Add findFolder and findFolders queries to graphql schema (#5965)

* Add findFolder and findFolders queries to graphql schema
* Add zip file criterion to file and folder queries

internal/api/resolver_query_find_folder.go

@@ -0,0 +1,100 @@
+package api
+
+import (
+	"context"
+	"errors"
+	"strconv"
+
+	"github.com/stashapp/stash/pkg/models"
+	"github.com/stashapp/stash/pkg/sliceutil/stringslice"
+)
+
+func (r *queryResolver) FindFolder(ctx context.Context, id *string, path *string) (*models.Folder, error) {
+	var ret *models.Folder
+	if err := r.withReadTxn(ctx, func(ctx context.Context) error {
+		qb := r.repository.Folder
+		var err error
+		switch {
+		case id != nil:
+			idInt, err := strconv.Atoi(*id)
+			if err != nil {
+				return err
+			}
+			ret, err = qb.Find(ctx, models.FolderID(idInt))
+			if err != nil {
+				return err
+			}
+		case path != nil:
+			ret, err = qb.FindByPath(ctx, *path)
+			if err == nil && ret == nil {
+				return errors.New("folder not found")
+			}
+		default:
+			return errors.New("either id or path must be provided")
+		}
+
+		return err
+	}); err != nil {
+		return nil, err
+	}
+
+	return ret, nil
+}
+
+func (r *queryResolver) FindFolders(
+	ctx context.Context,
+	folderFilter *models.FolderFilterType,
+	filter *models.FindFilterType,
+	ids []string,
+) (ret *FindFoldersResultType, err error) {
+	var folderIDs []models.FolderID
+	if len(ids) > 0 {
+		folderIDsInt, err := stringslice.StringSliceToIntSlice(ids)
+		if err != nil {
+			return nil, err
+		}
+
+		folderIDs = models.FolderIDsFromInts(folderIDsInt)
+	}
+
+	if err := r.withReadTxn(ctx, func(ctx context.Context) error {
+		var folders []*models.Folder
+		var err error
+
+		fields := collectQueryFields(ctx)
+		result := &models.FolderQueryResult{}
+
+		if len(folderIDs) > 0 {
+			folders, err = r.repository.Folder.FindMany(ctx, folderIDs)
+			if err == nil {
+				result.Count = len(folders)
+			}
+		} else {
+			result, err = r.repository.Folder.Query(ctx, models.FolderQueryOptions{
+				QueryOptions: models.QueryOptions{
+					FindFilter: filter,
+					Count:      fields.Has("count"),
+				},
+				FolderFilter: folderFilter,
+			})
+			if err == nil {
+				folders, err = result.Resolve(ctx)
+			}
+		}
+
+		if err != nil {
+			return err
+		}
+
+		ret = &FindFoldersResultType{
+			Count:   result.Count,
+			Folders: folders,
+		}
+
+		return nil
+	}); err != nil {
+		return nil, err
+	}
+
+	return ret, nil
+}