Use a lazy user for the file owner when listing a directory

Only getUID and getDisplayName are called on the file owner objects anyway
and we can get this information often without DB request

Signed-off-by: Robin Appelman <robin@icewind.nl>

1 files changed, 149 insertions, 0 deletions

diff --git a/lib/private/User/LazyUser.php b/lib/private/User/LazyUser.php
new file mode 100644
index 00000000000..8b98b112731
--- /dev/null
+++ b/lib/private/User/LazyUser.php
@@ -0,0 +1,149 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2022 Robin Appelman <robin@icewind.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OC\User;
+
+use OCP\IUser;
+use OCP\IUserManager;
+
+class LazyUser implements IUser {
+	private ?IUser $user = null;
+	private DisplayNameCache $displayNameCache;
+	private string $uid;
+	private IUserManager $userManager;
+
+	public function __construct(string $uid, DisplayNameCache $displayNameCache, IUserManager $userManager) {
+		$this->displayNameCache = $displayNameCache;
+		$this->uid = $uid;
+		$this->userManager = $userManager;
+	}
+
+	private function getUser(): IUser {
+		if ($this->user === null) {
+			$this->user = $this->userManager->get($this->uid);
+		}
+		/** @var IUser */
+		$user = $this->user;
+		return $user;
+	}
+
+	public function getUID() {
+		return $this->uid;
+	}
+
+	public function getDisplayName() {
+		return $this->displayNameCache->getDisplayName($this->uid);
+	}
+
+	public function setDisplayName($displayName) {
+		return $this->getUser()->setDisplayName($displayName);
+	}
+
+	public function getLastLogin() {
+		return $this->getUser()->getLastLogin();
+	}
+
+	public function updateLastLoginTimestamp() {
+		return $this->getUser()->updateLastLoginTimestamp();
+	}
+
+	public function delete() {
+		return $this->getUser()->delete();
+	}
+
+	public function setPassword($password, $recoveryPassword = null) {
+		return $this->getUser()->setPassword($password, $recoveryPassword);
+	}
+
+	public function getHome() {
+		return $this->getUser()->getHome();
+	}
+
+	public function getBackendClassName() {
+		return $this->getUser()->getBackendClassName();
+	}
+
+	public function getBackend() {
+		return $this->getUser()->getBackend();
+	}
+
+	public function canChangeAvatar() {
+		return $this->getUser()->canChangeAvatar();
+	}
+
+	public function canChangePassword() {
+		return $this->getUser()->canChangePassword();
+	}
+
+	public function canChangeDisplayName() {
+		return $this->getUser()->canChangeDisplayName();
+	}
+
+	public function isEnabled() {
+		return $this->getUser()->isEnabled();
+	}
+
+	public function setEnabled(bool $enabled = true) {
+		return $this->getUser()->setEnabled($enabled);
+	}
+
+	public function getEMailAddress() {
+		return $this->getUser()->getEMailAddress();
+	}
+
+	public function getSystemEMailAddress(): ?string {
+		return $this->getUser()->getSystemEMailAddress();
+	}
+
+	public function getPrimaryEMailAddress(): ?string {
+		return $this->getUser()->getPrimaryEMailAddress();
+	}
+
+	public function getAvatarImage($size) {
+		return $this->getUser()->getAvatarImage($size);
+	}
+
+	public function getCloudId() {
+		return $this->getUser()->getCloudId();
+	}
+
+	public function setEMailAddress($mailAddress) {
+		$this->getUser()->setEMailAddress($mailAddress);
+	}
+
+	public function setSystemEMailAddress(string $mailAddress): void {
+		$this->getUser()->setSystemEMailAddress($mailAddress);
+	}
+
+	public function setPrimaryEMailAddress(string $mailAddress): void {
+		$this->getUser()->setPrimaryEMailAddress($mailAddress);
+	}
+
+	public function getQuota() {
+		return $this->getUser()->getQuota();
+	}
+
+	public function setQuota($quota) {
+		$this->getUser()->setQuota($quota);
+	}
+}