♻️ Refactor post draft with drift db

lib/database/draft.dart

@@ -0,0 +1,26 @@
+import 'package:drift/drift.dart';
+
+class ComposeDrafts extends Table {
+  TextColumn get id => text()();
+  TextColumn get title => text().withDefault(const Constant(''))();
+  TextColumn get description => text().withDefault(const Constant(''))();
+  TextColumn get content => text().withDefault(const Constant(''))();
+  TextColumn get attachmentIds => text().withDefault(const Constant('[]'))(); // JSON array as string
+  TextColumn get visibility => text().withDefault(const Constant('public'))();
+  DateTimeColumn get lastModified => dateTime()();
+
+  @override
+  Set<Column> get primaryKey => {id};
+}
+
+class ArticleDrafts extends Table {
+  TextColumn get id => text()();
+  TextColumn get title => text().withDefault(const Constant(''))();
+  TextColumn get description => text().withDefault(const Constant(''))();
+  TextColumn get content => text().withDefault(const Constant(''))();
+  TextColumn get visibility => text().withDefault(const Constant('public'))();
+  DateTimeColumn get lastModified => dateTime()();
+
+  @override
+  Set<Column> get primaryKey => {id};
+}

lib/database/drift_db.dart

@@ -1,16 +1,17 @@
 import 'dart:convert';
 import 'package:drift/drift.dart';
 import 'package:island/database/message.dart';
+import 'package:island/database/draft.dart';
 
 part 'drift_db.g.dart';
 
 // Define the database
-@DriftDatabase(tables: [ChatMessages])
+@DriftDatabase(tables: [ChatMessages, ComposeDrafts, ArticleDrafts])
 class AppDatabase extends _$AppDatabase {
   AppDatabase(super.e);
 
   @override
-  int get schemaVersion => 2;
+  int get schemaVersion => 3;
 
   @override
   MigrationStrategy get migration => MigrationStrategy(
@@ -22,6 +23,11 @@ class AppDatabase extends _$AppDatabase {
         // Add isRead column with default value false
         await m.addColumn(chatMessages, chatMessages.isRead);
       }
+      if (from < 3) {
+        // Add draft tables
+        await m.createTable(composeDrafts);
+        await m.createTable(articleDrafts);
+      }
     },
   );
 
@@ -91,4 +97,52 @@ class AppDatabase extends _$AppDatabase {
       isRead: dbMessage.isRead,
     );
   }
+
+  // Methods for compose drafts
+  Future<List<ComposeDraft>> getAllComposeDrafts() {
+    return (select(composeDrafts)
+          ..orderBy([(d) => OrderingTerm.desc(d.lastModified)]))
+        .get();
+  }
+
+  Future<ComposeDraft?> getComposeDraft(String id) {
+    return (select(composeDrafts)..where((d) => d.id.equals(id)))
+        .getSingleOrNull();
+  }
+
+  Future<int> saveComposeDraft(ComposeDraftsCompanion draft) {
+    return into(composeDrafts).insert(draft, mode: InsertMode.insertOrReplace);
+  }
+
+  Future<int> deleteComposeDraft(String id) {
+    return (delete(composeDrafts)..where((d) => d.id.equals(id))).go();
+  }
+
+  Future<int> clearAllComposeDrafts() {
+    return delete(composeDrafts).go();
+  }
+
+  // Methods for article drafts
+  Future<List<ArticleDraft>> getAllArticleDrafts() {
+    return (select(articleDrafts)
+          ..orderBy([(d) => OrderingTerm.desc(d.lastModified)]))
+        .get();
+  }
+
+  Future<ArticleDraft?> getArticleDraft(String id) {
+    return (select(articleDrafts)..where((d) => d.id.equals(id)))
+        .getSingleOrNull();
+  }
+
+  Future<int> saveArticleDraft(ArticleDraftsCompanion draft) {
+    return into(articleDrafts).insert(draft, mode: InsertMode.insertOrReplace);
+  }
+
+  Future<int> deleteArticleDraft(String id) {
+    return (delete(articleDrafts)..where((d) => d.id.equals(id))).go();
+  }
+
+  Future<int> clearAllArticleDrafts() {
+    return delete(articleDrafts).go();
+  }
 }