<?php

/**
 * @file
 * Defines Drupal hooks for imce module.
 */

use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\WidgetInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\file\FileInterface;
use Drupal\imce\Controller\ImceHelpController;
use Drupal\imce\Imce;
use Drupal\imce\ImceFileField;

/**
 * Implements hook_theme().
 */
function imce_theme() {
  return [
    'imce_page' => [
      'render element' => 'page',
    ],
    'imce_help' => [
      'variables' => [
        'videos' => [],
        'markup' => '',
      ],
    ],
  ];
}

/**
 * Implements hook_file_download().
 */
function imce_file_download($uri) {
  if (Imce::accessFileUri($uri, Imce::currentUser())) {
    return [
      'Content-type' => Imce::service('file.mime_type.guesser')->guessMimeType($uri),
      'Content-Length' => filesize($uri),
    ];
  }
}

/**
 * Implements hook_field_widget_third_party_settings_form().
 *
 * Returns imce settings form for supported file widgets.
 */
function imce_field_widget_third_party_settings_form(WidgetInterface $widget, FieldDefinitionInterface $field_definition, $form_mode, $form, FormStateInterface $form_state) {
  return ImceFileField::widgetSettingsForm($widget);
}

/**
 * Implements hook_field_widget_settings_summary_alter().
 *
 * Sets imce settings summary for supported file widgets.
 */
function imce_field_widget_settings_summary_alter(&$summary, $context) {
  return ImceFileField::alterWidgetSettingsSummary($summary, $context);
}

/**
 * Implements hook_field_widget_single_element_form_alter().
 *
 * Alters widget forms that have imce enabled.
 */
function imce_field_widget_single_element_form_alter(&$element, FormStateInterface $form_state, $context) {
  if ($context['widget']->getThirdPartySetting('imce', 'enabled')) {
    $scheme = $context['items'][$context['delta']]->getFieldDefinition()->getSetting('uri_scheme');
    if (Imce::access(Imce::currentUser(), $scheme)) {
      $element['#scheme'] = $scheme;
      $class = 'Drupal\imce\ImceFileField';
      $element['#process'][] = [$class, 'processWidget'];
      // Make sure default value callbacks are added.
      if (empty($element['#file_value_callbacks'])) {
        $info = Imce::service('element_info')->getInfo($element['#type']);
        if (!empty($info['#file_value_callbacks'])) {
          $element['#file_value_callbacks'] = $info['#file_value_callbacks'];
        }
      }
      $element['#file_value_callbacks'][] = [$class, 'setWidgetValue'];
    }
  }
}

/**
 * Implements hook_form_FORM_ID_alter() for editor_link_dialog form.
 */
function imce_form_editor_link_dialog_alter(&$form, FormStateInterface $form_state, $form_id) {
  imce_process_url_element($form['attributes']['href'], 'link');
}

/**
 * Implements hook_form_FORM_ID_alter() for editor_image_dialog form.
 */
function imce_form_editor_image_dialog_alter(&$form, FormStateInterface $form_state, $form_id) {
  imce_process_url_element($form['attributes']['src'], 'image');
}

/**
 * Integrates Imce into an URL element.
 */
function imce_process_url_element(&$element, $type = 'link') {
  if ($element && Imce::access()) {
    $element['#attributes']['class'][] = 'imce-url-input';
    $element['#attributes']['data-imce-type'] = $type;
    $element['#attached']['library'][] = 'imce/drupal.imce.input';
  }
}

/**
 * Implements hook_form_FORM_ID_alter() for filter_format_form.
 */
function imce_form_filter_format_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  if (isset($form['editor']['settings']['subform']['plugins']['ckeditor5_image']['status'])) {
    $desc = &$form['editor']['settings']['subform']['plugins']['ckeditor5_image']['status']['#description'];
    $str = t('Disable to use IMCE file browser.');
    $desc = $desc ? $desc . ' ' . $str : $str;
  }
}

/**
 * Implements hook_help().
 */
function imce_help($route_name, RouteMatchInterface $route_match) {
  if ($route_name === 'help.page.imce') {
    return ImceHelpController::htmlHelp();
  }
}

/**
 * Implements hook_editor_js_settings_alter().
 */
function imce_editor_js_settings_alter(&$settings) {
  if (!empty($settings['editor']['formats'])) {
    foreach ($settings['editor']['formats'] as &$conf) {
      if (($conf['editor'] ?? '') === 'ckeditor5') {
        // Disable ImceSelector integration if the user has no Imce access.
        $index = array_search('imce.ImceSelector', $conf['editorSettings']['plugins']);
        if ($index !== FALSE && !Imce::access()) {
          array_splice($conf['editorSettings']['plugins'], $index, 1);
        }
      }
    }
  }
}

/**
 * Upload validator that checks invalid characters in file names.
 */
function imce_file_validate_name(FileInterface $file, $filter = '') {
  $errors = [];
  $filename = $file->getFileName();
  if (!Imce::validateFileName($filename, $filter)) {
    $errors[] = t('%filename contains invalid characters.', [
      '%filename' => $filename,
    ]);
  }
  return $errors;
}