nextcloud/lib/private/Avatar/UserAvatar.php

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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2018, Michael Weimann <mail@michael-weimann.eu>
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Michael Weimann <mail@michael-weimann.eu>
*
* @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\Avatar;
use OC\NotSquareException;
use OC\User\User;
use OC_Image;
use OCP\Files\NotFoundException;
use OCP\Files\NotPermittedException;
use OCP\Files\SimpleFS\ISimpleFile;
use OCP\Files\SimpleFS\ISimpleFolder;
use OCP\IConfig;
use OCP\IImage;
use OCP\IL10N;
use OCP\ILogger;
/**
* This class represents a registered user's avatar.
*/
class UserAvatar extends Avatar {
/** @var IConfig */
private $config;
/** @var ISimpleFolder */
private $folder;
/** @var IL10N */
private $l;
/** @var User */
private $user;
/**
* UserAvatar constructor.
*
* @param IConfig $config The configuration
* @param ISimpleFolder $folder The avatar files folder
* @param IL10N $l The localization helper
* @param User $user The user this class manages the avatar for
* @param ILogger $logger The logger
*/
public function __construct(
ISimpleFolder $folder,
IL10N $l,
$user,
ILogger $logger,
IConfig $config) {
parent::__construct($logger);
$this->folder = $folder;
$this->l = $l;
$this->user = $user;
$this->config = $config;
}
/**
* Check if an avatar exists for the user
*
* @return bool
*/
public function exists() {
return $this->folder->fileExists('avatar.jpg') || $this->folder->fileExists('avatar.png');
}
/**
* Sets the users avatar.
*
* @param IImage|resource|string $data An image object, imagedata or path to set a new avatar
* @throws \Exception if the provided file is not a jpg or png image
* @throws \Exception if the provided image is not valid
* @throws NotSquareException if the image is not square
* @return void
*/
public function set($data) {
$img = $this->getAvatarImage($data);
$data = $img->data();
$this->validateAvatar($img);
$this->remove(true);
$type = $this->getAvatarImageType($img);
$file = $this->folder->newFile('avatar.' . $type);
$file->putContent($data);
try {
$generated = $this->folder->getFile('generated');
$this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', 'false');
$generated->delete();
} catch (NotFoundException $e) {
//
}
$this->user->triggerChange('avatar', $file);
}
/**
* Returns an image from several sources.
*
* @param IImage|resource|string $data An image object, imagedata or path to the avatar
* @return IImage
*/
private function getAvatarImage($data) {
if ($data instanceof IImage) {
return $data;
}
$img = new OC_Image();
if (is_resource($data) && get_resource_type($data) === 'gd') {
$img->setResource($data);
} elseif (is_resource($data)) {
$img->loadFromFileHandle($data);
} else {
try {
// detect if it is a path or maybe the images as string
$result = @realpath($data);
if ($result === false || $result === null) {
$img->loadFromData($data);
} else {
$img->loadFromFile($data);
}
} catch (\Error $e) {
$img->loadFromData($data);
}
}
return $img;
}
/**
* Returns the avatar image type.
*
* @param IImage $avatar
* @return string
*/
private function getAvatarImageType(IImage $avatar) {
$type = substr($avatar->mimeType(), -3);
if ($type === 'peg') {
$type = 'jpg';
}
return $type;
}
/**
* Validates an avatar image:
* - must be "png" or "jpg"
* - must be "valid"
* - must be in square format
*
* @param IImage $avatar The avatar to validate
* @throws \Exception if the provided file is not a jpg or png image
* @throws \Exception if the provided image is not valid
* @throws NotSquareException if the image is not square
*/
private function validateAvatar(IImage $avatar) {
$type = $this->getAvatarImageType($avatar);
if ($type !== 'jpg' && $type !== 'png') {
throw new \Exception($this->l->t('Unknown filetype'));
}
if (!$avatar->valid()) {
throw new \Exception($this->l->t('Invalid image'));
}
if (!($avatar->height() === $avatar->width())) {
throw new NotSquareException($this->l->t('Avatar image is not square'));
}
}
/**
* Removes the users avatar.
* @return void
* @throws \OCP\Files\NotPermittedException
* @throws \OCP\PreConditionNotMetException
*/
public function remove(bool $silent = false) {
$avatars = $this->folder->getDirectoryListing();
$this->config->setUserValue($this->user->getUID(), 'avatar', 'version',
(int) $this->config->getUserValue($this->user->getUID(), 'avatar', 'version', 0) + 1);
foreach ($avatars as $avatar) {
$avatar->delete();
}
$this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', 'true');
if(!$silent) {
$this->user->triggerChange('avatar', '');
}
}
/**
* Get the extension of the avatar. If there is no avatar throw Exception
*
* @return string
* @throws NotFoundException
*/
private function getExtension() {
if ($this->folder->fileExists('avatar.jpg')) {
return 'jpg';
} elseif ($this->folder->fileExists('avatar.png')) {
return 'png';
}
throw new NotFoundException;
}
/**
* Returns the avatar for an user.
*
* If there is no avatar file yet, one is generated.
*
* @param int $size
* @return ISimpleFile
* @throws NotFoundException
* @throws \OCP\Files\NotPermittedException
* @throws \OCP\PreConditionNotMetException
*/
public function getFile($size) {
$size = (int) $size;
try {
$ext = $this->getExtension();
} catch (NotFoundException $e) {
if (!$data = $this->generateAvatarFromSvg(1024)) {
$data = $this->generateAvatar($this->getDisplayName(), 1024);
}
$avatar = $this->folder->newFile('avatar.png');
$avatar->putContent($data);
$ext = 'png';
$this->folder->newFile('generated');
$this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', 'true');
}
if ($size === -1) {
$path = 'avatar.' . $ext;
} else {
$path = 'avatar.' . $size . '.' . $ext;
}
try {
$file = $this->folder->getFile($path);
} catch (NotFoundException $e) {
if ($size <= 0) {
throw new NotFoundException;
}
if ($this->folder->fileExists('generated')) {
if (!$data = $this->generateAvatarFromSvg($size)) {
$data = $this->generateAvatar($this->getDisplayName(), $size);
}
} else {
$avatar = new OC_Image();
$file = $this->folder->getFile('avatar.' . $ext);
$avatar->loadFromData($file->getContent());
$avatar->resize($size);
$data = $avatar->data();
}
try {
$file = $this->folder->newFile($path);
$file->putContent($data);
} catch (NotPermittedException $e) {
$this->logger->error('Failed to save avatar for ' . $this->user->getUID());
throw new NotFoundException();
}
}
if ($this->config->getUserValue($this->user->getUID(), 'avatar', 'generated', null) === null) {
$generated = $this->folder->fileExists('generated') ? 'true' : 'false';
$this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', $generated);
}
return $file;
}
/**
* Returns the user display name.
*
* @return string
*/
public function getDisplayName(): string {
return $this->user->getDisplayName();
}
/**
* Handles user changes.
*
* @param string $feature The changed feature
* @param mixed $oldValue The previous value
* @param mixed $newValue The new value
* @throws NotPermittedException
* @throws \OCP\PreConditionNotMetException
*/
public function userChanged($feature, $oldValue, $newValue) {
// If the avatar is not generated (so an uploaded image) we skip this
if (!$this->folder->fileExists('generated')) {
return;
}
$this->remove();
}
/**
* Check if the avatar of a user is a custom uploaded one
*
* @return bool
*/
public function isCustomAvatar(): bool {
return $this->config->getUserValue($this->user->getUID(), 'avatar', 'generated', 'false') !== 'true';
}
}