[StreamChatPersistence] Add initial implementation

Signed-off-by: Sahil Kumar <[email protected]>
2021-01-25 19:14:55 +05:30
parent 1021814a75
commit 657b58af8b
47 changed files with 1878 additions and 1 deletions
@@ -0,0 +1,57 @@
+import 'package:moor/moor.dart';
+import 'package:stream_chat/stream_chat.dart';
+import 'package:stream_chat_persistence/src/db/moor_chat_database.dart';
+import 'package:stream_chat_persistence/src/entity/channels.dart';
+import 'package:stream_chat_persistence/src/entity/users.dart';
+import '../mapper/mapper.dart';
+
+part 'channel_dao.g.dart';
+
+///
+@UseDao(tables: [Channels, Users])
+class ChannelDao extends DatabaseAccessor<MoorChatDatabase>
+    with _$ChannelDaoMixin {
+  ///
+  ChannelDao(MoorChatDatabase db) : super(db);
+
+  /// Get channel by cid
+  Future<ChannelModel> getChannelByCid(String cid) async {
+    return (select(channels)..where((c) => c.cid.equals(cid))).join([
+      leftOuterJoin(users, channels.createdById.equalsExp(users.id)),
+    ]).map((rows) {
+      final channel = rows.readTable(channels);
+      final createdBy = rows.readTable(users);
+      return channel.toChannelModel(createdBy: createdBy?.toUser());
+    }).getSingle();
+  }
+
+  /// Delete all channels by matching cid in [cids]
+  ///
+  /// This will automatically delete the following linked records
+  /// 1. Channel Reads
+  /// 2. Channel Members
+  /// 3. Channel Messages -> Messages Reactions
+  Future<void> deleteChannelByCids(List<String> cids) async {
+    return (delete(channels)..where((tbl) => tbl.cid.isIn(cids))).go();
+  }
+
+  /// Get the channel cids saved in the storage
+  Future<List<String>> get cids {
+    return (select(channels)
+          ..orderBy([(c) => OrderingTerm.desc(c.lastMessageAt)])
+          ..limit(250))
+        .map((c) => c.cid)
+        .get();
+  }
+
+  ///
+  Future<void> updateChannels(List<ChannelModel> channelList) {
+    return batch(
+      (it) => it.insertAll(
+        channels,
+        channelList.map((c) => c.toEntity()).toList(),
+        mode: InsertMode.insertOrReplace,
+      ),
+    );
+  }
+}