add vendor

vendor/github.com/gin-gonic/gin/examples/realtime-chat/rooms.go

@@ -0,0 +1,33 @@
+package main
+
+import "github.com/dustin/go-broadcast"
+
+var roomChannels = make(map[string]broadcast.Broadcaster)
+
+func openListener(roomid string) chan interface{} {
+	listener := make(chan interface{})
+	room(roomid).Register(listener)
+	return listener
+}
+
+func closeListener(roomid string, listener chan interface{}) {
+	room(roomid).Unregister(listener)
+	close(listener)
+}
+
+func deleteBroadcast(roomid string) {
+	b, ok := roomChannels[roomid]
+	if ok {
+		b.Close()
+		delete(roomChannels, roomid)
+	}
+}
+
+func room(roomid string) broadcast.Broadcaster {
+	b, ok := roomChannels[roomid]
+	if !ok {
+		b = broadcast.NewBroadcaster(10)
+		roomChannels[roomid] = b
+	}
+	return b
+}