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   1  <?php
   2  /**
   3   * @package     Joomla.Plugin
   4   * @subpackage  Fields.Media
   5   *
   6   * @copyright   (C) 2017 Open Source Matters, Inc. <https://www.joomla.org>
   7   * @license     GNU General Public License version 2 or later; see LICENSE.txt
   8   */
   9  
  10  defined('_JEXEC') or die;
  11  
  12  use Joomla\CMS\Factory;
  13  use Joomla\CMS\Form\Form;
  14  
  15  /**
  16   * Fields Media Plugin
  17   *
  18   * @since  3.7.0
  19   */
  20  class PlgFieldsMedia extends \Joomla\Component\Fields\Administrator\Plugin\FieldsPlugin
  21  {
  22      /**
  23       * Transforms the field into a DOM XML element and appends it as a child on the given parent.
  24       *
  25       * @param   stdClass    $field   The field.
  26       * @param   DOMElement  $parent  The field node parent.
  27       * @param   Form        $form    The form.
  28       *
  29       * @return  DOMElement
  30       *
  31       * @since   4.0.0
  32       */
  33  	public function onCustomFieldsPrepareDom($field, DOMElement $parent, Form $form)
  34      {
  35          $fieldNode = parent::onCustomFieldsPrepareDom($field, $parent, $form);
  36  
  37          if (!$fieldNode)
  38          {
  39              return $fieldNode;
  40          }
  41  
  42          $fieldNode->setAttribute('type', 'accessiblemedia');
  43  
  44          if (Factory::getApplication()->getIdentity()->authorise('core.create', 'com_media'))
  45          {
  46              $fieldNode->setAttribute('disabled', 'false');
  47          }
  48  
  49          return $fieldNode;
  50      }
  51  
  52      /**
  53       * Before prepares the field value.
  54       *
  55       * @param   string     $context  The context.
  56       * @param   \stdclass  $item     The item.
  57       * @param   \stdclass  $field    The field.
  58       *
  59       * @return  void
  60       *
  61       * @since   4.0.0
  62       */
  63  	public function onCustomFieldsBeforePrepareField($context, $item, $field)
  64      {
  65          // Check if the field should be processed by us
  66          if (!$this->isTypeSupported($field->type))
  67          {
  68              return;
  69          }
  70  
  71          // Check if the field value is an old (string) value
  72          $field->value = $this->checkValue($field->value);
  73      }
  74  
  75      /**
  76       * Before prepares the field value.
  77       *
  78       * @param   string  $value  The value to check.
  79       *
  80       * @return  array  The checked value
  81       *
  82       * @since   4.0.0
  83       */
  84  	private function checkValue($value)
  85      {
  86          json_decode($value);
  87  
  88          if (json_last_error() === JSON_ERROR_NONE)
  89          {
  90              return (array) json_decode($value, true);
  91          }
  92  
  93          return array('imagefile' => $value, 'alt_text' => '');
  94      }
  95  }