nextcloud / server

lib/private/Avatar/UserAvatar.php

Indentation +291 added lines, -291 removed lines

@@ -44,295 +44,295 @@
  * 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');
-			$generated->delete();
-		} catch (NotFoundException $e) {
-			//
-		}
-
-		$this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', 'false');
-		$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';
-	}
+    /** @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');
+            $generated->delete();
+        } catch (NotFoundException $e) {
+            //
+        }
+
+        $this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', 'false');
+        $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';
+    }
 }

apps/dav/lib/CardDAV/PhotoCache.php

Indentation +249 added lines, -249 removed lines

@@ -39,253 +39,253 @@
 
 class PhotoCache {
 
-	/** @var array  */
-	protected const ALLOWED_CONTENT_TYPES = [
-		'image/png' => 'png',
-		'image/jpeg' => 'jpg',
-		'image/gif' => 'gif',
-		'image/vnd.microsoft.icon' => 'ico',
-	];
-
-	/** @var IAppData */
-	protected $appData;
-
-	/** @var ILogger */
-	protected $logger;
-
-	/**
-	 * PhotoCache constructor.
-	 *
-	 * @param IAppData $appData
-	 * @param ILogger $logger
-	 */
-	public function __construct(IAppData $appData, ILogger $logger) {
-		$this->appData = $appData;
-		$this->logger = $logger;
-	}
-
-	/**
-	 * @param int $addressBookId
-	 * @param string $cardUri
-	 * @param int $size
-	 * @param Card $card
-	 *
-	 * @return ISimpleFile
-	 * @throws NotFoundException
-	 */
-	public function get($addressBookId, $cardUri, $size, Card $card) {
-		$folder = $this->getFolder($addressBookId, $cardUri);
-
-		if ($this->isEmpty($folder)) {
-			$this->init($folder, $card);
-		}
-
-		if (!$this->hasPhoto($folder)) {
-			throw new NotFoundException();
-		}
-
-		if ($size !== -1) {
-			$size = 2 ** ceil(log($size) / log(2));
-		}
-
-		return $this->getFile($folder, $size);
-	}
-
-	/**
-	 * @param ISimpleFolder $folder
-	 * @return bool
-	 */
-	private function isEmpty(ISimpleFolder $folder) {
-		return $folder->getDirectoryListing() === [];
-	}
-
-	/**
-	 * @param ISimpleFolder $folder
-	 * @param Card $card
-	 * @throws NotPermittedException
-	 */
-	private function init(ISimpleFolder $folder, Card $card): void {
-		$data = $this->getPhoto($card);
-
-		if ($data === false || !isset($data['Content-Type'])) {
-			$folder->newFile('nophoto', '');
-			return;
-		}
-
-		$contentType = $data['Content-Type'];
-		$extension = self::ALLOWED_CONTENT_TYPES[$contentType] ?? null;
-
-		if ($extension === null) {
-			$folder->newFile('nophoto', '');
-			return;
-		}
-
-		$file = $folder->newFile('photo.' . $extension);
-		$file->putContent($data['body']);
-	}
-
-	private function hasPhoto(ISimpleFolder $folder) {
-		return !$folder->fileExists('nophoto');
-	}
-
-	private function getFile(ISimpleFolder $folder, $size) {
-		$ext = $this->getExtension($folder);
-
-		if ($size === -1) {
-			$path = 'photo.' . $ext;
-		} else {
-			$path = 'photo.' . $size . '.' . $ext;
-		}
-
-		try {
-			$file = $folder->getFile($path);
-		} catch (NotFoundException $e) {
-			if ($size <= 0) {
-				throw new NotFoundException;
-			}
-
-			$photo = new \OC_Image();
-			/** @var ISimpleFile $file */
-			$file = $folder->getFile('photo.' . $ext);
-			$photo->loadFromData($file->getContent());
-
-			$ratio = $photo->width() / $photo->height();
-			if ($ratio < 1) {
-				$ratio = 1 / $ratio;
-			}
-
-			$size = (int) ($size * $ratio);
-			if ($size !== -1) {
-				$photo->resize($size);
-			}
-
-			try {
-				$file = $folder->newFile($path);
-				$file->putContent($photo->data());
-			} catch (NotPermittedException $e) {
-
-			}
-		}
-
-		return $file;
-	}
-
-	/**
-	 * @throws NotFoundException
-	 * @throws NotPermittedException
-	 */
-	private function getFolder(int $addressBookId, string $cardUri, bool $createIfNotExists = true): ISimpleFolder {
-		$hash = md5($addressBookId . ' ' . $cardUri);
-		try {
-			return $this->appData->getFolder($hash);
-		} catch (NotFoundException $e) {
-			if($createIfNotExists) {
-				return $this->appData->newFolder($hash);
-			} else {
-				throw $e;
-			}
-		}
-	}
-
-	/**
-	 * Get the extension of the avatar. If there is no avatar throw Exception
-	 *
-	 * @param ISimpleFolder $folder
-	 * @return string
-	 * @throws NotFoundException
-	 */
-	private function getExtension(ISimpleFolder $folder): string {
-		foreach (self::ALLOWED_CONTENT_TYPES as $extension) {
-			if ($folder->fileExists('photo.' . $extension)) {
-				return $extension;
-			}
-		}
-
-		throw new NotFoundException('Avatar not found');
-	}
-
-	private function getPhoto(Card $node) {
-		try {
-			$vObject = $this->readCard($node->get());
-			if (!$vObject->PHOTO) {
-				return false;
-			}
-
-			$photo = $vObject->PHOTO;
-			$val = $photo->getValue();
-
-			// handle data URI. e.g PHOTO;VALUE=URI:data:image/jpeg;base64,/9j/4AAQSkZJRgABAQE
-			if ($photo->getValueType() === 'URI') {
-				$parsed = \Sabre\URI\parse($val);
-
-				// only allow data://
-				if ($parsed['scheme'] !== 'data') {
-					return false;
-				}
-				if (substr_count($parsed['path'], ';') === 1) {
-					list($type) = explode(';', $parsed['path']);
-				}
-				$val = file_get_contents($val);
-			} else {
-				// get type if binary data
-				$type = $this->getBinaryType($photo);
-			}
-
-			if (empty($type) || !isset(self::ALLOWED_CONTENT_TYPES[$type])) {
-				$type = 'application/octet-stream';
-			}
-
-			return [
-				'Content-Type' => $type,
-				'body'         => $val
-			];
-		} catch (\Exception $e) {
-			$this->logger->logException($e, [
-				'message' => 'Exception during vcard photo parsing'
-			]);
-		}
-		return false;
-	}
-
-	/**
-	 * @param string $cardData
-	 * @return \Sabre\VObject\Document
-	 */
-	private function readCard($cardData) {
-		return Reader::read($cardData);
-	}
-
-	/**
-	 * @param Binary $photo
-	 * @return string
-	 */
-	private function getBinaryType(Binary $photo) {
-		$params = $photo->parameters();
-		if (isset($params['TYPE']) || isset($params['MEDIATYPE'])) {
-			/** @var Parameter $typeParam */
-			$typeParam = isset($params['TYPE']) ? $params['TYPE'] : $params['MEDIATYPE'];
-			$type = $typeParam->getValue();
-
-			if (strpos($type, 'image/') === 0) {
-				return $type;
-			} else {
-				return 'image/' . strtolower($type);
-			}
-		}
-		return '';
-	}
-
-	/**
-	 * @param int $addressBookId
-	 * @param string $cardUri
-	 * @throws NotPermittedException
-	 */
-	public function delete($addressBookId, $cardUri) {
-		try {
-			$folder = $this->getFolder($addressBookId, $cardUri, false);
-			$folder->delete();
-		} catch (NotFoundException $e) {
-			// that's OK, nothing to do
-		}
-	}
+    /** @var array  */
+    protected const ALLOWED_CONTENT_TYPES = [
+        'image/png' => 'png',
+        'image/jpeg' => 'jpg',
+        'image/gif' => 'gif',
+        'image/vnd.microsoft.icon' => 'ico',
+    ];
+
+    /** @var IAppData */
+    protected $appData;
+
+    /** @var ILogger */
+    protected $logger;
+
+    /**
+     * PhotoCache constructor.
+     *
+     * @param IAppData $appData
+     * @param ILogger $logger
+     */
+    public function __construct(IAppData $appData, ILogger $logger) {
+        $this->appData = $appData;
+        $this->logger = $logger;
+    }
+
+    /**
+     * @param int $addressBookId
+     * @param string $cardUri
+     * @param int $size
+     * @param Card $card
+     *
+     * @return ISimpleFile
+     * @throws NotFoundException
+     */
+    public function get($addressBookId, $cardUri, $size, Card $card) {
+        $folder = $this->getFolder($addressBookId, $cardUri);
+
+        if ($this->isEmpty($folder)) {
+            $this->init($folder, $card);
+        }
+
+        if (!$this->hasPhoto($folder)) {
+            throw new NotFoundException();
+        }
+
+        if ($size !== -1) {
+            $size = 2 ** ceil(log($size) / log(2));
+        }
+
+        return $this->getFile($folder, $size);
+    }
+
+    /**
+     * @param ISimpleFolder $folder
+     * @return bool
+     */
+    private function isEmpty(ISimpleFolder $folder) {
+        return $folder->getDirectoryListing() === [];
+    }
+
+    /**
+     * @param ISimpleFolder $folder
+     * @param Card $card
+     * @throws NotPermittedException
+     */
+    private function init(ISimpleFolder $folder, Card $card): void {
+        $data = $this->getPhoto($card);
+
+        if ($data === false || !isset($data['Content-Type'])) {
+            $folder->newFile('nophoto', '');
+            return;
+        }
+
+        $contentType = $data['Content-Type'];
+        $extension = self::ALLOWED_CONTENT_TYPES[$contentType] ?? null;
+
+        if ($extension === null) {
+            $folder->newFile('nophoto', '');
+            return;
+        }
+
+        $file = $folder->newFile('photo.' . $extension);
+        $file->putContent($data['body']);
+    }
+
+    private function hasPhoto(ISimpleFolder $folder) {
+        return !$folder->fileExists('nophoto');
+    }
+
+    private function getFile(ISimpleFolder $folder, $size) {
+        $ext = $this->getExtension($folder);
+
+        if ($size === -1) {
+            $path = 'photo.' . $ext;
+        } else {
+            $path = 'photo.' . $size . '.' . $ext;
+        }
+
+        try {
+            $file = $folder->getFile($path);
+        } catch (NotFoundException $e) {
+            if ($size <= 0) {
+                throw new NotFoundException;
+            }
+
+            $photo = new \OC_Image();
+            /** @var ISimpleFile $file */
+            $file = $folder->getFile('photo.' . $ext);
+            $photo->loadFromData($file->getContent());
+
+            $ratio = $photo->width() / $photo->height();
+            if ($ratio < 1) {
+                $ratio = 1 / $ratio;
+            }
+
+            $size = (int) ($size * $ratio);
+            if ($size !== -1) {
+                $photo->resize($size);
+            }
+
+            try {
+                $file = $folder->newFile($path);
+                $file->putContent($photo->data());
+            } catch (NotPermittedException $e) {
+
+            }
+        }
+
+        return $file;
+    }
+
+    /**
+     * @throws NotFoundException
+     * @throws NotPermittedException
+     */
+    private function getFolder(int $addressBookId, string $cardUri, bool $createIfNotExists = true): ISimpleFolder {
+        $hash = md5($addressBookId . ' ' . $cardUri);
+        try {
+            return $this->appData->getFolder($hash);
+        } catch (NotFoundException $e) {
+            if($createIfNotExists) {
+                return $this->appData->newFolder($hash);
+            } else {
+                throw $e;
+            }
+        }
+    }
+
+    /**
+     * Get the extension of the avatar. If there is no avatar throw Exception
+     *
+     * @param ISimpleFolder $folder
+     * @return string
+     * @throws NotFoundException
+     */
+    private function getExtension(ISimpleFolder $folder): string {
+        foreach (self::ALLOWED_CONTENT_TYPES as $extension) {
+            if ($folder->fileExists('photo.' . $extension)) {
+                return $extension;
+            }
+        }
+
+        throw new NotFoundException('Avatar not found');
+    }
+
+    private function getPhoto(Card $node) {
+        try {
+            $vObject = $this->readCard($node->get());
+            if (!$vObject->PHOTO) {
+                return false;
+            }
+
+            $photo = $vObject->PHOTO;
+            $val = $photo->getValue();
+
+            // handle data URI. e.g PHOTO;VALUE=URI:data:image/jpeg;base64,/9j/4AAQSkZJRgABAQE
+            if ($photo->getValueType() === 'URI') {
+                $parsed = \Sabre\URI\parse($val);
+
+                // only allow data://
+                if ($parsed['scheme'] !== 'data') {
+                    return false;
+                }
+                if (substr_count($parsed['path'], ';') === 1) {
+                    list($type) = explode(';', $parsed['path']);
+                }
+                $val = file_get_contents($val);
+            } else {
+                // get type if binary data
+                $type = $this->getBinaryType($photo);
+            }
+
+            if (empty($type) || !isset(self::ALLOWED_CONTENT_TYPES[$type])) {
+                $type = 'application/octet-stream';
+            }
+
+            return [
+                'Content-Type' => $type,
+                'body'         => $val
+            ];
+        } catch (\Exception $e) {
+            $this->logger->logException($e, [
+                'message' => 'Exception during vcard photo parsing'
+            ]);
+        }
+        return false;
+    }
+
+    /**
+     * @param string $cardData
+     * @return \Sabre\VObject\Document
+     */
+    private function readCard($cardData) {
+        return Reader::read($cardData);
+    }
+
+    /**
+     * @param Binary $photo
+     * @return string
+     */
+    private function getBinaryType(Binary $photo) {
+        $params = $photo->parameters();
+        if (isset($params['TYPE']) || isset($params['MEDIATYPE'])) {
+            /** @var Parameter $typeParam */
+            $typeParam = isset($params['TYPE']) ? $params['TYPE'] : $params['MEDIATYPE'];
+            $type = $typeParam->getValue();
+
+            if (strpos($type, 'image/') === 0) {
+                return $type;
+            } else {
+                return 'image/' . strtolower($type);
+            }
+        }
+        return '';
+    }
+
+    /**
+     * @param int $addressBookId
+     * @param string $cardUri
+     * @throws NotPermittedException
+     */
+    public function delete($addressBookId, $cardUri) {
+        try {
+            $folder = $this->getFolder($addressBookId, $cardUri, false);
+            $folder->delete();
+        } catch (NotFoundException $e) {
+            // that's OK, nothing to do
+        }
+    }
 }