217 lines
6.9 KiB
PHP
217 lines
6.9 KiB
PHP
<?php
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namespace App\AlbumSources;
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use App\BackblazeB2FileIdCache;
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use App\Photo;
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use App\Services\BackblazeB2Service;
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use App\Storage;
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use Guzzle\Http\EntityBody;
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use Illuminate\Support\Facades\Log;
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class BackblazeB2Source extends AlbumSourceBase implements IAlbumSource
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{
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const BUCKET_TYPE_AUTO = 0;
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const BUCKET_TYPE_PRIVATE = 1;
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const BUCKET_TYPE_PUBLIC = 2;
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/**
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* @var BackblazeB2Service
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*/
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private $backblaze;
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/**
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* Type of bucket which determines what type of URLs to generate to images.
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* @var integer
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*/
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private $bucketType;
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/**
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* Token used to download files from a private bucket.
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* @var string
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*/
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private $downloadToken;
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/**
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* Deletes an entire album's media contents.
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* @return void
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*/
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public function deleteAlbumContents()
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{
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// No need to do anything for the album container - once the files are gone, the virtual folder is also gone
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}
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/**
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* Deletes a thumbnail file for a photo.
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* @param Photo $photo Photo to delete the thumbnail from.
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* @param string $thumbnail Thumbnail to delete (or null to delete the original.)
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* @return void
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*/
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public function deleteThumbnail(Photo $photo, $thumbnail = null)
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{
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$pathOnStorage = $this->getPathToPhoto($photo, $thumbnail);
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// Create or update our cache record
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/** @var BackblazeB2FileIdCache $b2Cache */
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$b2Cache = BackblazeB2FileIdCache::where('storage_path', $pathOnStorage)->first();
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if (is_null($b2Cache))
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{
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// TODO: lookup the file on B2 to get the file ID
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Log::warning(sprintf('B2 file ID not found in cache: %s', $pathOnStorage));
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return;
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}
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$this->getClient()->deleteFile($b2Cache->b2_file_id, $pathOnStorage);
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$b2Cache->delete();
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}
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/**
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* Fetches the contents of a thumbnail for a photo.
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* @param Photo $photo Photo to fetch the thumbnail for.
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* @param string $thumbnail Thumbnail to fetch (or null to fetch the original.)
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* @return EntityBody
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*/
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public function fetchPhotoContent(Photo $photo, $thumbnail = null)
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{
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// Use the same URLs that the public would use to fetch the file
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$urlToPhoto = $this->getUrlToPhoto($photo, $thumbnail);
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$ch = curl_init($urlToPhoto);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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$fileContent = curl_exec($ch);
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return EntityBody::fromString($fileContent);
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}
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/**
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* Gets the name of this album source.
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* @return string
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*/
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public function getName()
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{
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return 'global.album_sources.backblaze_b2';
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}
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/**
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* Gets the absolute URL to the given photo file.
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* @param Photo $photo Photo to get the URL to.
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* @param string $thumbnail Thumbnail to get the image to.
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* @return string
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*/
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public function getUrlToPhoto(Photo $photo, $thumbnail = null)
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{
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$client = $this->getClient();
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$storagePathToFile = $this->getPathToPhoto($photo, $thumbnail);
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/*
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* From https://www.backblaze.com/b2/docs/b2_download_file_by_name.html:
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* The base URL to use comes from the b2_authorize_account call, and looks something like
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* https://f345.backblazeb2.com. The "f" in the URL stands for "file", and the number is the cluster
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* number containing your account. To this base, you add "file/", your bucket name, a "/", and then the
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* name of the file. The file name may itself include more "/" characters.
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*/
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$fileDownloadUrl = sprintf('%s/file/%s/%s', $client->getDownloadUrl(), $this->configuration->container_name, $storagePathToFile);
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switch ($this->bucketType)
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{
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case self::BUCKET_TYPE_PRIVATE:
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// TODO: use the B2 b2_download_file_by_id method so filenames are harder to guess
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if (is_null($this->downloadToken))
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{
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$this->downloadToken = $client->getDownloadAuthToken();
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}
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return sprintf('%s?Authorization=%s', $fileDownloadUrl, $this->downloadToken);
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case self::BUCKET_TYPE_PUBLIC:
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return $fileDownloadUrl;
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}
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}
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/**
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* Saves a generated thumbnail to its permanent location.
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* @param Photo $photo Photo the image relates to.
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* @param string $tempFilename Filename containing the image.
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* @param string $thumbnail Name of the thumbnail (or null for the original.)
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* @return mixed
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*/
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public function saveThumbnail(Photo $photo, $tempFilename, $thumbnail = null)
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{
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$pathOnStorage = $this->getPathToPhoto($photo, $thumbnail);
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// Upload the file to B2
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$b2FileID = $this->getClient()->uploadFile($tempFilename, $pathOnStorage);
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// Create or update our cache record
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$b2Cache = BackblazeB2FileIdCache::where('storage_path', $pathOnStorage)->first();
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if (is_null($b2Cache))
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{
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$b2Cache = new BackblazeB2FileIdCache([
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'photo_id' => $photo->id,
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'storage_path' => $pathOnStorage,
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'b2_file_id' => $b2FileID
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]);
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}
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else
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{
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$b2Cache->b2_file_id = $b2FileID;
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}
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$b2Cache->save();
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}
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public function setConfiguration(Storage $configuration)
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{
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parent::setConfiguration($configuration);
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}
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private function getClient()
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{
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if (is_null($this->backblaze))
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{
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$this->backblaze = new BackblazeB2Service();
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$this->backblaze->setCredentials(decrypt($this->configuration->access_key), decrypt($this->configuration->secret_key));
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$this->backblaze->authorizeAccount();
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$this->backblaze->setBucketName($this->configuration->container_name);
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if (intval($this->configuration->b2_bucket_type) == self::BUCKET_TYPE_AUTO)
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{
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/* Auto-detect the type of bucket in use on B2 */
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switch ($this->backblaze->getBucketType())
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{
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case 'allPrivate':
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$this->configuration->b2_bucket_type = self::BUCKET_TYPE_PRIVATE;
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break;
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case 'allPublic':
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$this->configuration->b2_bucket_type = self::BUCKET_TYPE_PUBLIC;
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break;
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}
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$this->configuration->save();
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}
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// Set the bucket type
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$this->bucketType = $this->configuration->b2_bucket_type;
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}
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return $this->backblaze;
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}
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private function getOriginalsFolder()
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{
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return '_originals';
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}
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private function getPathToPhoto(Photo $photo, $thumbnail = null)
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{
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return sprintf(
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'%s/%s/%s',
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$this->album->url_alias,
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is_null($thumbnail) ? $this->getOriginalsFolder() : $thumbnail,
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$photo->storage_file_name
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);
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}
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} |