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1 <?php
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2
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3 namespace Drupal\Core\Condition;
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4
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5 use Drupal\Component\Plugin\CategorizingPluginManagerInterface;
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6 use Drupal\Core\Cache\CacheBackendInterface;
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7 use Drupal\Core\Executable\ExecutableManagerInterface;
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8 use Drupal\Core\Executable\ExecutableInterface;
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9 use Drupal\Core\Extension\ModuleHandlerInterface;
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10 use Drupal\Core\Plugin\CategorizingPluginManagerTrait;
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11 use Drupal\Core\Plugin\DefaultPluginManager;
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12 use Drupal\Core\Plugin\FilteredPluginManagerInterface;
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13 use Drupal\Core\Plugin\FilteredPluginManagerTrait;
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14
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15 /**
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16 * A plugin manager for condition plugins.
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17 *
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18 * @see \Drupal\Core\Condition\Annotation\Condition
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19 * @see \Drupal\Core\Condition\ConditionInterface
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20 * @see \Drupal\Core\Condition\ConditionPluginBase
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21 *
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22 * @ingroup plugin_api
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23 */
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24 class ConditionManager extends DefaultPluginManager implements ExecutableManagerInterface, CategorizingPluginManagerInterface, FilteredPluginManagerInterface {
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25
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26 use CategorizingPluginManagerTrait;
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27 use FilteredPluginManagerTrait;
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28
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29 /**
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30 * Constructs a ConditionManager object.
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31 *
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32 * @param \Traversable $namespaces
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33 * An object that implements \Traversable which contains the root paths
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34 * keyed by the corresponding namespace to look for plugin implementations.
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35 * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
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36 * Cache backend instance to use.
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37 * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
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38 * The module handler to invoke the alter hook with.
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39 */
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40 public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler) {
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41 $this->alterInfo('condition_info');
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42 $this->setCacheBackend($cache_backend, 'condition_plugins');
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43
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44 parent::__construct('Plugin/Condition', $namespaces, $module_handler, 'Drupal\Core\Condition\ConditionInterface', 'Drupal\Core\Condition\Annotation\Condition');
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45 }
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46
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47 /**
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48 * {@inheritdoc}
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49 */
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50 protected function getType() {
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51 return 'condition';
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52 }
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53
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54 /**
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55 * {@inheritdoc}
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56 */
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57 public function createInstance($plugin_id, array $configuration = []) {
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58 $plugin = $this->getFactory()->createInstance($plugin_id, $configuration);
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59
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60 // If we receive any context values via config set it into the plugin.
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61 if (!empty($configuration['context'])) {
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62 foreach ($configuration['context'] as $name => $context) {
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63 $plugin->setContextValue($name, $context);
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64 }
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65 }
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66
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67 return $plugin->setExecutableManager($this);
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68 }
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69
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70 /**
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71 * {@inheritdoc}
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72 */
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73 public function execute(ExecutableInterface $condition) {
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74 $result = $condition->evaluate();
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75 return $condition->isNegated() ? !$result : $result;
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76 }
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77
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78 }
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