[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 +1,87 @@
+//ignore_for_file: public_member_api_docs
+
+import 'dart:io';
+import 'dart:isolate';
+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 '../moor_chat_database.dart';
+
+class SharedDB {
+  static Future<VmDatabase> constructDatabase(
+    String dbName, {
+    bool logStatements = false,
+  }) async {
+    if (Platform.isIOS || Platform.isAndroid) {
+      final dir = await getApplicationDocumentsDirectory();
+      final path = join(dir.path, '$dbName.sqlite');
+      final file = File(path);
+      return VmDatabase(file, logStatements: logStatements);
+    }
+    if (Platform.isMacOS || Platform.isLinux) {
+      final file = File('$dbName.sqlite');
+      return VmDatabase(file, logStatements: logStatements);
+    }
+    return VmDatabase.memory(logStatements: logStatements);
+  }
+
+  static void _startBackground(_IsolateStartRequest request) {
+    final executor = LazyDatabase(() async {
+      return VmDatabase(
+        File(request.targetPath),
+        logStatements: request.logStatements,
+      );
+    });
+    final moorIsolate = MoorIsolate.inCurrent(
+      () => DatabaseConnection.fromExecutor(executor),
+    );
+    request.sendMoorIsolate.send(moorIsolate);
+  }
+
+  static Future<MoorIsolate> _createMoorIsolate(
+    String dbName, {
+    bool logStatements = false,
+  }) async {
+    final dir = await getApplicationDocumentsDirectory();
+    final path = join(dir.path, '$dbName.sqlite');
+
+    final receivePort = ReceivePort();
+    await Isolate.spawn(
+      _startBackground,
+      _IsolateStartRequest(
+        receivePort.sendPort,
+        path,
+        logStatements: logStatements,
+      ),
+    );
+
+    return (await receivePort.first as MoorIsolate);
+  }
+
+  static Future<MoorChatDatabase> constructOfflineStorage(
+    String dbName, {
+    bool logStatements = false,
+  }) async {
+    final isolate = await _createMoorIsolate(
+      dbName,
+      logStatements: logStatements,
+    );
+    final connection = await isolate.connect();
+    return MoorChatDatabase.connect(isolate, connection);
+  }
+}
+
+class _IsolateStartRequest {
+  final SendPort sendMoorIsolate;
+  final String targetPath;
+  final bool logStatements;
+
+  const _IsolateStartRequest(
+    this.sendMoorIsolate,
+    this.targetPath, {
+    this.logStatements = false,
+  });
+}
@@ -0,0 +1,3 @@
+export 'unsupported_db.dart'
+    if (dart.library.io) 'native_db.dart' // implementation using dart:io
+    if (dart.library.html) 'web_db.dart';
@@ -0,0 +1,18 @@
+//ignore_for_file: public_member_api_docs
+//ignore_for_file: always_declare_return_types
+
+class SharedDB {
+  static constructDatabase(
+    String dbName, {
+    bool logStatements = false,
+  }) {
+    throw 'Unsupported Platform';
+  }
+
+  static constructOfflineStorage(
+    String dbName, {
+    logStatements = false,
+  }) {
+    throw 'Unsupported Platform';
+  }
+}
@@ -0,0 +1,21 @@
+//ignore_for_file: public_member_api_docs
+//ignore_for_file: always_declare_return_types
+import 'package:moor/moor_web.dart';
+
+import '../moor_chat_database.dart';
+
+class SharedDB {
+  static constructDatabase(
+    String dbName, {
+    bool logStatements = false,
+  }) async {
+    return WebDatabase(dbName, logStatements: logStatements);
+  }
+
+  static Future<MoorChatDatabase> constructOfflineStorage(
+    String dbName, {
+    bool logStatements = false,
+  }) async {
+    return MoorChatDatabase(dbName, logStatements: logStatements);
+  }
+}