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<?php |
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/** |
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* BEdita, API-first content management framework |
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* Copyright 2018 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 App\Controller\Component; |
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use BEdita\SDK\BEditaClientException; |
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use BEdita\WebTools\ApiClientProvider; |
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use Cake\Cache\Cache; |
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use Cake\Controller\Component; |
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use Cake\Core\Configure; |
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use Cake\Utility\Hash; |
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use Psr\Log\LogLevel; |
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/** |
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* Handles JSON Schema of objects and resources. |
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* |
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* @property \Cake\Controller\Component\FlashComponent $Flash |
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*/ |
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class SchemaComponent extends Component |
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{ |
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/** |
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* {@inheritDoc} |
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*/ |
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public $components = ['Flash']; |
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/** |
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* Cache config name for type schemas. |
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* |
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* @var string |
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*/ |
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const CACHE_CONFIG = '_schema_types_'; |
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/** |
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* {@inheritDoc} |
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*/ |
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protected $_defaultConfig = [ |
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'type' => null, // resource or object type name |
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'internalSchema' => false, // use internal schema |
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]; |
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/** |
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* Create multi project cache key. |
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* |
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* @param string $name Cache item name. |
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* @return string |
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*/ |
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protected function cacheKey(string $name): string |
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{ |
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$apiSignature = md5(ApiClientProvider::getApiClient()->getApiBaseUrl()); |
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return sprintf('%s_%s', $name, $apiSignature); |
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} |
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/** |
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* Read type JSON Schema from API using internal cache. |
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* |
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* @param string|null $type Type to get schema for. By default, configured type is used. |
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* @param string|null $revision Schema revision. |
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* @return array|bool JSON Schema. |
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*/ |
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public function getSchema(string $type = null, string $revision = null) |
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{ |
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if ($type === null) { |
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$type = $this->getConfig('type'); |
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} |
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if ($this->getConfig('internalSchema')) { |
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return $this->loadInternalSchema($type); |
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} |
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$schema = $this->loadWithRevision($type, $revision); |
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if ($schema !== false) { |
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return $schema; |
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} |
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try { |
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$schema = Cache::remember( |
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$this->cacheKey($type), |
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function () use ($type) { |
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return $this->fetchSchema($type); |
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}, |
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self::CACHE_CONFIG |
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); |
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} catch (BEditaClientException $e) { |
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// Something bad happened. Booleans **ARE** valid JSON Schemas: returning `false` instead. |
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// The exception is being caught _outside_ of `Cache::remember()` to avoid caching the fallback. |
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$this->log($e, LogLevel::ERROR); |
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return false; |
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} |
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return $schema; |
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} |
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/** |
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* Load schema from cache with revision check. |
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* If cached revision don't match cache is removed. |
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* |
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* @param string $type Type to get schema for. By default, configured type is used. |
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* @param string $revision Schema revision. |
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* @return array|bool Cached schema if revision match, otherwise false |
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*/ |
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protected function loadWithRevision(string $type, string $revision = null) |
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{ |
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$key = $this->cacheKey($type); |
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$schema = Cache::read($key, self::CACHE_CONFIG); |
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if ($schema === false) { |
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return false; |
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} |
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$cacheRevision = empty($schema['revision']) ? null : $schema['revision']; |
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if ($cacheRevision === $revision) { |
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return $schema; |
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} |
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// remove from cache if revision don't match |
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Cache::delete($key, self::CACHE_CONFIG); |
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return false; |
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} |
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/** |
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* Fetch JSON Schema via API. |
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* |
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* @param string $type Type to get schema for. |
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* @return array|bool JSON Schema. |
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*/ |
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protected function fetchSchema(string $type) |
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{ |
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return ApiClientProvider::getApiClient()->schema($type); |
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} |
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/** |
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* Load internal schema properties from configuration. |
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* |
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* @param string $type Resource type name |
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* @return array |
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*/ |
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protected function loadInternalSchema(string $type): array |
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{ |
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Configure::load('schema_properties'); |
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$properties = (array)Configure::read(sprintf('SchemaProperties.%s', $type), []); |
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return compact('properties'); |
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} |
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/** |
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* Read relations schema from API using internal cache. |
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* |
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* @return array Relations schema. |
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*/ |
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public function getRelationsSchema() |
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{ |
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try { |
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$schema = (array)Cache::remember( |
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$this->cacheKey('relations'), |
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function () { |
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return $this->fetchRelationData(); |
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}, |
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self::CACHE_CONFIG |
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); |
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} catch (BEditaClientException $e) { |
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// The exception is being caught _outside_ of `Cache::remember()` to avoid caching the fallback. |
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$this->log($e, LogLevel::ERROR); |
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$this->Flash->error($e->getMessage(), ['params' => $e]); |
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$schema = []; |
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} |
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return $schema; |
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} |
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/** |
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* Fetch relations schema via API. |
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* |
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* @return array Relations schema. |
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*/ |
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protected function fetchRelationData() |
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{ |
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$query = [ |
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'include' => 'left_object_types,right_object_types', |
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'page_size' => 100, |
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]; |
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$response = ApiClientProvider::getApiClient()->get('/model/relations', $query); |
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$relations = []; |
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// retrieve relation right and left object types |
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$typeNames = Hash::combine((array)$response, 'included.{n}.id', 'included.{n}.attributes.name'); |
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foreach ($response['data'] as $res) { |
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$leftTypes = (array)Hash::extract($res, 'relationships.left_object_types.data.{n}.id'); |
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$rightTypes = (array)Hash::extract($res, 'relationships.right_object_types.data.{n}.id'); |
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$res['left'] = array_values(array_intersect_key($typeNames, array_flip($leftTypes))); |
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$res['right'] = array_values(array_intersect_key($typeNames, array_flip($rightTypes))); |
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unset($res['relationships'], $res['links']); |
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$relations[$res['attributes']['name']] = $res; |
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$relations[$res['attributes']['inverse_name']] = $res; |
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} |
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Configure::load('relations'); |
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return $relations + Configure::read('DefaultRelations'); |
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} |
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} |
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