From fd3f3401c228967d3e5fd72aa0ba8c7d84517a91 Mon Sep 17 00:00:00 2001
From: Bill Thornton <billt2006@gmail.com>
Date: Thu, 18 Nov 2021 14:24:50 -0500
Subject: [PATCH] Add file downloads

---
 assets/js/NativeShell.staticjs   |   6 +-
 components/DownloadListItem.js   |  41 ++++++++++++
 components/NativeShellWebView.js |  10 +++
 constants/Screens.js             |   1 +
 langs/en.json                    |   1 +
 navigation/TabNavigator.js       |  12 ++++
 package-lock.json                |   8 +++
 package.json                     |   3 +-
 screens/DownloadScreen.js        | 104 +++++++++++++++++++++++++++++++
 stores/DownloadStore.js          |  33 ++++++++++
 stores/RootStore.js              |   3 +
 11 files changed, 218 insertions(+), 4 deletions(-)
 create mode 100644 components/DownloadListItem.js
 create mode 100644 screens/DownloadScreen.js
 create mode 100644 stores/DownloadStore.js

diff --git a/assets/js/NativeShell.staticjs b/assets/js/NativeShell.staticjs
index e333a7c..b1f8235 100644
--- a/assets/js/NativeShell.staticjs
+++ b/assets/js/NativeShell.staticjs
@@ -6,7 +6,7 @@
 
 // List of supported features as reported in Safari
 const ExpoSupportedFeatures = [
-	// 'filedownload',
+	'filedownload',
 	'exit',
 	'plugins',
 	'externallinks',
@@ -102,8 +102,8 @@ window.NativeShell = {
 		}
 	},
 
-	downloadFile: function(url) {
-		postExpoEvent('downloadFile', { url: url });
+	downloadFile: function(item) {
+		postExpoEvent('downloadFile', { item: item });
 	},
 
 	enableFullscreen: function() {
diff --git a/components/DownloadListItem.js b/components/DownloadListItem.js
new file mode 100644
index 0000000..a3ed88a
--- /dev/null
+++ b/components/DownloadListItem.js
@@ -0,0 +1,41 @@
+/**
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+import PropTypes from 'prop-types';
+import React from 'react';
+import { ActivityIndicator } from 'react-native';
+import { Button, ListItem } from 'react-native-elements';
+
+import { getIconName } from '../utils/Icons';
+
+const DownloadListItem = ({ item, index, onShare }) => (
+	<ListItem
+		topDivider={index === 0}
+		bottomDivider
+	>
+		<ListItem.Content>
+			<ListItem.Title>{item.title}</ListItem.Title>
+		</ListItem.Content>
+		{item.isComplete ?
+			<Button
+				type='clear'
+				icon={{
+					name: getIconName('share-outline'),
+					type: 'ionicon'
+				}}
+				onPress={() => onShare(item)}
+			/> : <ActivityIndicator />
+		}
+	</ListItem>
+);
+
+DownloadListItem.propTypes = {
+	item: PropTypes.object.isRequired,
+	index: PropTypes.number.isRequired,
+	onShare: PropTypes.func.isRequired
+};
+
+export default DownloadListItem;
diff --git a/components/NativeShellWebView.js b/components/NativeShellWebView.js
index 99617b3..ff9f0e4 100644
--- a/components/NativeShellWebView.js
+++ b/components/NativeShellWebView.js
@@ -3,6 +3,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
+
 import compareVersions from 'compare-versions';
 import Constants from 'expo-constants';
 import { activateKeepAwake, deactivateKeepAwake } from 'expo-keep-awake';
@@ -87,6 +88,15 @@ true;
 					case 'disableFullscreen':
 						rootStore.isFullscreen = false;
 						break;
+					case 'downloadFile':
+						console.log('Download item', data);
+						const url = new URL(data.item.url); // eslint-disable-line no-case-declarations
+						// console.log('url', url.searchParams.get('api_key'));
+						rootStore.downloadStore.add({
+							...data.item,
+							apiKey: url.searchParams.get('api_key')
+						});
+						break;
 					case 'openUrl':
 						console.log('Opening browser for external url', data.url);
 						openBrowser(data.url);
diff --git a/constants/Screens.js b/constants/Screens.js
index e88cddd..0a3fc58 100644
--- a/constants/Screens.js
+++ b/constants/Screens.js
@@ -9,6 +9,7 @@ export default {
 	AddServerScreen: 'AddServer',
 	HomeScreen: 'HomeScreen',
 	HomeTab: 'Home',
+	DownloadsTab: 'Downloads',
 	ServerHelpScreen: 'ServerHelpScreen',
 	SettingsTab: 'Settings',
 	SettingsScreen: 'SettingsScreen',
diff --git a/langs/en.json b/langs/en.json
index b906573..87c1b0a 100644
--- a/langs/en.json
+++ b/langs/en.json
@@ -8,6 +8,7 @@
   "headings": {
     "addServer": "Add Server",
     "appearance": "Appearance",
+    "downloads": "Downloads",
     "home": "Home",
     "links": "Links",
     "playback": "Playback",
diff --git a/navigation/TabNavigator.js b/navigation/TabNavigator.js
index ea65388..963837b 100644
--- a/navigation/TabNavigator.js
+++ b/navigation/TabNavigator.js
@@ -13,6 +13,7 @@ import { useSafeAreaInsets } from 'react-native-safe-area-context';
 
 import Screens from '../constants/Screens';
 import { useStores } from '../hooks/useStores';
+import DownloadScreen from '../screens/DownloadScreen';
 import { getIconName } from '../utils/Icons';
 
 import HomeNavigator from './HomeNavigator';
@@ -22,8 +23,12 @@ function TabIcon(routeName, color, size) {
 	let iconName = null;
 	if (routeName === Screens.HomeTab) {
 		iconName = getIconName('tv-outline');
+	} else if (routeName === Screens.DownloadsTab) {
+		iconName = 'download-outline';
 	} else if (routeName === Screens.SettingsTab) {
 		iconName = getIconName('cog-outline');
+	} else {
+		iconName = 'help-circle-outline';
 	}
 
 	return (
@@ -66,6 +71,13 @@ const TabNavigator = observer(() => {
 					title: t('headings.home')
 				}}
 			/>
+			<Tab.Screen
+				name={Screens.DownloadsTab}
+				component={DownloadScreen}
+				options={{
+					title: t('headings.downloads')
+				}}
+			/>
 			<Tab.Screen
 				name={Screens.SettingsTab}
 				component={SettingsNavigator}
diff --git a/package-lock.json b/package-lock.json
index 3513c8b..767c93c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9348,6 +9348,14 @@
         }
       }
     },
+    "expo-sharing": {
+      "version": "10.0.3",
+      "resolved": "https://registry.npmjs.org/expo-sharing/-/expo-sharing-10.0.3.tgz",
+      "integrity": "sha512-ZiXmirRVznbrrc0ztfNj+IV9bzUaeMqubEJSrnl/lIBXPPQNSSvDehe7hmPf7c7tHH6q4ebR/hlExkNgjz93wA==",
+      "requires": {
+        "expo-modules-core": "~0.4.4"
+      }
+    },
     "expo-splash-screen": {
       "version": "0.13.5",
       "resolved": "https://registry.npmjs.org/expo-splash-screen/-/expo-splash-screen-0.13.5.tgz",
diff --git a/package.json b/package.json
index 28f7b81..2435102 100644
--- a/package.json
+++ b/package.json
@@ -74,7 +74,8 @@
     "react-native-screens": "~3.8.0",
     "react-native-url-polyfill": "^1.3.0",
     "react-native-webview": "11.13.0",
-    "uuid": "^8.3.2"
+    "uuid": "^8.3.2",
+    "expo-sharing": "~10.0.3"
   },
   "devDependencies": {
     "@babel/core": "^7.12.9",
diff --git a/screens/DownloadScreen.js b/screens/DownloadScreen.js
new file mode 100644
index 0000000..92651da
--- /dev/null
+++ b/screens/DownloadScreen.js
@@ -0,0 +1,104 @@
+/**
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+import * as FileSystem from 'expo-file-system';
+import * as Sharing from 'expo-sharing';
+import { observer } from 'mobx-react-lite';
+import React, { useContext, useEffect, useState } from 'react';
+import { FlatList, StyleSheet } from 'react-native';
+import { ThemeContext } from 'react-native-elements';
+import { SafeAreaView } from 'react-native-safe-area-context';
+
+import DownloadListItem from '../components/DownloadListItem';
+import { useStores } from '../hooks/useStores';
+
+const getDownloadDir = download => `${FileSystem.documentDirectory}${download.serverId}/${download.itemId}/`;
+const getDownloadUri = download => getDownloadDir(download) + encodeURI(download.filename);
+
+async function ensureDirExists(dir) {
+	console.log('ensure directory', dir);
+	const info = await FileSystem.getInfoAsync(dir);
+	console.log('directory info', info);
+	if (!info.exists) {
+		await FileSystem.makeDirectoryAsync(dir, { intermediates: true });
+	}
+}
+
+const DownloadScreen = observer(() => {
+	const { rootStore } = useStores();
+	const { theme } = useContext(ThemeContext);
+	const [ resumables, setResumables ] = useState([]);
+
+	async function downloadFile(download) {
+		console.log('download file', download);
+		await ensureDirExists(getDownloadDir(download));
+
+		const url = download.url;
+		const uri = getDownloadUri(download);
+		console.log('url', url, uri);
+
+		const resumable = FileSystem.createDownloadResumable(
+			url,
+			uri,
+			{},
+			console.log
+		);
+		setResumables([ ...resumables, resumable ]);
+		try {
+			download.isDownloading = true;
+			await resumable.downloadAsync();
+			download.isDownloading = false;
+			download.isComplete = true;
+		} catch (e) {
+			console.error('Download failed', e);
+			download.isDownloading = false;
+		}
+	}
+
+	useEffect(() => {
+		rootStore.downloadStore.downloads
+			.filter(download => !download.isComplete && !download.isDownloading)
+			.forEach(downloadFile);
+	}, [ rootStore.downloadStore.downloads ]);
+
+	return (
+		<SafeAreaView
+			style={{
+				...styles.container,
+				backgroundColor: theme.colors.background
+			}}
+			edges={[ 'right', 'left' ]}
+		>
+			<FlatList
+				data={rootStore.downloadStore.downloads}
+				renderItem={({ item, index }) => (
+					<DownloadListItem
+						item={item}
+						index={index}
+						onShare={async () => {
+							Sharing.shareAsync(
+								await FileSystem.getContentUriAsync(getDownloadUri(item))
+							);
+						}}
+					/>
+				)}
+				keyExtractor={(item, index) => `download-${index}-${item.serverId}-${item.itemId}`}
+				contentContainerStyle={styles.listContainer}
+			/>
+		</SafeAreaView>
+	);
+});
+
+const styles = StyleSheet.create({
+	container: {
+		flex: 1
+	},
+	listContainer: {
+		marginTop: 1
+	}
+});
+
+export default DownloadScreen;
diff --git a/stores/DownloadStore.js b/stores/DownloadStore.js
new file mode 100644
index 0000000..f163268
--- /dev/null
+++ b/stores/DownloadStore.js
@@ -0,0 +1,33 @@
+/**
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+import { action, decorate, observable } from 'mobx';
+
+export default class DownloadStore {
+	downloads = []
+
+	add(download) {
+		// Do not allow duplicate downloads
+		if (!this.downloads.find(search => search.serverId === download.serverId && search.itemId === download.itemId)) {
+			this.downloads.push(download);
+		}
+	}
+
+	remove(index) {
+		this.downloads.splice(index, 1);
+	}
+
+	reset() {
+		this.downloads = [];
+	}
+}
+
+decorate(DownloadStore, {
+	downloads: [ observable ],
+	add: action,
+	remove: action,
+	reset: action
+});
diff --git a/stores/RootStore.js b/stores/RootStore.js
index 9c9b1ce..ad7118b 100644
--- a/stores/RootStore.js
+++ b/stores/RootStore.js
@@ -11,6 +11,7 @@ import { action, decorate, observable } from 'mobx';
 import { ignore } from 'mobx-sync-lite';
 import { v4 as uuidv4 } from 'uuid';
 
+import DownloadStore from './DownloadStore';
 import MediaStore from './MediaStore';
 import ServerStore from './ServerStore';
 import SettingStore from './SettingStore';
@@ -41,6 +42,7 @@ export default class RootStore {
 	 */
 	didPlayerCloseManually = true
 
+	downloadStore = new DownloadStore()
 	mediaStore = new MediaStore()
 	serverStore = new ServerStore()
 	settingStore = new SettingStore()
@@ -52,6 +54,7 @@ export default class RootStore {
 		this.isReloadRequired = false;
 		this.didPlayerCloseManually = true;
 
+		this.downloadStore.reset();
 		this.mediaStore.reset();
 		this.serverStore.reset();
 		this.settingStore.reset();