Move user/org deletion to services (#17673)

services/user/user.go

@@ -0,0 +1,106 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package user
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"code.gitea.io/gitea/models"
+	admin_model "code.gitea.io/gitea/models/admin"
+	"code.gitea.io/gitea/models/db"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/storage"
+	"code.gitea.io/gitea/modules/util"
+)
+
+// DeleteUser completely and permanently deletes everything of a user,
+// but issues/comments/pulls will be kept and shown as someone has been deleted,
+// unless the user is younger than USER_DELETE_WITH_COMMENTS_MAX_DAYS.
+func DeleteUser(u *models.User) error {
+	if u.IsOrganization() {
+		return fmt.Errorf("%s is an organization not a user", u.Name)
+	}
+
+	ctx, commiter, err := db.TxContext()
+	if err != nil {
+		return err
+	}
+	defer commiter.Close()
+
+	// Note: A user owns any repository or belongs to any organization
+	//	cannot perform delete operation.
+
+	// Check ownership of repository.
+	count, err := models.GetRepositoryCount(ctx, u)
+	if err != nil {
+		return fmt.Errorf("GetRepositoryCount: %v", err)
+	} else if count > 0 {
+		return models.ErrUserOwnRepos{UID: u.ID}
+	}
+
+	// Check membership of organization.
+	count, err = models.GetOrganizationCount(ctx, u)
+	if err != nil {
+		return fmt.Errorf("GetOrganizationCount: %v", err)
+	} else if count > 0 {
+		return models.ErrUserHasOrgs{UID: u.ID}
+	}
+
+	if err := models.DeleteUser(ctx, u); err != nil {
+		return fmt.Errorf("DeleteUser: %v", err)
+	}
+
+	if err := commiter.Commit(); err != nil {
+		return err
+	}
+
+	// Note: There are something just cannot be roll back,
+	//	so just keep error logs of those operations.
+	path := models.UserPath(u.Name)
+	if err := util.RemoveAll(path); err != nil {
+		err = fmt.Errorf("Failed to RemoveAll %s: %v", path, err)
+		_ = admin_model.CreateNotice(db.DefaultContext, admin_model.NoticeTask, fmt.Sprintf("delete user '%s': %v", u.Name, err))
+		return err
+	}
+
+	if u.Avatar != "" {
+		avatarPath := u.CustomAvatarRelativePath()
+		if err := storage.Avatars.Delete(avatarPath); err != nil {
+			err = fmt.Errorf("Failed to remove %s: %v", avatarPath, err)
+			_ = admin_model.CreateNotice(db.DefaultContext, admin_model.NoticeTask, fmt.Sprintf("delete user '%s': %v", u.Name, err))
+			return err
+		}
+	}
+
+	return nil
+}
+
+// DeleteInactiveUsers deletes all inactive users and email addresses.
+func DeleteInactiveUsers(ctx context.Context, olderThan time.Duration) error {
+	users, err := models.GetInactiveUsers(ctx, olderThan)
+	if err != nil {
+		return err
+	}
+
+	// FIXME: should only update authorized_keys file once after all deletions.
+	for _, u := range users {
+		select {
+		case <-ctx.Done():
+			return db.ErrCancelledf("Before delete inactive user %s", u.Name)
+		default:
+		}
+		if err := DeleteUser(u); err != nil {
+			// Ignore users that were set inactive by admin.
+			if models.IsErrUserOwnRepos(err) || models.IsErrUserHasOrgs(err) {
+				continue
+			}
+			return err
+		}
+	}
+
+	return user_model.DeleteInactiveEmailAddresses(ctx)
+}