Only send events to clients who need it

- User events (star, rating, plays) only sent to same user
- Don't send to the client (browser window) that originated the event

model/request/request.go

@@ -9,12 +9,13 @@ import (
 type contextKey string
 
 const (
-	User        = contextKey("user")
-	Username    = contextKey("username")
-	Client      = contextKey("client")
-	Version     = contextKey("version")
-	Player      = contextKey("player")
-	Transcoding = contextKey("transcoding")
+	User           = contextKey("user")
+	Username       = contextKey("username")
+	Client         = contextKey("client")
+	Version        = contextKey("version")
+	Player         = contextKey("player")
+	Transcoding    = contextKey("transcoding")
+	ClientUniqueId = contextKey("clientUniqueId")
 )
 
 func WithUser(ctx context.Context, u model.User) context.Context {
@@ -41,6 +42,10 @@ func WithTranscoding(ctx context.Context, t model.Transcoding) context.Context {
 	return context.WithValue(ctx, Transcoding, t)
 }
 
+func WithClientUniqueId(ctx context.Context, clientUniqueId string) context.Context {
+	return context.WithValue(ctx, ClientUniqueId, clientUniqueId)
+}
+
 func UserFrom(ctx context.Context) (model.User, bool) {
 	v, ok := ctx.Value(User).(model.User)
 	return v, ok
@@ -70,3 +75,8 @@ func TranscodingFrom(ctx context.Context) (model.Transcoding, bool) {
 	v, ok := ctx.Value(Transcoding).(model.Transcoding)
 	return v, ok
 }
+
+func ClientUniqueIdFrom(ctx context.Context) (string, bool) {
+	v, ok := ctx.Value(ClientUniqueId).(string)
+	return v, ok
+}