Add join count to event api

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

service/service_event/get_event_info.go

@@ -45,6 +45,27 @@ func (self *EventServiceImpl) GetEventInfo(payload *EventInfoPayload) (result *E
 		return
 	}
 
+	joinCount, err := new(data.Attendance).CountUsersByEventID(payload.Context, payload.Data.EventId)
+	if err != nil {
+		exception := new(exception.Builder).
+			SetStatus(exception.StatusUser).
+			SetService(exception.ServiceEvent).
+			SetEndpoint(exception.EndpointEventServiceInfo).
+			SetType(exception.TypeCommon).
+			SetOriginal(exception.CommonErrorDatabase).
+			SetError(err).
+			Throw(payload.Context)
+
+		result = &EventInfoResult{
+			Common: shared.CommonResult{
+				HttpCode:  500,
+				Exception: exception,
+			},
+		}
+
+		return
+	}
+
 	checkinCount, err := new(data.Attendance).CountCheckedInUsersByEventID(payload.Context, payload.Data.EventId)
 	if err != nil {
 		exception := new(exception.Builder).
@@ -85,6 +106,7 @@ func (self *EventServiceImpl) GetEventInfo(payload *EventInfoPayload) (result *E
 			StartTime:    event.StartTime,
 			EndTime:      event.EndTime,
 			Thumbnail:    event.Thumbnail,
+			JoinCount:    joinCount,
 			CheckinCount: checkinCount,
 		},
 	}