<?php

/**
 * @file
 * Contains install and update functions for Linkit.
 */

/**
 * Implements hook_uninstall().
 */
function linkit_uninstall() {
  $config_factory = \Drupal::configFactory();

  // Remove the image styles that Linkit has installed.
  $config_factory->getEditable('image.style.linkit_result_thumbnail')->delete();
}

/**
 * Updates Linkit from 4 to 5.
 *
 * Removes linkit profile attributes.
 * Replaces the linkit ckeditor plugin with drupallink.
 * Enables the linkit filter on text formats where linkit is used.
 * Adds 'data-entity-type' and 'data-entity-uuid' attributes to the <a> tag
 * if filter_html is activated.
 */
function linkit_update_8500() {
  $config_factory = \Drupal::configFactory();

  // Iterate on all profile configuration entities.
  foreach ($config_factory->listAll('linkit.linkit_profile.') as $id) {
    $profile = $config_factory->getEditable($id);
    // Remove all attributes.
    $profile->clear('attributes')->save(TRUE);
  }

  // An array that will be filled with text format ids that we should enable the
  // new linkit_filter for.
  $linkit_enabled_formats = [];

  // Iterate on all editor configuration entities.
  foreach ($config_factory->listAll('editor.editor.') as $id) {
    $editor_config = $config_factory->getEditable($id);

    // Save the old settings.
    $old_linkit_settings = $editor_config->get('settings.plugins.linkit');

    $drupal_link_in_use = FALSE;
    $old_linkit_button_path = NULL;

    // If the editor has old linkit settings, perform update tasks.
    if (!is_null($old_linkit_settings)) {
      // Remove the old linkit settings.
      $editor_config->clear('settings.plugins.linkit');
      $editor_config->save(TRUE);

      // Add the format id that the editor is using.
      $linkit_enabled_formats[] = $editor_config->get('format');

      // Remove the old linkit plugin from the toolbar, and check if DrupalLink
      // is present in the toolbar as linkit now extends this plugin.
      $toolbar_rows = $editor_config->get('settings.toolbar.rows');
      foreach ($toolbar_rows as $row_index => $row) {
        foreach ($row as $button_group_index => $button_group) {
          foreach ($button_group['items'] as $item__name) {
            if ($item__name === 'Linkit') {
              $old_linkit_button_path = 'settings.toolbar.rows.' . $row_index . '.' . $button_group_index . '.items';
            }

            if ($item__name === 'DrupalLink') {
              $drupal_link_in_use = TRUE;
            }
          }
        }
      }

      if ($old_linkit_button_path) {
        $buttons = $editor_config->get($old_linkit_button_path);
        $index = array_search('Linkit', $buttons);
        // If the DrupalLink plugin is not present in the toolbar, lets add it
        // in the same button group as the old linkit plugin was in.
        if (!$drupal_link_in_use) {
          $buttons[$index] = 'DrupalLink';
        }
        else {
          unset($buttons[$index]);
        }
        $editor_config->set($old_linkit_button_path, array_values($buttons));
        $editor_config->save(TRUE);
      }

      // Set the linkit settings to the DrupalLink.
      $drupal_link_settings = [
        'linkit_enabled' => TRUE,
        'linkit_profile' => $old_linkit_settings['linkit_profile'],
      ];
      $editor_config->set('settings.plugins.drupallink', $drupal_link_settings);
      $editor_config->save(TRUE);
    }
  }

  // Enable the linkit_filter for all formats that is used with linkit.
  foreach ($linkit_enabled_formats as $filter_id) {
    $config = $config_factory->getEditable('filter.format.' . $filter_id);
    $filter_html_weight = $config->get('filters.filter_html.weight');

    $linkit_filter = [
      'id' => 'linkit',
      'provider' => 'linkit',
      'status' => TRUE,
      'weight' => $filter_html_weight ? ($filter_html_weight - 1) : -15,
      'settings' => [
        'title' => FALSE,
      ],
    ];
    $config->set('filters.linkit', $linkit_filter);

    $allowed_html = $config->get('filters.filter_html.settings.allowed_html');
    if (!empty($allowed_html)) {
      preg_match_all('/<([\w]+)[^>]*>/', $allowed_html, $out);
      $current_mapping = array_combine($out[1], $out[0]);

      if (isset($current_mapping['a'])) {
        $allowed_html = str_replace($current_mapping['a'], str_replace('>', ' data-entity-type data-entity-uuid>', $current_mapping['a']), $allowed_html);
      }
      else {
        $allowed_html .= ' <a href hreflang data-entity-type data-entity-uuid>';
      }
      $config->set('filters.filter_html.settings.allowed_html', $allowed_html);
    }

    $config->save(TRUE);
  }
}

/**
 * Prepare anchor attributes for substitution plugins.
 */
function linkit_update_8501() {
  $config_factory = \Drupal::configFactory();

  // Update all filter formats that allow the data-entity-uuid attribute to also
  // allow the data-entity-substitution attribute.
  foreach ($config_factory->listAll('filter.format.') as $id) {
    $filter = $config_factory->getEditable($id);
    if ($allowed_html = $filter->get('filters.filter_html.settings.allowed_html')) {
      $allowed_html = str_replace('data-entity-uuid', 'data-entity-uuid data-entity-substitution', $allowed_html);
      $filter->set('filters.filter_html.settings.allowed_html', $allowed_html);
      $filter->save(TRUE);
    }
  }

  // Update all "file" matchers to the "file" substitution plugin, to maintain
  // existing behavior out of the box.
  $config_factory = \Drupal::configFactory();
  foreach ($config_factory->listAll('linkit.linkit_profile.') as $id) {
    $profile = $config_factory->getEditable($id);
    foreach ($profile->get('matchers') as $key => $matcher) {
      $settings = $profile->get('matchers.' . $key . '.settings');
      $settings['substitution_type'] = $matcher['id'] === 'entity:file' ? 'file' : 'canonical';
      $profile->set('matchers.' . $key . '.settings', $settings);
    }
    $profile->save(TRUE);
  }
}

/**
 * Rename profile property 'result_description' to 'metadata'.
 */
function linkit_update_8502() {
  $config_factory = \Drupal::configFactory();
  foreach ($config_factory->listAll('linkit.linkit_profile.') as $id) {
    $profile = $config_factory->getEditable($id);

    foreach ($profile->get('matchers') as $key => $matcher) {
      $old_value = $profile->get('matchers.' . $key . '.settings.result_description');
      $profile->set('matchers.' . $key . '.settings.metadata', $old_value);
      $profile->clear('matchers.' . $key . '.settings.result_description');
    }

    $profile->save(TRUE);
  }
}

/**
 * Remove imce integration settings.
 */
function linkit_update_8503() {
  $config_factory = \Drupal::configFactory();
  foreach ($config_factory->listAll('linkit.linkit_profile.') as $id) {
    $profile = $config_factory->getEditable($id);
    $profile->clear('third_party_settings.imce');
    $profile->save(TRUE);
  }
}