<?php // $Id: delete.php,v 1.3 2006/02/08 18:39:15 dlnsk Exp $

// Modified by Fumi.Iseki 	2007/03/23
// 							2013/04/15


require_once('../../config.php');	
require_once($CFG->libdir.'/blocklib.php');
require_once(dirname(__FILE__).'/locallib.php');


$courseid = required_param('course', PARAM_INTEGER);  // Course id
$classid  = optional_param('class', 0, PARAM_INTEGER);
$confirm  = optional_param('confirm','', PARAM_INTEGER);
$action   = optional_param('action','',  PARAM_ALPHA);
$submit   = optional_param('submit','',  PARAM_TEXT);

if (($formdata = data_submitted()) and !confirm_sesskey()) {
	print_error('invalidsesskey');
}

$urlparams['course'] = $courseid;
$urlparams['class']  = $classid;
if ($confirm) $urlparams['confirm'] = $confirm;
if ($action)  $urlparams['action']  = $action;
$PAGE->set_url('/blocks/autoattend/delete.php', $urlparams);

$wwwBlock = $CFG->wwwroot.'/blocks/autoattend';
$wwwMyURL = $wwwBlock.'/delete.php';

//
if (isset($formdata->cancel)) {
	redirect('index.php?course='.$courseid);
}

$course = $DB->get_record('course', array('id'=>$courseid));
if (!$course) {
	print_error('courseidwrong', 'block_autoattend');
}

require_login($course->id);

$context = jbxl_get_course_context($course->id);
$isteacher = jbxl_is_teacher($USER->id, $context);
if (!$isteacher) {
	print_error('notaccessnoteacher', 'block_autoattend');
}

$user = $DB->get_record('user', array('id'=>$USER->id));
if (!$user) {
	print_error('nosuchuser', 'block_autoattend');
}


// Delete Record Check
foreach($_POST as $key => $value) {
	if (substr($key,0,6) == 'delete') {
  		$delid = substr($key, 6, strlen($key)-6);
		if (is_numeric($delid)) {
			if ($att = $DB->get_record('autoattend_sessions', array('id'=>$delid))) {
   				$deletes[$delid]  = $att;
			}
		}
 	}
}

if (empty($deletes)) {
	redirect('index.php?course='.$course->id.'&amp;class='.$classid);
}


// Print Header
if ($course->category) {
	$title = get_string('delete').' '.get_string('session','block_autoattend');
} 
else {
	$title = $course->shortname.': '.get_string('autoattend','block_autoattend');
}

$PAGE->set_title($title);
$PAGE->set_heading($course->fullname);
$PAGE->set_cacheable(true);
$PAGE->set_button('&nbsp;');
//$PAGE->set_headingmenu();

echo $OUTPUT->header();


// Delete!!!
if (!empty($confirm)) {
	if (!empty($submit) && $submit==get_string('deleteok','block_autoattend')) {
		foreach($deletes as $key => $value) {
			$DB->delete_records('autoattend_students', array('attsid'=>$key));
			$DB->delete_records('autoattend_sessions', array('id'=>$key));
			$sdate = $deletes[$key]->sessdate;
			$stime = $deletes[$key]->starttime - $sdate;
			// for Log
			$str_sdate = strftime(get_string('strftimedmyw',   'block_autoattend'), $sdate + $TIME_OFFSET);
			$str_stime = strftime(get_string('strftimehourmin','block_autoattend'), $stime + $TIME_OFFSET);
			$loginfo = 'date='.$str_sdate.',time='.$str_stime.',method='.$deletes[$key]->method;
			$event = autoattend_get_event($context, 'delete', '', $loginfo);
			jbxl_add_to_log($event);
		}
		autoattend_update_grades($course->id);
		redirect('index.php?course='.$course->id.'&amp;class='.$classid, get_string('sessiondeleted','block_autoattend'), 1);
	}
}

$use_summertime = autoattend_use_summertime($course->id);

//// Table
include('html/delete.html');

echo $OUTPUT->footer($course);