Initial backend repository commit.

Set up project files and add .gitignore to exclude local build/runtime artifacts.

Made-with: Cursor

internal/repository/system_notification_repo.go

@@ -0,0 +1,114 @@
+package repository
+
+import (
+	"carrot_bbs/internal/model"
+
+	"gorm.io/gorm"
+)
+
+// SystemNotificationRepository 系统通知仓储
+type SystemNotificationRepository struct {
+	db *gorm.DB
+}
+
+// NewSystemNotificationRepository 创建系统通知仓储
+func NewSystemNotificationRepository(db *gorm.DB) *SystemNotificationRepository {
+	return &SystemNotificationRepository{db: db}
+}
+
+// Create 创建系统通知
+func (r *SystemNotificationRepository) Create(notification *model.SystemNotification) error {
+	return r.db.Create(notification).Error
+}
+
+// GetByID 根据ID获取通知
+func (r *SystemNotificationRepository) GetByID(id int64) (*model.SystemNotification, error) {
+	var notification model.SystemNotification
+	err := r.db.First(&notification, "id = ?", id).Error
+	if err != nil {
+		return nil, err
+	}
+	return &notification, nil
+}
+
+// GetByReceiverID 获取用户的通知列表
+func (r *SystemNotificationRepository) GetByReceiverID(receiverID string, page, pageSize int) ([]*model.SystemNotification, int64, error) {
+	var notifications []*model.SystemNotification
+	var total int64
+
+	query := r.db.Model(&model.SystemNotification{}).Where("receiver_id = ?", receiverID)
+	query.Count(&total)
+
+	offset := (page - 1) * pageSize
+	err := query.Offset(offset).
+		Limit(pageSize).
+		Order("created_at DESC").
+		Find(&notifications).Error
+
+	return notifications, total, err
+}
+
+// GetUnreadByReceiverID 获取用户的未读通知列表
+func (r *SystemNotificationRepository) GetUnreadByReceiverID(receiverID string, limit int) ([]*model.SystemNotification, error) {
+	var notifications []*model.SystemNotification
+	err := r.db.Where("receiver_id = ? AND is_read = ?", receiverID, false).
+		Order("created_at DESC").
+		Limit(limit).
+		Find(&notifications).Error
+	return notifications, err
+}
+
+// GetUnreadCount 获取用户未读通知数量
+func (r *SystemNotificationRepository) GetUnreadCount(receiverID string) (int64, error) {
+	var count int64
+	err := r.db.Model(&model.SystemNotification{}).
+		Where("receiver_id = ? AND is_read = ?", receiverID, false).
+		Count(&count).Error
+	return count, err
+}
+
+// MarkAsRead 标记单条通知为已读
+func (r *SystemNotificationRepository) MarkAsRead(id int64, receiverID string) error {
+	now := model.SystemNotification{}.UpdatedAt
+	return r.db.Model(&model.SystemNotification{}).
+		Where("id = ? AND receiver_id = ?", id, receiverID).
+		Updates(map[string]interface{}{
+			"is_read": true,
+			"read_at": now,
+		}).Error
+}
+
+// MarkAllAsRead 标记用户所有通知为已读
+func (r *SystemNotificationRepository) MarkAllAsRead(receiverID string) error {
+	now := model.SystemNotification{}.UpdatedAt
+	return r.db.Model(&model.SystemNotification{}).
+		Where("receiver_id = ? AND is_read = ?", receiverID, false).
+		Updates(map[string]interface{}{
+			"is_read": true,
+			"read_at": now,
+		}).Error
+}
+
+// Delete 删除通知（软删除）
+func (r *SystemNotificationRepository) Delete(id int64, receiverID string) error {
+	return r.db.Where("id = ? AND receiver_id = ?", id, receiverID).
+		Delete(&model.SystemNotification{}).Error
+}
+
+// GetByType 获取用户指定类型的通知
+func (r *SystemNotificationRepository) GetByType(receiverID string, notifyType model.SystemNotificationType, page, pageSize int) ([]*model.SystemNotification, int64, error) {
+	var notifications []*model.SystemNotification
+	var total int64
+
+	query := r.db.Model(&model.SystemNotification{}).
+		Where("receiver_id = ? AND type = ?", receiverID, notifyType)
+	query.Count(&total)
+
+	offset := (page - 1) * pageSize
+	err := query.Offset(offset).
+		Limit(pageSize).
+		Order("created_at DESC").
+		Find(&notifications).Error
+
+	return notifications, total, err
+}