<?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\Model;

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

use Joomla\CMS\Factory;
use Joomla\CMS\Helper\TagsHelper;
use Joomla\CMS\Language\Multilanguage;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\Model\ItemModel;
use Joomla\CMS\Table\Table;
use Joomla\Database\ParameterType;
use Joomla\Registry\Registry;

/**
 * Weblinks Component Model for a Weblink record
 *
 * @since  1.5
 */
class WeblinkModel extends ItemModel
{
    /**
     * Store loaded weblink items
     *
     * @var    array
     * @since  1.6
     */
    protected $_item = null;

    /**
     * Model context string.
     *
     * @var  string
     */
    protected $_context = 'com_weblinks.weblink';

    /**
     * Method to auto-populate the model state.
     *
     * Note. Calling getState in this method will result in recursion.
     *
     * @return  void
     *
     * @since   1.6
     */
    protected function populateState()
    {
        $app = Factory::getApplication();

        // Load the object state.
        $pk = $app->getInput()->getInt('id');
        $this->setState('weblink.id', $pk);

        // Load the parameters.
        $params = $app->getParams();
        $this->setState('params', $params);

        $user = $this->getCurrentUser();

        if (!$user->authorise('core.edit.state', 'com_weblinks') && !$user->authorise('core.edit', 'com_weblinks')) {
            $this->setState('filter.published', 1);
            $this->setState('filter.archived', 2);
        }

        $this->setState('filter.language', Multilanguage::isEnabled());
    }

    /**
     * Method to get an object.
     *
     * @param   integer  $pk  The id of the object to get.
     *
     * @return  mixed  Object on success, false on failure.
     */
    public function getItem($pk = null)
    {
        $user = $this->getCurrentUser();

        $pk = (!empty($pk)) ? $pk : (int) $this->getState('weblink.id');

        if ($this->_item === null) {
            $this->_item = [];
        }

        if (!isset($this->_item[$pk])) {
            try {
                $db    = $this->getDatabase();
                $query = $db->getQuery(true)
                    ->select($this->getState('item.select', 'a.*'))
                    ->from('#__weblinks AS a')
                    ->where($db->quoteName('a.id') . ' = :id')
                    ->bind(':id', $pk, ParameterType::INTEGER);

                // Join on category table.
                $query->select('c.title AS category_title, c.alias AS category_alias, c.access AS category_access')
                    ->innerJoin('#__categories AS c on c.id = a.catid')
                    ->where('c.published > 0');

                // Join on user table.
                $query->select('u.name AS author')
                    ->join('LEFT', '#__users AS u on u.id = a.created_by');

                // Filter by language
                if ($this->getState('filter.language')) {
                    $query->whereIn($db->quoteName('a.language'), [Factory::getLanguage()->getTag(), '*'], ParameterType::STRING);
                }

                // Join over the categories to get parent category titles
                $query->select('parent.title as parent_title, parent.id as parent_id, parent.path as parent_route, parent.alias as parent_alias')
                    ->join('LEFT', '#__categories as parent ON parent.id = c.parent_id');

                if (!$user->authorise('core.edit.state', 'com_weblinks') && !$user->authorise('core.edit', 'com_weblinks')) {
                    // Filter by start and end dates.
                    $nowDate = Factory::getDate()->toSql();
                    $query->where('(' . $db->quoteName('a.publish_up')
                        . ' IS NULL OR ' . $db->quoteName('a.publish_up') . ' <= :publish_up)')
                        ->where('(' . $db->quoteName('a.publish_down')
                            . ' IS NULL OR ' . $db->quoteName('a.publish_down') . ' >= :publish_down)')
                        ->bind(':publish_up', $nowDate)
                        ->bind(':publish_down', $nowDate);
                }

                // Filter by published state.
                $published = $this->getState('filter.published');
                $archived  = $this->getState('filter.archived');

                if (is_numeric($published)) {
                    $query->whereIn($db->quoteName('a.state'), [$published, $archived]);
                }

                $db->setQuery($query);

                $data = $db->loadObject();

                if (empty($data)) {
                    throw new \Exception(Text::_('COM_WEBLINKS_ERROR_WEBLINK_NOT_FOUND'), 404);
                }

                // Check for published state if filter set.
                if ((is_numeric($published) || is_numeric($archived)) && (($data->state != $published) && ($data->state != $archived))) {
                    throw new \Exception(Text::_('COM_WEBLINKS_ERROR_WEBLINK_NOT_FOUND'), 404);
                }

                // Convert parameter fields to objects.
                $data->params   = new Registry($data->params);
                $data->metadata = new Registry($data->metadata);

                // Some contexts may not use tags data at all, so we allow callers to disable loading tag data
                if ($this->getState('load_tags', true)) {
                    $data->tags = new TagsHelper();
                    $data->tags->getItemTags('com_weblinks.weblink', $data->id);
                }

                // Compute access permissions.
                if ($this->getState('filter.access')) {
                    // If the access filter has been set, we already know this user can view.
                    $data->params->set('access-view', true);
                } else {
                    // If no access filter is set, the layout takes some responsibility for display of limited information.
                    $groups = $user->getAuthorisedViewLevels();
                    $data->params->set('access-view', \in_array($data->access, $groups) && \in_array($data->category_access, $groups));
                }

                $this->_item[$pk] = $data;
            } catch (\Exception $e) {
                $this->setError($e);
                $this->_item[$pk] = false;
            }
        }

        return $this->_item[$pk];
    }

    /**
     * Returns a reference to the a Table object, always creating it.
     *
     * @param   string  $type    The table type to instantiate
     * @param   string  $prefix  A prefix for the table class name. Optional.
     * @param   array   $config  Configuration array for model. Optional.
     *
     * @return  Table  A database object
     *
     * @since   1.6
     */
    public function getTable($type = 'Weblink', $prefix = 'Administrator', $config = [])
    {
        return parent::getTable($type, $prefix, $config);
    }

    /**
     * Method to increment the hit counter for the weblink
     *
     * @param   integer  $pk  Optional ID of the weblink.
     *
     * @return  boolean  True on success
     */
    public function hit($pk = null)
    {
        if (empty($pk)) {
            $pk = $this->getState('weblink.id');
        }

        return $this->getTable('Weblink')->hit($pk);
    }
}