refactoring

server/src/engine/engine.go

@@ -10,22 +10,26 @@ import (
 
 func NewEngine(id string) *Engine {
 	engine := Engine{
-		id:  id,
-		obs: observer.NewProperty(syncdata.SyncData{}),
+		id:         id,
+		versionRef: 0,
+		obs:        observer.NewProperty(syncdata.SyncData{}),
 	}
 	return &engine
 }
 
-func (engine *Engine) Run() {
+func (eng *Engine) Run() {
 	r := rand.New(rand.NewSource(time.Now().UnixNano()))
 	for {
-		value := engine.obs.Value().(syncdata.SyncData)
-		fmt.Printf("game %s: %d\n", engine.id, value.VersionRef)
 		wait := int(1 + r.Float32()*5)
 		for i := 0; i < wait; i++ {
 			time.Sleep(1 * time.Second)
 		}
-		value.VersionRef++
-		engine.obs.Update(value)
+
+		eng.versionRef++
+		fmt.Printf("game %s: %d\n", eng.id, eng.versionRef)
+		data := syncdata.SyncData{
+			VersionRef: eng.versionRef,
+		}
+		eng.obs.Update(data)
 	}
 }

server/src/engine/struct.go

@@ -8,6 +8,7 @@ import (
 type HandleFunc func(http.ResponseWriter, *http.Request)
 
 type Engine struct {
-	id  string
-	obs observer.Property
+	id         string
+	versionRef int
+	obs        observer.Property
 }