image = $image; $this->imageTool = $imageTool; $this->cache = $cache; $this->http = $http; parent::__construct($fileSystem); } /** * Get the storage that will be used for storing images. * @param string $type * @return \Illuminate\Contracts\Filesystem\Filesystem */ protected function getStorage($type = '') { $storageType = config('filesystems.images'); // Ensure system images (App logo) are uploaded to a public space if ($type === 'system' && $storageType === 'local_secure') { $storageType = 'local'; } return $this->fileSystem->disk($storageType); } /** * Saves a new image from an upload. * @param UploadedFile $uploadedFile * @param string $type * @param int $uploadedTo * @param int|null $resizeWidth * @param int|null $resizeHeight * @param bool $keepRatio * @return mixed * @throws ImageUploadException */ public function saveNewFromUpload( UploadedFile $uploadedFile, string $type, int $uploadedTo = 0, int $resizeWidth = null, int $resizeHeight = null, bool $keepRatio = true ) { $imageName = $uploadedFile->getClientOriginalName(); $imageData = file_get_contents($uploadedFile->getRealPath()); if ($resizeWidth !== null || $resizeHeight !== null) { $imageData = $this->resizeImage($imageData, $resizeWidth, $resizeHeight, $keepRatio); } return $this->saveNew($imageName, $imageData, $type, $uploadedTo); } /** * Save a new image from a uri-encoded base64 string of data. * @param string $base64Uri * @param string $name * @param string $type * @param int $uploadedTo * @return Image * @throws ImageUploadException */ public function saveNewFromBase64Uri(string $base64Uri, string $name, string $type, $uploadedTo = 0) { $splitData = explode(';base64,', $base64Uri); if (count($splitData) < 2) { throw new ImageUploadException("Invalid base64 image data provided"); } $data = base64_decode($splitData[1]); return $this->saveNew($name, $data, $type, $uploadedTo); } /** * Gets an image from url and saves it to the database. * @param $url * @param string $type * @param bool|string $imageName * @return mixed * @throws \Exception */ private function saveNewFromUrl($url, $type, $imageName = false) { $imageName = $imageName ? $imageName : basename($url); try { $imageData = $this->http->fetch($url); } catch (HttpFetchException $exception) { throw new \Exception(trans('errors.cannot_get_image_from_url', ['url' => $url])); } return $this->saveNew($imageName, $imageData, $type); } /** * Saves a new image * @param string $imageName * @param string $imageData * @param string $type * @param int $uploadedTo * @return Image * @throws ImageUploadException */ private function saveNew($imageName, $imageData, $type, $uploadedTo = 0) { $storage = $this->getStorage($type); $secureUploads = setting('app-secure-images'); $imageName = str_replace(' ', '-', $imageName); $imagePath = '/uploads/images/' . $type . '/' . Date('Y-m') . '/'; while ($storage->exists($imagePath . $imageName)) { $imageName = Str::random(3) . $imageName; } $fullPath = $imagePath . $imageName; if ($secureUploads) { $fullPath = $imagePath . Str::random(16) . '-' . $imageName; } try { $storage->put($fullPath, $imageData); $storage->setVisibility($fullPath, 'public'); } catch (Exception $e) { throw new ImageUploadException(trans('errors.path_not_writable', ['filePath' => $fullPath])); } $imageDetails = [ 'name' => $imageName, 'path' => $fullPath, 'url' => $this->getPublicUrl($fullPath), 'type' => $type, 'uploaded_to' => $uploadedTo ]; if (user()->id !== 0) { $userId = user()->id; $imageDetails['created_by'] = $userId; $imageDetails['updated_by'] = $userId; } $image = $this->image->newInstance(); $image->forceFill($imageDetails)->save(); return $image; } /** * Checks if the image is a gif. Returns true if it is, else false. * @param Image $image * @return boolean */ protected function isGif(Image $image) { return strtolower(pathinfo($image->path, PATHINFO_EXTENSION)) === 'gif'; } /** * Get the thumbnail for an image. * If $keepRatio is true only the width will be used. * Checks the cache then storage to avoid creating / accessing the filesystem on every check. * @param Image $image * @param int $width * @param int $height * @param bool $keepRatio * @return string * @throws Exception * @throws ImageUploadException */ public function getThumbnail(Image $image, $width = 220, $height = 220, $keepRatio = false) { if ($keepRatio && $this->isGif($image)) { return $this->getPublicUrl($image->path); } $thumbDirName = '/' . ($keepRatio ? 'scaled-' : 'thumbs-') . $width . '-' . $height . '/'; $imagePath = $image->path; $thumbFilePath = dirname($imagePath) . $thumbDirName . basename($imagePath); if ($this->cache->has('images-' . $image->id . '-' . $thumbFilePath) && $this->cache->get('images-' . $thumbFilePath)) { return $this->getPublicUrl($thumbFilePath); } $storage = $this->getStorage($image->type); if ($storage->exists($thumbFilePath)) { return $this->getPublicUrl($thumbFilePath); } $thumbData = $this->resizeImage($storage->get($imagePath), $width, $height, $keepRatio); $storage->put($thumbFilePath, $thumbData); $storage->setVisibility($thumbFilePath, 'public'); $this->cache->put('images-' . $image->id . '-' . $thumbFilePath, $thumbFilePath, 60 * 60 * 72); return $this->getPublicUrl($thumbFilePath); } /** * Resize image data. * @param string $imageData * @param int $width * @param int $height * @param bool $keepRatio * @return string * @throws ImageUploadException */ protected function resizeImage(string $imageData, $width = 220, $height = null, bool $keepRatio = true) { try { $thumb = $this->imageTool->make($imageData); } catch (Exception $e) { if ($e instanceof \ErrorException || $e instanceof NotSupportedException) { throw new ImageUploadException(trans('errors.cannot_create_thumbs')); } throw $e; } if ($keepRatio) { $thumb->resize($width, $height, function ($constraint) { $constraint->aspectRatio(); $constraint->upsize(); }); } else { $thumb->fit($width, $height); } $thumbData = (string)$thumb->encode(); // Use original image data if we're keeping the ratio // and the resizing does not save any space. if ($keepRatio && strlen($thumbData) > strlen($imageData)) { return $imageData; } return $thumbData; } /** * Get the raw data content from an image. * @param Image $image * @return string * @throws \Illuminate\Contracts\Filesystem\FileNotFoundException */ public function getImageData(Image $image) { $imagePath = $image->path; $storage = $this->getStorage(); return $storage->get($imagePath); } /** * Destroy an image along with its revisions, thumbnails and remaining folders. * @param Image $image * @throws Exception */ public function destroy(Image $image) { $this->destroyImagesFromPath($image->path); $image->delete(); } /** * Destroys an image at the given path. * Searches for image thumbnails in addition to main provided path. */ protected function destroyImagesFromPath(string $path): bool { $storage = $this->getStorage(); $imageFolder = dirname($path); $imageFileName = basename($path); $allImages = collect($storage->allFiles($imageFolder)); // Delete image files $imagesToDelete = $allImages->filter(function ($imagePath) use ($imageFileName) { return basename($imagePath) === $imageFileName; }); $storage->delete($imagesToDelete->all()); // Cleanup of empty folders $foldersInvolved = array_merge([$imageFolder], $storage->directories($imageFolder)); foreach ($foldersInvolved as $directory) { if ($this->isFolderEmpty($directory)) { $storage->deleteDirectory($directory); } } return true; } /** * Save an avatar image from an external service. * @param \BookStack\Auth\User $user * @param int $size * @return Image * @throws Exception */ public function saveUserAvatar(User $user, $size = 500) { $avatarUrl = $this->getAvatarUrl(); $email = strtolower(trim($user->email)); $replacements = [ '${hash}' => md5($email), '${size}' => $size, '${email}' => urlencode($email), ]; $userAvatarUrl = strtr($avatarUrl, $replacements); $imageName = str_replace(' ', '-', $user->name . '-avatar.png'); $image = $this->saveNewFromUrl($userAvatarUrl, 'user', $imageName); $image->created_by = $user->id; $image->updated_by = $user->id; $image->uploaded_to = $user->id; $image->save(); return $image; } /** * Check if fetching external avatars is enabled. * @return bool */ public function avatarFetchEnabled() { $fetchUrl = $this->getAvatarUrl(); return is_string($fetchUrl) && strpos($fetchUrl, 'http') === 0; } /** * Get the URL to fetch avatars from. * @return string|mixed */ protected function getAvatarUrl() { $url = trim(config('services.avatar_url')); if (empty($url) && !config('services.disable_services')) { $url = 'https://www.gravatar.com/avatar/${hash}?s=${size}&d=identicon'; } return $url; } /** * Delete gallery and drawings that are not within HTML content of pages or page revisions. * Checks based off of only the image name. * Could be much improved to be more specific but kept it generic for now to be safe. * * Returns the path of the images that would be/have been deleted. * @param bool $checkRevisions * @param bool $dryRun * @param array $types * @return array */ public function deleteUnusedImages($checkRevisions = true, $dryRun = true, $types = ['gallery', 'drawio']) { $types = array_intersect($types, ['gallery', 'drawio']); $deletedPaths = []; $this->image->newQuery()->whereIn('type', $types) ->chunk(1000, function ($images) use ($types, $checkRevisions, &$deletedPaths, $dryRun) { foreach ($images as $image) { $searchQuery = '%' . basename($image->path) . '%'; $inPage = DB::table('pages') ->where('html', 'like', $searchQuery)->count() > 0; $inRevision = false; if ($checkRevisions) { $inRevision = DB::table('page_revisions') ->where('html', 'like', $searchQuery)->count() > 0; } if (!$inPage && !$inRevision) { $deletedPaths[] = $image->path; if (!$dryRun) { $this->destroy($image); } } } }); return $deletedPaths; } /** * Convert a image URI to a Base64 encoded string. * Attempts to find locally via set storage method first. * @param string $uri * @return null|string * @throws \Illuminate\Contracts\Filesystem\FileNotFoundException */ public function imageUriToBase64(string $uri) { $isLocal = strpos(trim($uri), 'http') !== 0; // Attempt to find local files even if url not absolute $base = url('/'); if (!$isLocal && strpos($uri, $base) === 0) { $isLocal = true; $uri = str_replace($base, '', $uri); } $imageData = null; if ($isLocal) { $uri = trim($uri, '/'); $storage = $this->getStorage(); if ($storage->exists($uri)) { $imageData = $storage->get($uri); } } else { try { $imageData = $this->http->fetch($uri); } catch (\Exception $e) { } } if ($imageData === null) { return null; } $extension = pathinfo($uri, PATHINFO_EXTENSION); if ($extension === 'svg') { $extension = 'svg+xml'; } return 'data:image/' . $extension . ';base64,' . base64_encode($imageData); } /** * Gets a public facing url for an image by checking relevant environment variables. * @param string $filePath * @return string */ private function getPublicUrl($filePath) { if ($this->storageUrl === null) { $storageUrl = config('filesystems.url'); // Get the standard public s3 url if s3 is set as storage type // Uses the nice, short URL if bucket name has no periods in otherwise the longer // region-based url will be used to prevent http issues. if ($storageUrl == false && config('filesystems.images') === 's3') { $storageDetails = config('filesystems.disks.s3'); if (strpos($storageDetails['bucket'], '.') === false) { $storageUrl = 'https://' . $storageDetails['bucket'] . '.s3.amazonaws.com'; } else { $storageUrl = 'https://s3-' . $storageDetails['region'] . '.amazonaws.com/' . $storageDetails['bucket']; } } $this->storageUrl = $storageUrl; } $basePath = ($this->storageUrl == false) ? url('/') : $this->storageUrl; return rtrim($basePath, '/') . $filePath; } }