Resolve #33 Null safety

Author: jumperchen

CHANGELOG.md

@@ -1,3 +1,10 @@
+## 1.0.0
+
+**New Feature:**
+
+* [#33](https://github.com/rikulo/socket.io-dart/issues/33) Null safety
+
+
 ## 0.9.4
 
 **Bug Fix:**

lib/src/adapter/adapter.dart

@@ -15,14 +15,14 @@ import 'package:socket_io/src/util/event_emitter.dart';
 
 abstract class Adapter {
   Map nsps = {};
-  Map<String, _Room> rooms;
-  Map<String, Map> sids;
+  Map<String, _Room> rooms = {};
+  Map<String, Map> sids = {};
 
   void add(String id, String room, [dynamic Function([dynamic]) fn]);
   void del(String id, String room, [dynamic Function([dynamic]) fn]);
   void delAll(String id, [dynamic Function([dynamic]) fn]);
   void broadcast(Map packet, [Map opts]);
-  void clients(List rooms, [dynamic Function([dynamic]) fn]);
+  void clients([List<String> rooms, dynamic Function([dynamic]) fn]);
   void clientRooms(String id, [dynamic Function(dynamic, [dynamic]) fn]);
 
   static Adapter newInstance(String key, Namespace nsp) {
@@ -37,15 +37,15 @@ class _MemoryStoreAdapter extends EventEmitter implements Adapter {
   @override
   Map nsps = {};
   @override
-  Map<String, _Room> rooms;
+  Map<String, _Room> rooms = {};
+
   @override
-  Map<String, Map> sids;
-  Encoder encoder;
-  Namespace nsp;
-  _MemoryStoreAdapter(nsp) {
+  Map<String, Map> sids = {};
+  late Encoder encoder;
+  late Namespace nsp;
+
+  _MemoryStoreAdapter(Namespace nsp) {
     this.nsp = nsp;
-    rooms = {};
-    sids = {};
     encoder = nsp.server.encoder;
   }
 
@@ -57,11 +57,11 @@ class _MemoryStoreAdapter extends EventEmitter implements Adapter {
   /// @api public
 
   @override
-  void add(String id, String room, [dynamic Function([dynamic]) fn]) {
+  void add(String id, String room, [dynamic Function([dynamic])? fn]) {
     sids[id] = sids[id] ?? {};
-    sids[id][room] = true;
+    sids[id]![room] = true;
     rooms[room] = rooms[room] ?? _Room();
-    rooms[room].add(id);
+    rooms[room]!.add(id);
     if (fn != null) scheduleMicrotask(() => fn(null));
   }
 
@@ -72,12 +72,12 @@ class _MemoryStoreAdapter extends EventEmitter implements Adapter {
   /// @param {Function} callback
   /// @api public
   @override
-  void del(String id, String room, [dynamic Function([dynamic]) fn]) {
+  void del(String id, String room, [dynamic Function([dynamic])? fn]) {
     sids[id] = sids[id] ?? {};
-    sids[id].remove(room);
+    sids[id]!.remove(room);
     if (rooms.containsKey(room)) {
-      rooms[room].del(id);
-      if (rooms[room].length == 0) rooms.remove(room);
+      rooms[room]!.del(id);
+      if (rooms[room]!.length == 0) rooms.remove(room);
     }
 
     if (fn != null) scheduleMicrotask(() => fn(null));
@@ -89,13 +89,13 @@ class _MemoryStoreAdapter extends EventEmitter implements Adapter {
   /// @param {Function} callback
   /// @api public
   @override
-  void delAll(String id, [dynamic Function([dynamic]) fn]) {
+  void delAll(String id, [dynamic Function([dynamic])? fn]) {
     var rooms = sids[id];
     if (rooms != null) {
       for (var room in rooms.keys) {
         if (this.rooms.containsKey(room)) {
-          this.rooms[room].del(id);
-          if (this.rooms[room].length == 0) this.rooms.remove(room);
+          this.rooms[room]!.del(id);
+          if (this.rooms[room]!.length == 0) this.rooms.remove(room);
         }
       }
     }
@@ -114,7 +114,7 @@ class _MemoryStoreAdapter extends EventEmitter implements Adapter {
   /// @param {Object} packet object
   /// @api public
   @override
-  void broadcast(Map packet, [Map opts]) {
+  void broadcast(Map packet, [Map? opts]) {
     opts = opts ?? {};
     List rooms = opts['rooms'] ?? [];
     List except = opts['except'] ?? [];
@@ -161,9 +161,8 @@ class _MemoryStoreAdapter extends EventEmitter implements Adapter {
   /// @param {Function} callback
   /// @api public
   @override
-  void clients(List rooms, [dynamic Function([dynamic]) fn]) {
-    rooms = rooms ?? [];
-
+  void clients(
+      [List<String> rooms = const [], dynamic Function([dynamic])? fn]) {
     var ids = {};
     var sids = [];
     var socket;
@@ -200,7 +199,7 @@ class _MemoryStoreAdapter extends EventEmitter implements Adapter {
   /// @param {Function} callback
   /// @api public
   @override
-  void clientRooms(String id, [dynamic Function(dynamic, [dynamic]) fn]) {
+  void clientRooms(String id, [dynamic Function(dynamic, [dynamic])? fn]) {
     var rooms = sids[id];
     if (fn != null) scheduleMicrotask(() => fn(null, rooms?.keys));
   }
@@ -210,12 +209,8 @@ class _MemoryStoreAdapter extends EventEmitter implements Adapter {
 ///
 /// @api private
 class _Room {
-  Map<String, bool> sockets;
-  int length;
-  _Room() {
-    sockets = {};
-    length = 0;
-  }
+  Map<String, bool> sockets = {};
+  int length = 0;
 
   /// Adds a socket to a room.
   ///

lib/src/client.dart

@@ -19,8 +19,8 @@ class Client {
   Socket conn;
   dynamic id;
   dynamic request;
-  Encoder encoder;
-  Decoder decoder;
+  Encoder encoder = Encoder();
+  Decoder decoder = Decoder();
   List sockets = [];
   Map nsps = {};
   List<String> connectBuffer = [];
@@ -31,11 +31,9 @@ class Client {
   /// @param {Server} server instance
   /// @param {Socket} connection
   /// @api private
-  Client(this.server, this.conn) {
-    encoder = Encoder();
-    decoder = Decoder();
-    id = conn.id;
-    request = conn.connect.request;
+  Client(this.server, this.conn)
+      : id = conn.id,
+        request = conn.connect.request {
     setup();
   }
 
@@ -125,12 +123,13 @@ class Client {
   /// @param {Object} packet object
   /// @param {Object} options
   /// @api private
-  void packet(packet, [Map opts]) {
+  void packet(packet, [Map? opts]) {
     var self = this;
-    opts = opts ?? {};
+    opts ??= {};
     // this writes to the actual connection
     void writeToEngine(encodedPackets) {
-      if (opts['volatile'] != null && !self.conn.transport.writable) return;
+      if (opts!['volatile'] != null && self.conn.transport.writable != true)
+        return;
       for (var i = 0; i < encodedPackets.length; i++) {
         self.conn.write(encodedPackets[i], {'compress': opts['compress']});
       }

lib/src/engine/connect.dart

@@ -13,9 +13,9 @@ import 'dart:async';
 import 'dart:io';
 
 class SocketConnect extends HttpConnectWrapper {
-  WebSocket _socket;
-  Completer _done;
-  bool _completed;
+  WebSocket? _socket;
+  Completer? _done;
+  bool? _completed;
   SocketConnect(HttpConnect origin) : super(origin);
 
   SocketConnect.fromWebSocket(HttpConnect origin, WebSocket socket)
@@ -25,26 +25,26 @@ class SocketConnect extends HttpConnectWrapper {
 
   bool isUpgradeRequest() => _socket != null;
 
-  WebSocket get websocket => _socket;
+  WebSocket? get websocket => _socket;
 
   Future get done {
     if (_completed == true) {
       return Future.value('done');
     }
     if (_socket != null) {
-      return _socket.done;
+      return _socket!.done;
     } else {
       _done = Completer();
-      return _done.future;
+      return _done!.future;
     }
   }
 
   /// Closes the current connection.
   void close() {
     if (_done != null) {
-      _done.complete('done');
+      _done!.complete('done');
     } else if (_socket != null) {
-      _socket.close();
+      _socket!.close();
     } else {
       _completed = true;
     }

lib/src/engine/engine.dart

@@ -12,7 +12,7 @@ import 'package:socket_io/src/engine/server.dart';
 import 'package:socket_io/src/util/event_emitter.dart';
 
 class Engine extends EventEmitter {
-  static Engine attach(server, [Map options]) {
+  static Engine attach(server, [Map? options]) {
     var engine = Server(options);
     engine.attachTo(server, options);
     return engine;