<?php

/**
 * @file
 * Contains install, update and uninstall functions for the Workspaces module.
 */

use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Entity\ContentEntityNullStorage;
use Drupal\Core\Field\BaseFieldDefinition;
use Drupal\workspaces\Entity\Workspace;

/**
 * Implements hook_requirements().
 */
function workspaces_requirements($phase) {
  $requirements = [];
  if ($phase === 'install') {
    if (\Drupal::moduleHandler()->moduleExists('workspace')) {
      $requirements['workspace_incompatibility'] = [
        'severity' => REQUIREMENT_ERROR,
        'description' => t('Workspaces can not be installed when the contributed Workspace module is also installed. See the <a href=":link">upgrade path</a> page for more information on how to upgrade.', [
          ':link' => 'https://www.drupal.org/node/2987783',
        ]),
      ];
    }
  }

  return $requirements;
}

/**
 * Implements hook_module_preinstall().
 */
function workspaces_module_preinstall($module) {
  if ($module !== 'workspaces') {
    return;
  }

  /** @var \Drupal\workspaces\WorkspaceManagerInterface $workspace_manager */
  $workspace_manager = \Drupal::service('workspaces.manager');
  $entity_definition_update_manager = \Drupal::entityDefinitionUpdateManager();
  foreach ($entity_definition_update_manager->getEntityTypes() as $entity_type) {
    $revision_metadata_keys = $entity_type->get('revision_metadata_keys');
    if ($workspace_manager->isEntityTypeSupported($entity_type)) {
      $entity_type->setRevisionMetadataKey('workspace', 'workspace');
      $entity_definition_update_manager->updateEntityType($entity_type);
    }
  }
}

/**
 * Implements hook_install().
 */
function workspaces_install() {
  // Set the owner of these default workspaces to be first user which which has
  // the 'administrator' role. This way we avoid hard coding user ID 1 for sites
  // that prefer to not give it any special meaning.
  $admin_roles = \Drupal::entityTypeManager()->getStorage('user_role')->getQuery()
    ->condition('is_admin', TRUE)
    ->execute();
  if (!empty($admin_roles)) {
    $query = \Drupal::entityTypeManager()->getStorage('user')->getQuery()
      ->condition('roles', $admin_roles, 'IN')
      ->condition('status', 1)
      ->sort('uid', 'ASC')
      ->range(0, 1);
    $result = $query->execute();
  }

  // Default to user ID 1 if we could not find any other administrator users.
  $owner_id = !empty($result) ? reset($result) : 1;

  // Create a 'stage' workspace by default.
  Workspace::create([
    'id' => 'stage',
    'label' => 'Stage',
    'uid' => $owner_id,
  ])->save();
}

/**
 * Implements hook_schema().
 */
function workspaces_schema() {
  $schema['workspace_association'] = [
    'description' => 'Stores the association between entity revisions and their workspace.',
    'fields' => [
      'workspace' => [
        'type' => 'varchar_ascii',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The workspace ID.',
      ],
      'target_entity_type_id' => [
        'type' => 'varchar_ascii',
        'length' => EntityTypeInterface::ID_MAX_LENGTH,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The ID of the associated entity type.',
      ],
      'target_entity_id' => [
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'The ID of the associated entity.',
      ],
      'target_entity_revision_id' => [
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'The revision ID of the associated entity.',
      ],
    ],
    'indexes' => [
      'target_entity_revision_id' => ['target_entity_revision_id'],
    ],
    'primary key' => ['workspace', 'target_entity_type_id', 'target_entity_id'],
  ];

  return $schema;
}

/**
 * Add the 'workspace' revision metadata field on all supported entity types.
 */
function workspaces_update_8801() {
  /** @var \Drupal\workspaces\WorkspaceManagerInterface $workspace_manager */
  $workspace_manager = \Drupal::service('workspaces.manager');
  $entity_definition_update_manager = \Drupal::entityDefinitionUpdateManager();
  foreach ($entity_definition_update_manager->getEntityTypes() as $entity_type_id => $entity_type) {
    if ($workspace_manager->isEntityTypeSupported($entity_type)) {
      $revision_metadata_keys = $entity_type->get('revision_metadata_keys');

      if (!isset($revision_metadata_keys['workspace'])) {
        $revision_metadata_field_name = 'workspace';

        // Bail out if there's an existing field called 'workspace'.
        if ($entity_definition_update_manager->getFieldStorageDefinition($revision_metadata_field_name, $entity_type_id)) {
          throw new \RuntimeException("An existing 'workspace' field was found for the '$entity_type_id' entity type. Set the 'workspace' revision metadata key to use a different field name and run this update function again.");
        }

        $entity_type->setRevisionMetadataKey('workspace', $revision_metadata_field_name);
        $entity_definition_update_manager->updateEntityType($entity_type);
      }
      else {
        $revision_metadata_field_name = $revision_metadata_keys['workspace'];
      }

      $field_storage = BaseFieldDefinition::create('entity_reference')
        ->setLabel(t('Workspace'))
        ->setDescription(t('Indicates the workspace that this revision belongs to.'))
        ->setSetting('target_type', 'workspace')
        ->setInternal(TRUE)
        ->setTranslatable(FALSE)
        ->setRevisionable(TRUE);

      $entity_definition_update_manager->installFieldStorageDefinition($revision_metadata_field_name, $entity_type_id, 'workspaces', $field_storage);
    }
  }

  return t("The 'workspace' revision metadata field has been installed.");
}

/**
 * Add the 'parent' field to the 'workspace' entity type.
 */
function workspaces_update_8802() {
  $entity_definition_update_manager = \Drupal::entityDefinitionUpdateManager();

  // Install the new 'parent' field.
  $storage_definition = BaseFieldDefinition::create('entity_reference')
    ->setLabel(t('Parent'))
    ->setDescription(t('The parent workspace.'))
    ->setSetting('target_type', 'workspace')
    ->setReadOnly(TRUE);

  $entity_definition_update_manager->installFieldStorageDefinition('parent', 'workspace', 'workspaces', $storage_definition);
}

/**
 * Remove the Workspace Association entity storage if necessary.
 */
function workspaces_update_8803() {
  $entity_definition_update_manager = \Drupal::entityDefinitionUpdateManager();
  $entity_type = $entity_definition_update_manager->getEntityType('workspace_association');

  // We can't migrate the workspace association data if the entity type is not
  // using its default storage.
  // @see workspaces_post_update_move_association_data()
  if ($entity_type && $entity_type->getHandlerClasses()['storage'] === 'Drupal\workspaces\WorkspaceAssociationStorage') {
    \Drupal::state()->set('workspaces_update_8803.tables', [
      'base_table' => $entity_type->getBaseTable(),
      'revision_table' => $entity_type->getRevisionTable(),
    ]);
    $entity_type->setStorageClass(ContentEntityNullStorage::class);
    $entity_definition_update_manager->uninstallEntityType($entity_type);
  }
}