<?php
/**
 * @package     Joomla.Plugin
 * @subpackage  Fields.Repeatable
 *
 * @copyright   (C) 2018 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

use Joomla\CMS\MVC\Model\BaseDatabaseModel;

defined('_JEXEC') or die;

JLoader::import('components.com_fields.libraries.fieldsplugin', JPATH_ADMINISTRATOR);

/**
 * Repeatable plugin.
 *
 * @since  3.9.0
 */
class PlgFieldsRepeatable extends FieldsPlugin
{
	/**
	 * Transforms the field into a DOM XML element and appends it as a child on the given parent.
	 *
	 * @param   stdClass    $field   The field.
	 * @param   DOMElement  $parent  The field node parent.
	 * @param   JForm       $form    The form.
	 *
	 * @return  DOMElement
	 *
	 * @since   3.9.0
	 */
	public function onCustomFieldsPrepareDom($field, DOMElement $parent, JForm $form)
	{
		$fieldNode = parent::onCustomFieldsPrepareDom($field, $parent, $form);

		if (!$fieldNode)
		{
			return $fieldNode;
		}

		$readonly = false;

		if (!FieldsHelper::canEditFieldValue($field))
		{
			$readonly = true;
		}

		$fieldNode->setAttribute('type', 'subform');
		$fieldNode->setAttribute('multiple', 'true');
		$fieldNode->setAttribute('layout', 'joomla.form.field.subform.repeatable-table');

		// Build the form source
		$fieldsXml = new SimpleXMLElement('<form/>');
		$fields    = $fieldsXml->addChild('fields');

		// Get the form settings
		$formFields = $field->fieldparams->get('fields');

		// Add the fields to the form
		foreach ($formFields as $index => $formField)
		{
			$child = $fields->addChild('field');
			$child->addAttribute('name', $formField->fieldname);
			$child->addAttribute('type', $formField->fieldtype);
			$child->addAttribute('readonly', $readonly);

			if (isset($formField->fieldfilter))
			{
				$child->addAttribute('filter', $formField->fieldfilter);
			}
		}

		$fieldNode->setAttribute('formsource', $fieldsXml->asXML());

		// Return the node
		return $fieldNode;
	}

	/**
	 * The save event.
	 *
	 * @param   string   $context  The context
	 * @param   JTable   $item     The article data
	 * @param   boolean  $isNew    Is new item
	 * @param   array    $data     The validated data
	 *
	 * @return  boolean
	 *
	 * @since   3.9.0
	 */
	public function onContentAfterSave($context, $item, $isNew, $data = array())
	{
		// Create correct context for category
		if ($context == 'com_categories.category')
		{
			$context = $item->get('extension') . '.categories';

			// Set the catid on the category to get only the fields which belong to this category
			$item->set('catid', $item->get('id'));
		}

		// Check the context
		$parts = FieldsHelper::extract($context, $item);

		if (!$parts)
		{
			return true;
		}

		// Compile the right context for the fields
		$context = $parts[0] . '.' . $parts[1];

		// Loading the fields
		$fields = FieldsHelper::getFields($context, $item);

		if (!$fields)
		{
			return true;
		}

		// Get the fields data
		$fieldsData = !empty($data['com_fields']) ? $data['com_fields'] : array();

		// Loading the model
		/** @var FieldsModelField $model */
		$model = BaseDatabaseModel::getInstance('Field', 'FieldsModel', array('ignore_request' => true));

		// Loop over the fields
		foreach ($fields as $field)
		{
			// Find the field of this type repeatable
			if ($field->type !== $this->_name)
			{
				continue;
			}

			// Determine the value if it is available from the data
			$value = key_exists($field->name, $fieldsData) ? $fieldsData[$field->name] : null;

			// Handle json encoded values
			if (!is_array($value))
			{
				$value = json_decode($value, true);
			}

			// Setting the value for the field and the item
			$model->setFieldValue($field->id, $item->get('id'), json_encode($value));
		}

		return true;
	}
}