false;
this.state = 'pending';
var self = this;
var promise = new PouchPromise(function (fulfill, reject) {
self.once('complete', fulfill);
self.once('error', reject);
});
self.then = function (resolve, reject) {
return promise.then(resolve, reject);
};
self.catch = function (reject) {
return promise.catch(reject);
};
// As we allow error handling via "error" event as well,
// put a stub in here so that rejecting never throws UnhandledError.
self.catch(function () {});
}
Replication.prototype.cancel = function () {
this.cancelled = true;
this.state = 'cancelled';
this.emit('cancel');
};
Replication.prototype.ready = function (src, target) {
var self = this;
if (self._readyCalled) {
return;
}
self._readyCalled = true;
function onDestroy() {
self.cancel();
}
src.once('destroyed', onDestroy);
target.once('destroyed', onDestroy);
function cleanup() {
src.removeListener('destroyed', onDestroy);
target.removeListener('destroyed', onDestroy);
}
self.once('complete', cleanup);
};
function toPouch(db, opts) {
var PouchConstructor = opts.PouchConstructor;
if (typeof db === 'string') {
return new PouchConstructor(db, opts);
} else {
return db;
}
}
function replicateWrapper(src, target, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (typeof opts === 'undefined') {
opts = {};
}
if (opts.doc_ids && !Array.isArray(opts.doc_ids)) {
throw createError(BAD_REQUEST,
"`doc_ids` filter parameter is not a list.");
}
opts.complete = callback;
opts = clone(opts);
opts.continuous = opts.continuous || opts.live;
opts.retry = ('retry' in opts) ? opts.retry : false;
/*jshint validthis:true */
opts.PouchConstructor = opts.PouchConstructor || this;
var replicateRet = new Replication(opts);
var srcPouch = toPouch(src, opts);
var targetPouch = toPouch(target, opts);
replicate(srcPouch, targetPouch, opts, replicateRet);
return replicateRet;
}
var replication = {
replicate: replicateWrapper,
toPouch: toPouch
};
var replicate$1 = replication.replicate;
inherits(Sync, events.EventEmitter);
function sync(src, target, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (typeof opts === 'undefined') {
opts = {};
}
opts = clone(opts);
/*jshint validthis:true */
opts.PouchConstructor = opts.PouchConstructor || this;
src = replication.toPouch(src, opts);
target = replication.toPouch(target, opts);
return new Sync(src, target, opts, callback);
}
function Sync(src, target, opts, callback) {
var self = this;
this.canceled = false;
var optsPush = opts.push ? jsExtend.extend({}, opts, opts.push) : opts;
var optsPull = opts.pull ? jsExtend.extend({}, opts, opts.pull) : opts;
this.push = replicate$1(src, target, optsPush);
this.pull = replicate$1(target, src, optsPull);
this.pushPaused = true;
this.pullPaused = true;
function pullChange(change) {
self.emit('change', {
direction: 'pull',
change: change
});
}
function pushChange(change) {
self.emit('change', {
direction: 'push',
change: change
});
}
function pushDenied(doc) {
self.emit('denied', {
direction: 'push',
doc: doc
});
}
function pullDenied(doc) {
self.emit('denied', {
direction: 'pull',
doc: doc
});
}
function pushPaused() {
self.pushPaused = true;
if (self.pullPaused) {
self.emit('paused');
}
}
function pullPaused() {
self.pullPaused = true;
if (self.pushPaused) {
self.emit('paused');
}
}
function pushActive() {
self.pushPaused = false;
if (self.pullPaused) {
self.emit('active', {
direction: 'push'
});
}
}
function pullActive() {
self.pullPaused = false;
/* istanbul ignore if */
if (self.pushPaused) {
self.emit('active', {
direction: 'pull'
});
}
}
var removed = {};
function removeAll(type) { // type is 'push' or 'pull'
return function (event, func) {
var isChange = event === 'change' &&
(func === pullChange || func === pushChange);
var isDenied = event === 'denied' &&
(func === pullDenied || func === pushDenied);
var isPaused = event === 'paused' &&
(func === pullPaused || func === pushPaused);
var isActive = event === 'active' &&
(func === pullActive || func === pushActive);
if (isChange || isDenied || isPaused || isActive) {
if (!(event in removed)) {
removed[event] = {};
}
removed[event][type] = true;
if (Object.keys(removed[event]).length === 2) {
// both push and pull have asked to be removed
self.removeAllListeners(event);
}
}
};
}
if (opts.live) {
this.push.on('complete', self.pull.cancel.bind(self.pull));
this.pull.on('complete', self.push.cancel.bind(self.push));
}
this.on('newListener', function (event) {
if (event === 'change') {
self.pull.on('change', pullChange);
self.push.on('change', pushChange);
} else if (event === 'denied') {
self.pull.on('denied', pullDenied);
self.push.on('denied', pushDenied);
} else if (event === 'active') {
self.pull.on('active', pullActive);
self.push.on('active', pushActive);
} else if (event === 'paused') {
self.pull.on('paused', pullPaused);
self.push.on('paused', pushPaused);
}
});
this.on('removeListener', function (event) {
if (event === 'change') {
self.pull.removeListener('change', pullChange);
self.push.removeListener('change', pushChange);
} else if (event === 'denied') {
self.pull.removeListener('denied', pullDenied);
self.push.removeListener('denied', pushDenied);
} else if (event === 'active') {
self.pull.removeListener('active', pullActive);
self.push.removeListener('active', pushActive);
} else if (event === 'paused') {
self.pull.removeListener('paused', pullPaused);
self.push.removeListener('paused', pushPaused);
}
});
this.pull.on('removeListener', removeAll('pull'));
this.push.on('removeListener', removeAll('push'));
var promise = PouchPromise.all([
this.push,
this.pull
]).then(function (resp) {
var out = {
push: resp[0],
pull: resp[1]
};
self.emit('complete', out);
if (callback) {
callback(null, out);
}
self.removeAllListeners();
return out;
}, function (err) {
self.cancel();
if (callback) {
// if there's a callback, then the callback can receive
// the error event
callback(err);
} else {
// if there's no callback, then we're safe to emit an error
// event, which would otherwise throw an unhandled error
// due to 'error' being a special event in EventEmitters
self.emit('error', err);
}
self.removeAllListeners();
if (callback) {
// no sense throwing if we're already emitting an 'error' event
throw err;
}
});
this.then = function (success, err) {
return promise.then(success, err);
};
this.catch = function (err) {
return promise.catch(err);
};
}
Sync.prototype.cancel = function () {
if (!this.canceled) {
this.canceled = true;
this.push.cancel();
this.pull.cancel();
}
};
function b64ToBluffer(b64, type) {
return typedBuffer(b64, 'base64', type);
}
function blobToBase64(blobOrBuffer) {
return PouchPromise.resolve(blobOrBuffer.toString('base64'));
}
function flatten(arrs) {
var res = [];
for (var i = 0, len = arrs.length; i < len; i++) {
res = res.concat(arrs[i]);
}
return res;
}
var CHANGES_BATCH_SIZE = 25;
var MAX_SIMULTANEOUS_REVS = 50;
var supportsBulkGetMap = {};
// according to http://stackoverflow.com/a/417184/680742,
// the de facto URL length limit is 2000 characters.
// but since most of our measurements don't take the full
// URL into account, we fudge it a bit.
// TODO: we could measure the full URL to enforce exactly 2000 chars
var MAX_URL_LENGTH = 1800;
var log$1 = debug('pouchdb:http');
function readAttachmentsAsBlobOrBuffer(row) {
var atts = row.doc && row.doc._attachments;
if (!atts) {
return;
}
Object.keys(atts).forEach(function (filename) {
var att = atts[filename];
att.data = b64ToBluffer(att.data, att.content_type);
});
}
function encodeDocId(id) {
if (/^_design/.test(id)) {
return '_design/' + encodeURIComponent(id.slice(8));
}
if (/^_local/.test(id)) {
return '_local/' + encodeURIComponent(id.slice(7));
}
return encodeURIComponent(id);
}
function preprocessAttachments(doc) {
if (!doc._attachments || !Object.keys(doc._attachments)) {
return PouchPromise.resolve();
}
return PouchPromise.all(Object.keys(doc._attachments).map(function (key) {
var attachment = doc._attachments[key];
if (attachment.data && typeof attachment.data !== 'string') {
return blobToBase64(attachment.data).then(function (b64) {
attachment.data = b64;
});
}
}));
}
// Get all the information you possibly can about the URI given by name and
// return it as a suitable object.
function getHost(name) {
// Prase the URI into all its little bits
var uri = parseUri(name);
// Store the user and password as a separate auth object
if (uri.user || uri.password) {
uri.auth = {username: uri.user, password: uri.password};
}
// Split the path part of the URI into parts using '/' as the delimiter
// after removing any leading '/' and any trailing '/'
var parts = uri.path.replace(/(^\/|\/$)/g, '').split('/');
// Store the first part as the database name and remove it from the parts
// array
uri.db = parts.pop();
// Prevent double encoding of URI component
if (uri.db.indexOf('%') === -1) {
uri.db = encodeURIComponent(uri.db);
}
// Restore the path by joining all the remaining parts (all the parts
// except for the database name) with '/'s
uri.path = parts.join('/');
return uri;
}
// Generate a URL with the host data given by opts and the given path
function genDBUrl(opts, path) {
return genUrl(opts, opts.db + '/' + path);
}
// Generate a URL with the host data given by opts and the given path
function genUrl(opts, path) {
// If the host already has a path, then we need to have a path delimiter
// Otherwise, the path delimiter is the empty string
var pathDel = !opts.path ? '' : '/';
// If the host already has a path, then we need to have a path delimiter
// Otherwise, the path delimiter is the empty string
return opts.protocol + '://' + opts.host +
(opts.port ? (':' + opts.port) : '') +
'/' + opts.path + pathDel + path;
}
function paramsToStr(params) {
return '?' + Object.keys(params).map(function (k) {
return k + '=' + encodeURIComponent(params[k]);
}).join('&');
}
// Implements the PouchDB API for dealing with CouchDB instances over HTTP
function HttpPouch(opts, callback) {
// The functions that will be publicly available for HttpPouch
var api = this;
// Parse the URI given by opts.name into an easy-to-use object
var getHostFun = getHost;
// TODO: this seems to only be used by yarong for the Thali project.
// Verify whether or not it's still needed.
/* istanbul ignore if */
if (opts.getHost) {
getHostFun = opts.getHost;
}
var host = getHostFun(opts.name, opts);
var dbUrl = genDBUrl(host, '');
opts = clone(opts);
var ajaxOpts = opts.ajax || {};
api.getUrl = function () { return dbUrl; };
api.getHeaders = function () { return ajaxOpts.headers || {}; };
if (opts.auth || host.auth) {
var nAuth = opts.auth || host.auth;
var str = nAuth.username + ':' + nAuth.password;
var token = btoa(unescape(encodeURIComponent(str)));
ajaxOpts.headers = ajaxOpts.headers || {};
ajaxOpts.headers.Authorization = 'Basic ' + token;
}
function ajax(userOpts, options, callback) {
var reqAjax = userOpts.ajax || {};
var reqOpts = jsExtend.extend(clone(ajaxOpts), reqAjax, options);
log$1(reqOpts.method + ' ' + reqOpts.url);
return utils.ajax(reqOpts, callback);
}
function ajaxPromise(userOpts, opts) {
return new PouchPromise(function (resolve, reject) {
ajax(userOpts, opts, function (err, res$$) {
if (err) {
return reject(err);
}
resolve(res$$);
});
});
}
function adapterFun$$(name, fun) {
return adapterFun(name, getArguments(function (args) {
setup().then(function () {
return fun.apply(this, args);
}).catch(function (e) {
var callback = args.pop();
callback(e);
});
}));
}
var setupPromise;
function setup() {
// TODO: Remove `skipSetup` in favor of `skip_setup` in a future release
if (opts.skipSetup || opts.skip_setup) {
return PouchPromise.resolve();
}
// If there is a setup in process or previous successful setup
// done then we will use that
// If previous setups have been rejected we will try again
if (setupPromise) {
return setupPromise;
}
var checkExists = {method: 'GET', url: dbUrl};
setupPromise = ajaxPromise({}, checkExists).catch(function (err) {
if (err && err.status && err.status === 404) {
// Doesnt exist, create it
res(404, 'PouchDB is just detecting if the remote exists.');
return ajaxPromise({}, {method: 'PUT', url: dbUrl});
} else {
return PouchPromise.reject(err);
}
}).catch(function (err) {
// If we try to create a database that already exists
if (err && err.status && err.status === 412) {
return true;
}
return PouchPromise.reject(err);
});
setupPromise.catch(function () {
setupPromise = null;
});
return setupPromise;
}
setTimeout(function () {
callback(null, api);
});
api.type = function () {
return 'http';
};
api.id = adapterFun$$('id', function (callback) {
ajax({}, {method: 'GET', url: genUrl(host, '')}, function (err, result) {
var uuid = (result && result.uuid) ?
(result.uuid + host.db) : genDBUrl(host, '');
callback(null, uuid);
});
});
api.request = adapterFun$$('request', function (options, callback) {
options.url = genDBUrl(host, options.url);
ajax({}, options, callback);
});
// Sends a POST request to the host calling the couchdb _compact function
// version: The version of CouchDB it is running
api.compact = adapterFun$$('compact', function (opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
opts = clone(opts);
ajax(opts, {
url: genDBUrl(host, '_compact'),
method: 'POST'
}, function () {
function ping() {
api.info(function (err, res$$) {
if (res$$ && !res$$.compact_running) {
callback(null, {ok: true});
} else {
setTimeout(ping, opts.interval || 200);
}
});
}
// Ping the http if it's finished compaction
ping();
});
});
api.bulkGet = adapterFun('bulkGet', function (opts, callback) {
var self = this;
function doBulkGet(cb) {
var params = {};
if (opts.revs) {
params.revs = true;
}
if (opts.attachments) {
params.attachments = true;
}
ajax({}, {
url: genDBUrl(host, '_bulk_get' + paramsToStr(params)),
method: 'POST',
body: { docs: opts.docs}
}, cb);
}
function doBulkGetShim() {
// avoid "url too long error" by splitting up into multiple requests
var batchSize = MAX_SIMULTANEOUS_REVS;
var numBatches = Math.ceil(opts.docs.length / batchSize);
var numDone = 0;
var results = new Array(numBatches);
function onResult(batchNum) {
return function (err, res$$) {
// err is impossible because shim returns a list of errs in that case
results[batchNum] = res$$.results;
if (++numDone === numBatches) {
callback(null, {results: flatten(results)});
}
};
}
for (var i = 0; i < numBatches; i++) {
var subOpts = pick(opts, ['revs', 'attachments']);
subOpts.ajax = ajaxOpts;
subOpts.docs = opts.docs.slice(i * batchSize,
Math.min(opts.docs.length, (i + 1) * batchSize));
bulkGet(self, subOpts, onResult(i));
}
}
// mark the whole database as either supporting or not supporting _bulk_get
var dbUrl = genUrl(host, '');
var supportsBulkGet = supportsBulkGetMap[dbUrl];
if (typeof supportsBulkGet !== 'boolean') {
// check if this database supports _bulk_get
doBulkGet(function (err, res$$) {
/* istanbul ignore else */
if (err) {
var status = Math.floor(err.status / 100);
/* istanbul ignore else */
if (status === 4 || status === 5) { // 40x or 50x
supportsBulkGetMap[dbUrl] = false;
res(
err.status,
'PouchDB is just detecting if the remote ' +
'supports the _bulk_get API.'
);
doBulkGetShim();
} else {
callback(err);
}
} else {
supportsBulkGetMap[dbUrl] = true;
callback(null, res$$);
}
});
} else if (supportsBulkGet) {
/* istanbul ignore next */
doBulkGet(callback);
} else {
doBulkGetShim();
}
});
// Calls GET on the host, which gets back a JSON string containing
// couchdb: A welcome string
// version: The version of CouchDB it is running
api._info = function (callback) {
setup().then(function () {
ajax({}, {
method: 'GET',
url: genDBUrl(host, '')
}, function (err, res$$) {
/* istanbul ignore next */
if (err) {
return callback(err);
}
res$$.host = genDBUrl(host, '');
callback(null, res$$);
});
}).catch(callback);
};
// Get the document with the given id from the database given by host.
// The id could be solely the _id in the database, or it may be a
// _design/ID or _local/ID path
api.get = adapterFun$$('get', function (id, opts, callback) {
// If no options were given, set the callback to the second parameter
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
opts = clone(opts);
// List of parameters to add to the GET request
var params = {};
if (opts.revs) {
params.revs = true;
}
if (opts.revs_info) {
params.revs_info = true;
}
if (opts.open_revs) {
if (opts.open_revs !== "all") {
opts.open_revs = JSON.stringify(opts.open_revs);
}
params.open_revs = opts.open_revs;
}
if (opts.rev) {
params.rev = opts.rev;
}
if (opts.conflicts) {
params.conflicts = opts.conflicts;
}
id = encodeDocId(id);
// Set the options for the ajax call
var options = {
method: 'GET',
url: genDBUrl(host, id + paramsToStr(params))
};
function fetchAttachments(doc) {
var atts = doc._attachments;
var filenames = atts && Object.keys(atts);
if (!atts || !filenames.length) {
return;
}
// we fetch these manually in separate XHRs, because
// Sync Gateway would normally send it back as multipart/mixed,
// which we cannot parse. Also, this is more efficient than
// receiving attachments as base64-encoded strings.
return PouchPromise.all(filenames.map(function (filename) {
var att = atts[filename];
var path = encodeDocId(doc._id) + '/' + encodeAttachmentId(filename) +
'?rev=' + doc._rev;
return ajaxPromise(opts, {
method: 'GET',
url: genDBUrl(host, path),
binary: true
}).then(function (blob) {
if (opts.binary) {
return blob;
}
return blobToBase64(blob);
}).then(function (data) {
delete att.stub;
delete att.length;
att.data = data;
});
}));
}
function fetchAllAttachments(docOrDocs) {
if (Array.isArray(docOrDocs)) {
return PouchPromise.all(docOrDocs.map(function (doc) {
if (doc.ok) {
return fetchAttachments(doc.ok);
}
}));
}
return fetchAttachments(docOrDocs);
}
ajaxPromise(opts, options).then(function (res$$) {
return PouchPromise.resolve().then(function () {
if (opts.attachments) {
return fetchAllAttachments(res$$);
}
}).then(function () {
callback(null, res$$);
});
}).catch(callback);
});
// Delete the document given by doc from the database given by host.
api.remove = adapterFun$$('remove',
function (docOrId, optsOrRev, opts, callback) {
var doc;
if (typeof optsOrRev === 'string') {
// id, rev, opts, callback style
doc = {
_id: docOrId,
_rev: optsOrRev
};
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
} else {
// doc, opts, callback style
doc = docOrId;
if (typeof optsOrRev === 'function') {
callback = optsOrRev;
opts = {};
} else {
callback = opts;
opts = optsOrRev;
}
}
var rev = (doc._rev || opts.rev);
// Delete the document
ajax(opts, {
method: 'DELETE',
url: genDBUrl(host, encodeDocId(doc._id)) + '?rev=' + rev
}, callback);
});
function encodeAttachmentId(attachmentId) {
return attachmentId.split("/").map(encodeURIComponent).join("/");
}
// Get the attachment
api.getAttachment =
adapterFun$$('getAttachment', function (docId, attachmentId, opts,
callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
var params = opts.rev ? ('?rev=' + opts.rev) : '';
var url = genDBUrl(host, encodeDocId(docId)) + '/' +
encodeAttachmentId(attachmentId) + params;
ajax(opts, {
method: 'GET',
url: url,
binary: true
}, callback);
});
// Remove the attachment given by the id and rev
api.removeAttachment =
adapterFun$$('removeAttachment', function (docId, attachmentId, rev,
callback) {
var url = genDBUrl(host, encodeDocId(docId) + '/' +
encodeAttachmentId(attachmentId)) + '?rev=' + rev;
ajax({}, {
method: 'DELETE',
url: url
}, callback);
});
// Add the attachment given by blob and its contentType property
// to the document with the given id, the revision given by rev, and
// add it to the database given by host.
api.putAttachment =
adapterFun$$('putAttachment', function (docId, attachmentId, rev, blob,
type, callback) {
if (typeof type === 'function') {
callback = type;
type = blob;
blob = rev;
rev = null;
}
var id = encodeDocId(docId) + '/' + encodeAttachmentId(attachmentId);
var url = genDBUrl(host, id);
if (rev) {
url += '?rev=' + rev;
}
if (typeof blob === 'string') {
// input is assumed to be a base64 string
var binary;
try {
binary = atob(blob);
} catch (err) {
return callback(createError(BAD_ARG,
'Attachment is not a valid base64 string'));
}
blob = binary ? binStringToBluffer(binary, type) : '';
}
var opts = {
headers: {'Content-Type': type},
method: 'PUT',
url: url,
processData: false,
body: blob,
timeout: ajaxOpts.timeout || 60000
};
// Add the attachment
ajax({}, opts, callback);
});
// Update/create multiple documents given by req in the database
// given by host.
api._bulkDocs = function (req, opts, callback) {
// If new_edits=false then it prevents the database from creating
// new revision numbers for the documents. Instead it just uses
// the old ones. This is used in database replication.
req.new_edits = opts.new_edits;
setup().then(function () {
return PouchPromise.all(req.docs.map(preprocessAttachments));
}).then(function () {
// Update/create the documents
ajax(opts, {
method: 'POST',
url: genDBUrl(host, '_bulk_docs'),
body: req
}, function (err, results) {
if (err) {
return callback(err);
}
results.forEach(function (result) {
result.ok = true; // smooths out cloudant not adding this
});
callback(null, results);
});
}).catch(callback);
};
// Get a listing of the documents in the database given
// by host and ordered by increasing id.
api.allDocs = adapterFun$$('allDocs', function (opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
opts = clone(opts);
// List of parameters to add to the GET request
var params = {};
var body;
var method = 'GET';
if (opts.conflicts) {
params.conflicts = true;
}
if (opts.descending) {
params.descending = true;
}
if (opts.include_docs) {
params.include_docs = true;
}
// added in CouchDB 1.6.0
if (opts.attachments) {
params.attachments = true;
}
if (opts.key) {
params.key = JSON.stringify(opts.key);
}
if (opts.start_key) {
opts.startkey = opts.start_key;
}
if (opts.startkey) {
params.startkey = JSON.stringify(opts.startkey);
}
if (opts.end_key) {
opts.endkey = opts.end_key;
}
if (opts.endkey) {
params.endkey = JSON.stringify(opts.endkey);
}
if (typeof opts.inclusive_end !== 'undefined') {
params.inclusive_end = !!opts.inclusive_end;
}
if (typeof opts.limit !== 'undefined') {
params.limit = opts.limit;
}
if (typeof opts.skip !== 'undefined') {
params.skip = opts.skip;
}
var paramStr = paramsToStr(params);
if (typeof opts.keys !== 'undefined') {
var keysAsString =
'keys=' + encodeURIComponent(JSON.stringify(opts.keys));
if (keysAsString.length + paramStr.length + 1 <= MAX_URL_LENGTH) {
// If the keys are short enough, do a GET. we do this to work around
// Safari not understanding 304s on POSTs (see issue #1239)
paramStr += '&' + keysAsString;
} else {
// If keys are too long, issue a POST request to circumvent GET
// query string limits
// see http://wiki.apache.org/couchdb/HTTP_view_API#Querying_Options
method = 'POST';
body = {keys: opts.keys};
}
}
// Get the document listing
ajaxPromise(opts, {
method: method,
url: genDBUrl(host, '_all_docs' + paramStr),
body: body
}).then(function (res$$) {
if (opts.include_docs && opts.attachments && opts.binary) {
res$$.rows.forEach(readAttachmentsAsBlobOrBuffer);
}
callback(null, res$$);
}).catch(callback);
});
// Get a list of changes made to documents in the database given by host.
// TODO According to the README, there should be two other methods here,
// api.changes.addListener and api.changes.removeListener.
api._changes = function (opts) {
// We internally page the results of a changes request, this means
// if there is a large set of changes to be returned we can start
// processing them quicker instead of waiting on the entire
// set of changes to return and attempting to process them at once
var batchSize = 'batch_size' in opts ? opts.batch_size : CHANGES_BATCH_SIZE;
opts = clone(opts);
opts.timeout = ('timeout' in opts) ? opts.timeout :
('timeout' in ajaxOpts) ? ajaxOpts.timeout :
30 * 1000;
// We give a 5 second buffer for CouchDB changes to respond with
// an ok timeout (if a timeout it set)
var params = opts.timeout ? {timeout: opts.timeout - (5 * 1000)} : {};
var limit = (typeof opts.limit !== 'undefined') ? opts.limit : false;
var returnDocs;
if ('return_docs' in opts) {
returnDocs = opts.return_docs;
} else if ('returnDocs' in opts) {
// TODO: Remove 'returnDocs' in favor of 'return_docs' in a future release
returnDocs = opts.returnDocs;
} else {
returnDocs = true;
}
//
var leftToFetch = limit;
if (opts.style) {
params.style = opts.style;
}
if (opts.include_docs || opts.filter && typeof opts.filter === 'function') {
params.include_docs = true;
}
if (opts.attachments) {
params.attachments = true;
}
if (opts.continuous) {
params.feed = 'longpoll';
}
if (opts.conflicts) {
params.conflicts = true;
}
if (opts.descending) {
params.descending = true;
}
if ('heartbeat' in opts) {
// If the heartbeat value is false, it disables the default heartbeat
if (opts.heartbeat) {
params.heartbeat = opts.heartbeat;
}
} else {
// Default heartbeat to 10 seconds
params.heartbeat = 10000;
}
if (opts.filter && typeof opts.filter === 'string') {
params.filter = opts.filter;
if (opts.filter === '_view' &&
opts.view &&
typeof opts.view === 'string') {
params.view = opts.view;
}
}
// If opts.query_params exists, pass it through to the changes request.
// These parameters may be used by the filter on the source database.
if (opts.query_params && typeof opts.query_params === 'object') {
for (var param_name in opts.query_params) {
/* istanbul ignore else */
if (opts.query_params.hasOwnProperty(param_name)) {
params[param_name] = opts.query_params[param_name];
}
}
}
var method = 'GET';
var body;
if (opts.doc_ids) {
// set this automagically for the user; it's annoying that couchdb
// requires both a "filter" and a "doc_ids" param.
params.filter = '_doc_ids';
var docIdsJson = JSON.stringify(opts.doc_ids);
if (docIdsJson.length < MAX_URL_LENGTH) {
params.doc_ids = docIdsJson;
} else {
// anything greater than ~2000 is unsafe for gets, so
// use POST instead
method = 'POST';
body = {doc_ids: opts.doc_ids };
}
}
var xhr;
var lastFetchedSeq;
// Get all the changes starting wtih the one immediately after the
// sequence number given by since.
var fetch = function (since, callback) {
if (opts.aborted) {
return;
}
params.since = since;
// "since" can be any kind of json object in Coudant/CouchDB 2.x
/* istanbul ignore next */
if (typeof params.since === "object") {
params.since = JSON.stringify(params.since);
}
if (opts.descending) {
if (limit) {
params.limit = leftToFetch;
}
} else {
params.limit = (!limit || leftToFetch > batchSize) ?
batchSize : leftToFetch;
}
// Set the options for the ajax call
var xhrOpts = {
method: method,
url: genDBUrl(host, '_changes' + paramsToStr(params)),
timeout: opts.timeout,
body: body
};
lastFetchedSeq = since;
/* istanbul ignore if */
if (opts.aborted) {
return;
}
// Get the changes
setup().then(function () {
xhr = ajax(opts, xhrOpts, callback);
}).catch(callback);
};
// If opts.since exists, get all the changes from the sequence
// number given by opts.since. Otherwise, get all the changes
// from the sequence number 0.
var results = {results: []};
var fetched = function (err, res$$) {
if (opts.aborted) {
return;
}
var raw_results_length = 0;
// If the result of the ajax call (res) contains changes (res.results)
if (res$$ && res$$.results) {
raw_results_length = res$$.results.length;
results.last_seq = res$$.last_seq;
// For each change
var req = {};
req.query = opts.query_params;
res$$.results = res$$.results.filter(function (c) {
leftToFetch--;
var ret = filterChange(opts)(c);
if (ret) {
if (opts.include_docs && opts.attachments && opts.binary) {
readAttachmentsAsBlobOrBuffer(c);
}
if (returnDocs) {
results.results.push(c);
}
opts.onChange(c);
}
return ret;
});
} else if (err) {
// In case of an error, stop listening for changes and call
// opts.complete
opts.aborted = true;
opts.complete(err);
return;
}
// The changes feed may have timed out with no results
// if so reuse last update sequence
if (res$$ && res$$.last_seq) {
lastFetchedSeq = res$$.last_seq;
}
var finished = (limit && leftToFetch <= 0) ||
(res$$ && raw_results_length < batchSize) ||
(opts.descending);
if ((opts.continuous && !(limit && leftToFetch <= 0)) || !finished) {
// Queue a call to fetch again with the newest sequence number
setTimeout(function () { fetch(lastFetchedSeq, fetched); }, 0);
} else {
// We're done, call the callback
opts.complete(null, results);
}
};
fetch(opts.since || 0, fetched);
// Return a method to cancel this method from processing any more
return {
cancel: function () {
opts.aborted = true;
if (xhr) {
xhr.abort();
}
}
};
};
// Given a set of document/revision IDs (given by req), tets the subset of
// those that do NOT correspond to revisions stored in the database.
// See http://wiki.apache.org/couchdb/HttpPostRevsDiff
api.revsDiff = adapterFun$$('revsDiff', function (req, opts, callback) {
// If no options were given, set the callback to be the second parameter
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
// Get the missing document/revision IDs
ajax(opts, {
method: 'POST',
url: genDBUrl(host, '_revs_diff'),
body: req
}, callback);
});
api._close = function (callback) {
callback();
};
api._destroy = function (options, callback) {
ajax(options, {
url: genDBUrl(host, ''),
method: 'DELETE'
}, function (err, resp) {
if (err && err.status && err.status !== 404) {
return callback(err);
}
api.emit('destroyed');
api.constructor.emit('destroyed', opts.name);
callback(null, resp);
});
};
}
// HttpPouch is a valid adapter.
HttpPouch.valid = function () {
return true;
};
function TaskQueue$1() {
this.promise = new PouchPromise(function (fulfill) {fulfill(); });
}
TaskQueue$1.prototype.add = function (promiseFactory) {
this.promise = this.promise.catch(function () {
// just recover
}).then(function () {
return promiseFactory();
});
return this.promise;
};
TaskQueue$1.prototype.finish = function () {
return this.promise;
};
function MD5(string) {
return crypto.createHash('md5').update(string).digest('hex');
}
function createView(opts) {
var sourceDB = opts.db;
var viewName = opts.viewName;
var mapFun = opts.map;
var reduceFun = opts.reduce;
var temporary = opts.temporary;
// the "undefined" part is for backwards compatibility
var viewSignature = mapFun.toString() + (reduceFun && reduceFun.toString()) +
'undefined';
if (!temporary && sourceDB._cachedViews) {
var cachedView = sourceDB._cachedViews[viewSignature];
if (cachedView) {
return PouchPromise.resolve(cachedView);
}
}
return sourceDB.info().then(function (info) {
var depDbName = info.db_name + '-mrview-' +
(temporary ? 'temp' : MD5(viewSignature));
// save the view name in the source db so it can be cleaned up if necessary
// (e.g. when the _design doc is deleted, remove all associated view data)
function diffFunction(doc) {
doc.views = doc.views || {};
var fullViewName = viewName;
if (fullViewName.indexOf('/') === -1) {
fullViewName = viewName + '/' + viewName;
}
var depDbs = doc.views[fullViewName] = doc.views[fullViewName] || {};
/* istanbul ignore if */
if (depDbs[depDbName]) {
return; // no update necessary
}
depDbs[depDbName] = true;
return doc;
}
return upsert(sourceDB, '_local/mrviews', diffFunction).then(function () {
return sourceDB.registerDependentDatabase(depDbName).then(function (res) {
var db = res.db;
db.auto_compaction = true;
var view = {
name: depDbName,
db: db,
sourceDB: sourceDB,
adapter: sourceDB.adapter,
mapFun: mapFun,
reduceFun: reduceFun
};
return view.db.get('_local/lastSeq').catch(function (err) {
/* istanbul ignore if */
if (err.status !== 404) {
throw err;
}
}).then(function (lastSeqDoc) {
view.seq = lastSeqDoc ? lastSeqDoc.seq : 0;
if (!temporary) {
sourceDB._cachedViews = sourceDB._cachedViews || {};
sourceDB._cachedViews[viewSignature] = view;
view.db.once('destroyed', function () {
delete sourceDB._cachedViews[viewSignature];
});
}
return view;
});
});
});
});
}
function evalfunc(func, emit, sum, log, isArray, toJSON) {
return scopedEval(
"return (" + func.replace(/;\s*$/, "") + ");",
{
emit: emit,
sum: sum,
log: log,
isArray: isArray,
toJSON: toJSON
}
);
}
var promisedCallback$1 = function (promise, callback) {
if (callback) {
promise.then(function (res) {
process.nextTick(function () {
callback(null, res);
});
}, function (reason) {
process.nextTick(function () {
callback(reason);
});
});
}
return promise;
};
var callbackify$1 = function (fun) {
return getArguments(function (args) {
var cb = args.pop();
var promise = fun.apply(this, args);
if (typeof cb === 'function') {
promisedCallback$1(promise, cb);
}
return promise;
});
};
// Promise finally util similar to Q.finally
var fin$1 = function (promise, finalPromiseFactory) {
return promise.then(function (res) {
return finalPromiseFactory().then(function () {
return res;
});
}, function (reason) {
return finalPromiseFactory().then(function () {
throw reason;
});
});
};
var sequentialize$1 = function (queue, promiseFactory) {
return function () {
var args = arguments;
var that = this;
return queue.add(function () {
return promiseFactory.apply(that, args);
});
};
};
// uniq an array of strings, order not guaranteed
// similar to underscore/lodash _.uniq
var uniq$1 = function (arr) {
var map = {};
for (var i = 0, len = arr.length; i < len; i++) {
map['$' + arr[i]] = true;
}
var keys = Object.keys(map);
var output = new Array(keys.length);
for (i = 0, len = keys.length; i < len; i++) {
output[i] = keys[i].substring(1);
}
return output;
};
var utils$1 = {
uniq: uniq$1,
sequentialize: sequentialize$1,
fin: fin$1,
callbackify: callbackify$1,
promisedCallback: promisedCallback$1
};
var collate$2 = pouchCollate__default.collate;
var toIndexableString = pouchCollate__default.toIndexableString;
var normalizeKey = pouchCollate__default.normalizeKey;
var parseIndexableString = pouchCollate__default.parseIndexableString;
var log$2;
/* istanbul ignore else */
if ((typeof console !== 'undefined') && (typeof console.log === 'function')) {
log$2 = Function.prototype.bind.call(console.log, console);
} else {
log$2 = function () {};
}
var callbackify = utils$1.callbackify;
var sequentialize = utils$1.sequentialize;
var uniq = utils$1.uniq;
var fin = utils$1.fin;
var promisedCallback = utils$1.promisedCallback;
var persistentQueues = {};
var tempViewQueue = new TaskQueue$1();
var CHANGES_BATCH_SIZE$1 = 50;
function parseViewName(name) {
// can be either 'ddocname/viewname' or just 'viewname'
// (where the ddoc name is the same)
return name.indexOf('/') === -1 ? [name, name] : name.split('/');
}
function isGenOne$1(changes) {
// only return true if the current change is 1-
// and there are no other leafs
return changes.length === 1 && /^1-/.test(changes[0].rev);
}
function emitError(db, e) {
try {
db.emit('error', e);
} catch (err) {
console.error(
'The user\'s map/reduce function threw an uncaught error.\n' +
'You can debug this error by doing:\n' +
'myDatabase.on(\'error\', function (err) { debugger; });\n' +
'Please double-check your map/reduce function.');
console.error(e);
}
}
function tryCode(db, fun, args) {
// emit an event if there was an error thrown by a map/reduce function.
// putting try/catches in a single function also avoids deoptimizations.
try {
return {
output : fun.apply(null, args)
};
} catch (e) {
emitError(db, e);
return {error: e};
}
}
function sortByKeyThenValue(x, y) {
var keyCompare = collate$2(x.key, y.key);
return keyCompare !== 0 ? keyCompare : collate$2(x.value, y.value);
}
function sliceResults(results, limit, skip) {
skip = skip || 0;
if (typeof limit === 'number') {
return results.slice(skip, limit + skip);
} else if (skip > 0) {
return results.slice(skip);
}
return results;
}
function rowToDocId(row) {
var val = row.value;
// Users can explicitly specify a joined doc _id, or it
// defaults to the doc _id that emitted the key/value.
var docId = (val && typeof val === 'object' && val._id) || row.id;
return docId;
}
function readAttachmentsAsBlobOrBuffer$1(res) {
res.rows.forEach(function (row) {
var atts = row.doc && row.doc._attachments;
if (!atts) {
return;
}
Object.keys(atts).forEach(function (filename) {
var att = atts[filename];
atts[filename].data = b64ToBluffer(att.data, att.content_type);
});
});
}
function postprocessAttachments(opts) {
return function (res) {
if (opts.include_docs && opts.attachments && opts.binary) {
readAttachmentsAsBlobOrBuffer$1(res);
}
return res;
};
}
function createBuiltInError(name) {
var message = 'builtin ' + name +
' function requires map values to be numbers' +
' or number arrays';
return new BuiltInError(message);
}
function sum(values) {
var result = 0;
for (var i = 0, len = values.length; i < len; i++) {
var num = values[i];
if (typeof num !== 'number') {
if (Array.isArray(num)) {
// lists of numbers are also allowed, sum them separately
result = typeof result === 'number' ? [result] : result;
for (var j = 0, jLen = num.length; j < jLen; j++) {
var jNum = num[j];
if (typeof jNum !== 'number') {
throw createBuiltInError('_sum');
} else if (typeof result[j] === 'undefined') {
result.push(jNum);
} else {
result[j] += jNum;
}
}
} else { // not array/number
throw createBuiltInError('_sum');
}
} else if (typeof result === 'number') {
result += num;
} else { // add number to array
result[0] += num;
}
}
return result;
}
var builtInReduce = {
_sum: function (keys, values) {
return sum(values);
},
_count: function (keys, values) {
return values.length;
},
_stats: function (keys, values) {
// no need to implement rereduce=true, because Pouch
// will never call it
function sumsqr(values) {
var _sumsqr = 0;
for (var i = 0, len = values.length; i < len; i++) {
var num = values[i];
_sumsqr += (num * num);
}
return _sumsqr;
}
return {
sum : sum(values),
min : Math.min.apply(null, values),
max : Math.max.apply(null, values),
count : values.length,
sumsqr : sumsqr(values)
};
}
};
function addHttpParam(paramName, opts, params, asJson) {
// add an http param from opts to params, optionally json-encoded
var val = opts[paramName];
if (typeof val !== 'undefined') {
if (asJson) {
val = encodeURIComponent(JSON.stringify(val));
}
params.push(paramName + '=' + val);
}
}
function coerceInteger(integerCandidate) {
if (typeof integerCandidate !== 'undefined') {
var asNumber = Number(integerCandidate);
// prevents e.g. '1foo' or '1.1' being coerced to 1
if (!isNaN(asNumber) && asNumber === parseInt(integerCandidate, 10)) {
return asNumber;
} else {
return integerCandidate;
}
}
}
function coerceOptions(opts) {
opts.group_level = coerceInteger(opts.group_level);
opts.limit = coerceInteger(opts.limit);
opts.skip = coerceInteger(opts.skip);
return opts;
}
function checkPositiveInteger(number) {
if (number) {
if (typeof number !== 'number') {
return new QueryParseError('Invalid value for integer: "' +
number + '"');
}
if (number < 0) {
return new QueryParseError('Invalid value for positive integer: ' +
'"' + number + '"');
}
}
}
function checkQueryParseError(options, fun) {
var startkeyName = options.descending ? 'endkey' : 'startkey';
var endkeyName = options.descending ? 'startkey' : 'endkey';
if (typeof options[startkeyName] !== 'undefined' &&
typeof options[endkeyName] !== 'undefined' &&
collate$2(options[startkeyName], options[endkeyName]) > 0) {
throw new QueryParseError('No rows can match your key range, ' +
'reverse your start_key and end_key or set {descending : true}');
} else if (fun.reduce && options.reduce !== false) {
if (options.include_docs) {
throw new QueryParseError('{include_docs:true} is invalid for reduce');
} else if (options.keys && options.keys.length > 1 &&
!options.group && !options.group_level) {
throw new QueryParseError('Multi-key fetches for reduce views must use ' +
'{group: true}');
}
}
['group_level', 'limit', 'skip'].forEach(function (optionName) {
var error = checkPositiveInteger(options[optionName]);
if (error) {
throw error;
}
});
}
function httpQuery(db, fun, opts) {
// List of parameters to add to the PUT request
var params = [];
var body;
var method = 'GET';
// If opts.reduce exists and is defined, then add it to the list
// of parameters.
// If reduce=false then the results are that of only the map function
// not the final result of map and reduce.
addHttpParam('reduce', opts, params);
addHttpParam('include_docs', opts, params);
addHttpParam('attachments', opts, params);
addHttpParam('limit', opts, params);
addHttpParam('descending', opts, params);
addHttpParam('group', opts, params);
addHttpParam('group_level', opts, params);
addHttpParam('skip', opts, params);
addHttpParam('stale', opts, params);
addHttpParam('conflicts', opts, params);
addHttpParam('startkey', opts, params, true);
addHttpParam('start_key', opts, params, true);
addHttpParam('endkey', opts, params, true);
addHttpParam('end_key', opts, params, true);
addHttpParam('inclusive_end', opts, params);
addHttpParam('key', opts, params, true);
// Format the list of parameters into a valid URI query string
params = params.join('&');
params = params === '' ? '' : '?' + params;
// If keys are supplied, issue a POST to circumvent GET query string limits
// see http://wiki.apache.org/couchdb/HTTP_view_API#Querying_Options
if (typeof opts.keys !== 'undefined') {
var MAX_URL_LENGTH = 2000;
// according to http://stackoverflow.com/a/417184/680742,
// the de facto URL length limit is 2000 characters
var keysAsString =
'keys=' + encodeURIComponent(JSON.stringify(opts.keys));
if (keysAsString.length + params.length + 1 <= MAX_URL_LENGTH) {
// If the keys are short enough, do a GET. we do this to work around
// Safari not understanding 304s on POSTs (see pouchdb/pouchdb#1239)
params += (params[0] === '?' ? '&' : '?') + keysAsString;
} else {
method = 'POST';
if (typeof fun === 'string') {
body = {keys: opts.keys};
} else { // fun is {map : mapfun}, so append to this
fun.keys = opts.keys;
}
}
}
// We are referencing a query defined in the design doc
if (typeof fun === 'string') {
var parts = parseViewName(fun);
return db.request({
method: method,
url: '_design/' + parts[0] + '/_view/' + parts[1] + params,
body: body
}).then(postprocessAttachments(opts));
}
// We are using a temporary view, terrible for performance, good for testing
body = body || {};
Object.keys(fun).forEach(function (key) {
if (Array.isArray(fun[key])) {
body[key] = fun[key];
} else {
body[key] = fun[key].toString();
}
});
return db.request({
method: 'POST',
url: '_temp_view' + params,
body: body
}).then(postprocessAttachments(opts));
}
// custom adapters can define their own api._query
// and override the default behavior
/* istanbul ignore next */
function customQuery(db, fun, opts) {
return new PouchPromise(function (resolve, reject) {
db._query(fun, opts, function (err, res) {
if (err) {
return reject(err);
}
resolve(res);
});
});
}
// custom adapters can define their own api._viewCleanup
// and override the default behavior
/* istanbul ignore next */
function customViewCleanup(db) {
return new PouchPromise(function (resolve, reject) {
db._viewCleanup(function (err, res) {
if (err) {
return reject(err);
}
resolve(res);
});
});
}
function defaultsTo(value) {
return function (reason) {
/* istanbul ignore else */
if (reason.status === 404) {
return value;
} else {
throw reason;
}
};
}
// returns a promise for a list of docs to update, based on the input docId.
// the order doesn't matter, because post-3.2.0, bulkDocs
// is an atomic operation in all three adapters.
function getDocsToPersist(docId, view, docIdsToChangesAndEmits) {
var metaDocId = '_local/doc_' + docId;
var defaultMetaDoc = {_id: metaDocId, keys: []};
var docData = docIdsToChangesAndEmits[docId];
var indexableKeysToKeyValues = docData.indexableKeysToKeyValues;
var changes = docData.changes;
function getMetaDoc() {
if (isGenOne$1(changes)) {
// generation 1, so we can safely assume initial state
// for performance reasons (avoids unnecessary GETs)
return PouchPromise.resolve(defaultMetaDoc);
}
return view.db.get(metaDocId).catch(defaultsTo(defaultMetaDoc));
}
function getKeyValueDocs(metaDoc) {
if (!metaDoc.keys.length) {
// no keys, no need for a lookup
return PouchPromise.resolve({rows: []});
}
return view.db.allDocs({
keys: metaDoc.keys,
include_docs: true
});
}
function processKvDocs(metaDoc, kvDocsRes) {
var kvDocs = [];
var oldKeysMap = {};
for (var i = 0, len = kvDocsRes.rows.length; i < len; i++) {
var row = kvDocsRes.rows[i];
var doc = row.doc;
if (!doc) { // deleted
continue;
}
kvDocs.push(doc);
oldKeysMap[doc._id] = true;
doc._deleted = !indexableKeysToKeyValues[doc._id];
if (!doc._deleted) {
var keyValue = indexableKeysToKeyValues[doc._id];
if ('value' in keyValue) {
doc.value = keyValue.value;
}
}
}
var newKeys = Object.keys(indexableKeysToKeyValues);
newKeys.forEach(function (key) {
if (!oldKeysMap[key]) {
// new doc
var kvDoc = {
_id: key
};
var keyValue = indexableKeysToKeyValues[key];
if ('value' in keyValue) {
kvDoc.value = keyValue.value;
}
kvDocs.push(kvDoc);
}
});
metaDoc.keys = uniq(newKeys.concat(metaDoc.keys));
kvDocs.push(metaDoc);
return kvDocs;
}
return getMetaDoc().then(function (metaDoc) {
return getKeyValueDocs(metaDoc).then(function (kvDocsRes) {
return processKvDocs(metaDoc, kvDocsRes);
});
});
}
// updates all emitted key/value docs and metaDocs in the mrview database
// for the given batch of documents from the source database
function saveKeyValues(view, docIdsToChangesAndEmits, seq) {
var seqDocId = '_local/lastSeq';
return view.db.get(seqDocId)
.catch(defaultsTo({_id: seqDocId, seq: 0}))
.then(function (lastSeqDoc) {
var docIds = Object.keys(docIdsToChangesAndEmits);
return PouchPromise.all(docIds.map(function (docId) {
return getDocsToPersist(docId, view, docIdsToChangesAndEmits);
})).then(function (listOfDocsToPersist) {
var docsToPersist = flatten(listOfDocsToPersist);
lastSeqDoc.seq = seq;
docsToPersist.push(lastSeqDoc);
// write all docs in a single operation, update the seq once
return view.db.bulkDocs({docs : docsToPersist});
});
});
}
function getQueue(view) {
var viewName = typeof view === 'string' ? view : view.name;
var queue = persistentQueues[viewName];
if (!queue) {
queue = persistentQueues[viewName] = new TaskQueue$1();
}
return queue;
}
function updateView(view) {
return sequentialize(getQueue(view), function () {
return updateViewInQueue(view);
})();
}
function updateViewInQueue(view) {
// bind the emit function once
var mapResults;
var doc;
function emit(key, value) {
var output = {id: doc._id, key: normalizeKey(key)};
// Don't explicitly store the value unless it's defined and non-null.
// This saves on storage space, because often people don't use it.
if (typeof value !== 'undefined' && value !== null) {
output.value = normalizeKey(value);
}
mapResults.push(output);
}
var mapFun;
// for temp_views one can use emit(doc, emit), see #38
if (typeof view.mapFun === "function" && view.mapFun.length === 2) {
var origMap = view.mapFun;
mapFun = function (doc) {
return origMap(doc, emit);
};
} else {
mapFun = evalfunc(view.mapFun.toString(), emit, sum, log$2, Array.isArray,
JSON.parse);
}
var currentSeq = view.seq || 0;
function processChange(docIdsToChangesAndEmits, seq) {
return function () {
return saveKeyValues(view, docIdsToChangesAndEmits, seq);
};
}
var queue = new TaskQueue$1();
// TODO(neojski): https://github.com/daleharvey/pouchdb/issues/1521
return new PouchPromise(function (resolve, reject) {
function complete() {
queue.finish().then(function () {
view.seq = currentSeq;
resolve();
});
}
function processNextBatch() {
view.sourceDB.changes({
conflicts: true,
include_docs: true,
style: 'all_docs',
since: currentSeq,
limit: CHANGES_BATCH_SIZE$1
}).on('complete', function (response) {
var results = response.results;
if (!results.length) {
return complete();
}
var docIdsToChangesAndEmits = {};
for (var i = 0, l = results.length; i < l; i++) {
var change = results[i];
if (change.doc._id[0] !== '_') {
mapResults = [];
doc = change.doc;
if (!doc._deleted) {
tryCode(view.sourceDB, mapFun, [doc]);
}
mapResults.sort(sortByKeyThenValue);
var indexableKeysToKeyValues = {};
var lastKey;
for (var j = 0, jl = mapResults.length; j < jl; j++) {
var obj = mapResults[j];
var complexKey = [obj.key, obj.id];
if (collate$2(obj.key, lastKey) === 0) {
complexKey.push(j); // dup key+id, so make it unique
}
var indexableKey = toIndexableString(complexKey);
indexableKeysToKeyValues[indexableKey] = obj;
lastKey = obj.key;
}
docIdsToChangesAndEmits[change.doc._id] = {
indexableKeysToKeyValues: indexableKeysToKeyValues,
changes: change.changes
};
}
currentSeq = change.seq;
}
queue.add(processChange(docIdsToChangesAndEmits, currentSeq));
if (results.length < CHANGES_BATCH_SIZE$1) {
return complete();
}
return processNextBatch();
}).on('error', onError);
/* istanbul ignore next */
function onError(err) {
reject(err);
}
}
processNextBatch();
});
}
function reduceView(view, results, options) {
if (options.group_level === 0) {
delete options.group_level;
}
var shouldGroup = options.group || options.group_level;
var reduceFun;
if (builtInReduce[view.reduceFun]) {
reduceFun = builtInReduce[view.reduceFun];
} else {
reduceFun = evalfunc(
view.reduceFun.toString(), null, sum, log$2, Array.isArray, JSON.parse);
}
var groups = [];
var lvl = isNaN(options.group_level) ? Number.POSITIVE_INFINITY :
options.group_level;
results.forEach(function (e) {
var last = groups[groups.length - 1];
var groupKey = shouldGroup ? e.key : null;
// only set group_level for array keys
if (shouldGroup && Array.isArray(groupKey)) {
groupKey = groupKey.slice(0, lvl);
}
if (last && collate$2(last.groupKey, groupKey) === 0) {
last.keys.push([e.key, e.id]);
last.values.push(e.value);
return;
}
groups.push({
keys: [[e.key, e.id]],
values: [e.value],
groupKey: groupKey
});
});
results = [];
for (var i = 0, len = groups.length; i < len; i++) {
var e = groups[i];
var reduceTry = tryCode(view.sourceDB, reduceFun,
[e.keys, e.values, false]);
if (reduceTry.error && reduceTry.error instanceof BuiltInError) {
// CouchDB returns an error if a built-in errors out
throw reduceTry.error;
}
results.push({
// CouchDB just sets the value to null if a non-built-in errors out
value: reduceTry.error ? null : reduceTry.output,
key: e.groupKey
});
}
// no total_rows/offset when reducing
return {rows: sliceResults(results, options.limit, options.skip)};
}
function queryView(view, opts) {
return sequentialize(getQueue(view), function () {
return queryViewInQueue(view, opts);
})();
}
function queryViewInQueue(view, opts) {
var totalRows;
var shouldReduce = view.reduceFun && opts.reduce !== false;
var skip = opts.skip || 0;
if (typeof opts.keys !== 'undefined' && !opts.keys.length) {
// equivalent query
opts.limit = 0;
delete opts.keys;
}
function fetchFromView(viewOpts) {
viewOpts.include_docs = true;
return view.db.allDocs(viewOpts).then(function (res) {
totalRows = res.total_rows;
return res.rows.map(function (result) {
// implicit migration - in older versions of PouchDB,
// we explicitly stored the doc as {id: ..., key: ..., value: ...}
// this is tested in a migration test
/* istanbul ignore next */
if ('value' in result.doc && typeof result.doc.value === 'object' &&
result.doc.value !== null) {
var keys = Object.keys(result.doc.value).sort();
// this detection method is not perfect, but it's unlikely the user
// emitted a value which was an object with these 3 exact keys
var expectedKeys = ['id', 'key', 'value'];
if (!(keys < expectedKeys || keys > expectedKeys)) {
return result.doc.value;
}
}
var parsedKeyAndDocId = parseIndexableString(result.doc._id);
return {
key: parsedKeyAndDocId[0],
id: parsedKeyAndDocId[1],
value: ('value' in result.doc ? result.doc.value : null)
};
});
});
}
function onMapResultsReady(rows) {
var finalResults;
if (shouldReduce) {
finalResults = reduceView(view, rows, opts);
} else {
finalResults = {
total_rows: totalRows,
offset: skip,
rows: rows
};
}
if (opts.include_docs) {
var docIds = uniq(rows.map(rowToDocId));
return view.sourceDB.allDocs({
keys: docIds,
include_docs: true,
conflicts: opts.conflicts,
attachments: opts.attachments,
binary: opts.binary
}).then(function (allDocsRes) {
var docIdsToDocs = {};
allDocsRes.rows.forEach(function (row) {
if (row.doc) {
docIdsToDocs['$' + row.id] = row.doc;
}
});
rows.forEach(function (row) {
var docId = rowToDocId(row);
var doc = docIdsToDocs['$' + docId];
if (doc) {
row.doc = doc;
}
});
return finalResults;
});
} else {
return finalResults;
}
}
if (typeof opts.keys !== 'undefined') {
var keys = opts.keys;
var fetchPromises = keys.map(function (key) {
var viewOpts = {
startkey : toIndexableString([key]),
endkey : toIndexableString([key, {}])
};
return fetchFromView(viewOpts);
});
return PouchPromise.all(fetchPromises).then(flatten).then(onMapResultsReady);
} else { // normal query, no 'keys'
var viewOpts = {
descending : opts.descending
};
if (opts.start_key) {
opts.startkey = opts.start_key;
}
if (opts.end_key) {
opts.endkey = opts.end_key;
}
if (typeof opts.startkey !== 'undefined') {
viewOpts.startkey = opts.descending ?
toIndexableString([opts.startkey, {}]) :
toIndexableString([opts.startkey]);
}
if (typeof opts.endkey !== 'undefined') {
var inclusiveEnd = opts.inclusive_end !== false;
if (opts.descending) {
inclusiveEnd = !inclusiveEnd;
}
viewOpts.endkey = toIndexableString(
inclusiveEnd ? [opts.endkey, {}] : [opts.endkey]);
}
if (typeof opts.key !== 'undefined') {
var keyStart = toIndexableString([opts.key]);
var keyEnd = toIndexableString([opts.key, {}]);
if (viewOpts.descending) {
viewOpts.endkey = keyStart;
viewOpts.startkey = keyEnd;
} else {
viewOpts.startkey = keyStart;
viewOpts.endkey = keyEnd;
}
}
if (!shouldReduce) {
if (typeof opts.limit === 'number') {
viewOpts.limit = opts.limit;
}
viewOpts.skip = skip;
}
return fetchFromView(viewOpts).then(onMapResultsReady);
}
}
function httpViewCleanup(db) {
return db.request({
method: 'POST',
url: '_view_cleanup'
});
}
function localViewCleanup(db) {
return db.get('_local/mrviews').then(function (metaDoc) {
var docsToViews = {};
Object.keys(metaDoc.views).forEach(function (fullViewName) {
var parts = parseViewName(fullViewName);
var designDocName = '_design/' + parts[0];
var viewName = parts[1];
docsToViews[designDocName] = docsToViews[designDocName] || {};
docsToViews[designDocName][viewName] = true;
});
var opts = {
keys : Object.keys(docsToViews),
include_docs : true
};
return db.allDocs(opts).then(function (res) {
var viewsToStatus = {};
res.rows.forEach(function (row) {
var ddocName = row.key.substring(8);
Object.keys(docsToViews[row.key]).forEach(function (viewName) {
var fullViewName = ddocName + '/' + viewName;
/* istanbul ignore if */
if (!metaDoc.views[fullViewName]) {
// new format, without slashes, to support PouchDB 2.2.0
// migration test in pouchdb's browser.migration.js verifies this
fullViewName = viewName;
}
var viewDBNames = Object.keys(metaDoc.views[fullViewName]);
// design doc deleted, or view function nonexistent
var statusIsGood = row.doc && row.doc.views &&
row.doc.views[viewName];
viewDBNames.forEach(function (viewDBName) {
viewsToStatus[viewDBName] =
viewsToStatus[viewDBName] || statusIsGood;
});
});
});
var dbsToDelete = Object.keys(viewsToStatus).filter(
function (viewDBName) { return !viewsToStatus[viewDBName]; });
var destroyPromises = dbsToDelete.map(function (viewDBName) {
return sequentialize(getQueue(viewDBName), function () {
return new db.constructor(viewDBName, db.__opts).destroy();
})();
});
return PouchPromise.all(destroyPromises).then(function () {
return {ok: true};
});
});
}, defaultsTo({ok: true}));
}
var viewCleanup = callbackify(function () {
var db = this;
if (db._ddocCache) {
delete db._ddocCache;
}
if (db.type() === 'http') {
return httpViewCleanup(db);
}
/* istanbul ignore next */
if (typeof db._viewCleanup === 'function') {
return customViewCleanup(db);
}
return localViewCleanup(db);
});
function queryPromised(db, fun, opts) {
if (db.type() === 'http') {
return httpQuery(db, fun, opts);
}
/* istanbul ignore next */
if (typeof db._query === 'function') {
return customQuery(db, fun, opts);
}
if (typeof fun !== 'string') {
// temp_view
checkQueryParseError(opts, fun);
var createViewOpts = {
db : db,
viewName : 'temp_view/temp_view',
map : fun.map,
reduce : fun.reduce,
temporary : true
};
tempViewQueue.add(function () {
return createView(createViewOpts).then(function (view) {
function cleanup() {
return view.db.destroy();
}
return fin(updateView(view).then(function () {
return queryView(view, opts);
}), cleanup);
});
});
return tempViewQueue.finish();
} else {
// persistent view
var fullViewName = fun;
var parts = parseViewName(fullViewName);
var designDocName = parts[0];
var viewName = parts[1];
return db.getView(designDocName, viewName).then(function (fun) {
checkQueryParseError(opts, fun);
var createViewOpts = {
db : db,
viewName : fullViewName,
map : fun.map,
reduce : fun.reduce
};
return createView(createViewOpts).then(function (view) {
if (opts.stale === 'ok' || opts.stale === 'update_after') {
if (opts.stale === 'update_after') {
process.nextTick(function () {
updateView(view);
});
}
return queryView(view, opts);
} else { // stale not ok
return updateView(view).then(function () {
return queryView(view, opts);
});
}
});
});
}
}
var query = function (fun, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
opts = opts ? coerceOptions(opts) : {};
if (typeof fun === 'function') {
fun = {map : fun};
}
var db = this;
var promise = PouchPromise.resolve().then(function () {
return queryPromised(db, fun, opts);
});
promisedCallback(promise, callback);
return promise;
};
function QueryParseError(message) {
this.status = 400;
this.name = 'query_parse_error';
this.message = message;
this.error = true;
try {
Error.captureStackTrace(this, QueryParseError);
} catch (e) {}
}
inherits(QueryParseError, Error);
function BuiltInError(message) {
this.status = 500;
this.name = 'invalid_value';
this.message = message;
this.error = true;
try {
Error.captureStackTrace(this, BuiltInError);
} catch (e) {}
}
inherits(BuiltInError, Error);
var mapreduce = {
query: query,
viewCleanup: viewCleanup
};
// in Node of course this is false
function isChromeApp() {
return false;
}
inherits(Changes$1, events.EventEmitter);
/* istanbul ignore next */
function attachBrowserEvents(self) {
if (isChromeApp()) {
chrome.storage.onChanged.addListener(function (e) {
// make sure it's event addressed to us
if (e.db_name != null) {
//object only has oldValue, newValue members
self.emit(e.dbName.newValue);
}
});
} else if (hasLocalStorage()) {
if (typeof addEventListener !== 'undefined') {
addEventListener("storage", function (e) {
self.emit(e.key);
});
} else { // old IE
window.attachEvent("storage", function (e) {
self.emit(e.key);
});
}
}
}
function Changes$1() {
events.EventEmitter.call(this);
this._listeners = {};
attachBrowserEvents(this);
}
Changes$1.prototype.addListener = function (dbName, id, db, opts) {
/* istanbul ignore if */
if (this._listeners[id]) {
return;
}
var self = this;
var inprogress = false;
function eventFunction() {
/* istanbul ignore if */
if (!self._listeners[id]) {
return;
}
if (inprogress) {
inprogress = 'waiting';
return;
}
inprogress = true;
var changesOpts = pick(opts, [
'style', 'include_docs', 'attachments', 'conflicts', 'filter',
'doc_ids', 'view', 'since', 'query_params', 'binary'
]);
/* istanbul ignore next */
function onError() {
inprogress = false;
}
db.changes(changesOpts).on('change', function (c) {
if (c.seq > opts.since && !opts.cancelled) {
opts.since = c.seq;
opts.onChange(c);
}
}).on('complete', function () {
if (inprogress === 'waiting') {
setTimeout(function (){
eventFunction();
},0);
}
inprogress = false;
}).on('error', onError);
}
this._listeners[id] = eventFunction;
this.on(dbName, eventFunction);
};
Changes$1.prototype.removeListener = function (dbName, id) {
/* istanbul ignore if */
if (!(id in this._listeners)) {
return;
}
events.EventEmitter.prototype.removeListener.call(this, dbName,
this._listeners[id]);
};
/* istanbul ignore next */
Changes$1.prototype.notifyLocalWindows = function (dbName) {
//do a useless change on a storage thing
//in order to get other windows's listeners to activate
if (isChromeApp()) {
chrome.storage.local.set({dbName: dbName});
} else if (hasLocalStorage()) {
localStorage[dbName] = (localStorage[dbName] === "a") ? "b" : "a";
}
};
Changes$1.prototype.notify = function (dbName) {
this.emit(dbName);
this.notifyLocalWindows(dbName);
};
function slowJsonParse(str) {
try {
return JSON.parse(str);
} catch (e) {
/* istanbul ignore next */
return vuvuzela.parse(str);
}
}
function safeJsonParse(str) {
// try/catch is deoptimized in V8, leading to slower
// times than we'd like to have. Most documents are _not_
// huge, and do not require a slower code path just to parse them.
// We can be pretty sure that a document under 50000 characters
// will not be so deeply nested as to throw a stack overflow error
// (depends on the engine and available memory, though, so this is
// just a hunch). 50000 was chosen based on the average length
// of this string in our test suite, to try to find a number that covers
// most of our test cases (26 over this size, 26378 under it).
if (str.length < 50000) {
return JSON.parse(str);
}
return slowJsonParse(str);
}
function safeJsonStringify(json) {
try {
return JSON.stringify(json);
} catch (e) {
/* istanbul ignore next */
return vuvuzela.stringify(json);
}
}
// compact a tree by marking its non-leafs as missing,
// and return a list of revs to delete
function compactTree(metadata) {
var revs = [];
traverseRevTree(metadata.rev_tree, function (isLeaf, pos,
revHash, ctx, opts) {
if (opts.status === 'available' && !isLeaf) {
revs.push(pos + '-' + revHash);
opts.status = 'missing';
}
});
return revs;
}
function sortByPos$1(a, b) {
return a.pos - b.pos;
}
// classic binary search
function binarySearch(arr, item, comparator) {
var low = 0;
var high = arr.length;
var mid;
while (low < high) {
mid = (low + high) >>> 1;
if (comparator(arr[mid], item) < 0) {
low = mid + 1;
} else {
high = mid;
}
}
return low;
}
// assuming the arr is sorted, insert the item in the proper place
function insertSorted(arr, item, comparator) {
var idx = binarySearch(arr, item, comparator);
arr.splice(idx, 0, item);
}
// Turn a path as a flat array into a tree with a single branch.
// If any should be stemmed from the beginning of the array, that's passed
// in as the second argument
function pathToTree(path, numStemmed) {
var root;
var leaf;
for (var i = numStemmed, len = path.length; i < len; i++) {
var node = path[i];
var currentLeaf = [node.id, node.opts, []];
if (leaf) {
leaf[2].push(currentLeaf);
leaf = currentLeaf;
} else {
root = leaf = currentLeaf;
}
}
return root;
}
// compare the IDs of two trees
function compareTree(a, b) {
return a[0] < b[0] ? -1 : 1;
}
// Merge two trees together
// The roots of tree1 and tree2 must be the same revision
function mergeTree(in_tree1, in_tree2) {
var queue = [{tree1: in_tree1, tree2: in_tree2}];
var conflicts = false;
while (queue.length > 0) {
var item = queue.pop();
var tree1 = item.tree1;
var tree2 = item.tree2;
if (tree1[1].status || tree2[1].status) {
tree1[1].status =
(tree1[1].status === 'available' ||
tree2[1].status === 'available') ? 'available' : 'missing';
}
for (var i = 0; i < tree2[2].length; i++) {
if (!tree1[2][0]) {
conflicts = 'new_leaf';
tree1[2][0] = tree2[2][i];
continue;
}
var merged = false;
for (var j = 0; j < tree1[2].length; j++) {
if (tree1[2][j][0] === tree2[2][i][0]) {
queue.push({tree1: tree1[2][j], tree2: tree2[2][i]});
merged = true;
}
}
if (!merged) {
conflicts = 'new_branch';
insertSorted(tree1[2], tree2[2][i], compareTree);
}
}
}
return {conflicts: conflicts, tree: in_tree1};
}
function doMerge(tree, path, dontExpand) {
var restree = [];
var conflicts = false;
var merged = false;
var res;
if (!tree.length) {
return {tree: [path], conflicts: 'new_leaf'};
}
for (var i = 0, len = tree.length; i < len; i++) {
var branch = tree[i];
if (branch.pos === path.pos && branch.ids[0] === path.ids[0]) {
// Paths start at the same position and have the same root, so they need
// merged
res = mergeTree(branch.ids, path.ids);
restree.push({pos: branch.pos, ids: res.tree});
conflicts = conflicts || res.conflicts;
merged = true;
} else if (dontExpand !== true) {
// The paths start at a different position, take the earliest path and
// traverse up until it as at the same point from root as the path we
// want to merge. If the keys match we return the longer path with the
// other merged After stemming we dont want to expand the trees
var t1 = branch.pos < path.pos ? branch : path;
var t2 = branch.pos < path.pos ? path : branch;
var diff = t2.pos - t1.pos;
var candidateParents = [];
var trees = [];
trees.push({ids: t1.ids, diff: diff, parent: null, parentIdx: null});
while (trees.length > 0) {
var item = trees.pop();
if (item.diff === 0) {
if (item.ids[0] === t2.ids[0]) {
candidateParents.push(item);
}
continue;
}
var elements = item.ids[2];
for (var j = 0, elementsLen = elements.length; j < elementsLen; j++) {
trees.push({
ids: elements[j],
diff: item.diff - 1,
parent: item.ids,
parentIdx: j
});
}
}
var el = candidateParents[0];
if (!el) {
restree.push(branch);
} else {
res = mergeTree(el.ids, t2.ids);
el.parent[2][el.parentIdx] = res.tree;
restree.push({pos: t1.pos, ids: t1.ids});
conflicts = conflicts || res.conflicts;
merged = true;
}
} else {
restree.push(branch);
}
}
// We didnt find
if (!merged) {
restree.push(path);
}
restree.sort(sortByPos$1);
return {
tree: restree,
conflicts: conflicts || 'internal_node'
};
}
// To ensure we dont grow the revision tree infinitely, we stem old revisions
function stem(tree, depth) {
// First we break out the tree into a complete list of root to leaf paths
var paths = rootToLeaf(tree);
var maybeStem = {};
var result;
for (var i = 0, len = paths.length; i < len; i++) {
// Then for each path, we cut off the start of the path based on the
// `depth` to stem to, and generate a new set of flat trees
var path = paths[i];
var stemmed = path.ids;
var numStemmed = Math.max(0, stemmed.length - depth);
var stemmedNode = {
pos: path.pos + numStemmed,
ids: pathToTree(stemmed, numStemmed)
};
for (var s = 0; s < numStemmed; s++) {
var rev = (path.pos + s) + '-' + stemmed[s].id;
maybeStem[rev] = true;
}
// Then we remerge all those flat trees together, ensuring that we dont
// connect trees that would go beyond the depth limit
if (result) {
result = doMerge(result, stemmedNode, true).tree;
} else {
result = [stemmedNode];
}
}
traverseRevTree(result, function (isLeaf, pos, revHash) {
// some revisions may have been removed in a branch but not in another
delete maybeStem[pos + '-' + revHash];
});
return {
tree: result,
revs: Object.keys(maybeStem)
};
}
function merge(tree, path, depth) {
var newTree = doMerge(tree, path);
var stemmed = stem(newTree.tree, depth);
return {
tree: stemmed.tree,
stemmedRevs: stemmed.revs,
conflicts: newTree.conflicts
};
}
// return true if a rev exists in the rev tree, false otherwise
function revExists(revs, rev) {
var toVisit = revs.slice();
var splitRev = rev.split('-');
var targetPos = parseInt(splitRev[0], 10);
var targetId = splitRev[1];
var node;
while ((node = toVisit.pop())) {
if (node.pos === targetPos && node.ids[0] === targetId) {
return true;
}
var branches = node.ids[2];
for (var i = 0, len = branches.length; i < len; i++) {
toVisit.push({pos: node.pos + 1, ids: branches[i]});
}
}
return false;
}
function updateDoc(revLimit, prev, docInfo, results,
i, cb, writeDoc, newEdits) {
if (revExists(prev.rev_tree, docInfo.metadata.rev)) {
results[i] = docInfo;
return cb();
}
// sometimes this is pre-calculated. historically not always
var previousWinningRev = prev.winningRev || winningRev(prev);
var previouslyDeleted = 'deleted' in prev ? prev.deleted :
isDeleted(prev, previousWinningRev);
var deleted = 'deleted' in docInfo.metadata ? docInfo.metadata.deleted :
isDeleted(docInfo.metadata);
var isRoot = /^1-/.test(docInfo.metadata.rev);
if (previouslyDeleted && !deleted && newEdits && isRoot) {
var newDoc = docInfo.data;
newDoc._rev = previousWinningRev;
newDoc._id = docInfo.metadata.id;
docInfo = parseDoc(newDoc, newEdits);
}
var merged = merge(prev.rev_tree, docInfo.metadata.rev_tree[0], revLimit);
var inConflict = newEdits && (((previouslyDeleted && deleted) ||
(!previouslyDeleted && merged.conflicts !== 'new_leaf') ||
(previouslyDeleted && !deleted && merged.conflicts === 'new_branch')));
if (inConflict) {
var err = createError(REV_CONFLICT);
results[i] = err;
return cb();
}
var newRev = docInfo.metadata.rev;
docInfo.metadata.rev_tree = merged.tree;
docInfo.stemmedRevs = merged.stemmedRevs || [];
/* istanbul ignore else */
if (prev.rev_map) {
docInfo.metadata.rev_map = prev.rev_map; // used only by leveldb
}
// recalculate
var winningRev$$ = winningRev(docInfo.metadata);
var winningRevIsDeleted = isDeleted(docInfo.metadata, winningRev$$);
// calculate the total number of documents that were added/removed,
// from the perspective of total_rows/doc_count
var delta = (previouslyDeleted === winningRevIsDeleted) ? 0 :
previouslyDeleted < winningRevIsDeleted ? -1 : 1;
var newRevIsDeleted;
if (newRev === winningRev$$) {
// if the new rev is the same as the winning rev, we can reuse that value
newRevIsDeleted = winningRevIsDeleted;
} else {
// if they're not the same, then we need to recalculate
newRevIsDeleted = isDeleted(docInfo.metadata, newRev);
}
writeDoc(docInfo, winningRev$$, winningRevIsDeleted, newRevIsDeleted,
true, delta, i, cb);
}
function rootIsMissing(docInfo) {
return docInfo.metadata.rev_tree[0].ids[1].status === 'missing';
}
function processDocs(revLimit, docInfos, api, fetchedDocs, tx, results,
writeDoc, opts, overallCallback) {
// Default to 1000 locally
revLimit = revLimit || 1000;
function insertDoc(docInfo, resultsIdx, callback) {
// Cant insert new deleted documents
var winningRev$$ = winningRev(docInfo.metadata);
var deleted = isDeleted(docInfo.metadata, winningRev$$);
if ('was_delete' in opts && deleted) {
results[resultsIdx] = createError(MISSING_DOC, 'deleted');
return callback();
}
// 4712 - detect whether a new document was inserted with a _rev
var inConflict = newEdits && rootIsMissing(docInfo);
if (inConflict) {
var err = createError(REV_CONFLICT);
results[resultsIdx] = err;
return callback();
}
var delta = deleted ? 0 : 1;
writeDoc(docInfo, winningRev$$, deleted, deleted, false,
delta, resultsIdx, callback);
}
var newEdits = opts.new_edits;
var idsToDocs = new pouchdbCollections.Map();
var docsDone = 0;
var docsToDo = docInfos.length;
function checkAllDocsDone() {
if (++docsDone === docsToDo && overallCallback) {
overallCallback();
}
}
docInfos.forEach(function (currentDoc, resultsIdx) {
if (currentDoc._id && isLocalId(currentDoc._id)) {
var fun = currentDoc._deleted ? '_removeLocal' : '_putLocal';
api[fun](currentDoc, {ctx: tx}, function (err, res) {
results[resultsIdx] = err || res;
checkAllDocsDone();
});
return;
}
var id = currentDoc.metadata.id;
if (idsToDocs.has(id)) {
docsToDo--; // duplicate
idsToDocs.get(id).push([currentDoc, resultsIdx]);
} else {
idsToDocs.set(id, [[currentDoc, resultsIdx]]);
}
});
// in the case of new_edits, the user can provide multiple docs
// with the same id. these need to be processed sequentially
idsToDocs.forEach(function (docs, id) {
var numDone = 0;
function docWritten() {
if (++numDone < docs.length) {
nextDoc();
} else {
checkAllDocsDone();
}
}
function nextDoc() {
var value = docs[numDone];
var currentDoc = value[0];
var resultsIdx = value[1];
if (fetchedDocs.has(id)) {
updateDoc(revLimit, fetchedDocs.get(id), currentDoc, results,
resultsIdx, docWritten, writeDoc, newEdits);
} else {
// Ensure stemming applies to new writes as well
var merged = merge([], currentDoc.metadata.rev_tree[0], revLimit);
currentDoc.metadata.rev_tree = merged.tree;
currentDoc.stemmedRevs = merged.stemmedRevs || [];
insertDoc(currentDoc, resultsIdx, docWritten);
}
}
nextDoc();
});
}
var stores = [
'document-store',
'by-sequence',
'attach-store',
'attach-binary-store'
];
function formatSeq(n) {
return ('0000000000000000' + n).slice(-16);
}
var UPDATE_SEQ_KEY$1 = '_local_last_update_seq';
var DOC_COUNT_KEY$1 = '_local_doc_count';
var UUID_KEY$1 = '_local_uuid';
var toSublevel = function (name, db, callback) {
// local require to prevent crashing if leveldown isn't installed.
var leveldown = {};
var base = path.resolve(name);
function move(store, index, cb) {
var storePath = path.join(base, store);
var opts;
if (index === 3) {
opts = {
valueEncoding: 'binary'
};
} else {
opts = {
valueEncoding: 'json'
};
}
var sub = db.sublevel(store, opts);
var orig = levelup(storePath, opts);
var from = orig.createReadStream();
var writeStream = new LevelWriteStream(sub);
var to = writeStream();
from.on('end', function () {
orig.close(function (err) {
cb(err, storePath);
});
});
from.pipe(to);
}
fs.unlink(base + '.uuid', function (err) {
if (err) {
return callback();
}
var todo = 4;
var done = [];
stores.forEach(function (store, i) {
move(store, i, function (err, storePath) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
done.push(storePath);
if (!(--todo)) {
done.forEach(function (item) {
leveldown.destroy(item, function () {
if (++todo === done.length) {
fs.rmdir(base, callback);
}
});
});
}
});
});
});
};
var localAndMetaStores = function (db, stores, callback) {
var batches = [];
stores.bySeqStore.get(UUID_KEY$1, function (err, value) {
if (err) {
// no uuid key, so don't need to migrate;
return callback();
}
batches.push({
key: UUID_KEY$1,
value: value,
prefix: stores.metaStore,
type: 'put',
valueEncoding: 'json'
});
batches.push({
key: UUID_KEY$1,
prefix: stores.bySeqStore,
type: 'del'
});
stores.bySeqStore.get(DOC_COUNT_KEY$1, function (err, value) {
if (value) {
// if no doc count key,
// just skip
// we can live with this
batches.push({
key: DOC_COUNT_KEY$1,
value: value,
prefix: stores.metaStore,
type: 'put',
valueEncoding: 'json'
});
batches.push({
key: DOC_COUNT_KEY$1,
prefix: stores.bySeqStore,
type: 'del'
});
}
stores.bySeqStore.get(UPDATE_SEQ_KEY$1, function (err, value) {
if (value) {
// if no UPDATE_SEQ_KEY
// just skip
// we've gone to far to stop.
batches.push({
key: UPDATE_SEQ_KEY$1,
value: value,
prefix: stores.metaStore,
type: 'put',
valueEncoding: 'json'
});
batches.push({
key: UPDATE_SEQ_KEY$1,
prefix: stores.bySeqStore,
type: 'del'
});
}
var deletedSeqs = {};
stores.docStore.createReadStream({
startKey: '_',
endKey: '_\xFF'
}).pipe(through2.obj(function (ch, _, next) {
if (!isLocalId(ch.key)) {
return next();
}
batches.push({
key: ch.key,
prefix: stores.docStore,
type: 'del'
});
var winner = winningRev(ch.value);
Object.keys(ch.value.rev_map).forEach(function (key) {
if (key !== 'winner') {
this.push(formatSeq(ch.value.rev_map[key]));
}
}, this);
var winningSeq = ch.value.rev_map[winner];
stores.bySeqStore.get(formatSeq(winningSeq), function (err, value) {
if (!err) {
batches.push({
key: ch.key,
value: value,
prefix: stores.localStore,
type: 'put',
valueEncoding: 'json'
});
}
next();
});
})).pipe(through2.obj(function (seq, _, next) {
/* istanbul ignore if */
if (deletedSeqs[seq]) {
return next();
}
deletedSeqs[seq] = true;
stores.bySeqStore.get(seq, function (err, resp) {
/* istanbul ignore if */
if (err || !isLocalId(resp._id)) {
return next();
}
batches.push({
key: seq,
prefix: stores.bySeqStore,
type: 'del'
});
next();
});
}, function () {
db.batch(batches, callback);
}));
});
});
});
};
var migrate = {
toSublevel: toSublevel,
localAndMetaStores: localAndMetaStores
};
// shim for Function.prototype.name,
// for browsers that don't support it like IE
/* istanbul ignore next */
function f() {}
var hasName = f.name;
var res$2;
// We dont run coverage in IE
/* istanbul ignore else */
if (hasName) {
res$2 = function (fun) {
return fun.name;
};
} else {
res$2 = function (fun) {
return fun.toString().match(/^\s*function\s*(\S*)\s*\(/)[1];
};
}
var functionName = res$2;
function readAsBlobOrBuffer(storedObject, type) {
// In Node, we've stored a buffer
storedObject.type = type; // non-standard, but used for consistency
return storedObject;
}
// in Node, we store the buffer directly
function prepareAttachmentForStorage(attData, cb) {
process.nextTick(function () {
cb(attData);
});
}
function createEmptyBlobOrBuffer(type) {
return typedBuffer('', 'binary', type);
}
function getCacheFor(transaction, store) {
var prefix = store.prefix()[0];
var cache = transaction._cache;
var subCache = cache.get(prefix);
if (!subCache) {
subCache = new pouchdbCollections.Map();
cache.set(prefix, subCache);
}
return subCache;
}
function LevelTransaction() {
this._batch = [];
this._cache = new pouchdbCollections.Map();
}
LevelTransaction.prototype.get = function (store, key, callback) {
var cache = getCacheFor(this, store);
var exists = cache.get(key);
if (exists) {
return process.nextTick(function () {
callback(null, exists);
});
} else if (exists === null) { // deleted marker
/* istanbul ignore next */
return process.nextTick(function () {
callback({name: 'NotFoundError'});
});
}
store.get(key, function (err, res) {
if (err) {
/* istanbul ignore else */
if (err.name === 'NotFoundError') {
cache.set(key, null);
}
return callback(err);
}
cache.set(key, res);
callback(null, res);
});
};
LevelTransaction.prototype.batch = function (batch) {
for (var i = 0, len = batch.length; i < len; i++) {
var operation = batch[i];
var cache = getCacheFor(this, operation.prefix);
if (operation.type === 'put') {
cache.set(operation.key, operation.value);
} else {
cache.set(operation.key, null);
}
}
this._batch = this._batch.concat(batch);
};
LevelTransaction.prototype.execute = function (db, callback) {
var keys = new pouchdbCollections.Set();
var uniqBatches = [];
// remove duplicates; last one wins
for (var i = this._batch.length - 1; i >= 0; i--) {
var operation = this._batch[i];
var lookupKey = operation.prefix.prefix()[0] + '\xff' + operation.key;
if (keys.has(lookupKey)) {
continue;
}
keys.add(lookupKey);
uniqBatches.push(operation);
}
db.batch(uniqBatches, callback);
};
var DOC_STORE = 'document-store';
var BY_SEQ_STORE = 'by-sequence';
var ATTACHMENT_STORE = 'attach-store';
var BINARY_STORE = 'attach-binary-store';
var LOCAL_STORE = 'local-store';
var META_STORE = 'meta-store';
// leveldb barks if we try to open a db multiple times
// so we cache opened connections here for initstore()
var dbStores = new pouchdbCollections.Map();
// store the value of update_seq in the by-sequence store the key name will
// never conflict, since the keys in the by-sequence store are integers
var UPDATE_SEQ_KEY = '_local_last_update_seq';
var DOC_COUNT_KEY = '_local_doc_count';
var UUID_KEY = '_local_uuid';
var MD5_PREFIX = 'md5-';
var safeJsonEncoding = {
encode: safeJsonStringify,
decode: safeJsonParse,
buffer: false,
type: 'cheap-json'
};
var levelChanges = new Changes$1();
// require leveldown. provide verbose output on error as it is the default
// nodejs adapter, which we do not provide for the user
/* istanbul ignore next */
var requireLeveldown = function () {
try {
return {};
} catch (err) {
/* eslint no-ex-assign: 0*/
err = err || 'leveldown import error';
if (err.code === 'MODULE_NOT_FOUND') {
// handle leveldown not installed case
return new Error([
'the \'leveldown\' package is not available. install it, or,',
'specify another storage backend using the \'db\' option'
].join(' '));
} else if (err.message && err.message.match('Module version mismatch')) {
// handle common user enviornment error
return new Error([
err.message,
'This generally implies that leveldown was built with a different',
'version of node than that which is running now. You may try',
'fully removing and reinstalling PouchDB or leveldown to resolve.'
].join(' '));
}
// handle general internal nodejs require error
return new Error(err.toString() + ': unable to import leveldown');
}
};
// winningRev and deleted are performance-killers, but
// in newer versions of PouchDB, they are cached on the metadata
function getWinningRev(metadata) {
return 'winningRev' in metadata ?
metadata.winningRev : winningRev(metadata);
}
function getIsDeleted(metadata, winningRev) {
return 'deleted' in metadata ?
metadata.deleted : isDeleted(metadata, winningRev);
}
function fetchAttachment(att, stores, opts) {
var type = att.content_type;
return new PouchPromise(function (resolve, reject) {
stores.binaryStore.get(att.digest, function (err, buffer) {
var data;
if (err) {
/* istanbul ignore if */
if (err.name !== 'NotFoundError') {
return reject(err);
} else {
// empty
if (!opts.binary) {
data = '';
} else {
data = binStringToBluffer('', type);
}
}
} else { // non-empty
if (opts.binary) {
data = readAsBlobOrBuffer(buffer, type);
} else {
data = buffer.toString('base64');
}
}
delete att.stub;
delete att.length;
att.data = data;
resolve();
});
});
}
function fetchAttachments(results, stores, opts) {
var atts = [];
results.forEach(function (row) {
if (!(row.doc && row.doc._attachments)) {
return;
}
var attNames = Object.keys(row.doc._attachments);
attNames.forEach(function (attName) {
var att = row.doc._attachments[attName];
if (!('data' in att)) {
atts.push(att);
}
});
});
return PouchPromise.all(atts.map(function (att) {
return fetchAttachment(att, stores, opts);
}));
}
function LevelPouch(opts, callback) {
opts = clone(opts);
var api = this;
var instanceId;
var stores = {};
var revLimit = opts.revs_limit;
var db;
var name = opts.name;
if (typeof opts.createIfMissing === 'undefined') {
opts.createIfMissing = true;
}
var leveldown = opts.db || requireLeveldown();
/* istanbul ignore if */
if (leveldown instanceof Error) {
return callback(leveldown);
}
if (typeof leveldown.destroy !== 'function') {
/* istanbul ignore next */
leveldown.destroy = function (name, cb) { cb(); };
}
var dbStore;
var leveldownName = functionName(leveldown);
if (dbStores.has(leveldownName)) {
dbStore = dbStores.get(leveldownName);
} else {
dbStore = new pouchdbCollections.Map();
dbStores.set(leveldownName, dbStore);
}
if (dbStore.has(name)) {
db = dbStore.get(name);
afterDBCreated();
} else {
dbStore.set(name, sublevel(levelup(name, opts, function (err) {
/* istanbul ignore if */
if (err) {
dbStore.delete(name);
return callback(err);
}
db = dbStore.get(name);
db._docCount = -1;
db._queue = new Deque();
if (opts.db || opts.noMigrate) {
afterDBCreated();
} else {
migrate.toSublevel(name, db, afterDBCreated);
}
})));
}
function afterDBCreated() {
stores.docStore = db.sublevel(DOC_STORE, {valueEncoding: safeJsonEncoding});
stores.bySeqStore = db.sublevel(BY_SEQ_STORE, {valueEncoding: 'json'});
stores.attachmentStore =
db.sublevel(ATTACHMENT_STORE, {valueEncoding: 'json'});
stores.binaryStore = db.sublevel(BINARY_STORE, {valueEncoding: 'binary'});
stores.localStore = db.sublevel(LOCAL_STORE, {valueEncoding: 'json'});
stores.metaStore = db.sublevel(META_STORE, {valueEncoding: 'json'});
migrate.localAndMetaStores(db, stores, function () {
stores.metaStore.get(UPDATE_SEQ_KEY, function (err, value) {
if (typeof db._updateSeq === 'undefined') {
db._updateSeq = value || 0;
}
stores.metaStore.get(DOC_COUNT_KEY, function (err, value) {
db._docCount = !err ? value : 0;
stores.metaStore.get(UUID_KEY, function (err, value) {
instanceId = !err ? value : uuid();
stores.metaStore.put(UUID_KEY, instanceId, function () {
process.nextTick(function () {
callback(null, api);
});
});
});
});
});
});
}
function countDocs(callback) {
/* istanbul ignore if */
if (db.isClosed()) {
return callback(new Error('database is closed'));
}
return callback(null, db._docCount); // use cached value
}
api.type = function () {
return 'leveldb';
};
api._id = function (callback) {
callback(null, instanceId);
};
api._info = function (callback) {
var res = {
doc_count: db._docCount,
update_seq: db._updateSeq,
backend_adapter: functionName(leveldown)
};
return process.nextTick(function () {
callback(null, res);
});
};
function tryCode(fun, args) {
try {
fun.apply(null, args);
} catch (err) {
args[args.length - 1](err);
}
}
function executeNext() {
var firstTask = db._queue.peekFront();
if (firstTask.type === 'read') {
runReadOperation(firstTask);
} else { // write, only do one at a time
runWriteOperation(firstTask);
}
}
function runReadOperation(firstTask) {
// do multiple reads at once simultaneously, because it's safe
var readTasks = [firstTask];
var i = 1;
var nextTask = db._queue.get(i);
while (typeof nextTask !== 'undefined' && nextTask.type === 'read') {
readTasks.push(nextTask);
i++;
nextTask = db._queue.get(i);
}
var numDone = 0;
readTasks.forEach(function (readTask) {
var args = readTask.args;
var callback = args[args.length - 1];
args[args.length - 1] = getArguments(function (cbArgs) {
callback.apply(null, cbArgs);
if (++numDone === readTasks.length) {
process.nextTick(function () {
// all read tasks have finished
readTasks.forEach(function () {
db._queue.shift();
});
if (db._queue.length) {
executeNext();
}
});
}
});
tryCode(readTask.fun, args);
});
}
function runWriteOperation(firstTask) {
var args = firstTask.args;
var callback = args[args.length - 1];
args[args.length - 1] = getArguments(function (cbArgs) {
callback.apply(null, cbArgs);
process.nextTick(function () {
db._queue.shift();
if (db._queue.length) {
executeNext();
}
});
});
tryCode(firstTask.fun, args);
}
// all read/write operations to the database are done in a queue,
// similar to how websql/idb works. this avoids problems such
// as e.g. compaction needing to have a lock on the database while
// it updates stuff. in the future we can revisit this.
function writeLock(fun) {
return getArguments(function (args) {
db._queue.push({
fun: fun,
args: args,
type: 'write'
});
if (db._queue.length === 1) {
process.nextTick(executeNext);
}
});
}
// same as the writelock, but multiple can run at once
function readLock(fun) {
return getArguments(function (args) {
db._queue.push({
fun: fun,
args: args,
type: 'read'
});
if (db._queue.length === 1) {
process.nextTick(executeNext);
}
});
}
function formatSeq(n) {
return ('0000000000000000' + n).slice(-16);
}
function parseSeq(s) {
return parseInt(s, 10);
}
api._get = readLock(function (id, opts, callback) {
opts = clone(opts);
stores.docStore.get(id, function (err, metadata) {
if (err || !metadata) {
return callback(createError(MISSING_DOC, 'missing'));
}
var rev = getWinningRev(metadata);
var deleted = getIsDeleted(metadata, rev);
if (deleted && !opts.rev) {
return callback(createError(MISSING_DOC, "deleted"));
}
rev = opts.rev ? opts.rev : rev;
var seq = metadata.rev_map[rev];
stores.bySeqStore.get(formatSeq(seq), function (err, doc) {
if (!doc) {
return callback(createError(MISSING_DOC));
}
/* istanbul ignore if */
if ('_id' in doc && doc._id !== metadata.id) {
// this failing implies something very wrong
return callback(new Error('wrong doc returned'));
}
doc._id = metadata.id;
if ('_rev' in doc) {
/* istanbul ignore if */
if (doc._rev !== rev) {
// this failing implies something very wrong
return callback(new Error('wrong doc returned'));
}
} else {
// we didn't always store this
doc._rev = rev;
}
return callback(null, {doc: doc, metadata: metadata});
});
});
});
// not technically part of the spec, but if putAttachment has its own
// method...
api._getAttachment = function (attachment, opts, callback) {
var digest = attachment.digest;
var type = attachment.content_type;
stores.binaryStore.get(digest, function (err, attach) {
if (err) {
/* istanbul ignore if */
if (err.name !== 'NotFoundError') {
return callback(err);
}
// Empty attachment
return callback(null, opts.binary ? createEmptyBlobOrBuffer(type) : '');
}
if (opts.binary) {
callback(null, readAsBlobOrBuffer(attach, type));
} else {
callback(null, attach.toString('base64'));
}
});
};
api._bulkDocs = writeLock(function (req, opts, callback) {
var newEdits = opts.new_edits;
var results = new Array(req.docs.length);
var fetchedDocs = new pouchdbCollections.Map();
var stemmedRevs = new pouchdbCollections.Map();
var txn = new LevelTransaction();
var docCountDelta = 0;
var newUpdateSeq = db._updateSeq;
// parse the docs and give each a sequence number
var userDocs = req.docs;
var docInfos = userDocs.map(function (doc) {
if (doc._id && isLocalId(doc._id)) {
return doc;
}
var newDoc = parseDoc(doc, newEdits);
if (newDoc.metadata && !newDoc.metadata.rev_map) {
newDoc.metadata.rev_map = {};
}
return newDoc;
});
var infoErrors = docInfos.filter(function (doc) {
return doc.error;
});
if (infoErrors.length) {
return callback(infoErrors[0]);
}
// verify any stub attachments as a precondition test
function verifyAttachment(digest, callback) {
txn.get(stores.attachmentStore, digest, function (levelErr) {
if (levelErr) {
var err = createError(MISSING_STUB,
'unknown stub attachment with digest ' +
digest);
callback(err);
} else {
callback();
}
});
}
function verifyAttachments(finish) {
var digests = [];
userDocs.forEach(function (doc) {
if (doc && doc._attachments) {
Object.keys(doc._attachments).forEach(function (filename) {
var att = doc._attachments[filename];
if (att.stub) {
digests.push(att.digest);
}
});
}
});
if (!digests.length) {
return finish();
}
var numDone = 0;
var err;
digests.forEach(function (digest) {
verifyAttachment(digest, function (attErr) {
if (attErr && !err) {
err = attErr;
}
if (++numDone === digests.length) {
finish(err);
}
});
});
}
function fetchExistingDocs(finish) {
var numDone = 0;
var overallErr;
function checkDone() {
if (++numDone === userDocs.length) {
return finish(overallErr);
}
}
userDocs.forEach(function (doc) {
if (doc._id && isLocalId(doc._id)) {
// skip local docs
return checkDone();
}
txn.get(stores.docStore, doc._id, function (err, info) {
if (err) {
/* istanbul ignore if */
if (err.name !== 'NotFoundError') {
overallErr = err;
}
} else {
fetchedDocs.set(doc._id, info);
}
checkDone();
});
});
}
function compact(revsMap, callback) {
var promise = PouchPromise.resolve();
revsMap.forEach(function (revs, docId) {
// TODO: parallelize, for now need to be sequential to
// pass orphaned attachment tests
promise = promise.then(function () {
return new PouchPromise(function (resolve, reject) {
api._doCompactionNoLock(docId, revs, {ctx: txn}, function (err) {
/* istanbul ignore if */
if (err) {
return reject(err);
}
resolve();
});
});
});
});
promise.then(function () {
callback();
}, callback);
}
function autoCompact(callback) {
var revsMap = new pouchdbCollections.Map();
fetchedDocs.forEach(function (metadata, docId) {
revsMap.set(docId, compactTree(metadata));
});
compact(revsMap, callback);
}
function finish() {
if (api.auto_compaction) {
return autoCompact(complete);
} else {
compact(stemmedRevs, complete);
}
}
function writeDoc(docInfo, winningRev, winningRevIsDeleted, newRevIsDeleted,
isUpdate, delta, resultsIdx, callback2) {
docCountDelta += delta;
var err = null;
var recv = 0;
docInfo.metadata.winningRev = winningRev;
docInfo.metadata.deleted = winningRevIsDeleted;
docInfo.data._id = docInfo.metadata.id;
docInfo.data._rev = docInfo.metadata.rev;
if (newRevIsDeleted) {
docInfo.data._deleted = true;
}
if (docInfo.stemmedRevs.length) {
stemmedRevs.set(docInfo.metadata.id, docInfo.stemmedRevs);
}
var attachments = docInfo.data._attachments ?
Object.keys(docInfo.data._attachments) :
[];
function attachmentSaved(attachmentErr) {
recv++;
if (!err) {
/* istanbul ignore if */
if (attachmentErr) {
err = attachmentErr;
callback2(err);
} else if (recv === attachments.length) {
finish();
}
}
}
function onMD5Load(doc, key, data, attachmentSaved) {
return function (result) {
saveAttachment(doc, MD5_PREFIX + result, key, data, attachmentSaved);
};
}
function doMD5(doc, key, attachmentSaved) {
return function (data) {
res$1(data).then(
onMD5Load(doc, key, data, attachmentSaved)
);
};
}
for (var i = 0; i < attachments.length; i++) {
var key = attachments[i];
var att = docInfo.data._attachments[key];
if (att.stub) {
// still need to update the refs mapping
var id = docInfo.data._id;
var rev = docInfo.data._rev;
saveAttachmentRefs(id, rev, att.digest, attachmentSaved);
continue;
}
var data;
if (typeof att.data === 'string') {
// input is assumed to be a base64 string
try {
data = atob(att.data);
} catch (e) {
callback(createError(BAD_ARG,
'Attachment is not a valid base64 string'));
return;
}
doMD5(docInfo, key, attachmentSaved)(data);
} else {
prepareAttachmentForStorage(att.data,
doMD5(docInfo, key, attachmentSaved));
}
}
function finish() {
var seq = docInfo.metadata.rev_map[docInfo.metadata.rev];
/* istanbul ignore if */
if (seq) {
// check that there aren't any existing revisions with the same
// revision id, else we shouldn't do anything
return callback2(null, docInfo.revsStemmed);
}
seq = ++newUpdateSeq;
docInfo.metadata.rev_map[docInfo.metadata.rev] =
docInfo.metadata.seq = seq;
var seqKey = formatSeq(seq);
var batch = [{
key: seqKey,
value: docInfo.data,
prefix: stores.bySeqStore,
type: 'put'
}, {
key: docInfo.metadata.id,
value: docInfo.metadata,
prefix: stores.docStore,
type: 'put'
}];
txn.batch(batch);
results[resultsIdx] = {
ok: true,
id: docInfo.metadata.id,
rev: winningRev
};
fetchedDocs.set(docInfo.metadata.id, docInfo.metadata);
callback2(null, docInfo.revsStemmed);
}
if (!attachments.length) {
finish();
}
}
// attachments are queued per-digest, otherwise the refs could be
// overwritten by concurrent writes in the same bulkDocs session
var attachmentQueues = {};
function saveAttachmentRefs(id, rev, digest, callback) {
function fetchAtt() {
return new PouchPromise(function (resolve, reject) {
txn.get(stores.attachmentStore, digest, function (err, oldAtt) {
/* istanbul ignore if */
if (err && err.name !== 'NotFoundError') {
return reject(err);
}
resolve(oldAtt);
});
});
}
function saveAtt(oldAtt) {
var ref = [id, rev].join('@');
var newAtt = {};
if (oldAtt) {
if (oldAtt.refs) {
// only update references if this attachment already has them
// since we cannot migrate old style attachments here without
// doing a full db scan for references
newAtt.refs = oldAtt.refs;
newAtt.refs[ref] = true;
}
} else {
newAtt.refs = {};
newAtt.refs[ref] = true;
}
return new PouchPromise(function (resolve) {
txn.batch([{
type: 'put',
prefix: stores.attachmentStore,
key: digest,
value: newAtt
}]);
resolve(!oldAtt);
});
}
// put attachments in a per-digest queue, to avoid two docs with the same
// attachment overwriting each other
var queue = attachmentQueues[digest] || PouchPromise.resolve();
attachmentQueues[digest] = queue.then(function () {
return fetchAtt().then(saveAtt).then(function (isNewAttachment) {
callback(null, isNewAttachment);
}, callback);
});
}
function saveAttachment(docInfo, digest, key, data, callback) {
var att = docInfo.data._attachments[key];
delete att.data;
att.digest = digest;
att.length = data.length;
var id = docInfo.metadata.id;
var rev = docInfo.metadata.rev;
att.revpos = parseInt(rev, 10);
saveAttachmentRefs(id, rev, digest, function (err, isNewAttachment) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
// do not try to store empty attachments
if (data.length === 0) {
return callback(err);
}
if (!isNewAttachment) {
// small optimization - don't bother writing it again
return callback(err);
}
txn.batch([{
type: 'put',
prefix: stores.binaryStore,
key: digest,
value: new Buffer(data, 'binary')
}]);
callback();
});
}
function complete(err) {
/* istanbul ignore if */
if (err) {
return process.nextTick(function () {
callback(err);
});
}
txn.batch([
{
prefix: stores.metaStore,
type: 'put',
key: UPDATE_SEQ_KEY,
value: newUpdateSeq
},
{
prefix: stores.metaStore,
type: 'put',
key: DOC_COUNT_KEY,
value: db._docCount + docCountDelta
}
]);
txn.execute(db, function (err) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
db._docCount += docCountDelta;
db._updateSeq = newUpdateSeq;
levelChanges.notify(name);
process.nextTick(function () {
callback(null, results);
});
});
}
if (!docInfos.length) {
return callback(null, []);
}
verifyAttachments(function (err) {
if (err) {
return callback(err);
}
fetchExistingDocs(function (err) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
processDocs(revLimit, docInfos, api, fetchedDocs, txn, results,
writeDoc, opts, finish);
});
});
});
api._allDocs = readLock(function (opts, callback) {
opts = clone(opts);
countDocs(function (err, docCount) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
var readstreamOpts = {};
var skip = opts.skip || 0;
if (opts.startkey) {
readstreamOpts.gte = opts.startkey;
}
if (opts.endkey) {
readstreamOpts.lte = opts.endkey;
}
if (opts.key) {
readstreamOpts.gte = readstreamOpts.lte = opts.key;
}
if (opts.descending) {
readstreamOpts.reverse = true;
// switch start and ends
var tmp = readstreamOpts.lte;
readstreamOpts.lte = readstreamOpts.gte;
readstreamOpts.gte = tmp;
}
var limit;
if (typeof opts.limit === 'number') {
limit = opts.limit;
}
if (limit === 0 ||
('start' in readstreamOpts && 'end' in readstreamOpts &&
readstreamOpts.start > readstreamOpts.end)) {
// should return 0 results when start is greater than end.
// normally level would "fix" this for us by reversing the order,
// so short-circuit instead
return callback(null, {
total_rows: docCount,
offset: opts.skip,
rows: []
});
}
var results = [];
var docstream = stores.docStore.readStream(readstreamOpts);
var throughStream = through2.obj(function (entry, _, next) {
var metadata = entry.value;
// winningRev and deleted are performance-killers, but
// in newer versions of PouchDB, they are cached on the metadata
var winningRev = getWinningRev(metadata);
var deleted = getIsDeleted(metadata, winningRev);
if (!deleted) {
if (skip-- > 0) {
next();
return;
} else if (typeof limit === 'number' && limit-- <= 0) {
docstream.unpipe();
docstream.destroy();
next();
return;
}
} else if (opts.deleted !== 'ok') {
next();
return;
}
function allDocsInner(data) {
var doc = {
id: metadata.id,
key: metadata.id,
value: {
rev: winningRev
}
};
if (opts.include_docs) {
doc.doc = data;
doc.doc._rev = doc.value.rev;
if (opts.conflicts) {
doc.doc._conflicts = collectConflicts(metadata);
}
for (var att in doc.doc._attachments) {
if (doc.doc._attachments.hasOwnProperty(att)) {
doc.doc._attachments[att].stub = true;
}
}
}
if (opts.inclusive_end === false && metadata.id === opts.endkey) {
return next();
} else if (deleted) {
if (opts.deleted === 'ok') {
doc.value.deleted = true;
doc.doc = null;
} else {
/* istanbul ignore next */
return next();
}
}
results.push(doc);
next();
}
if (opts.include_docs) {
var seq = metadata.rev_map[winningRev];
stores.bySeqStore.get(formatSeq(seq), function (err, data) {
allDocsInner(data);
});
}
else {
allDocsInner();
}
}, function (next) {
PouchPromise.resolve().then(function () {
if (opts.include_docs && opts.attachments) {
return fetchAttachments(results, stores, opts);
}
}).then(function () {
callback(null, {
total_rows: docCount,
offset: opts.skip,
rows: results
});
}, callback);
next();
}).on('unpipe', function () {
throughStream.end();
});
docstream.on('error', callback);
docstream.pipe(throughStream);
});
});
api._changes = function (opts) {
opts = clone(opts);
if (opts.continuous) {
var id = name + ':' + uuid();
levelChanges.addListener(name, id, api, opts);
levelChanges.notify(name);
return {
cancel: function () {
levelChanges.removeListener(name, id);
}
};
}
var descending = opts.descending;
var results = [];
var lastSeq = opts.since || 0;
var called = 0;
var streamOpts = {
reverse: descending
};
var limit;
if ('limit' in opts && opts.limit > 0) {
limit = opts.limit;
}
if (!streamOpts.reverse) {
streamOpts.start = formatSeq(opts.since || 0);
}
var docIds = opts.doc_ids && new pouchdbCollections.Set(opts.doc_ids);
var filter = filterChange(opts);
var docIdsToMetadata = new pouchdbCollections.Map();
var returnDocs;
if ('return_docs' in opts) {
returnDocs = opts.return_docs;
} else if ('returnDocs' in opts) {
// TODO: Remove 'returnDocs' in favor of 'return_docs' in a future release
returnDocs = opts.returnDocs;
} else {
returnDocs = true;
}
function complete() {
opts.done = true;
if (returnDocs && opts.limit) {
/* istanbul ignore if */
if (opts.limit < results.length) {
results.length = opts.limit;
}
}
changeStream.unpipe(throughStream);
changeStream.destroy();
if (!opts.continuous && !opts.cancelled) {
if (opts.include_docs && opts.attachments) {
fetchAttachments(results, stores, opts).then(function () {
opts.complete(null, {results: results, last_seq: lastSeq});
});
} else {
opts.complete(null, {results: results, last_seq: lastSeq});
}
}
}
var changeStream = stores.bySeqStore.readStream(streamOpts);
var throughStream = through2.obj(function (data, _, next) {
if (limit && called >= limit) {
complete();
return next();
}
if (opts.cancelled || opts.done) {
return next();
}
var seq = parseSeq(data.key);
var doc = data.value;
if (seq === opts.since && !descending) {
// couchdb ignores `since` if descending=true
return next();
}
if (docIds && !docIds.has(doc._id)) {
return next();
}
var metadata;
function onGetMetadata(metadata) {
var winningRev = getWinningRev(metadata);
function onGetWinningDoc(winningDoc) {
var change = opts.processChange(winningDoc, metadata, opts);
change.seq = metadata.seq;
var filtered = filter(change);
if (typeof filtered === 'object') {
return opts.complete(filtered);
}
if (filtered) {
called++;
if (opts.attachments && opts.include_docs) {
// fetch attachment immediately for the benefit
// of live listeners
fetchAttachments([change], stores, opts).then(function () {
opts.onChange(change);
});
} else {
opts.onChange(change);
}
if (returnDocs) {
results.push(change);
}
}
next();
}
if (metadata.seq !== seq) {
// some other seq is later
return next();
}
lastSeq = seq;
if (winningRev === doc._rev) {
return onGetWinningDoc(doc);
}
// fetch the winner
var winningSeq = metadata.rev_map[winningRev];
stores.bySeqStore.get(formatSeq(winningSeq), function (err, doc) {
onGetWinningDoc(doc);
});
}
metadata = docIdsToMetadata.get(doc._id);
if (metadata) { // cached
return onGetMetadata(metadata);
}
// metadata not cached, have to go fetch it
stores.docStore.get(doc._id, function (err, metadata) {
/* istanbul ignore if */
if (opts.cancelled || opts.done || db.isClosed() ||
isLocalId(metadata.id)) {
return next();
}
docIdsToMetadata.set(doc._id, metadata);
onGetMetadata(metadata);
});
}, function (next) {
if (opts.cancelled) {
return next();
}
if (returnDocs && opts.limit) {
/* istanbul ignore if */
if (opts.limit < results.length) {
results.length = opts.limit;
}
}
next();
}).on('unpipe', function () {
throughStream.end();
complete();
});
changeStream.pipe(throughStream);
return {
cancel: function () {
opts.cancelled = true;
complete();
}
};
};
api._close = function (callback) {
/* istanbul ignore if */
if (db.isClosed()) {
return callback(createError(NOT_OPEN));
}
db.close(function (err) {
/* istanbul ignore if */
if (err) {
callback(err);
} else {
dbStore.delete(name);
callback();
}
});
};
api._getRevisionTree = function (docId, callback) {
stores.docStore.get(docId, function (err, metadata) {
if (err) {
callback(createError(MISSING_DOC));
} else {
callback(null, metadata.rev_tree);
}
});
};
api._doCompaction = writeLock(function (docId, revs, opts, callback) {
api._doCompactionNoLock(docId, revs, opts, callback);
});
// the NoLock version is for use by bulkDocs
api._doCompactionNoLock = function (docId, revs, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (!revs.length) {
return callback();
}
var txn = opts.ctx || new LevelTransaction();
txn.get(stores.docStore, docId, function (err, metadata) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
var seqs = revs.map(function (rev) {
var seq = metadata.rev_map[rev];
delete metadata.rev_map[rev];
return seq;
});
traverseRevTree(metadata.rev_tree, function (isLeaf, pos,
revHash, ctx, opts) {
var rev = pos + '-' + revHash;
if (revs.indexOf(rev) !== -1) {
opts.status = 'missing';
}
});
var batch = [];
batch.push({
key: metadata.id,
value: metadata,
type: 'put',
prefix: stores.docStore
});
var digestMap = {};
var numDone = 0;
var overallErr;
function checkDone(err) {
/* istanbul ignore if */
if (err) {
overallErr = err;
}
if (++numDone === revs.length) { // done
/* istanbul ignore if */
if (overallErr) {
return callback(overallErr);
}
deleteOrphanedAttachments();
}
}
function finish(err) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
txn.batch(batch);
if (opts.ctx) {
// don't execute immediately
return callback();
}
txn.execute(db, callback);
}
function deleteOrphanedAttachments() {
var possiblyOrphanedAttachments = Object.keys(digestMap);
if (!possiblyOrphanedAttachments.length) {
return finish();
}
var numDone = 0;
var overallErr;
function checkDone(err) {
/* istanbul ignore if */
if (err) {
overallErr = err;
}
if (++numDone === possiblyOrphanedAttachments.length) {
finish(overallErr);
}
}
var refsToDelete = new pouchdbCollections.Map();
revs.forEach(function (rev) {
refsToDelete.set(docId + '@' + rev, true);
});
possiblyOrphanedAttachments.forEach(function (digest) {
txn.get(stores.attachmentStore, digest, function (err, attData) {
/* istanbul ignore if */
if (err) {
if (err.name === 'NotFoundError') {
return checkDone();
} else {
return checkDone(err);
}
}
var refs = Object.keys(attData.refs || {}).filter(function (ref) {
return !refsToDelete.has(ref);
});
var newRefs = {};
refs.forEach(function (ref) {
newRefs[ref] = true;
});
if (refs.length) { // not orphaned
batch.push({
key: digest,
type: 'put',
value: {refs: newRefs},
prefix: stores.attachmentStore
});
} else { // orphaned, can safely delete
batch = batch.concat([{
key: digest,
type: 'del',
prefix: stores.attachmentStore
}, {
key: digest,
type: 'del',
prefix: stores.binaryStore
}]);
}
checkDone();
});
});
}
seqs.forEach(function (seq) {
batch.push({
key: formatSeq(seq),
type: 'del',
prefix: stores.bySeqStore
});
txn.get(stores.bySeqStore, formatSeq(seq), function (err, doc) {
/* istanbul ignore if */
if (err) {
if (err.name === 'NotFoundError') {
return checkDone();
} else {
return checkDone(err);
}
}
var atts = Object.keys(doc._attachments || {});
atts.forEach(function (attName) {
var digest = doc._attachments[attName].digest;
digestMap[digest] = true;
});
checkDone();
});
});
});
};
api._getLocal = function (id, callback) {
stores.localStore.get(id, function (err, doc) {
if (err) {
callback(createError(MISSING_DOC));
} else {
callback(null, doc);
}
});
};
api._putLocal = function (doc, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (opts.ctx) {
api._putLocalNoLock(doc, opts, callback);
} else {
api._putLocalWithLock(doc, opts, callback);
}
};
api._putLocalWithLock = writeLock(function (doc, opts, callback) {
api._putLocalNoLock(doc, opts, callback);
});
// the NoLock version is for use by bulkDocs
api._putLocalNoLock = function (doc, opts, callback) {
delete doc._revisions; // ignore this, trust the rev
var oldRev = doc._rev;
var id = doc._id;
var txn = opts.ctx || new LevelTransaction();
txn.get(stores.localStore, id, function (err, resp) {
if (err && oldRev) {
return callback(createError(REV_CONFLICT));
}
if (resp && resp._rev !== oldRev) {
return callback(createError(REV_CONFLICT));
}
doc._rev =
oldRev ? '0-' + (parseInt(oldRev.split('-')[1], 10) + 1) : '0-1';
var batch = [
{
type: 'put',
prefix: stores.localStore,
key: id,
value: doc
}
];
txn.batch(batch);
var ret = {ok: true, id: doc._id, rev: doc._rev};
if (opts.ctx) {
// don't execute immediately
return callback(null, ret);
}
txn.execute(db, function (err) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
callback(null, ret);
});
});
};
api._removeLocal = function (doc, opts, callback) {
if (typeof opts === 'function') {
callback = opts;
opts = {};
}
if (opts.ctx) {
api._removeLocalNoLock(doc, opts, callback);
} else {
api._removeLocalWithLock(doc, opts, callback);
}
};
api._removeLocalWithLock = writeLock(function (doc, opts, callback) {
api._removeLocalNoLock(doc, opts, callback);
});
// the NoLock version is for use by bulkDocs
api._removeLocalNoLock = function (doc, opts, callback) {
var txn = opts.ctx || new LevelTransaction();
txn.get(stores.localStore, doc._id, function (err, resp) {
if (err) {
/* istanbul ignore if */
if (err.name !== 'NotFoundError') {
return callback(err);
} else {
return callback(createError(MISSING_DOC));
}
}
if (resp._rev !== doc._rev) {
return callback(createError(REV_CONFLICT));
}
txn.batch([{
prefix: stores.localStore,
type: 'del',
key: doc._id
}]);
var ret = {ok: true, id: doc._id, rev: '0-0'};
if (opts.ctx) {
// don't execute immediately
return callback(null, ret);
}
txn.execute(db, function (err) {
/* istanbul ignore if */
if (err) {
return callback(err);
}
callback(null, ret);
});
});
};
// close and delete open leveldb stores
api._destroy = function (opts, callback) {
var dbStore;
var leveldownName = functionName(leveldown);
/* istanbul ignore else */
if (dbStores.has(leveldownName)) {
dbStore = dbStores.get(leveldownName);
} else {
return callDestroy(name, callback);
}
/* istanbul ignore else */
if (dbStore.has(name)) {
levelChanges.removeAllListeners(name);
dbStore.get(name).close(function () {
dbStore.delete(name);
callDestroy(name, callback);
});
} else {
callDestroy(name, callback);
}
};
function callDestroy(name, cb) {
/* istanbul ignore else */
if (typeof leveldown.destroy === 'function') {
leveldown.destroy(name, cb);
} else {
process.nextTick(cb);
}
}
}
LevelPouch.valid = function () {
// this gets overriden by the *down-based browser adapters
return true;
};
LevelPouch.use_prefix = false;
var adapters = {
leveldb: LevelPouch
};
PouchDB.ajax = ajax;
PouchDB.utils = utils;
PouchDB.Errors = allErrors;
PouchDB.replicate = replication.replicate;
PouchDB.sync = sync;
PouchDB.version = '5.3.2'; // will be automatically supplied by build.sh
PouchDB.adapter('http', HttpPouch);
PouchDB.adapter('https', HttpPouch);
PouchDB.plugin(mapreduce);
Object.keys(adapters).forEach(function (adapterName) {
PouchDB.adapter(adapterName, adapters[adapterName], true);
});
var WebSqlPouch = require('./pouchdb-websql');
PouchDB.adapter('websql', WebSqlPouch, true);
PouchDB.preferredAdapters = ['websql'];
module.exports = PouchDB;
/* jshint ignore:end */