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<?php |
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declare(strict_types=1); |
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/** |
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* BEdita, API-first content management framework |
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* Copyright 2019 ChannelWeb Srl, Chialab Srl |
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* |
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* This file is part of BEdita: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published |
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* by the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* See LICENSE.LGPL or <http://gnu.org/licenses/lgpl-3.0.html> for more details. |
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*/ |
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namespace BEdita\WebTools\View\Helper; |
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use BEdita\WebTools\ApiClientProvider; |
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use Cake\Cache\Cache; |
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use Cake\Log\LogTrait; |
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use Cake\Utility\Hash; |
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use Cake\View\Helper; |
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/** |
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* Helper to obtain thumbnail url |
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*/ |
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class ThumbHelper extends Helper |
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{ |
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use LogTrait; |
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/** |
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* Default config for this helper. |
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* |
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* @var array |
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*/ |
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protected $_defaultConfig = [ |
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'cache' => '_thumbs_', |
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]; |
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/** |
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* @var int Thumb not available |
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*/ |
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public const NOT_AVAILABLE = -10; |
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/** |
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* @var int Thumb not ready |
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*/ |
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public const NOT_READY = -20; |
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/** |
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* @var int Thumb not acceptable |
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*/ |
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public const NOT_ACCEPTABLE = -30; |
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/** |
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* @var int Thumb has no url |
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*/ |
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public const NO_URL = -40; |
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/** |
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* @var int Thumb is OK |
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*/ |
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public const OK = 1; |
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/** |
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* Use 'default' as fallback if no cache configuration is found. |
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* |
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* @param array $config The configuration settings provided to this helper. |
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* @return void |
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*/ |
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public function initialize(array $config): void |
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{ |
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parent::initialize($config); |
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if (!empty($config['cache'])) { |
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$this->setConfig('cache', $config['cache']); |
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} |
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$cacheCfg = $this->getConfig('cache'); |
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$cfg = Cache::getConfig($cacheCfg); |
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if ($cfg === null) { |
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$this->setConfig('cache', 'default'); |
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} |
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} |
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/** |
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* Verify status of image thumb. |
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* Return int representing status. |
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* Possible values: |
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* |
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* NOT_AVAILABLE: something went wrong during api call |
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* NOT_READY: thumb is available, but not ready |
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* NOT_ACCEPTABLE: image is not acceptable, api won't create thumb |
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* NO_URL: url not present in api response |
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* OK: thumb available, ready and with a proper url |
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* |
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* @param int|string $imageId The image ID |
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* @param array|null $options The thumbs options |
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* @param string|null $url The thumb url to populate when static::OK |
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* @return int|null |
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*/ |
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public function status($imageId, ?array $options = ['preset' => 'default'], &$url = ''): ?int |
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{ |
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if (empty($imageId) && empty($options['ids'])) { |
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return static::NOT_ACCEPTABLE; |
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} |
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try { |
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$apiClient = ApiClientProvider::getApiClient(); |
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$response = $apiClient->thumbs($imageId, $options); |
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if (empty($response['meta']['thumbnails'][0])) { |
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return static::NOT_AVAILABLE; |
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} |
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$thumb = $response['meta']['thumbnails'][0]; |
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// check thumb is ready |
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if (!$this->isReady($thumb)) { |
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return static::NOT_READY; |
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} |
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// check thumb is acceptable |
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if (!$this->isAcceptable($thumb)) { |
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return static::NOT_ACCEPTABLE; |
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} |
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// check thumb has url |
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if (!$this->hasUrl($thumb)) { |
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return static::NO_URL; |
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} |
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$url = $thumb['url']; |
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} catch (\Exception $e) { |
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$this->log($e->getMessage(), 'error'); |
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return static::NOT_AVAILABLE; |
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} |
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return static::OK; |
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} |
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/** |
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* Obtain thumbnail using API thumbs. |
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* |
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* @param int $imageId The image ID. |
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* @param array|null $options The thumbs options. |
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* @return string|int The url if available, the status code otherwise (see Thumb constants). |
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*/ |
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public function url($imageId, $options) |
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{ |
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$url = null; |
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$status = $this->status($imageId, $options, $url); |
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if ($status === static::OK) { |
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return $url; |
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} |
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return $status; |
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} |
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/** |
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* Verify if thumb is acceptable |
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* |
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* @param array $thumb The thumbnail data |
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* @return bool the acceptable flag |
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*/ |
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private function isAcceptable($thumb = []): bool |
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{ |
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if (isset($thumb['acceptable']) && $thumb['acceptable'] === false) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Verify if thumb is ready |
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* |
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* @param array $thumb The thumbnail data |
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* @return bool the ready flag |
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*/ |
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private function isReady($thumb = []): bool |
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{ |
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if (!empty($thumb['ready']) && $thumb['ready'] === true) { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Verify if thumb has url |
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* |
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* @param array $thumb The thumbnail data |
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* @return bool the url availability |
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*/ |
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private function hasUrl($thumb = []): bool |
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{ |
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if (!empty($thumb['url'])) { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Retrieve thumb URL using cache. |
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* Silently fail with log if no image 'id' is found in array. |
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* |
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* @param array $image Image object array containing at least `id` |
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* @param string $options Thumb options |
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* @return string |
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*/ |
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public function getUrl(array $image, array $options = []): string |
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{ |
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if (empty($image['id'])) { |
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$this->log(sprintf('Missing image ID - %s', json_encode($image)), 'warning'); |
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return ''; |
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} |
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$thumbHash = md5((string)Hash::get($image, 'meta.media_url') . json_encode($options)); |
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$key = sprintf('%d_%s', $image['id'], $thumbHash); |
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return (string)Cache::remember( |
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$key, |
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function () use ($image, $options) { |
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return $this->url($image['id'], $options); |
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}, |
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$this->getConfig('cache') |
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); |
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} |
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} |
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bedita /
web-tools
