fix: Persistent settings

lib/components/settings_switch_list_tile.dart

@@ -0,0 +1,41 @@
+import 'package:flutter/material.dart';
+
+import 'matrix.dart';
+
+class SettingsSwitchListTile extends StatefulWidget {
+  final bool defaultValue;
+  final String storeKey;
+  final String title;
+  final Function(bool) onChanged;
+
+  const SettingsSwitchListTile({
+    Key key,
+    this.defaultValue = false,
+    @required this.storeKey,
+    @required this.title,
+    this.onChanged,
+  }) : super(key: key);
+
+  @override
+  _SettingsSwitchListTileState createState() => _SettingsSwitchListTileState();
+}
+
+class _SettingsSwitchListTileState extends State<SettingsSwitchListTile> {
+  @override
+  Widget build(BuildContext context) {
+    return FutureBuilder<bool>(
+      future: Matrix.of(context).store.getItemBool(widget.storeKey),
+      builder: (context, snapshot) => SwitchListTile(
+        value: snapshot.data ?? widget.defaultValue,
+        title: Text(widget.title),
+        onChanged: (bool newValue) async {
+          widget.onChanged?.call(newValue);
+          await Matrix.of(context)
+              .store
+              .setItem(widget.storeKey, newValue.toString());
+          setState(() => null);
+        },
+      ),
+    );
+  }
+}

lib/views/settings.dart

@@ -2,6 +2,7 @@ import 'package:adaptive_dialog/adaptive_dialog.dart';
 import 'package:adaptive_page_layout/adaptive_page_layout.dart';
 import 'package:fluffychat/components/dialogs/bootstrap_dialog.dart';
 import 'package:fluffychat/components/sentry_switch_list_tile.dart';
+import 'package:fluffychat/components/settings_switch_list_tile.dart';
 import 'package:flushbar/flushbar_helper.dart';
 import 'package:famedlysdk/famedlysdk.dart';
 import 'package:file_picker_cross/file_picker_cross.dart';
@@ -382,36 +383,23 @@ class _SettingsState extends State<Settings> {
                   AdaptivePageLayout.of(context).pushNamed('/settings/style'),
               trailing: Icon(Icons.style_outlined),
             ),
-            SwitchListTile(
-              title: Text(L10n.of(context).renderRichContent),
-              value: AppConfig.renderHtml,
-              onChanged: (bool newValue) async {
-                AppConfig.renderHtml = newValue;
-                await Matrix.of(context)
-                    .store
-                    .setItem(SettingKeys.renderHtml, newValue.toString());
-                setState(() => null);
-              },
+            SettingsSwitchListTile(
+              title: L10n.of(context).renderRichContent,
+              onChanged: (b) => AppConfig.renderHtml = b,
+              storeKey: SettingKeys.renderHtml,
+              defaultValue: AppConfig.renderHtml,
             ),
-            SwitchListTile(
-              title: Text(L10n.of(context).hideRedactedEvents),
-              value: AppConfig.hideRedactedEvents,
-              onChanged: (bool newValue) async {
-                AppConfig.hideRedactedEvents = newValue;
-                await Matrix.of(context).store.setItem(
-                    SettingKeys.hideRedactedEvents, newValue.toString());
-                setState(() => null);
-              },
+            SettingsSwitchListTile(
+              title: L10n.of(context).hideRedactedEvents,
+              onChanged: (b) => AppConfig.hideRedactedEvents = b,
+              storeKey: SettingKeys.hideRedactedEvents,
+              defaultValue: AppConfig.hideRedactedEvents,
             ),
-            SwitchListTile(
-              title: Text(L10n.of(context).hideUnknownEvents),
-              value: AppConfig.hideUnknownEvents,
-              onChanged: (bool newValue) async {
-                AppConfig.hideUnknownEvents = newValue;
-                await Matrix.of(context).store.setItem(
-                    SettingKeys.hideUnknownEvents, newValue.toString());
-                setState(() => null);
-              },
+            SettingsSwitchListTile(
+              title: L10n.of(context).hideUnknownEvents,
+              onChanged: (b) => AppConfig.hideUnknownEvents = b,
+              storeKey: SettingKeys.hideUnknownEvents,
+              defaultValue: AppConfig.hideUnknownEvents,
             ),
             ListTile(
               title: Text(L10n.of(context).emoteSettings),