diff core/modules/views/src/EventSubscriber/ViewsEntitySchemaSubscriber.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/views/src/EventSubscriber/ViewsEntitySchemaSubscriber.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,380 @@
+<?php
+
+namespace Drupal\views\EventSubscriber;
+
+use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Entity\EntityTypeEventSubscriberTrait;
+use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Entity\EntityTypeListenerInterface;
+use Drupal\Core\Entity\Sql\SqlContentEntityStorage;
+use Drupal\views\Views;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+/**
+ * Reacts to changes on entity types to update all views entities.
+ */
+class ViewsEntitySchemaSubscriber implements EntityTypeListenerInterface, EventSubscriberInterface {
+
+  use EntityTypeEventSubscriberTrait;
+
+  /**
+   * Indicates that a base table got renamed.
+   */
+  const BASE_TABLE_RENAME = 0;
+
+  /**
+   * Indicates that a data table got renamed.
+   */
+  const DATA_TABLE_RENAME = 1;
+
+  /**
+   * Indicates that a data table got added.
+   */
+  const DATA_TABLE_ADDITION = 2;
+
+  /**
+   * Indicates that a data table got removed.
+   */
+  const DATA_TABLE_REMOVAL = 3;
+
+  /**
+   * Indicates that a revision table got renamed.
+   */
+  const REVISION_TABLE_RENAME = 4;
+
+  /**
+   * Indicates that a revision table got added.
+   */
+  const REVISION_TABLE_ADDITION = 5;
+
+  /**
+   * Indicates that a revision table got removed.
+   */
+  const REVISION_TABLE_REMOVAL = 6;
+
+  /**
+   * Indicates that a revision data table got renamed.
+   */
+  const REVISION_DATA_TABLE_RENAME = 7;
+
+  /**
+   * Indicates that a revision data table got added.
+   */
+  const REVISION_DATA_TABLE_ADDITION = 8;
+
+  /**
+   * Indicates that a revision data table got removed.
+   */
+  const REVISION_DATA_TABLE_REMOVAL = 9;
+
+  /**
+   * The entity manager.
+   *
+   * @var \Drupal\Core\Entity\EntityManagerInterface
+   */
+  protected $entityManager;
+
+  /**
+   * Constructs a ViewsEntitySchemaSubscriber.
+   *
+   * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
+   *   The entity manager.
+   */
+  public function __construct(EntityManagerInterface $entity_manager) {
+    $this->entityManager = $entity_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getSubscribedEvents() {
+    return static::getEntityTypeEvents();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function onEntityTypeUpdate(EntityTypeInterface $entity_type, EntityTypeInterface $original) {
+    $changes = [];
+
+    // We implement a specific logic for table updates, which is bound to the
+    // default sql content entity storage.
+    if (!$this->entityManager->getStorage($entity_type->id()) instanceof SqlContentEntityStorage) {
+      return;
+    }
+
+    if ($entity_type->getBaseTable() != $original->getBaseTable()) {
+      $changes[] = static::BASE_TABLE_RENAME;
+    }
+
+    $revision_add = $entity_type->isRevisionable() && !$original->isRevisionable();
+    $revision_remove = !$entity_type->isRevisionable() && $original->isRevisionable();
+    $translation_add = $entity_type->isTranslatable() && !$original->isTranslatable();
+    $translation_remove = !$entity_type->isTranslatable() && $original->isTranslatable();
+
+    if ($revision_add) {
+      $changes[] = static::REVISION_TABLE_ADDITION;
+    }
+    elseif ($revision_remove) {
+      $changes[] = static::REVISION_TABLE_REMOVAL;
+    }
+    elseif ($entity_type->isRevisionable() && $entity_type->getRevisionTable() != $original->getRevisionTable()) {
+      $changes[] = static::REVISION_TABLE_RENAME;
+    }
+
+    if ($translation_add) {
+      $changes[] = static::DATA_TABLE_ADDITION;
+    }
+    elseif ($translation_remove) {
+      $changes[] = static::DATA_TABLE_REMOVAL;
+    }
+    elseif ($entity_type->isTranslatable() && $entity_type->getDataTable() != $original->getDataTable()) {
+      $changes[] = static::DATA_TABLE_RENAME;
+    }
+
+    if ($entity_type->isRevisionable() && $entity_type->isTranslatable()) {
+      if ($revision_add || $translation_add) {
+        $changes[] = static::REVISION_DATA_TABLE_ADDITION;
+      }
+      elseif ($entity_type->getRevisionDataTable() != $original->getRevisionDataTable()) {
+        $changes[] = static::REVISION_DATA_TABLE_RENAME;
+      }
+    }
+    elseif ($original->isRevisionable() && $original->isTranslatable() && ($revision_remove || $translation_remove)) {
+      $changes[] = static::REVISION_DATA_TABLE_REMOVAL;
+    }
+
+    // Stop here if no changes are needed.
+    if (empty($changes)) {
+      return;
+    }
+
+    /** @var \Drupal\views\Entity\View[] $all_views */
+    $all_views = $this->entityManager->getStorage('view')->loadMultiple(NULL);
+
+    foreach ($changes as $change) {
+      switch ($change) {
+        case static::BASE_TABLE_RENAME:
+          $this->baseTableRename($all_views, $entity_type->id(), $original->getBaseTable(), $entity_type->getBaseTable());
+          break;
+        case static::DATA_TABLE_RENAME:
+          $this->dataTableRename($all_views, $entity_type->id(), $original->getDataTable(), $entity_type->getDataTable());
+          break;
+        case static::DATA_TABLE_ADDITION:
+          $this->dataTableAddition($all_views, $entity_type, $entity_type->getDataTable(), $entity_type->getBaseTable());
+          break;
+        case static::DATA_TABLE_REMOVAL:
+          $this->dataTableRemoval($all_views, $entity_type->id(), $original->getDataTable(), $entity_type->getBaseTable());
+          break;
+        case static::REVISION_TABLE_RENAME:
+          $this->baseTableRename($all_views, $entity_type->id(), $original->getRevisionTable(), $entity_type->getRevisionTable());
+          break;
+        case static::REVISION_TABLE_ADDITION:
+          // If we add revision support we don't have to do anything.
+          break;
+        case static::REVISION_TABLE_REMOVAL:
+          $this->revisionRemoval($all_views, $original);
+          break;
+        case static::REVISION_DATA_TABLE_RENAME:
+          $this->dataTableRename($all_views, $entity_type->id(), $original->getRevisionDataTable(), $entity_type->getRevisionDataTable());
+          break;
+        case static::REVISION_DATA_TABLE_ADDITION:
+          $this->dataTableAddition($all_views, $entity_type, $entity_type->getRevisionDataTable(), $entity_type->getRevisionTable());
+          break;
+        case static::REVISION_DATA_TABLE_REMOVAL:
+          $this->dataTableRemoval($all_views, $entity_type->id(), $original->getRevisionDataTable(), $entity_type->getRevisionTable());
+          break;
+      }
+    }
+
+    foreach ($all_views as $view) {
+      // All changes done to the views here can be trusted and this might be
+      // called during updates, when it is not safe to rely on configuration
+      // containing valid schema. Trust the data and disable schema validation
+      // and casting.
+      $view->trustData()->save();
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function onEntityTypeDelete(EntityTypeInterface $entity_type) {
+    $tables = [
+      $entity_type->getBaseTable(),
+      $entity_type->getDataTable(),
+      $entity_type->getRevisionTable(),
+      $entity_type->getRevisionDataTable(),
+    ];
+
+    $all_views = $this->entityManager->getStorage('view')->loadMultiple(NULL);
+    /** @var \Drupal\views\Entity\View $view */
+    foreach ($all_views as $id => $view) {
+
+      // First check just the base table.
+      if (in_array($view->get('base_table'), $tables)) {
+        $view->disable();
+        $view->save();
+      }
+    }
+  }
+
+  /**
+   * Applies a callable onto all handlers of all passed in views.
+   *
+   * @param \Drupal\views\Entity\View[] $all_views
+   *   All views entities.
+   * @param callable $process
+   *   A callable which retrieves a handler config array.
+   */
+  protected function processHandlers(array $all_views, callable $process) {
+    foreach ($all_views as $view) {
+      foreach (array_keys($view->get('display')) as $display_id) {
+        $display = &$view->getDisplay($display_id);
+        foreach (Views::getHandlerTypes() as $handler_type) {
+          $handler_type = $handler_type['plural'];
+          if (!isset($display['display_options'][$handler_type])) {
+            continue;
+          }
+          foreach ($display['display_options'][$handler_type] as $id => &$handler_config) {
+            $process($handler_config);
+            if ($handler_config === NULL) {
+              unset($display['display_options'][$handler_type][$id]);
+            }
+          }
+        }
+      }
+    }
+  }
+
+  /**
+   * Updates views if a base table is renamed.
+   *
+   * @param \Drupal\views\Entity\View[] $all_views
+   *   All views.
+   * @param string $entity_type_id
+   *   The entity type ID.
+   * @param string $old_base_table
+   *   The old base table name.
+   * @param string $new_base_table
+   *   The new base table name.
+   */
+  protected function baseTableRename($all_views, $entity_type_id, $old_base_table, $new_base_table) {
+    foreach ($all_views as $view) {
+      if ($view->get('base_table') == $old_base_table) {
+        $view->set('base_table', $new_base_table);
+      }
+    }
+
+    $this->processHandlers($all_views, function (array &$handler_config) use ($entity_type_id, $old_base_table, $new_base_table) {
+      if (isset($handler_config['entity_type']) && $handler_config['entity_type'] == $entity_type_id && $handler_config['table'] == $old_base_table) {
+        $handler_config['table'] = $new_base_table;
+      }
+    });
+  }
+
+  /**
+   * Updates views if a data table is renamed.
+   *
+   * @param \Drupal\views\Entity\View[] $all_views
+   *   All views.
+   * @param string $entity_type_id
+   *   The entity type ID.
+   * @param string $old_data_table
+   *   The old data table name.
+   * @param string $new_data_table
+   *   The new data table name.
+   */
+  protected function dataTableRename($all_views, $entity_type_id, $old_data_table, $new_data_table) {
+    foreach ($all_views as $view) {
+      if ($view->get('base_table') == $old_data_table) {
+        $view->set('base_table', $new_data_table);
+      }
+    }
+
+    $this->processHandlers($all_views, function (array &$handler_config) use ($entity_type_id, $old_data_table, $new_data_table) {
+      if (isset($handler_config['entity_type']) && $handler_config['entity_type'] == $entity_type_id && $handler_config['table'] == $old_data_table) {
+        $handler_config['table'] = $new_data_table;
+      }
+    });
+  }
+
+  /**
+   * Updates views if a data table is added.
+   *
+   * @param \Drupal\views\Entity\View[] $all_views
+   *   All views.
+   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
+   *   The entity type.
+   * @param string $new_data_table
+   *   The new data table.
+   * @param string $base_table
+   *   The base table.
+   */
+  protected function dataTableAddition($all_views, EntityTypeInterface $entity_type, $new_data_table, $base_table) {
+    /** @var \Drupal\Core\Entity\Sql\SqlContentEntityStorage $storage */
+    $entity_type_id = $entity_type->id();
+    $storage = $this->entityManager->getStorage($entity_type_id);
+    $storage->setEntityType($entity_type);
+    $table_mapping = $storage->getTableMapping();
+    $data_table_fields = $table_mapping->getFieldNames($new_data_table);
+    $base_table_fields = $table_mapping->getFieldNames($base_table);
+
+    $data_table = $new_data_table;
+
+    $this->processHandlers($all_views, function (array &$handler_config) use ($entity_type_id, $base_table, $data_table, $base_table_fields, $data_table_fields) {
+      if (isset($handler_config['entity_type']) && isset($handler_config['entity_field']) && $handler_config['entity_type'] == $entity_type_id) {
+        // Move all fields which just exists on the data table.
+        if ($handler_config['table'] == $base_table && in_array($handler_config['entity_field'], $data_table_fields) && !in_array($handler_config['entity_field'], $base_table_fields)) {
+          $handler_config['table'] = $data_table;
+        }
+      }
+    });
+  }
+
+  /**
+   * Updates views if a data table is removed.
+   *
+   * @param \Drupal\views\Entity\View[] $all_views
+   *   All views.
+   * @param string $entity_type_id
+   *   The entity type ID.
+   * @param string $old_data_table
+   *   The name of the previous existing data table.
+   * @param string $base_table
+   *   The name of the base table.
+   */
+  protected function dataTableRemoval($all_views, $entity_type_id, $old_data_table, $base_table) {
+    // We move back the data table back to the base table.
+    $this->processHandlers($all_views, function (array &$handler_config) use ($entity_type_id, $old_data_table, $base_table) {
+      if (isset($handler_config['entity_type']) && $handler_config['entity_type'] == $entity_type_id) {
+        if ($handler_config['table'] == $old_data_table) {
+          $handler_config['table'] = $base_table;
+        }
+      }
+    });
+  }
+
+  /**
+   * Updates views if revision support is removed
+   *
+   * @param \Drupal\views\Entity\View[] $all_views
+   *   All views.
+   * @param \Drupal\Core\Entity\EntityTypeInterface $original
+   *   The origin entity type.
+   */
+  protected function revisionRemoval($all_views, EntityTypeInterface $original) {
+    $revision_base_table = $original->getRevisionTable();
+    $revision_data_table = $original->getRevisionDataTable();
+
+    foreach ($all_views as $view) {
+      if (in_array($view->get('base_table'), [$revision_base_table, $revision_data_table])) {
+        // Let's disable the views as we no longer support revisions.
+        $view->setStatus(FALSE);
+      }
+
+      // For any kind of field, let's rely on the broken handler functionality.
+    }
+  }
+
+}