精简后的项目：仅保留 api/ui 源码、文档、构建依赖

api/graphql/models/actions/user_actions.go

@@ -0,0 +1,84 @@
+package actions
+
+import (
+	"errors"
+	"os"
+	"path"
+	"strconv"
+
+	"github.com/photoview/photoview/api/graphql/models"
+	"github.com/photoview/photoview/api/utils"
+	"gorm.io/gorm"
+)
+
+func DeleteUser(db *gorm.DB, userID int) (*models.User, error) {
+
+	// make sure the last admin user is not deleted
+	var adminUsers []*models.User
+	db.Model(&models.User{}).Where("admin = true").Limit(2).Find(&adminUsers)
+	if len(adminUsers) == 1 && adminUsers[0].ID == userID {
+		return nil, errors.New("deleting sole admin user is not allowed")
+	}
+
+	var user models.User
+	deletedAlbumIDs := make([]int, 0)
+
+	var err error
+	err = db.Transaction(func(tx *gorm.DB) error {
+		if err = tx.First(&user, userID).Error; err != nil {
+			return err
+		}
+
+		userAlbums := user.Albums
+		if err = tx.Model(&user).Association("Albums").Find(&userAlbums); err != nil {
+			return err
+		}
+
+		if err = tx.Model(&user).Association("Albums").Clear(); err != nil {
+			return err
+		}
+
+		deletedAlbumIDs, err = deleteNotOwnedAlbums(userAlbums, tx, deletedAlbumIDs)
+		if err != nil {
+			return err
+		}
+
+		if err = tx.Delete(&user).Error; err != nil {
+			return err
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	// If there is only one associated user, clean up the cache folder and delete the album row
+	return &user, cleanup(deletedAlbumIDs)
+}
+
+func cleanup(deletedAlbumIDs []int) error {
+	var err error
+	for _, deletedAlbumID := range deletedAlbumIDs {
+		cachePath := path.Join(utils.MediaCachePath(), strconv.Itoa(int(deletedAlbumID)))
+		if err = os.RemoveAll(cachePath); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+func deleteNotOwnedAlbums(userAlbums []models.Album, tx *gorm.DB, deletedAlbumIDs []int) ([]int, error) {
+	for _, album := range userAlbums {
+		var associatedUsers = tx.Model(album).Association("Owners").Count()
+
+		if associatedUsers == 0 {
+			deletedAlbumIDs = append(deletedAlbumIDs, album.ID)
+			if err := tx.Delete(album).Error; err != nil {
+				return nil, err
+			}
+		}
+	}
+	return deletedAlbumIDs, nil
+}