<?php

// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
//
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id$

//this script may only be included - so its better to die if called directly.
if (strpos($_SERVER['SCRIPT_NAME'], basename(__FILE__)) !== false) {
    header('location: index.php');
    exit;
}

/**
 * Class Table_Check
 * This is a public class for checking necessary preferences or tablesorter status
 *
 * @package Tiki
 * @subpackage Table
 */
class Table_Check
{
    public static $dir = [0 => 'asc', 1 => 'desc'];

    /**
     * Sets values used in setting tablesorter code
     *
     * @param $tableid
     * @param bool $ajax
     * @return mixed
     * @throws Exception
     */
    public static function setVars($tableid, $ajax = false)
    {
        $ret['enabled'] = self::isEnabled($ajax);
        $ret['ajax'] = self::isAjaxCall();
        static $iid = 0;
        ++$iid;
        $ret['tableid'] = $tableid . $iid;
        $smarty = TikiLib::lib('smarty');
        $smarty->assign('ts', $ret);
        return $ret;
    }


    /**
     * Checks to see if necessary preferences are set to allow tablesorter to be used either with or without ajax
     *
     * @param bool $ajax    if set to true will check that appropriate preference is set to be able to use ajax
     * @return bool
     */
    public static function isEnabled($ajax = false)
    {
        global $prefs;
        if ($prefs['javascript_enabled'] === 'y' && $prefs['feature_jquery_tablesorter'] === 'y') {
            if ($ajax === true) {
                if ($prefs['feature_ajax'] === 'y') {
                    return true;
                } else {
                    return false;
                }
            } else {
                return true;
            }
        } else {
            return false;
        }
    }

    /**
     * Checks to see whether the file has been accessed through a tablesorter ajax call
     * @return bool
     */
    public static function isAjaxCall()
    {
        if (isset($_REQUEST['tsAjax']) && $_REQUEST['tsAjax'] === 'y') {
            return true;
        } else {
            return false;
        }
    }

    /**
     * Checks to see whether the file has been accessed through a tablesorter ajax call with a sort or filter
     * @return bool
     */
    public static function isFilterOrSort()
    {
        if (
            self::isAjaxCall() && ((! empty($_REQUEST['filter']) && is_array($_REQUEST['filter'])
                || (! empty($_REQUEST['sort']) && is_array($_REQUEST['sort']))))
        ) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * Checks to see whether the file has been accessed through a tablesorter ajax call with a filter
     * @return bool
     */
    public static function isFilter()
    {
        if (self::isAjaxCall() && ! empty($_REQUEST['filter']) && is_array($_REQUEST['filter'])) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * Checks to see whether the file has been accessed through a tablesorter ajax call with a sort
     * @return bool
     */
    public static function isSort()
    {
        if (self::isAjaxCall() && ! empty($_REQUEST['sort']) && is_array($_REQUEST['sort'])) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * Utility to convert string entered by user for a parameter setting to an array
     * @param $paramstr
     * @return array
     */
    public static function parseParam($paramstr)
    {
        if (! empty($paramstr)) {
            $ret = explode('|', $paramstr);
            foreach ($ret as $key => $pipe) {
                $key = trim($key);
                $pipe = trim($pipe);
                $ret[$key] = strpos($pipe, ';') !== false ? explode(';', $pipe) : $pipe;
                if (! is_array($ret[$key])) {
                    if (strpos($ret[$key], ':') !== false) {
                        $colon = explode(':', $ret[$key]);
                        unset($ret[$key]);
                        if (trim($colon[1]) == 'nofilter') {
                            $ret[$key][$colon[0]] = false;
                        } else {
                            $ret[$key][$colon[0]] = trim($colon[1]);
                        }
                    }
                } elseif (is_array($ret[$key])) {
                    foreach ($ret[$key] as $key2 => $subparam) {
                        $key2 = trim($key);
                        $subparam = trim($subparam);
                        if (strpos($subparam, ':') !== false) {
                            $colon = explode(':', $subparam);
                            unset($ret[$key][$key2]);
                            if (in_array($colon[0], ['expand', 'option'])) {
                                if (trim($colon[0]) == 'option') {
                                    $colon[0] = 'options';
                                }
                                $ret[$key][$colon[0]][] = trim($colon[1]);
                            } else {
                                $ret[$key][$colon[0]] = trim($colon[1]);
                            }
                        }
                    }
                }
            }
            ksort($ret);
            return $ret;
        } else {
            return $paramstr;
        }
    }
}