refactor(backend): 引入端口接口模式

backend/internal/service/ports/group.go

@@ -0,0 +1,28 @@
+package ports
+
+import (
+	"context"
+
+	"sub2api/internal/model"
+	"sub2api/internal/pkg/pagination"
+
+	"gorm.io/gorm"
+)
+
+type GroupRepository interface {
+	Create(ctx context.Context, group *model.Group) error
+	GetByID(ctx context.Context, id int64) (*model.Group, error)
+	Update(ctx context.Context, group *model.Group) error
+	Delete(ctx context.Context, id int64) error
+
+	List(ctx context.Context, params pagination.PaginationParams) ([]model.Group, *pagination.PaginationResult, error)
+	ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, status string, isExclusive *bool) ([]model.Group, *pagination.PaginationResult, error)
+	ListActive(ctx context.Context) ([]model.Group, error)
+	ListActiveByPlatform(ctx context.Context, platform string) ([]model.Group, error)
+
+	ExistsByName(ctx context.Context, name string) (bool, error)
+	GetAccountCount(ctx context.Context, groupID int64) (int64, error)
+	DeleteAccountGroupsByGroupID(ctx context.Context, groupID int64) (int64, error)
+
+	DB() *gorm.DB
+}