Containing Group/Sub-Group relationships (#5105)

* Add UI support for setting containing groups
* Show containing groups in group details panel
* Move tag hierarchical filter code into separate type
* Add depth to scene_count and add sub_group_count
* Add sub-groups tab to groups page
* Add containing groups to edit groups dialog
* Show containing group description in sub-group view
* Show group scene number in group scenes view
* Add ability to drag move grid cards
* Add sub group order option
* Add reorder sub-groups interface
* Separate page size selector component
* Add interfaces to add and remove sub-groups to a group
* Separate MultiSet components
* Allow setting description while setting containing groups

pkg/group/create.go

@@ -0,0 +1,41 @@
+package group
+
+import (
+	"context"
+	"errors"
+
+	"github.com/stashapp/stash/pkg/models"
+)
+
+var (
+	ErrEmptyName     = errors.New("name cannot be empty")
+	ErrHierarchyLoop = errors.New("a group cannot be contained by one of its subgroups")
+)
+
+func (s *Service) Create(ctx context.Context, group *models.Group, frontimageData []byte, backimageData []byte) error {
+	r := s.Repository
+
+	if err := s.validateCreate(ctx, group); err != nil {
+		return err
+	}
+
+	err := r.Create(ctx, group)
+	if err != nil {
+		return err
+	}
+
+	// update image table
+	if len(frontimageData) > 0 {
+		if err := r.UpdateFrontImage(ctx, group.ID, frontimageData); err != nil {
+			return err
+		}
+	}
+
+	if len(backimageData) > 0 {
+		if err := r.UpdateBackImage(ctx, group.ID, backimageData); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}