www.aleph1.co.uk Git - yaffs-website/blob - web/modules/contrib/libraries/src/Plugin/libraries/Locator/ChainLocator.php

   1 <?php
   2
   3 namespace Drupal\libraries\Plugin\libraries\Locator;
   4
   5 use Drupal\libraries\ExternalLibrary\Local\LocalLibraryInterface;
   6 use Drupal\libraries\ExternalLibrary\Local\LocatorInterface;
   7
   8 /**
   9  * Provides a locator utilizing a chain of other individual locators.
  10  *
  11  * @Locator("chain")
  12  *
  13  * @see \Drupal\libraries\ExternalLibrary\Local\LocatorInterface
  14  */
  15 class ChainLocator implements LocatorInterface {
  16
  17   /**
  18    * The locators to check.
  19    *
  20    * @var \Drupal\libraries\ExternalLibrary\Local\LocatorInterface[]
  21    */
  22   protected $locators = [];
  23
  24   /**
  25    * Add a locator to the chain.
  26    *
  27    * @param \Drupal\libraries\ExternalLibrary\Local\LocatorInterface $locator
  28    *   A locator to add to the chain.
  29    */
  30   public function addLocator(LocatorInterface $locator) {
  31     $this->locators[] = $locator;
  32     return $this;
  33   }
  34
  35   /**
  36    * Locates a library.
  37    *
  38    * @param \Drupal\libraries\ExternalLibrary\Local\LocalLibraryInterface $library
  39    *   The library to locate.
  40    *
  41    * @see \Drupal\libraries\ExternalLibrary\Local\LocatorInterface::locate()
  42    */
  43   public function locate(LocalLibraryInterface $library) {
  44     foreach ($this->locators as $locator) {
  45       $locator->locate($library);
  46       if ($library->isInstalled()) {
  47         return;
  48       }
  49     }
  50     $library->setUninstalled();
  51   }
  52
  53 }