From f2afeac3da3c4dd2318a26eb3258b8cf3f8b83a2 Mon Sep 17 00:00:00 2001
From: l2vator <l2vator@action2quare.com>
Date: Wed, 3 Jul 2024 14:44:53 +0900
Subject: [PATCH] =?UTF-8?q?[=EC=98=A4=EC=8A=B9=EC=84=9D]=20Account=20Link?=
 =?UTF-8?q?=20-=20func=20link()=EC=95=88=EC=97=90=EC=84=9C=20CollectionLin?=
 =?UTF-8?q?k=EC=97=90=20=EC=9D=B4=EB=AF=B8=20link=EB=90=9C=20=EA=B3=84?=
 =?UTF-8?q?=EC=A0=95=EC=9D=B4=20=EC=9E=88=EB=8A=94=EA=B2=BD=EC=9A=B0,=20js?=
 =?UTF-8?q?on=EC=9C=BC=EB=A1=9C=20'{"alreadylink":true}'=20=EB=B0=98?=
 =?UTF-8?q?=ED=99=98=ED=95=98=EB=8F=84=EB=A1=9D=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 core/service.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/core/service.go b/core/service.go
index c5f8210..6ec9943 100644
--- a/core/service.go
+++ b/core/service.go
@@ -360,6 +360,18 @@ func (sh *serviceDescription) link(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	found, err := sh.mongoClient.FindOne(CollectionLink, bson.M{"platform": newType, "uid": newId}, options.FindOne())
+	if err != nil {
+		logger.Error("link failed. FindOne err:", err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	if found != nil {
+		logger.Println("link failed. already have service account: ", r.URL.Query())
+		w.Write([]byte(`{"alreadylink":true}`))
+		return
+	}
+
 	createtime := primitive.NewDateTimeFromTime(time.Now().UTC())
 	link, err := sh.mongoClient.FindOneAndUpdate(CollectionLink, bson.M{
 		"platform": newType,