From ecbc1f2260d0f7c1f7cf0d5267590542e95c9d39 Mon Sep 17 00:00:00 2001
From: Ren Juan <juan@acm.org>
Date: Mon, 30 Aug 2021 00:56:54 +0000
Subject: [PATCH] *

---
 Ejectable/BGEO.js | 61 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 Ejectable/BGEO.js

diff --git a/Ejectable/BGEO.js b/Ejectable/BGEO.js
new file mode 100644
index 00000000..1eeb4461
--- /dev/null
+++ b/Ejectable/BGEO.js
@@ -0,0 +1,61 @@
+import React from 'react';
+import { StyleSheet } from 'react-native';
+import { Pressable } from 'react-native';
+import { Text, View } from './components/Themed.tsx';
+import * as TaskManager from 'expo-task-manager';
+import * as Location from 'expo-location';
+import { Trips, setBgOps } from './GT2';
+
+const LOCATION_TASK_NAME = 'background-location-task';
+
+ const requestPermissions = async () => {
+
+  if (!locEnabled) {
+
+  const { status } = await Location.requestBackgroundPermissionsAsync();
+  if (status === 'granted') {
+    await Location.startLocationUpdatesAsync(LOCATION_TASK_NAME, {
+      accuracy: Location.Accuracy.Balanced,
+    });
+    setBgOps(true);
+   }
+   else setBgOps(false);
+
+  }
+
+};
+
+export default function PermissionsButton() {
+  return(
+  <View style={styles.container} lightColor="lime" darkColor="forestgreen">
+    <Pressable style={styles.button} onPress={requestPermissions}>
+      <Text style={styles.text}>{'Enable background operations'}</Text>
+    </Pressable>
+  </View>);
+}
+
+TaskManager.defineTask(LOCATION_TASK_NAME, ({ data, error }) => {
+
+  if (error) {
+    // Error occurred - check `error.message` for more details.
+    console.log(error.message);
+    return;
+  }
+  if (data) {
+    const { locations } = data;
+    Trips.deltaLoc( locations );
+  }
+
+});
+
+const styles = StyleSheet.create({
+  container: {
+    marginVertical: 20,
+    marginBottom: -30,
+    alignItems: 'center',
+  },
+  button: {
+    fontSize: 10,
+    backgroundColor: 'lime',
+  },
+});