wxt_library.install

<?php

/**
 * @file
 * Installation and update functions for the WxT Bootstrap Library.
 */

use Drupal\Core\Url;

/**
 * Implements hook_requirements().
 */
function wxt_library_requirements($phase) {
  $requirements = [];

  if ('runtime' == $phase) {
    $has_wxt_core = _wxt_library_verify_library('wxt_library', 'wet-boew');
    $requirements['wxt'] = [
      'title' => t('WxT Library'),
      'value' => $has_wxt_core ? t('Enabled') : t('Not found'),
    ];

    if (!$has_wxt_core) {
      $requirements['wxt']['severity'] = REQUIREMENT_WARNING;
      $wxt_url = Url::fromUri('https://github.com/wet-boew/wet-boew', ['attributes' => ['target' => '_blank']]);
      $requirements['wxt']['description'] = [
        '#prefix' => ' ',
        '#markup' => t('wxt_library module requires <a href=":wxt_link">WxT</a> core jQuery Framework to properly render data.', [':wxt_link' => $wxt_url->toUriString()]),
      ];
    }
  }

  return $requirements;
}

/**
 * Verify that the library files exist.
 *
 * @param string $extension
 *   The name of the extension that registered a library.
 * @param string $name
 *   The name of a registered library to retrieve.
 *
 * @return bool
 *   TRUE if all files of this library exists, FALSE otherwise
 *
 * @see https://drupal.org/node/2231385
 */
function _wxt_library_verify_library($extension, $name) {
  /** @var Drupal\Core\Asset\LibraryDiscovery $library_discovery */
  $library_discovery = \Drupal::service('library.discovery');
  $library = $library_discovery->getLibraryByName($extension, $name);

  $exist = TRUE;
  if ($library['js']) {
    foreach ($library['js'] as $js) {
      if ($js['type'] == 'file') {
        if (!file_exists(DRUPAL_ROOT . '/' . $js['data'])) {
          $exist = FALSE;
        }
      }
    }
  }

  if ($library['css']) {
    foreach ($library['css'] as $css) {
      if ($css['type'] == 'file') {
        if (!file_exists(DRUPAL_ROOT . '/' . $css['data'])) {
          $exist = FALSE;
        }
      }
    }
  }

  if ($library['dependencies']) {
    foreach ($library['dependencies'] as $dependency) {
      $parts = explode('/', $dependency);
      $exist = _wxt_library_verify_library($parts[0], $parts[1]);
    }
  }

  return $exist;
}