add dart client to packages

2021-01-07 12:09:26 -04:00
parent e7eb0a27f6
commit f28cc91301
160 changed files with 26368 additions and 0 deletions
@@ -0,0 +1,64 @@
+import 'dart:io';
+import 'dart:isolate';
+import 'package:flutter/material.dart';
+import 'package:moor/ffi.dart';
+import 'package:moor/isolate.dart';
+import 'package:moor/moor.dart';
+import 'package:path/path.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:stream_chat/src/db/offline_storage.dart';
+
+class SharedDB {
+  static constructDatabase(dbName) async {
+    final dir = await getApplicationDocumentsDirectory();
+    final path = join(dir.path, dbName);
+    final file = File(path);
+    return VmDatabase(file);
+  }
+
+  static Future<MoorIsolate> createMoorIsolate(String userId) async {
+    WidgetsFlutterBinding.ensureInitialized();
+    final dir = await getApplicationDocumentsDirectory();
+    final path = join(dir.path, 'db_$userId.sqlite');
+
+    final receivePort = ReceivePort();
+    await Isolate.spawn(
+      startBackground,
+      _IsolateStartRequest(receivePort.sendPort, path),
+    );
+
+    return (await receivePort.first as MoorIsolate);
+  }
+
+  static void startBackground(_IsolateStartRequest request) {
+    final executor = LazyDatabase(() async {
+      return VmDatabase(File(request.targetPath));
+    });
+    final moorIsolate = MoorIsolate.inCurrent(
+      () => DatabaseConnection.fromExecutor(executor),
+    );
+    request.sendMoorIsolate.send(moorIsolate);
+  }
+
+  static Future<OfflineStorage> constructOfflineStorage({
+    userId,
+    logger,
+  }) async {
+    logger.info('Connecting on background isolate');
+    final isolate = await createMoorIsolate(userId);
+    final connection = await isolate.connect();
+    return OfflineStorage.connect(
+      connection,
+      userId,
+      isolate,
+      logger,
+    );
+  }
+}
+
+class _IsolateStartRequest {
+  final SendPort sendMoorIsolate;
+  final String targetPath;
+
+  _IsolateStartRequest(this.sendMoorIsolate, this.targetPath);
+}