♻️ Refactor to replace Hive with Sqlite

lib/database/chat.dart

@@ -1,26 +1,74 @@
+import 'dart:convert';
+
 import 'package:drift/drift.dart';
 import 'package:surface/types/chat.dart';
 
+class SnChannelConverter extends TypeConverter<SnChannel, String>
+    with JsonTypeConverter2<SnChannel, String, Map<String, Object?>> {
+  const SnChannelConverter();
+
+  @override
+  SnChannel fromSql(String fromDb) {
+    return fromJson(jsonDecode(fromDb) as Map<String, dynamic>);
+  }
+
+  @override
+  String toSql(SnChannel value) {
+    return jsonEncode(toJson(value));
+  }
+
+  @override
+  SnChannel fromJson(Map<String, Object?> json) {
+    return SnChannel.fromJson(json);
+  }
+
+  @override
+  Map<String, Object?> toJson(SnChannel value) {
+    return value.toJson();
+  }
+}
+
 class SnLocalChatChannel extends Table {
   IntColumn get id => integer().autoIncrement()();
 
-  BlobColumn get content => blob().map(TypeConverter.jsonb(
-    fromJson: (json) => SnChannel.fromJson(json as Map<String, Object?>),
-    toJson: (pref) => pref.toJson(),
-  ))();
+  TextColumn get alias => text()();
+
+  TextColumn get content => text().map(const SnChannelConverter())();
 
   DateTimeColumn get createdAt => dateTime().withDefault(currentDateAndTime)();
 }
 
+class SnMessageConverter extends TypeConverter<SnChatMessage, String>
+    with JsonTypeConverter2<SnChatMessage, String, Map<String, Object?>> {
+  const SnMessageConverter();
+
+  @override
+  SnChatMessage fromSql(String fromDb) {
+    return fromJson(jsonDecode(fromDb) as Map<String, dynamic>);
+  }
+
+  @override
+  String toSql(SnChatMessage value) {
+    return jsonEncode(toJson(value));
+  }
+
+  @override
+  SnChatMessage fromJson(Map<String, Object?> json) {
+    return SnChatMessage.fromJson(json);
+  }
+
+  @override
+  Map<String, Object?> toJson(SnChatMessage value) {
+    return value.toJson();
+  }
+}
+
 class SnLocalChatMessage extends Table {
   IntColumn get id => integer().autoIncrement()();
 
   IntColumn get channelId => integer()();
 
-  BlobColumn get content => blob().map( TypeConverter.jsonb(
-    fromJson: (json) => SnChatMessage.fromJson(json as Map<String, Object?>),
-    toJson: (pref) => pref.toJson(),
-  ))();
+  TextColumn get content => text().map(const SnMessageConverter())();
 
   DateTimeColumn get createdAt => dateTime().withDefault(currentDateAndTime)();
-}
+}