Implement moving the Git Repo to a folder accessible by other apps

This doesn't seem to move it to the SD card, but it does move it to a
public location. This is an Android specific feature.

Not sure if this is allowed with Android 11

Related to #99
Fixes #154

lib/features.dart

@@ -3,7 +3,6 @@ import 'package:easy_localization/easy_localization.dart';
 class Features {
   static bool alwaysPro = false;
   static bool perFolderConfig = false;
-  static bool externalStorage = false;
 
   static final all = <Feature>[
     Feature.basicSearch,

lib/screens/settings_screen.dart

@@ -65,7 +65,8 @@ class SettingsListState extends State<SettingsList> {
   Widget build(BuildContext context) {
     var settings = Provider.of<Settings>(context);
     var appSettings = Provider.of<AppSettings>(context);
-    final appState = Provider.of<StateContainer>(context).appState;
+    final stateContainer = Provider.of<StateContainer>(context);
+    final appState = stateContainer.appState;
 
     var saveGitAuthor = (String gitAuthor) {
       settings.gitAuthor = gitAuthor;
@@ -289,7 +290,7 @@ class SettingsListState extends State<SettingsList> {
           Navigator.of(context).push(route);
         },
       ),
-      if (Platform.isAndroid && Features.externalStorage)
+      if (Platform.isAndroid)
         SwitchListTile(
           title: Text(tr('settings.storage.useLocal')),
           value: settings.storeInternally,
@@ -297,6 +298,10 @@ class SettingsListState extends State<SettingsList> {
             if (newVal == true) {
               settings.storeInternally = true;
               settings.storageLocation = "";
+
+              settings.save();
+              setState(() {});
+              stateContainer.moveRepoToPath();
             } else {
               var req = await Permission.storage.request();
               if (req.isDenied) {
@@ -305,6 +310,7 @@ class SettingsListState extends State<SettingsList> {
 
                 settings.save();
                 setState(() {});
+                stateContainer.moveRepoToPath();
                 return;
               }
               settings.storeInternally = true;
@@ -321,24 +327,24 @@ class SettingsListState extends State<SettingsList> {
               if (path == null) {
                 settings.storeInternally = false;
                 settings.storageLocation = "";
+
                 settings.save();
                 setState(() {});
+                stateContainer.moveRepoToPath();
                 return;
               }
 
               settings.storageLocation = p.join(path, "GitJournal");
               settings.storeInternally = false;
+
               settings.save();
               setState(() {});
+              stateContainer.moveRepoToPath();
               return;
             }
-            settings.save();
-            setState(() {});
-
-            // FIXME: Move the folder to be stored locally!
           },
         ),
-      if (Platform.isAndroid && Features.externalStorage)
+      if (Platform.isAndroid)
         ListTile(
           title: Text(tr('settings.storage.repoLocation')),
           subtitle: Text(settings.storageLocation),

lib/state_container.dart

@@ -35,13 +35,18 @@ class StateContainer with ChangeNotifier {
   GitNoteRepository _gitRepo;
   NotesCache _notesCache;
 
+  String repoPath;
+
   StateContainer({
     @required this.appState,
     @required this.settings,
     @required this.gitBaseDirectory,
     @required this.cacheDirectory,
   }) {
-    var repoPath = p.join(gitBaseDirectory, settings.internalRepoFolderName);
+    var folderName = settings.internalRepoFolderName;
+    repoPath = settings.storeInternally
+        ? p.join(gitBaseDirectory, folderName)
+        : p.join(settings.storageLocation, folderName);
 
     _gitRepo = GitNoteRepository(gitDirPath: repoPath, settings: settings);
     appState.notesFolder = NotesFolderFS(null, _gitRepo.gitDirPath, settings);
@@ -351,4 +356,37 @@ class StateContainer with ChangeNotifier {
   Future _persistConfig() async {
     await settings.save();
   }
+
+  Future<void> moveRepoToPath() async {
+    var folderName = settings.internalRepoFolderName;
+    var newRepoPath = settings.storeInternally
+        ? p.join(gitBaseDirectory, folderName)
+        : p.join(settings.storageLocation, folderName);
+
+    if (newRepoPath != repoPath) {
+      Log.i("Old Path: $repoPath");
+      Log.i("New Path: $newRepoPath");
+
+      await Directory(newRepoPath).create(recursive: true);
+      await _copyDirectory(repoPath, newRepoPath);
+      await Directory(repoPath).delete(recursive: true);
+
+      repoPath = newRepoPath;
+      appState.notesFolder.reset(repoPath);
+      notifyListeners();
+    }
+  }
+}
+
+Future<void> _copyDirectory(String source, String destination) async {
+  await for (var entity in Directory(source).list(recursive: false)) {
+    if (entity is Directory) {
+      var newDirectory = Directory(p.join(
+          Directory(destination).absolute.path, p.basename(entity.path)));
+      await newDirectory.create();
+      await _copyDirectory(entity.absolute.path, newDirectory.path);
+    } else if (entity is File) {
+      await entity.copy(p.join(destination, p.basename(entity.path)));
+    }
+  }
 }