Allow remote sync frequency to be controller

For now the only 2 options are - automaitic and manual.

I rather name it "Automatic" instead of "After each change" as that way
I can choose to do it more frequently, if desired.

Fixes #8

lib/screens/settings_git_remote.dart

@@ -6,6 +6,8 @@ import 'package:fimber/fimber.dart';
 
 import 'package:git_bindings/git_bindings.dart';
 import 'package:gitjournal/screens/githostsetup_sshkey.dart';
+import 'package:gitjournal/screens/settings_widgets.dart';
+import 'package:gitjournal/settings.dart';
 import 'package:gitjournal/utils.dart';
 
 class GitRemoteSettingsScreen extends StatefulWidget {
@@ -30,6 +32,7 @@ class _GitRemoteSettingsScreenState extends State<GitRemoteSettingsScreen> {
   @override
   Widget build(BuildContext context) {
     var textTheme = Theme.of(context).textTheme;
+    var settings = Settings.instance;
 
     var body = Column(
       children: <Widget>[
@@ -50,6 +53,19 @@ class _GitRemoteSettingsScreenState extends State<GitRemoteSettingsScreen> {
           text: "Regnerate Key",
           onPressed: () => _generateSshKey(context),
         ),
+        ListPreference(
+          title: "Sync Frequency",
+          currentOption: settings.remoteSyncFrequency.toPublicString(),
+          options: RemoteSyncFrequency.options
+              .map((f) => f.toPublicString())
+              .toList(),
+          onChange: (String publicStr) {
+            var val = RemoteSyncFrequency.fromPublicString(publicStr);
+            Settings.instance.remoteSyncFrequency = val;
+            Settings.instance.save();
+            setState(() {});
+          },
+        ),
       ],
       crossAxisAlignment: CrossAxisAlignment.start,
     );

lib/screens/settings_widgets.dart

@@ -43,7 +43,6 @@ class ListPreference extends StatelessWidget {
                     children: children,
                   ),
                 ),
-                contentPadding: const EdgeInsets.all(0.0),
                 actions: <Widget>[
                   FlatButton(
                     child: const Text('CANCEL'),

lib/settings.dart

@@ -19,6 +19,8 @@ class Settings {
 
   String yamlModifiedKey = "modified";
   String defaultNewNoteFolder = "journal";
+
+  RemoteSyncFrequency remoteSyncFrequency = RemoteSyncFrequency.Default;
   int version = 0;
 
   void load(SharedPreferences pref) {
@@ -36,6 +38,10 @@ class Settings {
     yamlModifiedKey = pref.getString("yamlModifiedKey") ?? yamlModifiedKey;
     defaultNewNoteFolder =
         pref.getString("defaultNewNoteFolder") ?? defaultNewNoteFolder;
+
+    remoteSyncFrequency = RemoteSyncFrequency.fromInternalString(
+        pref.getString("remoteSyncFrequency"));
+
     version = pref.getInt("settingsVersion") ?? version;
   }
 
@@ -48,6 +54,8 @@ class Settings {
     pref.setBool("collectCrashReports", collectCrashReports);
     pref.setString("yamlModifiedKey", yamlModifiedKey);
     pref.setString("defaultNewNoteFolder", defaultNewNoteFolder);
+    pref.setString(
+        "remoteSyncFrequency", remoteSyncFrequency.toInternalString());
     pref.setInt("settingsVersion", version);
 
     // Shouldn't we check if something has actually changed?
@@ -132,3 +140,43 @@ class NoteFileNameFormat {
     return "";
   }
 }
+
+class RemoteSyncFrequency {
+  static const Automatic = RemoteSyncFrequency("Automatic");
+  static const Manual = RemoteSyncFrequency("Manual");
+  static const Default = Automatic;
+
+  final String _str;
+  const RemoteSyncFrequency(this._str);
+
+  String toInternalString() {
+    return _str;
+  }
+
+  String toPublicString() {
+    return _str;
+  }
+
+  static const options = <RemoteSyncFrequency>[
+    Automatic,
+    Manual,
+  ];
+
+  static RemoteSyncFrequency fromInternalString(String str) {
+    for (var opt in options) {
+      if (opt.toInternalString() == str) {
+        return opt;
+      }
+    }
+    return Default;
+  }
+
+  static RemoteSyncFrequency fromPublicString(String str) {
+    for (var opt in options) {
+      if (opt.toPublicString() == str) {
+        return opt;
+      }
+    }
+    return Default;
+  }
+}

lib/state_container.dart

@@ -9,6 +9,7 @@ import 'package:gitjournal/appstate.dart';
 import 'package:gitjournal/core/note.dart';
 import 'package:gitjournal/core/notes_folder.dart';
 import 'package:gitjournal/core/git_repo.dart';
+import 'package:gitjournal/settings.dart';
 import 'package:path/path.dart' as p;
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:flutter_crashlytics/flutter_crashlytics.dart';
@@ -116,7 +117,11 @@ class StateContainerState extends State<StateContainer> {
     await _loadNotes();
   }
 
-  Future<void> _syncNotes() {
+  Future<void> _syncNotes() async {
+    var freq = Settings.instance.remoteSyncFrequency;
+    if (freq != RemoteSyncFrequency.Automatic) {
+      return;
+    }
     return syncNotes(doNotThrow: true);
   }