Add quota and limit for events

Signed-off-by: Asai Neko <sugar@sne.moe>

service/service_event/join_event.go

@@ -153,8 +153,44 @@ func (self *EventServiceImpl) JoinEvent(payload *EventJoinPayload) (result *Even
 
 	attendenceData.SetUserId(userId)
 	attendenceData.SetEventId(eventId)
-	attendenceData.SetRole("notmal")
-	attendenceData.SetState("success")
+	attendenceCount, err := attendenceData.CountUsersByEventID(payload.Context, eventId)
+	if err != nil {
+		return &EventJoinResult{
+			Common: shared.CommonResult{
+				HttpCode: 500,
+				Exception: new(exception.Builder).
+					SetStatus(exception.StatusServer).
+					SetService(exception.ServiceEvent).
+					SetEndpoint(exception.EndpointEventServiceJoin).
+					SetType(exception.TypeCommon).
+					SetOriginal(exception.CommonErrorDatabase).
+					SetError(err).
+					Throw(payload.Context),
+			},
+		}
+	}
+
+	if attendenceCount >= eventData.Quota {
+		if attendenceCount >= eventData.Limit {
+			return &EventJoinResult{
+				Common: shared.CommonResult{
+					HttpCode: 403,
+					Exception: new(exception.Builder).
+						SetStatus(exception.StatusUser).
+						SetService(exception.ServiceEvent).
+						SetEndpoint(exception.EndpointEventServiceJoin).
+						SetType(exception.TypeSpecific).
+						SetOriginal(exception.EventJoinLimitExceeded).
+						SetError(errors.New("event limit exceeded")).
+						Throw(payload.Context),
+				},
+			}
+		}
+		attendenceData.SetState("out_of_limit")
+	} else {
+		attendenceData.SetState("success")
+	}
+	attendenceData.SetRole("normal")
 
 	err = attendenceData.Create(payload.Context)
 	if err != nil {