<?php

/**
 * @file
 * Contains islandora.module.
 *
 * This file is part of the Islandora Project.
 *
 * (c) Islandora Foundation
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @author Diego Pino Navarro <dpino@metro.org> https://github.com/diegopino
 */

use Drupal\Core\Database\IntegrityConstraintViolationException;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function islandora_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the islandora module.
    case 'help.page.islandora':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('This is a placeholder for future help text about Islandora.') . '</p>';
      return $output;

    default:
  }
}

/**
 * Implements hook_theme().
 */
function islandora_theme() {
  $theme = [];
  $theme['fedora_resource'] = [
    'render element' => 'elements',
    'file' => 'fedora_resource.page.inc',
    'template' => 'fedora_resource',
  ];
  $theme['fedora_resource_content_add_list'] = [
    'render element' => 'content',
    'variables' => ['content' => NULL],
    'file' => 'fedora_resource.page.inc',
  ];
  return $theme;
}

/**
 * Implements hook_theme_suggestions_HOOK().
 */
function islandora_theme_suggestions_fedora_resource(array $variables) {
  $suggestions = [];
  $entity = $variables['elements']['#fedora_resource'];
  $sanitized_view_mode = strtr($variables['elements']['#view_mode'], '.', '_');

  $suggestions[] = 'fedora_resource__' . $sanitized_view_mode;
  $suggestions[] = 'fedora_resource__' . $entity->bundle();
  $suggestions[] = 'fedora_resource__' . $entity->bundle() . '__' . $sanitized_view_mode;
  $suggestions[] = 'fedora_resource__' . $entity->id();
  $suggestions[] = 'fedora_resource__' . $entity->id() . '__' . $sanitized_view_mode;
  return $suggestions;
}

/**
 * Implements hook_rdf_namespaces().
 */
function islandora_rdf_namespaces() {
  // Yes, it's amazing, rdf is not registered by default!
  return [
    'ldp'  => 'http://www.w3.org/ns/ldp#',
    'dc11' => 'http://purl.org/dc/elements/1.1/',
    'nfo' => 'http://www.semanticdesktop.org/ontologies/2007/03/22/nfo/v1.1/',
    'ebucore' => 'http://www.ebu.ch/metadata/ontologies/ebucore/ebucore#',
    'fedora' => 'http://fedora.info/definitions/v4/repository#',
    'owl' => 'http://www.w3.org/2002/07/owl#',
    'ore' => 'http://www.openarchives.org/ore/terms/',
    'rdf' => 'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
    'islandora' => 'http://islandora.ca/CLAW/',
    'pcdm' => 'http://pcdm.org/models#',
  ];
}

/**
 * Implements hook_ENTITY_TYPE_insert().
 */
function islandora_fedora_resource_insert(EntityInterface $entity) {
  // Creates a record in the db to track the number of changes to the entity.
  $versionCounter = \Drupal::service('islandora.versioncounter');
  try {
    $versionCounter->create($entity->uuid());
  }
  catch (IntegrityConstraintViolationException $e) {
    \Drupal::logger('islandora')->error(
      'Attempted to create duplicate entry for @uuid in version counter ' .
      'table. This should never happen.',
      ['@uuid' => $entity->uuid()]
    );
  }
}

/**
 * Implements hook_ENTITY_TYPE_update().
 */
function islandora_fedora_resource_update(EntityInterface $entity) {
  // Increments the number of changes to the entity.
  $versionCounter = \Drupal::service('islandora.versioncounter');
  $versionCounter->increment($entity->uuid());
}

/**
 * Implements hook_ENTITY_TYPE_update().
 */
function islandora_fedora_resource_delete(EntityInterface $entity) {
  // Deletes the record in the db to track the number of changes to the entity.
  $versionCounter = \Drupal::service('islandora.versioncounter');
  $versionCounter->delete($entity->uuid());
}