webp-8.x-1.0-beta4/webp.install

<?php

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

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

  // The existence of GD, does not mean, that it was compiled with webp
  // support. So check if it has webp capabilities. Otherwise prevent the
  // installation or show an error on the status page.
  $gd_info = gd_info();
  // Let's convert to capital case, so we ensure we always cover both.
  $supported_formats = [];
  if (extension_loaded('imagick')) {
    $supported_formats = array_map('strtoupper', Imagick::queryFormats());
  }

  if (!$gd_info['WebP Support'] && !in_array("WEBP", $supported_formats)) {
    $requirements['webp'] = [
      'title' => t('WebP'),
      'description' => t('The GD or ImageMagick library must be compiled with WebP support on your server. For more information consult the <a href=":php_documentation">PHP documentation</a>.', [':php_documentation' => 'http://php.net/manual/en/book.image.php']),
      'severity' => REQUIREMENT_ERROR,
    ];
  }

  return $requirements;
}

/**
 * Implements hook_install().
 */
function webp_install() {
  // If the Image API Optimize module exists, the user needs to configure
  // a processor first, so there's no use in deleting all image style
  // derivatives.
  if (!\Drupal::moduleHandler()->moduleExists('imageapi_optimize')) {
    /* @var \Drupal\webp\Webp $webp */
    $webp = \Drupal::service('webp.webp');
    $webp->deleteImageStyleDerivatives();
  }
}

/**
 * Implements hook_uninstall().
 */
function webp_uninstall() {
  if (\Drupal::moduleHandler()->moduleExists('imageapi_optimize')) {
    // imageapi_optimize: delete the WebP processor from all pipelines.
    $storage = \Drupal::entityTypeManager()->getStorage('imageapi_optimize_pipeline');
    if ($pipelines = $storage->loadMultiple()) {
      /* @var \Drupal\imageapi_optimize\Entity\ImageAPIOptimizePipeline $pipeline */
      foreach ($pipelines as $pipeline) {
        /* @var \Drupal\imageapi_optimize\ImageAPIOptimizeProcessorPluginCollection $processors */
        if ($processors = $pipeline->getProcessors()) {
          /** @var \Drupal\imageapi_optimize\ImageAPIOptimizeProcessorBase $processor */
          foreach ($processors as $processor) {
            if ($processor->getPluginId() === 'webp_webp') {
              $pipeline->deleteProcessor($processor);
            }
          }
        }
      }
    }
  }
  else {
    /* @var \Drupal\webp\Webp $webp */
    $webp = \Drupal::service('webp.webp');
    $webp->deleteImageStyleDerivatives();
  }
}