<?php

/**
 * @package     Joomla.Site
 * @subpackage  com_weblinks
 *
 * @copyright   Copyright (C) 2005 - 2017 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Weblinks\Site\View\Weblink;

use Joomla\CMS\Factory;
use Joomla\CMS\MVC\View\GenericDataException;
use Joomla\CMS\MVC\View\HtmlView as BaseHtmlView;
use Joomla\CMS\Plugin\PluginHelper;
use Joomla\Component\Weblinks\Site\Model\WeblinkModel;

// phpcs:disable PSR1.Files.SideEffects
\defined('_JEXEC') or die;
// phpcs:enable PSR1.Files.SideEffects

/**
 * HTML Weblink View class for the Weblinks component
 *
 * @since  __DEPLOY_VERSION__
 */
class HtmlView extends BaseHtmlView
{
    /**
     * The weblink object
     *
     * @var    \JObject
     */
    protected $item;

    /**
     * The page parameters
     *
     * @var    \Joomla\Registry\Registry|null
     */
    protected $params;

    /**
     * The item model state
     *
     * @var    \Joomla\Registry\Registry
     * @since  1.6
     */
    protected $state;

    /**
     * Execute and display a template script.
     *
     * @param   string  $tpl  The name of the template file to parse; automatically searches through the template paths.
     *
     * @return  mixed  A string if successful, otherwise an Error object.
     *
     * @throws  \Exception
     * @since   __DEPLOY_VERSION__
     */
    public function display($tpl = null)
    {
        $app = Factory::getApplication();

        /* @var WeblinkModel $model */
        $model        = $this->getModel();
        $this->item   = $model->getItem();
        $this->state  = $model->getState();
        $this->params = $this->state->get('params');

        $errors = $model->getErrors();

        if (\count($errors) > 0) {
            $this->handleModelErrors($errors);
        }

        PluginHelper::importPlugin('content');

        // Create a shortcut for $item.
        $item         = $this->item;
        $item->slug   = $item->alias ? ($item->id . ':' . $item->alias) : $item->id;
        $temp         = $item->params;
        $item->params = clone $app->getParams();
        $item->params->merge($temp);
        $offset = $this->state->get('list.offset');
        $app->triggerEvent('onContentPrepare', ['com_weblinks.weblink', &$item, &$item->params, $offset]);
        $item->event                       = new \stdClass();
        $results                           = $app->triggerEvent('onContentAfterTitle', ['com_weblinks.weblink', &$item, &$item->params, $offset]);
        $item->event->afterDisplayTitle    = trim(implode("\n", $results));
        $results                           = $app->triggerEvent('onContentBeforeDisplay', ['com_weblinks.weblink', &$item, &$item->params, $offset]);
        $item->event->beforeDisplayContent = trim(implode("\n", $results));
        $results                           = $app->triggerEvent('onContentAfterDisplay', ['com_weblinks.weblink', &$item, &$item->params, $offset]);
        $item->event->afterDisplayContent  = trim(implode("\n", $results));
        parent::display($tpl);
    }

    /**
     * Handle errors returned by model
     *
     * @param   array  $errors
     *
     * @return void
     * @throws \Exception
     */
    private function handleModelErrors(array $errors): void
    {
        foreach ($errors as $error) {
            // Throws 404 error if weblink item not found
            if ($error instanceof \Exception && $error->getCode() === 404) {
                throw $error;
            }
        }

        // Otherwise, it is database runtime error, and we will throw error 500
        throw new GenericDataException(implode("\n", $errors), 500);
    }
}