Civi/API/Provider/WrappingProvider.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | CiviCRM version 5                                                  |
   5  +--------------------------------------------------------------------+
   6  | Copyright CiviCRM LLC (c) 2004-2018                                |
   7  +--------------------------------------------------------------------+
   8  | This file is a part of CiviCRM.                                    |
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  10  | CiviCRM is free software; you can copy, modify, and distribute it  |
  11  | under the terms of the GNU Affero General Public License           |
  12  | Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
  13  |                                                                    |
  14  | CiviCRM is distributed in the hope that it will be useful, but     |
  15  | WITHOUT ANY WARRANTY; without even the implied warranty of         |
  16  | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               |
  17  | See the GNU Affero General Public License for more details.        |
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  19  | You should have received a copy of the GNU Affero General Public   |
  20  | License and the CiviCRM Licensing Exception along                  |
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  22  | at info[AT]civicrm[DOT]org. If you have questions about the        |
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  24  | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
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  26  */
  27
  28 namespace Civi\API\Provider;
  29
  30 use Civi\API\Events;
  31 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  32
  33 /**
  34  * A wrapping provider overrides an existing API. It has discretion to pass-through
  35  * to the original API (0 or many times) or to substitute with entirely different
  36  * behavior.
  37  *
  38  * The WrappingProvider does yield any metadata of its own. It's primarily
  39  * intended for dynamically decorating an existing API.
  40  */
  41 class WrappingProvider implements ProviderInterface {
  42
  43   /**
  44    * @var callable
  45    *   Function($apiRequest, callable $continue)
  46    */
  47   protected $callback;
  48
  49   /**
  50    * @var ProviderInterface
  51    */
  52   protected $original;
  53
  54   /**
  55    * WrappingProvider constructor.
  56    * @param callable $callback
  57    * @param \Civi\API\Provider\ProviderInterface $original
  58    */
  59   public function __construct($callback, \Civi\API\Provider\ProviderInterface $original) {
  60     $this->callback = $callback;
  61     $this->original = $original;
  62   }
  63
  64   public function invoke($apiRequest) {
  65     // $continue = function($a) { return $this->original->invoke($a); };
  66     $continue = [$this->original, 'invoke'];
  67     return call_user_func($this->callback, $apiRequest, $continue);
  68   }
  69
  70   public function getEntityNames($version) {
  71     // return $version == $this->version ? [$this->entity] : [];
  72     throw new \API_Exception("Not support: WrappingProvider::getEntityNames()");
  73   }
  74
  75   public function getActionNames($version, $entity) {
  76     // return $version == $this->version && $this->entity == $entity ? [$this->action] : [];
  77     throw new \API_Exception("Not support: WrappingProvider::getActionNames()");
  78   }
  79
  80 }