Add checkin count in attendance and event api

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

data/attendance.go

@@ -149,6 +149,29 @@ func (self *Attendance) CountUsersByEventID(ctx context.Context, eventID uuid.UU
 		Where("event_id = ?", eventID).
 		Count(&count).Error
 
+	if err == gorm.ErrRecordNotFound {
+		return 0, nil
+	}
+
+	if err != nil {
+		return 0, err
+	}
+
+	return count, nil
+}
+
+func (self *Attendance) CountCheckedInUsersByEventID(ctx context.Context, eventID uuid.UUID) (int64, error) {
+	var count int64
+
+	err := Database.WithContext(ctx).
+		Model(&Attendance{}).
+		Where("event_id = ? AND checkin_at IS NOT NULL AND checkin_at > ?", eventID, time.Time{}). // 过滤未签到用户
+		Count(&count).Error
+
+	if err == gorm.ErrRecordNotFound {
+		return 0, nil
+	}
+
 	if err != nil {
 		return 0, err
 	}

data/event.go

@@ -25,13 +25,14 @@ type Event struct {
 }
 
 type EventIndexDoc struct {
-	EventId     string    `json:"event_id"`
-	Name        string    `json:"name"`
-	Type        string    `json:"type"`
-	Description string    `json:"description"`
-	StartTime   time.Time `json:"start_time"`
-	EndTime     time.Time `json:"end_time"`
-	Thumbnail   string    `json:"thumbnail"`
+	EventId      string    `json:"event_id"`
+	Name         string    `json:"name"`
+	Type         string    `json:"type"`
+	Description  string    `json:"description"`
+	StartTime    time.Time `json:"start_time"`
+	EndTime      time.Time `json:"end_time"`
+	Thumbnail    string    `json:"thumbnail"`
+	CheckinCount int64     `json:"checkin_count"`
 }
 
 func (self *Event) GetEventById(ctx context.Context, eventId uuid.UUID) (*Event, error) {