add drafts section to settings

lib/main_common.dart

@@ -12,6 +12,7 @@ import 'app_config.dart';
 import 'l10n/timeago/pl.dart';
 import 'pages/log_console/log_console_page_store.dart';
 import 'stores/accounts_store.dart';
+import 'stores/comment_drafts_store.dart';
 import 'stores/config_store.dart';
 import 'util/mobx_provider.dart';
 
@@ -21,6 +22,7 @@ Future<void> mainCommon(AppConfig appConfig) async {
   final logConsoleStore = LogConsolePageStore();
   final sharedPrefs = await SharedPreferences.getInstance();
   await Hive.initFlutter();
+  await CommentDraftStore.open();
 
   _setupLogger(appConfig, logConsoleStore);
   _setupTimeago();

lib/pages/settings/drafts_page.dart

@@ -0,0 +1,140 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_hooks/flutter_hooks.dart';
+import 'package:hive/hive.dart';
+
+import '../../stores/comment_drafts_store.dart';
+
+class DraftsPage extends HookWidget {
+  const DraftsPage._();
+
+  @override
+  Widget build(BuildContext context) {
+    return DefaultTabController(
+      length: 2,
+      child: Scaffold(
+          appBar: AppBar(
+            leading: const BackButton(),
+            title: const Text('Drafts'),
+            bottom: const TabBar(
+              isScrollable: true,
+              tabs: [
+                Tab(child: Text('Comments')),
+                Tab(child: Text('Posts')),
+              ],
+            ),
+          ),
+          body: const TabBarView(children: [
+            _CommentsTab(),
+            _PostsTab(),
+          ])),
+    );
+  }
+
+  static Route route() => MaterialPageRoute(
+        builder: (context) => const DraftsPage._(),
+      );
+}
+
+class _CommentsTab extends HookWidget {
+  const _CommentsTab();
+
+  @override
+  Widget build(BuildContext context) {
+    return ValueListenableBuilder<LazyBox<String>>(
+      valueListenable: CommentDraftStore.allDraftsListenable(),
+      builder: (context, box, widget) {
+        if (box.isEmpty) {
+          return const Center(child: Text('no drafts yet'));
+        }
+
+        Future<void> removeAllDrafts() async {
+          final removeAll = await showDialog<bool>(
+                  context: context,
+                  builder: (context) => AlertDialog(
+                        title: const Text(
+                            'Do you want to remove ALL comment drafts?'),
+                        actions: [
+                          ElevatedButton(
+                            onPressed: () {
+                              Navigator.of(context).pop(true);
+                            },
+                            style: ElevatedButton.styleFrom(
+                              primary: Colors.red,
+                            ),
+                            child: const Text('Yes'),
+                          ),
+                          OutlinedButton(
+                            onPressed: () {
+                              Navigator.of(context).pop(false);
+                            },
+                            child: const Text('No'),
+                          ),
+                        ],
+                      )) ??
+              false;
+          if (removeAll) {
+            await CommentDraftStore.removeAllDrafts();
+          }
+        }
+
+        return ListView.builder(
+          itemCount: box.length + 1,
+          itemBuilder: (context, index) {
+            if (index == box.length) {
+              return Padding(
+                padding: const EdgeInsets.all(16),
+                child: ElevatedButton(
+                  onPressed: removeAllDrafts,
+                  style: ElevatedButton.styleFrom(
+                    primary: Colors.red,
+                  ),
+                  child: const Text('Remove all drafts'),
+                ),
+              );
+            }
+            return _CommentDraftTile(CommentDraftStore.keyAt(index)!);
+          },
+        );
+      },
+    );
+  }
+}
+
+class _CommentDraftTile extends HookWidget {
+  final String databaseKey;
+
+  const _CommentDraftTile(this.databaseKey);
+
+  @override
+  Widget build(BuildContext context) {
+    final body = useState<String?>(null);
+    useEffect(() {
+      CommentDraftStore.loadDraft(databaseKey)
+          .then((value) => body.value = value);
+      return null;
+    });
+
+    return ListTile(
+      key: ValueKey(key),
+      title: body.value == null
+          ? const CircularProgressIndicator.adaptive()
+          : Text(body.value!),
+      trailing: IconButton(
+        icon: const Icon(Icons.delete),
+        onPressed: () {
+          CommentDraftStore.removeDraft(databaseKey);
+        },
+      ),
+      subtitle: Text(databaseKey),
+    );
+  }
+}
+
+class _PostsTab extends StatelessWidget {
+  const _PostsTab();
+
+  @override
+  Widget build(BuildContext context) {
+    return const Center(child: Text('TBD'));
+  }
+}

lib/pages/settings/settings.dart

@@ -16,6 +16,7 @@ import '../manage_account.dart';
 import 'add_account_page.dart';
 import 'add_instance_page.dart';
 import 'blocks/blocks.dart';
+import 'drafts_page.dart';
 
 /// Page with a list of different settings sections
 class SettingsPage extends HookWidget {
@@ -60,6 +61,13 @@ class SettingsPage extends HookWidget {
               goTo(context, (_) => const AppearanceConfigPage());
             },
           ),
+          ListTile(
+            leading: const Icon(Icons.drive_file_rename_outline_outlined),
+            title: const Text('Drafts'),
+            onTap: () {
+              Navigator.of(context).push(DraftsPage.route());
+            },
+          ),
           const AboutTile()
         ],
       ),

lib/stores/comment_drafts_store.dart

@@ -1,24 +1,37 @@
-import 'package:hive/hive.dart';
+import 'package:flutter/foundation.dart';
+import 'package:hive_flutter/adapters.dart';
 
 class CommentDraftStore {
   static const _boxKey = 'comment_drafts';
+  static late LazyBox<String> _box;
 
-  static Future<String?> loadDraft(String apId) async {
-    final box = await Hive.openBox<String>(_boxKey);
-    final text = box.get(apId);
-    await box.close();
-    return text;
+  static Future<void> open() async {
+    _box = await Hive.openLazyBox<String>(_boxKey);
   }
 
-  static Future<void> saveDraft(String apId, String text) async {
-    final box = await Hive.openBox<String>(_boxKey);
-    await box.put(apId, text);
-    await box.close();
+  static Future<void> close() async {
+    await _box.compact();
+    await _box.close();
   }
 
-  static Future<void> removeDraft(String apId) async {
-    final box = await Hive.openBox<String>(_boxKey);
-    await box.delete(apId);
-    await box.close();
+  static Future<void> compact() async {
+    await _box.compact();
+  }
+
+  static String? keyAt(int index) => _box.keyAt(index);
+
+  static ValueListenable<LazyBox<String>> allDraftsListenable() =>
+      _box.listenable();
+
+  static Future<String?> loadDraft(String apId) => _box.get(apId);
+
+  static Future<void> saveDraft(String apId, String text) =>
+      _box.put(apId, text);
+
+  static Future<void> removeDraft(String apId) => _box.delete(apId);
+
+  static Future<void> removeAllDrafts() async {
+    await _box.deleteFromDisk();
+    await open();
   }
 }

lib/widgets/write_comment.dart

@@ -116,10 +116,15 @@ class WriteComment extends HookWidget {
         leading: CloseButton(
           onPressed: () async {
             // save draft before closing
-            if (!_isEdit &&
-                editorController.textEditingController.text.trim().isNotEmpty) {
-              await CommentDraftStore.saveDraft(comment?.apId ?? post.apId,
-                  editorController.textEditingController.text);
+            if (!_isEdit) {
+              if (editorController.textEditingController.text
+                  .trim()
+                  .isNotEmpty) {
+                await CommentDraftStore.saveDraft(comment?.apId ?? post.apId,
+                    editorController.textEditingController.text);
+              } else {
+                await CommentDraftStore.removeDraft(comment?.apId ?? post.apId);
+              }
             }
             Navigator.of(context).pop();
           },