<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_mails
 *
 * @copyright   (C) 2019 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Mails\Administrator\Helper;

\defined('_JEXEC') or die;

use Joomla\CMS\Factory;

/**
 * Mailtags HTML helper class.
 *
 * @since  4.0.0
 */
abstract class MailsHelper
{
	/**
	 * Display a clickable list of tags for a mail template
	 *
	 * @param   object  $mail       Row of the mail template.
	 * @param   string  $fieldname  Name of the target field.
	 *
	 * @return  string  List of tags that can be inserted into a field.
	 *
	 * @since   4.0.0
	 */
	public static function mailtags($mail, $fieldname)
	{
		Factory::getApplication()->triggerEvent('onMailBeforeTagsRendering', array($mail->template_id, &$mail));

		if (!isset($mail->params['tags']) || !count($mail->params['tags']))
		{
			return '';
		}

		$html = '<ul class="list-group">';

		foreach ($mail->params['tags'] as $tag)
		{
			$html .= '<li class="list-group-item">'
				. '<a href="#" class="edit-action-add-tag" data-tag="{' . strtoupper($tag) . '}" data-target="' . $fieldname . '"'
					. ' title="' . $tag . '">' . $tag . '</a>'
				. '</li>';
		}

		$html .= '</ul>';

		return $html;
	}

	/**
	 * Load the translation files for an extension
	 *
	 * @param   string  $extension  Extension name
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 */
	public static function loadTranslationFiles($extension)
	{
		static $cache = array();

		$extension = strtolower($extension);

		if (isset($cache[$extension]))
		{
			return;
		}

		$lang   = Factory::getLanguage();
		$source = '';

		switch (substr($extension, 0, 3))
		{
			case 'com':
			default:
				$source = JPATH_ADMINISTRATOR . '/components/' . $extension;
				break;

			case 'mod':
				$source = JPATH_SITE . '/modules/' . $extension;
				break;

			case 'plg':
				$parts = explode('_', $extension, 3);

				if (count($parts) > 2)
				{
					$source = JPATH_PLUGINS . '/' . $parts[1] . '/' . $parts[2];
				}
				break;
		}

		$lang->load($extension, JPATH_ADMINISTRATOR)
		|| $lang->load($extension, $source);

		if (!$lang->hasKey(strtoupper($extension)))
		{
			$lang->load($extension . '.sys', JPATH_ADMINISTRATOR)
			|| $lang->load($extension . '.sys', $source);
		}

		$cache[$extension] = true;
	}
}

• [F] MailsHelper.php
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