<?php // $Id: $
/*
==============================================================================
	Dokeos - elearning and course management software

	Copyright (c) 2008 Dokeos Latinoamerica SAC
	Copyright (c) 2006 Dokeos SPRL
	Copyright (c) 2006 Ghent University (UGent)
	Copyright (c) various contributors

	For a full list of contributors, see "credits.txt".
	The full license can be read in "license.txt".

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	See the GNU General Public License for more details.

	Contact address: Dokeos, rue du Corbeau, 108, B-1030 Brussels, Belgium
	Mail: info@dokeos.com
==============================================================================
*/
$language_file[] = 'gradebook';
//$cidReset= true;
require_once ('../inc/global.inc.php');
require_once ('lib/be.inc.php');
require_once ('lib/gradebook_functions.inc.php');
require_once ('lib/fe/displaygradebook.php');
require_once ('lib/fe/evalform.class.php');
require_once ('lib/fe/dataform.class.php');
require_once (api_get_path(LIBRARY_PATH) . 'fileManage.lib.php');
require_once (api_get_path(LIBRARY_PATH) . 'export.lib.inc.php');
require_once (api_get_path(LIBRARY_PATH) . 'import.lib.php');
require_once ('lib/results_data_generator.class.php');
require_once ('lib/fe/resulttable.class.php');
require_once ('lib/fe/exportgradebook.php');
require_once ('lib/scoredisplay.class.php');
require_once (api_get_path(LIBRARY_PATH).'ezpdf/class.ezpdf.php');
api_block_anonymous_users();
block_students();

$interbreadcrumb[]= array (
	'url' => $_SESSION['gradebook_dest'],
	'name' => get_lang('Gradebook'
));

//load the evaluation & category
$select_eval=Security::remove_XSS($_GET['selecteval']);
if (empty($select_eval)) {
	api_not_allowed();
}
$displayscore = Scoredisplay :: instance();
$eval= Evaluation :: load($select_eval);
$overwritescore= 0;
if ($eval[0]->get_category_id() < 0) {
	// if category id is negative, then the evaluation's origin is a link
	$link= LinkFactory :: get_evaluation_link($eval[0]->get_id());
	$currentcat= Category :: load($link->get_category_id());
} else
	$currentcat= Category :: load($eval[0]->get_category_id());
	//load the result with the evaluation id
function overwritescore($resid, $importscore, $eval_max) {
	$result= Result :: load($resid);
	if ($importscore > $eval_max) {
		header('Location: gradebook_view_result.php?selecteval=' .Security::remove_XSS($_GET['selecteval']) . '&overwritemax=');
		exit;
	}
	$result[0]->set_score($importscore);
	$result[0]->save();
	unset ($result);
}
if (isset ($_GET['selecteval'])) {
	$allresults= Result :: load(null,null,$select_eval);
	$iscourse= $currentcat[0]->get_course_code() == null ? 1 : 0;
}
/**
 * XML-parser: handle start of element
 */
function element_start($parser, $data) {
global $user;
global $current_tag;
	switch ($data) {
	case 'Result' :
		$user= array ();
		break;
	default :
		$current_tag= $data;
	}
}
/**
 * XML-parser: handle end of element
 */
function element_end($parser, $data) {
global $user;
global $users;
global $current_value;
	switch ($data) {
	case 'Result' :
		$users[]= $user;
		break;
	default :
		$user[$data]= $current_value;
		break;
	}
}
/**
 * XML-parser: handle character data
 */
function character_data($parser, $data) {
global $current_value;
$current_value= $data;
}
/**
 * Read the XML-file
 * @param string $file Path to the XML-file
 * @return array All userinformation read from the file
 */
function parse_xml_data($file) {
	global $current_tag;
	global $current_value;
	global $user;
	global $users;
		$users= array ();
		$parser= xml_parser_create();
		xml_set_element_handler($parser, 'element_start', 'element_end');
		xml_set_character_data_handler($parser, "character_data");
		xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, false);
		xml_parse($parser, file_get_contents($file));
		xml_parser_free($parser);
		return $users;
}
if (isset ($_GET['editres'])) {
	$edit_res_xml=Security::remove_XSS($_GET['editres']);
	$select_eval_edit=Security::remove_XSS($_GET['selecteval']);
	$resultedit= Result :: load($edit_res_xml);
	$edit_res_form= new EvalForm(EvalForm :: TYPE_RESULT_EDIT, $eval[0], $resultedit[0], 'edit_result_form', null, api_get_self() . '?editres=' . $resultedit[0]->get_id() . '&selecteval=' .$select_eval_edit);
	if ($edit_res_form->validate()) {
	
		$values= $edit_res_form->exportValues();
		$result= new Result();
		$resultlog=new Result();
		$resultlog->add_result__log($values['hid_user_id'],$select_eval_edit);
		$result->set_id($edit_res_xml);
		$result->set_user_id($values['hid_user_id']);
		$result->set_evaluation_id($select_eval_edit);
		$row_value=isset($values['score']) ? (int)$values['score'] : 0 ;
	if ((!empty ($row_value)) || ($row_value == 0)) {
		$result->set_score($row_value);		
	}
		$result->save();
		unset ($result);
		header('Location: gradebook_view_result.php?selecteval=' . $select_eval_edit . '&editresmessage=');
		exit;
	}
}
if (isset ($_GET['import'])) {
$interbreadcrumb[]= array (
	'url' => 'gradebook_view_result.php?selecteval=' . Security::remove_XSS($_GET['selecteval']),
	'name' => get_lang('ViewResult'
));
$import_result_form = new DataForm(DataForm :: TYPE_IMPORT, 'import_result_form', null, api_get_self() . '?import=&selecteval=' . $_GET['selecteval']);
if (!$import_result_form->validate()) {
	Display :: display_header(get_lang('Import'));	
}

if ($_POST['formSent'] ) {
	if (!empty ($_FILES['import_file']['name'])) {
		$values= $import_result_form->exportValues();
		$file_type= $_POST['file_type'];
		$file_name= $_FILES['import_file']['tmp_name'];
		if ($file_type == 'csv') {
			$results= Import :: csv_to_array($file_name);
		} else {
			$results= parse_xml_data($file_name);
		}
		$nr_results_added= 0;
		foreach ($results as $index => $importedresult) {
			//check username & score
			$added= '0';
			foreach ($allresults as $allresult) {
				if (($importedresult['user_id'] == $allresult->get_user_id())) {
					if ($importedresult['score'] != $allresult->get_score()) {
						if (!isset ($values['overwrite'])) {
							header('Location: gradebook_view_result.php?selecteval=' . Security::remove_XSS($_GET['selecteval']) . '&import_score_error=' . $importedresult['user_id']);
							exit;
							break;
						} else {
							overwritescore($allresult->get_id(), $importedresult['score'], $eval[0]->get_max());
							$overwritescore++;
							$added= '1';
						}
					} else {
						$added= '1';
					}
						
				}
			}
			if ($importedresult['user_id'] == null) {
				header('Location: gradebook_view_result.php?selecteval=' . Security::remove_XSS($_GET['selecteval']) . '&incorrectdata=');
				exit;
			}
			$userinfo= get_user_info_from_id($importedresult['user_id']);
			if ($userinfo['lastname'] != $importedresult['lastname'] || $userinfo['firstname'] != $importedresult['firstname'] || $userinfo['official_code'] != $importedresult['official_code']) {
				if (!isset ($values['ignoreerrors'])) {
					header('Location: gradebook_view_result.php?selecteval=' .Security::remove_XSS($_GET['selecteval']) . '&import_user_error=' . $importedresult['user_id']);
					exit;
				}
			}
			if ($added != '1') {
				if ($importedresult['score'] > $eval[0]->get_max()) {
					header('Location: gradebook_view_result.php?selecteval=' .Security::remove_XSS($_GET['selecteval']) . '&overwritemax=');
					exit;
				}
				$result= new Result();
				$result->set_user_id($importedresult['user_id']);
				if (!empty ($importedresult['score'])) {
					$result->set_score($importedresult['score']);
				}
				if (!empty ($importedresult['date'])) {
					$result->set_date(strtotime($importedresult['date']));
				} else {
					$result->set_date(time());
				}
				$result->set_evaluation_id($_GET['selecteval']);
				$result->add();
				$nr_results_added++;
			}
		}
	} else {
		header('Location: ' . api_get_self() . '?import=&selecteval=' . Security::remove_XSS($_GET['selecteval']) . '&importnofile=');
		exit;
	}
	if ($overwritescore != 0) {
		header('Location: ' . api_get_self() . '?selecteval=' . Security::remove_XSS($_GET['selecteval']) . '&importoverwritescore=' . $overwritescore);
		exit;
	}
	if ($nr_results_added == 0) {
		header('Location: ' . api_get_self() . '?selecteval=' . Security::remove_XSS($_GET['selecteval']) . '&nothingadded=');
		exit;
	}
	header('Location: ' . api_get_self() . '?selecteval=' . Security::remove_XSS($_GET['selecteval']) . '&importok=');
	exit;
	}
}
if (isset ($_GET['export'])) {
$interbreadcrumb[]= array (
	'url' => 'gradebook_view_result.php?selecteval=' . Security::remove_XSS($_GET['selecteval']),
	'name' => get_lang('ViewResult'
));
$export_result_form= new DataForm(DataForm :: TYPE_EXPORT, 'export_result_form', null, api_get_self() . '?export=&selecteval=' . $_GET['selecteval'], '_blank');
if (!$export_result_form->validate()) {
	Display :: display_header(get_lang('Export'));	
}

if ($export_result_form->validate()) {
	$export= $export_result_form->exportValues();
	$file_type= $export['file_type'];
	$filename= 'export_results_' . date('Y-m-d_H-i-s');
	$results= Result :: load(null, null, Security::remove_XSS($_GET['selecteval']));
	$data= array (); //when file type is csv, add a header to the output file
	if ($file_type == 'csv') {
		$alldata[]= array (
			'user_id',
			'official_code',
			'lastname',
			'firstname',
			'score',
			'date'
		);
	}
	if ($file_type == 'pdf') {
		if (($eval[0]->has_results())) {
			$score= $eval[0]->calc_score();
			if ($score != null) {
				$average= get_lang('Average') . ' : ' . round(100 * ($score[0] / $score[1]),2) . ' %';				
			}
		}
		if ($eval[0]->get_course_code() == null) {
			$course= get_lang('CourseIndependent');
		} else {
			$course= get_course_name_from_code($eval[0]->get_course_code());			
		}

		$pdf= new Cezpdf();
		$pdf->selectFont(api_get_path(LIBRARY_PATH).'ezpdf/fonts/Courier.afm');
		$pdf->ezSetMargins(30, 30, 50, 30);
		$pdf->ezSetY(800);
		$pdf->ezText(get_lang('EvaluationName') . ' : ' . $eval[0]->get_name() . ' (' . date('j/n/Y g:i', $eval[0]->get_date()) . ')', 12, array (
			'justification' => 'left'
		));
		$pdf->ezText(get_lang('Description') . ' : ' . $eval[0]->get_description());
		$pdf->ezText(get_lang('Course') . ' : ' . $course, 12, array (
			'justification' => 'left'
		));
		$pdf->ezText(get_lang('Weight') . ' : ' . $eval[0]->get_weight(), 12, array (
			'justification' => 'left'
		));
		$pdf->ezText(get_lang('Max') . ' : ' . $eval[0]->get_max(), 12, array (
			'justification' => 'left'
		));
		$pdf->ezText($average, 12, array (
			'justification' => 'left'
		));
		
		$datagen = new ResultsDataGenerator ($eval[0],$allresults);
		$data_array = $datagen->get_data(ResultsDataGenerator :: RDG_SORT_LASTNAME,0,null,true);	
		$newarray = array();
		foreach ($data_array as $data) {
			$newitem = array();
			$newitem[] = $data['lastname'];
			$newitem[] = $data['firstname'];
			$newitem[] = $data['score'];
			if ($displayscore->is_custom())
				$newitem[] = $data['display'];
			$newarray[] = $newitem;
		}
		$pdf->ezSetY(650);
		if ($displayscore->is_custom()) {
			$header_names = array(get_lang('LastName'),get_lang('FirstName'),get_lang('Score'),get_lang('Display'));			
		}else {
			$header_names = array(get_lang('LastName'),get_lang('FirstName'),get_lang('Score'));
		}
			
		$pdf->ezTable($newarray,$header_names,'',array('showHeadings'=>1,'shaded'=>1,'showLines'=>1,'rowGap'=>3,'width'=> 500));
		$pdf->ezStream();
		exit;
	}
	foreach ($results as $result) {
		$userinfo= get_user_info_from_id($result->get_user_id());
		$data['user_id']= $result->get_user_id();
		$data['official_code']= $userinfo['official_code'];
		$data['lastname']= $userinfo['lastname'];
		$data['firstname']= $userinfo['firstname'];
		$data['score']= $result->get_score();
		$data['date']= date('Y-n-j g:i', $result->get_date());
		$alldata[]= $data;
	}
	switch ($file_type) {
		case 'xml' :
			Export :: export_table_xml($alldata, $filename, 'Result', 'XMLResults');
			break;
		case 'csv' :
			Export :: export_table_csv($alldata, $filename);
			break;
		}
	}
}
if (isset ($_GET['resultdelete'])) {
	$result= Result :: load($_GET['resultdelete']);
	$result[0]->delete();
	header('Location: gradebook_view_result.php?deleteresult=&selecteval=' .Security::remove_XSS($_GET['selecteval']));
	exit;
}
if (isset ($_POST['action'])) {
	$number_of_selected_items= count($_POST['id']);
	if ($number_of_selected_items == '0') {
		Display :: display_warning_message(get_lang('NoItemsSelected'),false);		
	} else {
	switch ($_POST['action']) {
		case 'delete' :
			$number_of_deleted_results= 0;
			foreach ($_POST['id'] as $indexstr) {
				$result= Result :: load($indexstr);
				$result[0]->delete();
				$number_of_deleted_results++;
			}
			header('Location: gradebook_view_result.php?massdelete=&selecteval=' .Security::remove_XSS($_GET['selecteval']));
			exit;
			break;
		}
	}
} // TODO - what if selecteval not set ?
$addparams= array (
'selecteval' => $eval[0]->get_id());
if (isset ($_GET['print'])) {
	$datagen = new ResultsDataGenerator ($eval[0],$allresults);
	$data_array = $datagen->get_data(ResultsDataGenerator :: RDG_SORT_LASTNAME,0,null,true);	
		if ($displayscore->is_custom()) {
			$header_names = array(get_lang('LastName'),get_lang('FirstName'),get_lang('Score'),get_lang('Display'));			
		}else {
			$header_names = array(get_lang('LastName'),get_lang('FirstName'),get_lang('Score'));			
		}
	$newarray = array();
	foreach ($data_array as $data) {
		$newarray[] = array_slice($data, 2);			
	}
	echo print_table($newarray, $header_names,get_lang('ViewResult'), $eval[0]->get_name());
	exit;
} else
	$resulttable= new ResultTable($eval[0], $allresults, $iscourse, $addparams);
	$htmlHeadXtra[]= '<script type="text/javascript">
function confirmationuser ()
{
if (confirm("' . get_lang('DeleteUser') . '?"))
	{return true;}
else
	{return false;}
}
function confirmationall ()
{
if (confirm("' . get_lang('DeleteAll') . '?"))
	{return true;}
else
	{return false;}
}
</script>';
if (isset ($_GET['deleteall'])) {
	$eval[0]->delete_results();
	header('Location: gradebook_view_result.php?allresdeleted=&selecteval=' . Security::remove_XSS($_GET['selecteval']));
	exit;
}
if ((!isset ($_GET['export'])) && (!isset ($_GET['import']))) {

	if (!isset($_GET['selectcat'])) {
		$interbreadcrumb[]= array (
		'url' => $_SESSION['gradebook_dest'].'?selectcat=' .$currentcat[0]->get_id(),
		'name' => get_lang('Details')
		  );
	}	
	$interbreadcrumb[]= array (
	'url' => 'gradebook_view_result.php'.'?selecteval='.Security::remove_XSS($_GET['selecteval']),
	'name' => get_lang('ViewResult'
	));
	
	Display :: display_header('');	
}
if (isset ($_GET['addresultnostudents'])) {
	Display :: display_warning_message(get_lang('AddResultNoStudents'),false);
}

if (isset ($_GET['editresmessage'])) {
	Display :: display_confirmation_message(get_lang('ResultEdited'),false);
}

if (isset ($_GET['addresult'])) {
	Display :: display_confirmation_message(get_lang('ResultAdded'),false);
}

if (isset ($_GET['adduser'])) {
	Display :: display_confirmation_message(get_lang('UserAdded'),false);
}

if (isset ($_GET['deleteresult'])) {
	Display :: display_confirmation_message(get_lang('ResultDeleted'),false);
}

if (isset ($_GET['editallresults'])) {
	Display :: display_confirmation_message(get_lang('AllResultsEdited'),false);
}

if (isset ($_GET['importok'])) {
	Display :: display_confirmation_message(get_lang('FileUploadComplete'),false);
}

if (isset ($_GET['importnofile'])) {
	Display :: display_warning_message(get_lang('ImportNoFile'),false);
}

if (isset ($_GET['incorrectdata'])) {
	Display :: display_warning_message(get_lang('IncorrectData'),false);
}
if (isset ($_GET['nothingadded'])) {
	Display :: display_warning_message(get_lang('ProblemUploadingFile'),false);
}
if (isset ($_GET['massdelete'])) {
	Display :: display_confirmation_message(get_lang('ResultsDeleted'),false);
}
if (isset ($_GET['nouser'])) {
	Display :: display_warning_message(get_lang('NoUser'),false);
}
if (isset ($_GET['overwritemax'])) {
	Display :: display_warning_message(get_lang('OverWriteMax'),false);
}
if (isset ($_GET['importoverwritescore'])) {
	Display :: display_confirmation_message(get_lang('ImportOverWriteScore') . ' ' . $_GET['importoverwritescore']);
}

if (isset ($_GET['import_user_error'])) {
	$userinfo= get_user_info_from_id($_GET['import_user_error']);
	Display :: display_warning_message(get_lang('UserInfoDoesNotMatch') . ' ' . $userinfo['lastname'] . ' ' . $userinfo['firstname']);
}
if (isset ($_GET['allresdeleted'])) {
	Display :: display_confirmation_message(get_lang('AllResultDeleted'));
}

if (isset ($_GET['import_score_error'])) {
	$userinfo= get_user_info_from_id($_GET['import_score_error']);
	Display :: display_warning_message(get_lang('ScoreDoesNotMatch') . ' ' . $userinfo['lastname'] . ' ' . $userinfo['firstname']);
}
if ($file_type == null) { //show the result header
		if (isset ($export_result_form) && !(isset ($edit_res_form))) {
		echo '<div class ="normal-message">';
		echo $export_result_form->display();
		echo '</div>';
		DisplayGradebook :: display_header_result($eval[0], $currentcat[0]->get_id(), 1);
} else {
		if (isset ($import_result_form)){
			echo '<div class ="normal-message">';
			echo $import_result_form->display();
			echo '</div>';
		}
		if (isset ($edit_res_form)) {
			Display :: display_normal_message($edit_res_form->toHtml(),false);
		}
		DisplayGradebook :: display_header_result($eval[0], $currentcat[0]->get_id(), 1);
	}
	$resulttable->display();
	Display :: display_footer();
}