<?php

/**
 * @package     Joomla.Administrator
 * @subpackage  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\Administrator\Model;

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

use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Language\Associations;
use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
use Joomla\CMS\MVC\Model\ListModel;
use Joomla\Database\ParameterType;

/**
 * Methods supporting a list of weblink records.
 *
 * @since  1.6
 */
class WeblinksModel extends ListModel
{
    /**
     * Constructor.
     *
     * @param   array                $config   An optional associative array of configuration settings.
     * @param   MVCFactoryInterface  $factory  The factory.
     *
     * @see     JControllerLegacy
     * @since   1.6
     */
    public function __construct($config = [], MVCFactoryInterface $factory = null)
    {
        if (empty($config['filter_fields'])) {
            $config['filter_fields'] = [
                'id', 'a.id',
                'title', 'a.title',
                'alias', 'a.alias',
                'checked_out', 'a.checked_out',
                'checked_out_time', 'a.checked_out_time',
                'catid', 'a.catid', 'category_id',
                'c.title', 'category_title',
                'state', 'a.state', 'published',
                'access', 'a.access',
                'ag.title', 'access_level',
                'created', 'a.created',
                'created_by', 'a.created_by',
                'ordering', 'a.ordering',
                'featured', 'a.featured',
                'language', 'a.language',
                'l.title', 'language_title',
                'hits', 'a.hits',
                'publish_up', 'a.publish_up',
                'publish_down', 'a.publish_down',
                'url', 'a.url',
                'tag',
                'level', 'c.level',
            ];

            $assoc = Associations::isEnabled();

            if ($assoc) {
                $config['filter_fields'][] = 'association';
            }
        }

        parent::__construct($config, $factory);
    }

    /**
     * Method to auto-populate the model state.
     *
     * @param   string  $ordering   An optional ordering field.
     * @param   string  $direction  An optional direction (asc|desc).
     *
     * @return  void
     *
     * @note    Calling getState in this method will result in recursion.
     * @since   1.6
     */
    protected function populateState($ordering = 'a.title', $direction = 'asc')
    {
        $app = Factory::getApplication();

        $forcedLanguage = $app->input->get('forcedLanguage', '', 'cmd');

        // Adjust the context to support modal layouts.
        if ($layout = $app->input->get('layout')) {
            $this->context .= '.' . $layout;
        }

        // Adjust the context to support forced languages.
        if ($forcedLanguage) {
            $this->context .= '.' . $forcedLanguage;
        }

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

        // Force a language.
        if (!empty($forcedLanguage)) {
            $this->setState('filter.language', $forcedLanguage);
        }

        // List state information.
        parent::populateState($ordering, $direction);
    }

    /**
     * Method to get a store id based on model configuration state.
     *
     * This is necessary because the model is used by the component and
     * different modules that might need different sets of data or different
     * ordering requirements.
     *
     * @param   string  $id  A prefix for the store id.
     *
     * @return  string  A store id.
     *
     * @since   1.6
     */
    protected function getStoreId($id = '')
    {
        // Compile the store id.
        $id .= ':' . $this->getState('filter.search');
        $id .= ':' . $this->getState('filter.access');
        $id .= ':' . $this->getState('filter.published');
        $id .= ':' . $this->getState('filter.category_id');
        $id .= ':' . $this->getState('filter.language');
        $id .= ':' . $this->getState('filter.tag');
        $id .= ':' . $this->getState('filter.level');

        return parent::getStoreId($id);
    }

    /**
     * Build an SQL query to load the list data.
     *
     * @return  \JDatabaseQuery
     *
     * @since   1.6
     */
    protected function getListQuery()
    {
        // Create a new query object.
        $db    = $this->getDatabase();
        $query = $db->getQuery(true);
        $user  = $this->getCurrentUser();

        // Select the required fields from the table.
        $query->select(
            $this->getState(
                'list.select',
                'a.id, a.title, a.alias, a.checked_out, a.checked_out_time, a.catid, a.created, a.created_by, ' .
                'a.hits, a.state, a.access, a.ordering, a.language, a.publish_up, a.publish_down'
            )
        );
        $query->from($db->quoteName('#__weblinks', 'a'));

        // Join over the language
        $query->select($db->quoteName('l.title', 'language_title'))
            ->select($db->quoteName('l.image', 'language_image'))
            ->join('LEFT', $db->quoteName('#__languages', 'l') . ' ON ' . $db->qn('l.lang_code') . ' = ' . $db->qn('a.language'));

        // Join over the users for the checked out user.
        $query->select($db->quoteName('uc.name', 'editor'))
            ->join('LEFT', $db->quoteName('#__users', 'uc') . ' ON ' . $db->qn('uc.id') . ' = ' . $db->qn('a.checked_out'));

        // Join over the asset groups.
        $query->select($db->quoteName('ag.title', 'access_level'))
            ->join('LEFT', $db->quoteName('#__viewlevels', 'ag') . ' ON ' . $db->qn('ag.id') . ' = ' . $db->qn('a.access'));

        // Join over the categories.
        $query->select('c.title AS category_title')
            ->join('LEFT', $db->quoteName('#__categories', 'c') . ' ON ' . $db->qn('c.id') . ' = ' . $db->qn('a.catid'));

        // Join over the associations.
        $assoc = Associations::isEnabled();

        if ($assoc) {
            $query->select('COUNT(asso2.id)>1 AS association')
                ->join('LEFT', $db->quoteName('#__associations', 'asso') . ' ON asso.id = a.id AND asso.context = ' . $db->quote('com_weblinks.item'))
                ->join('LEFT', $db->quoteName('#__associations', 'asso2') . ' ON asso2.key = asso.key')
                ->group('a.id, l.title, l.image, uc.name, ag.title, c.title');
        }

        // Filter by access level.
        if ($access = $this->getState('filter.access')) {
            $query->where($db->quoteName('a.access') . ' = :access')
                ->bind(':access', $access, ParameterType::INTEGER);
        }

        // Implement View Level Access
        if (!$user->authorise('core.admin')) {
            $query->whereIn($db->quoteName('a.access'), $user->getAuthorisedViewLevels());
        }

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

        if (is_numeric($published)) {
            $query->where($db->quoteName('a.state') . ' = :state')
                ->bind(':state', $published, ParameterType::INTEGER);
        } elseif ($published === '') {
            $query->whereIn($db->quoteName('a.state'), [0, 1]);
        }

        // Filter by category.
        $categoryId = $this->getState('filter.category_id');

        if (is_numeric($categoryId)) {
            $query->where($db->quoteName('a.catid') . ' = :catid')
                ->bind(':catid', $categoryId, ParameterType::INTEGER);
        }

        // Filter on the level.
        if ($level = $this->getState('filter.level')) {
            $query->where($db->quoteName('c.level') . ' <= :level')
                ->bind(':level', $level, ParameterType::INTEGER);
        }

        // Filter by search in title
        $search = $this->getState('filter.search');

        if (!empty($search)) {
            if (stripos($search, 'id:') === 0) {
                $search = substr($search, 3);
                $query->where($db->quoteName('a.id') . ' = :id')
                    ->bind(':id', $search, ParameterType::INTEGER);
            } else {
                $search = '%' . str_replace(' ', '%', $db->escape(trim($search), true) . '%');
                $query->where('(' . $db->quoteName('a.title') . ' LIKE :title OR ' . $db->quoteName('a.alias') . ' LIKE :alias)')
                    ->bind(':title', $search)
                    ->bind(':alias', $search);
            }
        }

        // Filter on the language.
        if ($language = $this->getState('filter.language')) {
            $query->where($db->quoteName('a.language') . ' = :language')
                ->bind(':language', $language);
        }

        $tagId = $this->getState('filter.tag');

        // Filter by a single tag.
        if (is_numeric($tagId)) {
            $query->where($db->quoteName('tagmap.tag_id') . ' = :tagId')
                ->bind(':tagId', $tagId, ParameterType::INTEGER)
                ->join(
                    'LEFT',
                    $db->quoteName('#__contentitem_tag_map', 'tagmap')
                    . ' ON ' . $db->quoteName('tagmap.content_item_id') . ' = ' . $db->quoteName('a.id')
                    . ' AND ' . $db->quoteName('tagmap.type_alias') . ' = ' . $db->quote('com_weblinks.weblink')
                );
        }

        // Add the list ordering clause.
        $orderCol  = $this->state->get('list.ordering', 'a.title');
        $orderDirn = $this->state->get('list.direction', 'ASC');

        if ($orderCol == 'a.ordering' || $orderCol == 'category_title') {
            $orderCol = 'c.title ' . $orderDirn . ', a.ordering';
        }

        $query->order($db->escape($orderCol . ' ' . $orderDirn));

        return $query;
    }
}