[common] udpate proto

src/common/haxe/ru/m/signal/Signal.hx

@@ -0,0 +1,27 @@
+package ru.m.signal;
+
+
+typedef Receiver<T> = T -> Void;
+
+class Signal<T> {
+
+    private var receivers:Array<Receiver<T>>;
+
+    public function new() {
+        receivers = [];
+    }
+
+    public function connect(receiver:Receiver<T>):Void {
+        receivers.push(receiver);
+    }
+
+    public function disconnect(receiver:Receiver<T>):Void {
+        receivers.remove(receiver);
+    }
+
+    public function emit(value:T):Void {
+        for (receiver in receivers) {
+            receiver(value);
+        }
+    }
+}