<?php
//////////////////////////////////////////////////////////////////////////////////////////////
// jbxl_moodle_selector.php for Moodle
//
//                                        by Fumi.Iseki
//

defined('MOODLE_INTERNAL') || die();

$jbxl_moodle_selector_ver = 2013092100;


//
if (defined('JBXL_MOODLE_SELECTOR_VER')) {
    if (JBXL_MOODLE_SELECTOR_VER < $jbxl_moodle_selector_ver) {
        debugging('JBXL_MOODLE_SELECTOR: old version is used. '.JBXL_MOODLE_SELECTOR_VER.' < '.$jbxl_moodle_selector_ver, DEBUG_DEVELOPER);
    }
}
else {

define('JBXL_MOODLE_SELECTOR_VER', $jbxl_moodle_selector_ver);


abstract class  jbxl_id_selector_base
{
    var $include_html = 'jbxl_moodle_selector.html';
    var $action_url   = '';
    var $title_top    = '';
    var $title_left   = 'Left';
    var $title_right  = 'Right';
    var $course_id;

    var $ids          = array();
    var $ids_left     = array();
    var $ids_right    = array();

    var $select_left  = array();        // move to left
    var $select_right = array();        // move to right

    var $hasError = false;
    var $errorMsg = array();


    abstract protected function get_all_ids();                // id=>1(right)/0(left) の配列を返す
    abstract protected function get_record($id);
    abstract protected function set_record($id, $rec);
    abstract protected function set_item_left($rec);
    abstract protected function set_item_right($rec);
    //
    abstract public    function get_name($id);
    abstract public    function sorting(array $ids);


    //
    public function __construct($html, $url, $ltitle, $rtitle) 
    {
        if (!empty($html))   $this->include_html = $html;
        if (!empty($url))    $this->action_url   = $url;
        if (!empty($ltitle)) $this->title_left   = $ltitle;
        if (!empty($rtitle)) $this->title_right  = $rtitle;
    }


    public function jbxl_id_selector_base($html, $url, $ltitle, $rtitle) 
    {
        self::__construct($html, $url, $ltitle, $rtitle);
    }


    public function  execute()
    {
        $this->ids = $this->get_all_ids();
        $course_id = optional_param('courseid', '0', PARAM_INT);

        // Form    
        if ($form_data=data_submitted()) {
            if (!confirm_sesskey()) {
                $this->hasError = true;
                $this->errorMsg[] = 'jbxl_id_selector_base: sesskey error';
                return false;
            }

            $lsubmit = optional_param('submit_left',  '', PARAM_TEXT);
            $rsubmit = optional_param('submit_right', '', PARAM_TEXT);

            if ($lsubmit!='') {
                $this->select_right = $form_data->select_right;
                $this->action_moveto_left();
            }
            elseif ($rsubmit!='') {
                $this->select_left = $form_data->select_left;
                $this->action_moveto_right();
            }
        }
    }


    public function  print_page() 
    {
        $this->ids = $this->sorting($this->ids);

        foreach ($this->ids as $id=>$right) {
            if ($id>0) {
                if ($right) $this->ids_right[] = $id;
                else        $this->ids_left[]  = $id;
            }
        }

        $items_left  = $this->ids_left;
        $items_right = $this->ids_right;
        include($this->include_html);
    }


    protected function  action_moveto_right()
    {
        foreach($this->select_left as $id) {
            $rec = $this->get_record($id);
            $rec = $this->set_item_right($rec);
            $this->set_record($id, $rec);
            $this->ids[$id] = true;
        }
    }


    protected function  action_moveto_left()
    {
        foreach($this->select_right as $id) {
            $rec = $this->get_record($id);
            $rec = $this->set_item_left($rec);
            $this->set_record($id, $rec);
            $this->ids[$id] = false;
        }
    }


    public function  set_title($title)
    {
        $this->title_top = $title;
    }
}


}       // !defined('JBXL_MOODLE_SELECTOR_VER')