Ckeditor5TestModuleAllowedImageHooks.php

<?php

declare (strict_types=1);
namespace Drupal\ckeditor5_test_module_allowed_image\Hook;

use Drupal\ckeditor5\Plugin\CKEditor5PluginDefinition;
use Drupal\Core\Hook\Attribute\Hook;

/**
 * Hook implementations for ckeditor5_test_module_allowed_image.
 */
class Ckeditor5TestModuleAllowedImageHooks {
    
    /**
     * Implements hook_ckeditor5_plugin_info_alter().
     */
    public function ckeditor5PluginInfoAlter(array &$plugin_definitions) : void {
        // Add a custom file type to the image upload plugin. Note that 'svg+xml'
        // below should be an IANA image media type Name, with the "image/" prefix
        // omitted. In other words: a subtype of type image.
        // @see https://www.iana.org/assignments/media-types/media-types.xhtml#image
        // @see https://ckeditor.com/docs/ckeditor5/latest/api/module_image_imageconfig-ImageUploadConfig.html#member-types
        $image_upload_plugin_definition = $plugin_definitions['ckeditor5_imageUpload']->toArray();
        $image_upload_plugin_definition['ckeditor5']['config']['image']['upload']['types'][] = 'svg+xml';
        $plugin_definitions['ckeditor5_imageUpload'] = new CKEditor5PluginDefinition($image_upload_plugin_definition);
    }

}