<?php
//////////////////////////////////////////////////////////////////////////////////////////////
// lastnames.class.php
//
//                                        by Fumi.Iseki
//

if (!defined('CMS_MODULE_PATH')) exit();

require_once(realpath(CMS_MODULE_PATH.'/include/modlos.func.php'));


class  LastNames
{
    var $action_url;
    var $course_id   = 0;

    var $lastnames          = array();
    var $lastnames_active   = array();
    var $lastnames_inactive = array();

    var $select_active      = array();        // move to active
    var $select_inactive    = array();        // move to inactive
    var $addname;

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


    function  __construct($course_id)
    {
        $this->course_id = $course_id;
        $this->hasPermit = hasModlosPermit($course_id);
        if (!$this->hasPermit) {
            $this->hasError = true;
            $this->errorMsg[] = get_string('modlos_access_forbidden', 'block_modlos');
            return;
        }
        $this->action_url = CMS_MODULE_URL.'/admin/actions/lastnames.php';
    }


    function  execute()
    {
        global $DB;

        $objs = $DB->get_records('modlos_lastnames');
        if (is_array($objs)) {
            foreach($objs as $name) {
                $this->lastnames[$name->lastname] = $name->state;
            }
        }

        // Form 
        if (data_submitted()) {
            if (!$this->hasPermit) {
                $this->hasError = true;
                $this->errorMsg[] = get_string('modlos_access_forbidden', 'block_modlos');
                return false;
            }

            if (!confirm_sesskey()) {
                $this->hasError = true;
                $this->errorMsg[] = get_string('modlos_sesskey_error', 'block_modlos');
                return false;
            }

            $add = optional_param('submit_add',    '', PARAM_TEXT);
            $lft = optional_param('submit_left',   '', PARAM_TEXT);
            $rgt = optional_param('submit_right',  '', PARAM_TEXT);
            $del = optional_param('submit_delete', '', PARAM_TEXT);

            $this->select_inactive = optional_param_array('select_left',  array(), PARAM_TEXT);
            $this->select_active   = optional_param_array('select_right', array(), PARAM_TEXT);
            $this->addname         = optional_param('addname', '', PARAM_TEXT);

            if     ($add!='') $this->action_add();
            elseif ($lft!='') $this->action_move_to_left();
            elseif ($rgt!='') $this->action_move_to_right();
            elseif ($del!='') $this->action_delete();
        }
    }


    function  print_page() 
    {
        global $CFG;

        foreach ($this->lastnames as $lastname=>$state) {
            if ($state==AVATAR_LASTN_ACTIVE) $this->lastnames_active[]   = $lastname;
            else                             $this->lastnames_inactive[] = $lastname;
        }

        $grid_name        = $CFG->modlos_grid_name;

        $lastnames_ttl  = get_string('modlos_lastnames',     'block_modlos');
        $content        = get_string('modlos_lastnames',     'block_modlos');

        $select_lft        = $this->lastnames_inactive;
        $select_rgt     = $this->lastnames_active;
        $select_lft_ttl = get_string('modlos_candidate_list','block_modlos');
        $select_rgt_ttl = get_string('modlos_active_list',   'block_modlos');

        include(CMS_MODULE_PATH.'/admin/html/lastnames.html');
    }


    function  action_add()
    {
        global $DB;

        if (!isAlphabetNumericSpecial($this->addname)) {
            $this->hasError = true;
            $this->errorMsg[] = get_string('modlos_invalid_lastname', 'block_modlos')." ($this->addname)";
            return;
        }

        $obj = $DB->get_record('modlos_lastnames', array('lastname'=>$this->addname));
        if ($obj!=null) {
            $this->hasError = true;
            $this->errorMsg[] = get_string('modlos_exist_lastname', 'block_modlos')." ($this->addname)";
            return;
        }

        $obj = new stdClass();
        $obj->lastname = $this->addname;
        $obj->state    = AVATAR_LASTN_INACTIVE;
        $DB->insert_record('modlos_lastnames', $obj);
        $this->lastnames[$this->addname] = AVATAR_LASTN_INACTIVE;
    }


    function  action_move_to_left()
    {
        global $DB;

        foreach($this->select_active as $name) {
            $obj = $DB->get_record('modlos_lastnames', array('lastname'=>$name));
            if ($obj==null) {
                if (!$this->hasError) $this->hasError = true;
                $this->errorMsg[] = get_string('modlos_not_exist_lastname', 'block_modlos')." ($name)";
            }
            else {
                $obj->state = AVATAR_LASTN_INACTIVE;
                $DB->update_record('modlos_lastnames', $obj);
                $this->lastnames[$name] = AVATAR_LASTN_INACTIVE;
            }
        }
    }


    function  action_move_to_right()
    {
        global $DB;

        foreach($this->select_inactive as $name) {
            $obj = $DB->get_record('modlos_lastnames', array('lastname'=>$name));
            if ($obj==null) {
                if (!$this->hasError) $this->hasError = true;
                $this->errorMsg[] = get_string('modlos_not_exist_lastname', 'block_modlos')." ($name)";
            }
            else {
                $obj->state = AVATAR_LASTN_ACTIVE;
                $DB->update_record('modlos_lastnames', $obj);
                $this->lastnames[$name] = AVATAR_LASTN_ACTIVE;
            }
        }
    }


    function  action_delete()
    {
        global $DB;

        foreach($this->select_active as $name) {
            $DB->delete_records('modlos_lastnames', array('lastname'=>$name));
            unset($this->lastnames[$name]);
        }

        foreach($this->select_inactive as $name) {
            $DB->delete_records('modlos_lastnames', array('lastname'=>$name));
            unset($this->lastnames[$name]);
        }
    }
}