101 lines
3.0 KiB
JavaScript
101 lines
3.0 KiB
JavaScript
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var QRCode = require('./../vendor/QRCode'),
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QRErrorCorrectLevel = require('./../vendor/QRCode/QRErrorCorrectLevel'),
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black = "\033[40m \033[0m",
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white = "\033[47m \033[0m",
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toCell = function (isBlack) {
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return isBlack ? black : white;
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},
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repeat = function (color) {
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return {
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times: function (count) {
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return new Array(count).join(color);
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}
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};
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},
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fill = function(length, value) {
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var arr = new Array(length);
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for (var i = 0; i < length; i++) {
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arr[i] = value;
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}
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return arr;
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};
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module.exports = {
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error: QRErrorCorrectLevel.L,
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generate: function (input, opts, cb) {
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if (typeof opts === 'function') {
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cb = opts;
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opts = {};
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}
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var qrcode = new QRCode(-1, this.error);
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qrcode.addData(input);
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qrcode.make();
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var output = '';
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if (opts && opts.small) {
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var BLACK = true, WHITE = false;
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var moduleCount = qrcode.getModuleCount();
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var moduleData = qrcode.modules.slice();
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var oddRow = moduleCount % 2 === 1;
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if (oddRow) {
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moduleData.push(fill(moduleCount, WHITE));
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}
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var platte= {
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WHITE_ALL: '\u2588',
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WHITE_BLACK: '\u2580',
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BLACK_WHITE: '\u2584',
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BLACK_ALL: ' ',
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};
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var borderTop = repeat(platte.BLACK_WHITE).times(moduleCount + 3);
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var borderBottom = repeat(platte.WHITE_BLACK).times(moduleCount + 3);
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output += borderTop + '\n';
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for (var row = 0; row < moduleCount; row += 2) {
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output += platte.WHITE_ALL;
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for (var col = 0; col < moduleCount; col++) {
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if (moduleData[row][col] === WHITE && moduleData[row + 1][col] === WHITE) {
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output += platte.WHITE_ALL;
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} else if (moduleData[row][col] === WHITE && moduleData[row + 1][col] === BLACK) {
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output += platte.WHITE_BLACK;
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} else if (moduleData[row][col] === BLACK && moduleData[row + 1][col] === WHITE) {
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output += platte.BLACK_WHITE;
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} else {
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output += platte.BLACK_ALL;
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}
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}
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output += platte.WHITE_ALL + '\n';
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}
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if (!oddRow) {
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output += borderBottom;
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}
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} else {
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var border = repeat(white).times(qrcode.getModuleCount() + 3);
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output += border + '\n';
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qrcode.modules.forEach(function (row) {
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output += white;
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output += row.map(toCell).join('');
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output += white + '\n';
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});
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output += border;
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}
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if (cb) cb(output);
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else console.log(output);
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},
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setErrorLevel: function (error) {
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this.error = QRErrorCorrectLevel[error] || this.error;
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}
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};
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