improve protected branch to add whitelist support (#2451)

* improve protected branch to add whitelist support

* fix lint

* fix style check

* fix tests

* fix description on UI and import

* fix test

* bug fixed

* fix tests and languages

* move isSliceInt64Eq to util pkg; improve function names & typo

routers/private/branch.go

@@ -24,7 +24,29 @@ func GetProtectedBranchBy(ctx *macaron.Context) {
 		ctx.JSON(200, protectBranch)
 	} else {
 		ctx.JSON(200, &models.ProtectedBranch{
-			CanPush: true,
+			ID: 0,
+		})
+	}
+}
+
+// CanUserPush returns if user push
+func CanUserPush(ctx *macaron.Context) {
+	pbID := ctx.ParamsInt64(":pbid")
+	userID := ctx.ParamsInt64(":userid")
+
+	protectBranch, err := models.GetProtectedBranchByID(pbID)
+	if err != nil {
+		ctx.JSON(500, map[string]interface{}{
+			"err": err.Error(),
+		})
+		return
+	} else if protectBranch != nil {
+		ctx.JSON(200, map[string]interface{}{
+			"can_push": protectBranch.CanUserPush(userID),
+		})
+	} else {
+		ctx.JSON(200, map[string]interface{}{
+			"can_push": false,
 		})
 	}
 }