simple_image_rotate.module in Simple Image Rotate 1.0.x

This is the Simple Image Rotate module for rotating uploaded image files.

File

simple_image_rotate.module

<?php

/**
 * @file
 * This is the Simple Image Rotate module for rotating uploaded image files.
 */
use Drupal\field\Entity\FieldConfig;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Link;
use Drupal\Core\Url;
use Drupal\Core\Render\Element;
use Drupal\Core\Entity\EntityInterface;
use Drupal\file\Entity\File;
use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function simple_image_rotate_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.simple_image_rotate':
      $text = file_get_contents(__DIR__ . '/README.md');
      if (!\Drupal::moduleHandler()
        ->moduleExists('markdown')) {
        return '<pre>' . $text . '</pre>';
      }
      else {

        // Use the Markdown filter to render the README.
        $filter_manager = \Drupal::service('plugin.manager.filter');
        $settings = \Drupal::configFactory()
          ->get('markdown.settings')
          ->getRawData();
        $config = [
          'settings' => $settings,
        ];
        $filter = $filter_manager
          ->createInstance('markdown', $config);
        return $filter
          ->process($text, 'en');
      }
  }
  return NULL;
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function simple_image_rotate_form_field_config_edit_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  $image_field = $form_state
    ->getFormObject()
    ->getEntity();
  $field_type = $image_field
    ->getType();
  if ($field_type == "image") {
    $form['enable_rotate'] = [
      '#type' => 'checkbox',
      '#title' => t('Enable rotate icon'),
      '#description' => t('If checked rotate icon will appear near each uploaded image.'),
      '#default_value' => $image_field
        ->getThirdPartySetting('simple_image_rotate', 'enable_rotate', FALSE),
      '#weight' => 16,
    ];
    $form['#entity_builders'][] = 'simple_image_rotate_image_field_form_builder';
  }
}

/**
 * Entity builder for the image field edit form with third party options.
 *
 * @see simple_image_rotate_form_field_config_edit_form_alter()
 */
function simple_image_rotate_image_field_form_builder($entity_type, FieldConfig $field_form, &$form, FormStateInterface $form_state) {
  $field_form
    ->setThirdPartySetting('simple_image_rotate', 'enable_rotate', $form_state
    ->getValue('enable_rotate'));
}

/**
 * Implements hook_field_widget_multivalue_form_alter().
 */
function simple_image_rotate_field_widget_multivalue_form_alter(array &$elements, FormStateInterface $form_state, array $context) {
  $field_definition = $context['items']
    ->getFieldDefinition();
  $field_name = $field_definition
    ->getType();
  if ($field_name == 'image' && \Drupal::currentUser()
    ->hasPermission('rotate images')) {
    if (!$field_definition instanceof ThirdPartySettingsInterface) {
      return;
    }
    if ($field_definition
      ->getThirdPartySetting('simple_image_rotate', 'enable_rotate') == 1) {

      // Attach JS/CSS for rotate icon.
      $elements['#attached']['library'][] = 'simple_image_rotate/simple_image_rotate';

      // If this is a multivalue field, we want to modify every instance of the field on the form,
      // so we iterate.
      foreach (Element::children($elements) as $key => $child) {

        // Skip upload new image button.
        if (empty($elements[$key]['#default_value']['fids'])) {
          continue;
        }

        // Add rotate icon and hidden rotate field.
        $elements[$key]['rotate'] = [
          '#type' => 'hidden',
          '#attributes' => [
            'class' => 'rotate',
          ],
          '#value' => 0,
        ];
        $elements[$key]['#process'][] = 'simple_image_rotate_widget_process';
      }
    }
  }
}

/**
 * Element #process callback function; process widget type image_image.
 */
function simple_image_rotate_widget_process($element, FormStateInterface $form_state) {
  if (isset($element['#files']) && count($element['#files']) > 0) {
    $options = [
      'attributes' => [
        'title' => t('Rotate image clockwise'),
        'class' => [
          'rotate-icon',
        ],
        'data-weight' => $element['#array_parents'][2],
        'data-rotate' => 0,
        'rel' => 'nofollow',
        'data-fid' => $element['fids']['#value'][0],
      ],
    ];
    $element['rotate_link'] = Link::fromTextAndUrl(t('&#8635;'), Url::fromUserInput('#', $options))
      ->toRenderable();
  }
  return $element;
}

/**
 * Implements hook_entity_presave().
 */
function simple_image_rotate_entity_presave(EntityInterface $entity) {

  // Only applies to content entities, not config.
  if (!is_a($entity, 'Drupal\\Core\\Config\\Entity\\ConfigEntityBase')) {
    simple_image_rotate_rotate_image($entity);
  }
}

/**
 * Rotates image.
 */
function simple_image_rotate_rotate_image(EntityInterface &$entity) {
  $type = $entity
    ->getEntityType()
    ->id();
  $bundle = $entity
    ->bundle();
  $entityManager = \Drupal::service('entity_field.manager');
  $fields = $entityManager
    ->getFieldDefinitions($type, $bundle);
  foreach ($fields as $field_name => $field) {
    if ($field
      ->getType() == "image") {
      if (!$field instanceof ThirdPartySettingsInterface) {
        continue;
      }
      if ($field
        ->getThirdPartySetting('simple_image_rotate', 'enable_rotate') == 1) {
        $instances = $entity
          ->get($field_name);
        foreach ($instances as $delta => $instance) {

          // If rotate angle is indicated.
          $values = $instance
            ->getValue();
          if (isset($values["rotate"]) && $values["rotate"]) {

            // Load image file.
            $fid = $values["target_id"];
            $file = File::load($fid);

            // Get a new filename with '_r[counter]' suffix.
            if (preg_match('#_r([\\d]+)\\.[^.]+$#i', $file
              ->getFileUri(), $matches)) {
              $file_counter = $matches[1];
              $new_uri = $file
                ->getFileUri();
            }
            else {
              $file_counter = 1;
              $pos = strrpos($file
                ->getFileUri(), '.');
              $new_uri = substr_replace($file
                ->getFileUri(), '_r' . $file_counter, $pos, 0);
            }

            // Increment filename counter if filename is occupied.
            while (file_exists($new_uri)) {
              $find = '_r' . $file_counter;
              $file_counter++;
              $replace = '_r' . $file_counter;
              $new_uri = str_replace($find, $replace, $new_uri);
            }

            // Move image file to a new location.
            if (file_move($file, $new_uri, 'FILE_EXIST_ERROR')) {

              // Update file object after moving file.
              $file = File::load($fid);

              // Rotate image and save image object.
              $image = \Drupal::service('image.factory')
                ->get($file
                ->getFileUri());
              try {
                $image
                  ->rotate($values['rotate']);
                if ($image
                  ->save()) {

                  // Reload image to get new width, height and filesize.
                  $image = \Drupal::service('image.factory')
                    ->get($file
                    ->getFileUri());

                  // Update image width and height in entity.
                  $instance
                    ->set("width", $image
                    ->getWidth());
                  $instance
                    ->set("height", $image
                    ->getHeight());

                  // Update file.
                  $file
                    ->setSize($image
                    ->getFileSize());
                  $file
                    ->save();
                }
              } catch (Exception $ex) {
                \Drupal::logger('simple_image_rotate')
                  ->notice(t('Problem rotating image: @message', array(
                  '@message' => $ex
                    ->getMessage(),
                )));
              }
            }
          }
        }
      }
    }
  }
}

Functions

Name	Description
simple_image_rotate_entity_presave	Implements hook_entity_presave().
simple_image_rotate_field_widget_multivalue_form_alter	Implements hook_field_widget_multivalue_form_alter().
simple_image_rotate_form_field_config_edit_form_alter	Implements hook_form_FORM_ID_alter().
simple_image_rotate_help	Implements hook_help().
simple_image_rotate_image_field_form_builder	Entity builder for the image field edit form with third party options.
simple_image_rotate_rotate_image	Rotates image.
simple_image_rotate_widget_process	Element #process callback function; process widget type image_image.