chamilo-lms2/main/gradebook/lib/fe/displaygradebook.php

<?php
/* For licensing terms, see /license.txt */
/**
 * Script
 * @package chamilo.gradebook
 */
/**
 * Class
 * @package chamilo.gradebook
 */
class DisplayGradebook
{
	/**
	* Displays the header for the result page containing the navigation tree and links
	* @param $evalobj
	* @param $selectcat
	* @param $shownavbar 1=show navigation bar
	* @param $forpdf only output for pdf file
	*/
	static function display_header_result($evalobj, $selectcat, $page) {
		if (api_is_allowed_to_edit(null, true)) {
			$header = '<div class="actions">';
			if ($page != 'statistics') {
			    $header .= '<a href="'.Security::remove_XSS($_SESSION['gradebook_dest']).'?selectcat=' . $selectcat . '">'. Display::return_icon(('back.png'),get_lang('FolderView'),'',ICON_SIZE_MEDIUM).'</a>';
    			if ($evalobj->get_course_code() == null) {
                    //Disabling code when course code is null see issue #2705
    				//$header .= '<a href="gradebook_add_user.php?selecteval=' . $evalobj->get_id() . '"><img src="../img/add_user_big.gif" alt="' . get_lang('AddStudent') . '" align="absmiddle" /> ' . get_lang('AddStudent') . '</a>';
    			} elseif (!$evalobj->has_results()) {
    				$header .= '<a href="gradebook_add_result.php?selectcat=' . $selectcat . '&selecteval=' . $evalobj->get_id() . '">
    				'.Display::return_icon('evaluation_rate.png',get_lang('AddResult'),'',ICON_SIZE_MEDIUM) . '</a>';
    			}

                if (api_is_platform_admin() || $evalobj->is_locked() == false) {
                    $header .= '<a href="' . api_get_self() . '?&selecteval=' . $evalobj->get_id() . '&import=">'.Display::return_icon('import_evaluation.png',get_lang('ImportResult'),'',ICON_SIZE_MEDIUM) . '</a>';
                }

    			if ($evalobj->has_results()) {
    				$header .= '<a href="' . api_get_self() . '?&selecteval=' . $evalobj->get_id() . '&export=">'.Display::return_icon('export_evaluation.png',get_lang('ExportResult'),'',ICON_SIZE_MEDIUM) . '</a>';

                    if (api_is_platform_admin() || $evalobj->is_locked() == false) {
                        $header .= '<a href="gradebook_edit_result.php?selecteval=' . $evalobj->get_id() .'">'.Display::return_icon('edit.png',get_lang('EditResult'),'',ICON_SIZE_MEDIUM).'</a>';
                        $header .= '<a href="' . api_get_self() . '?&selecteval=' . $evalobj->get_id() . '&deleteall=" onclick="return confirmationall();">'.Display::return_icon('delete.png',get_lang('DeleteResult'),'',ICON_SIZE_MEDIUM).'</a>';
                    }
    			}

    			$header .= '<a href="' . api_get_self() . '?print=&selecteval=' . $evalobj->get_id() . '" target="_blank">'.Display::return_icon('printer.png',get_lang('Print'),'',ICON_SIZE_MEDIUM).'</a>';
			} else {
			    $header .= '<a href="gradebook_view_result.php?selecteval='.Security::remove_XSS($_GET['selecteval']).'"> '.Display::return_icon(('back.png'),get_lang('FolderView'),'',ICON_SIZE_MEDIUM) . '</a>';
			}
			$header .= '</div>';
		}

		if ($evalobj->is_visible() == '1') {
			$visible= get_lang('Yes');
		} else {
			$visible= get_lang('No');
		}

		$scoredisplay = ScoreDisplay :: instance();

        $student_score = '';

		if (($evalobj->has_results())){ // TODO this check needed ?
			$score = $evalobj->calc_score();

			if ($score != null) {
                $average= get_lang('Average') . ' :<b> ' .$scoredisplay->display_score($score, SCORE_AVERAGE) . '</b>';
                $student_score = $evalobj->calc_score(api_get_user_id());
                $student_score = Display::tag('h3', get_lang('Score').': '.$scoredisplay->display_score($student_score, SCORE_DIV_PERCENT));
            }
		}

		if (!$evalobj->get_description() == '') {
			$description= get_lang('Description') . ' :<b> ' . $evalobj->get_description() . '</b><br>';
		}

		if ($evalobj->get_course_code() == null) {
			$course= get_lang('CourseIndependent');
		} else {
			$course= get_course_name_from_code($evalobj->get_course_code());
		}

		$evalinfo= '<table width="100%" border="0"><tr><td>';
		$evalinfo .= '<h2>'.$evalobj->get_name().'</h2><hr>';
		$evalinfo .= $description;
		$evalinfo .= get_lang('Course') . ' :<b> ' . $course . '</b><br />';
		//'<br>' . get_lang('Weight') . ' :<b> ' . $evalobj->get_weight() . '</b><br>' . get_lang('Visible') . ' :<b> ' . $visible . '</b>
        $evalinfo .=  get_lang('QualificationNumeric') . ' :<b> ' . $evalobj->get_max() . '</b><br>'.$average;

        if (!api_is_allowed_to_edit()) {
            $evalinfo .= $student_score;
        }

		if (!$evalobj->has_results()) {
			$evalinfo .= '<br /><i>' . get_lang('NoResultsInEvaluation') . '</i>';
		} elseif ($scoredisplay->is_custom() && api_get_self() != '/main/gradebook/gradebook_statistics.php') {
            if (api_is_allowed_to_edit(null, true)) {
                if ($page != 'statistics') {
                    //$evalinfo .= '<br /><br /><a href="gradebook_view_result.php?selecteval='.Security::remove_XSS($_GET['selecteval']).'"> '.Display::return_icon(('evaluation_rate.png'),get_lang('ViewResult'),'',ICON_SIZE_MEDIUM) . '</a>';
                }
            }
        }
        if ($page != 'statistics') {
            if (api_is_allowed_to_edit(null, true)) {
                $evalinfo .= '<br /><a href="gradebook_statistics.php?selecteval='.Security::remove_XSS($_GET['selecteval']).'"> '.Display::return_icon(('statistics.png'),get_lang('ViewStatistics'),'',ICON_SIZE_MEDIUM).'</a>';
            }
        }
        $evalinfo .= '</td><td><img style="float:right; position:relative;" src="../img/tutorial.gif"></td></table>';
		echo $evalinfo;
		echo $header;
	}

	/**
	* Displays the header for the flatview page containing filters
	* @param $catobj
	* @param $showeval
	* @param $showlink
	*/
	function display_header_flatview($catobj, $showeval, $showlink,$simple_search_form) {
		$header= '<table border="0" cellpadding="5">';
		$header .= '<td style="vertical-align: top;"><a href="'.Security::remove_XSS($_SESSION['gradebook_dest']).'?selectcat=' . Security::remove_XSS($_GET['selectcat']) . '">' . Display::return_icon('gradebook.gif') . get_lang('Gradebook') . '</a></td>';
		$header .= '<td style="vertical-align: top;">' . get_lang('FilterCategory') . '</td><td style="vertical-align: top;"><form name="selector"><select name="selectcat" onchange="document.selector.submit()">';
		$cats= Category :: load();
		$tree= $cats[0]->get_tree();
		unset ($cats);
		foreach ($tree as $cat) {
			for ($i= 0; $i < $cat[2]; $i++) {
				$line .= '&mdash;';
			}
			if ($_GET['selectcat'] == $cat[0]) {
				$header .= '<option selected="selected" value=' . $cat[0] . '>' . $line . ' ' . $cat[1] . '</option>';
			} else {
				$header .= '<option value=' . $cat[0] . '>' . $line . ' ' . $cat[1] . '</option>';
			}
			$line= '';
		}
		$header .= '</td></select></form>';
		if (!$catobj->get_id() == '0') {
			$header .= '<td style="vertical-align: top;"><a href="' . api_get_self() . '?selectcat=' . $catobj->get_parent_id() . '"><img src="../img/gradebook.gif" border="0" alt="'.get_lang('Up').'" /></a></td>';
		}
		$header .= '<td style="vertical-align: top;">'.$simple_search_form->toHtml().'</td>';
		$header .= '<td style="vertical-align: top;"><a href="' . api_get_self() . '?exportpdf=&offset='.Security::remove_XSS($_GET['offset']).'&search=' . Security::remove_XSS($_GET['search']).'&selectcat=' . $catobj->get_id() . '"><img src=../img/icons/32/pdf.png alt=' . get_lang('ExportPDF') . '/> ' . get_lang('ExportPDF') . '</a>';
		$header .= '<td style="vertical-align: top;"><a href="' . api_get_self() . '?print=&selectcat=' . $catobj->get_id() . '" target="_blank"><img src="../img/icons/32/printer.png" alt=' . get_lang('Print') . '/> ' . get_lang('Print') . '</a>';
		$header .= '</td></tr></table>';
		if (!$catobj->get_id() == '0') {
			$header .= '<table border="0" cellpadding="5"><tr><td><form name="itemfilter" method="post" action="' . api_get_self() . '?selectcat=' . $catobj->get_id() . '"><input type="checkbox" name="showeval" onclick="document.itemfilter.submit()" ' . (($showeval == '1') ? 'checked' : '') . '>Show Evaluations &nbsp;';
			$header .= '<input type="checkbox" name="showlink" onclick="document.itemfilter.submit()" ' . (($showlink == '1') ? 'checked' : '') . '>'.get_lang('ShowLinks').'</form></td></tr></table>';
		}
		if (isset ($_GET['search'])) {
			$header .= '<b>'.get_lang('SearchResults').' :</b>';
		}
		echo $header;
	}

		/**
	* Displays the header for the flatview page containing filters
	* @param $catobj
	* @param $showeval
	* @param $showlink
	*/
	static function display_header_reduce_flatview($catobj, $showeval, $showlink,$simple_search_form) {
		$header = '<div class="actions">';
        if ($catobj->get_parent_id() == 0) {
            $select_cat = $catobj->get_id();
            $url = Security::remove_XSS($_SESSION['gradebook_dest']);
        } else {
            $select_cat = $catobj->get_parent_id();
            $url = 'gradebook_flatview.php';
        }
        $header .= '<a href="'.$url.'?'.api_get_cidreq().'&selectcat='.$select_cat.'">'. Display::return_icon('back.png',get_lang('FolderView'),'',ICON_SIZE_MEDIUM).'</a>';


		// this MUST be a GET variable not a POST
		if (isset($_GET['show'])) {
			$show=Security::remove_XSS($_GET['show']);
		} else {
			$show='';
		}
		$header .= '<a href="' . api_get_self() . '?export_format=csv&export_report=export_report&selectcat=' . $catobj->get_id() . '">'.Display::return_icon('export_csv.png', get_lang('ExportAsCSV'),'',ICON_SIZE_MEDIUM).'</a>';
		$header .= '<a href="' . api_get_self() . '?export_format=xls&export_report=export_report&selectcat=' . $catobj->get_id() . '">'.Display::return_icon('export_excel.png', get_lang('ExportAsXLS'),'',ICON_SIZE_MEDIUM).'</a>';
		$header .= '<a href="' . api_get_self() . '?export_format=doc&export_report=export_report&selectcat=' . $catobj->get_id() . '">'.Display::return_icon('export_doc.png', get_lang('ExportAsDOC'),'',ICON_SIZE_MEDIUM).'</a>';
		$header .= '<a href="' . api_get_self() . '?print=&selectcat=' . $catobj->get_id() . '" target="_blank">'.Display::return_icon('printer.png', get_lang('Print'),'',ICON_SIZE_MEDIUM).'</a>';
		$header .= '<a href="' . api_get_self() . '?exportpdf=&selectcat=' . $catobj->get_id() . '" >'.Display::return_icon('pdf.png', get_lang('ExportToPDF'),'',ICON_SIZE_MEDIUM).'</a>';
		$header .= '</div>';
		echo $header;
	}

	function display_header_gradebook_per_gradebook($catobj, $showtree, $selectcat, $is_course_admin, $is_platform_admin, $simple_search_form, $show_add_qualification = true, $show_add_link = true) {
		// Student
		$status = CourseManager::get_user_in_course_status(api_get_user_id(), api_get_course_id());
		$objcat = new Category();
		$course_id = CourseManager::get_course_by_category($selectcat);
		$message_resource=$objcat->show_message_resource_delete($course_id);

		if (!$is_course_admin && $status<>1 && $selectcat<>0) {
			$user_id = api_get_user_id();
			$user= api_get_user_info($user_id);

			$catcourse= Category :: load($catobj->get_id());
			$scoredisplay = ScoreDisplay :: instance();
			$scorecourse = $catcourse[0]->calc_score($user_id);

			// generating the total score for a course
			$allevals= $catcourse[0]->get_evaluations($user_id,true);
			$alllinks= $catcourse[0]->get_links($user_id,true);
			$evals_links = array_merge($allevals, $alllinks);
			$item_value=0;
			$item_total=0;
			for ($count=0; $count < count($evals_links); $count++) {
				$item = $evals_links[$count];
				$score = $item->calc_score($user_id);
				$my_score_denom=($score[1]==0) ? 1 : $score[1];
				$item_value+=$score[0]/$my_score_denom*$item->get_weight();
				$item_total+=$item->get_weight();
			}
			$item_value = number_format($item_value, 2, '.', ' ');
			$total_score=array($item_value,$item_total);
			$scorecourse_display = $scoredisplay->display_score($total_score, SCORE_DIV_PERCENT);

			$cattotal = Category :: load(0);
			$scoretotal= $cattotal[0]->calc_score(api_get_user_id());
			$scoretotal_display = (isset($scoretotal) ? $scoredisplay->display_score($scoretotal, SCORE_PERCENT) : get_lang('NoResultsAvailable'));
			$scoreinfo = get_lang('StatsStudent') . ' :<b> '.$user['complete_name'].'</b><br />';
			if ((!$catobj->get_id() == '0') && (!isset ($_GET['studentoverview'])) && (!isset ($_GET['search']))) {
				$scoreinfo.= '<h2>'.get_lang('Total') . ' : ' . $scorecourse_display . '</h2>';
			}
			Display :: display_normal_message($scoreinfo, false);
		}

		// show navigation tree and buttons?
		$header = '<div class="actions"><table border=0>';
		if (($showtree == '1') || (isset ($_GET['studentoverview']))) {
			$header .= '<tr>';
			if (!$selectcat == '0') {
				$header .= '<td style=" "><a href="' . api_get_self() . '?selectcat=' . $catobj->get_parent_id() . '">'.Display::return_icon('back.png',get_lang('BackTo').' '.get_lang('RootCat'),'',ICON_SIZE_MEDIUM).'</a></td>';
			}
			$header .= '<td style=" ">' . get_lang('CurrentCategory') . '</td>' .
							'<td style=" "><form name="selector"><select name="selectcat" onchange="document.selector.submit()">';
			$cats= Category :: load();

			$tree= $cats[0]->get_tree();
			unset ($cats);

			foreach ($tree as $cat) {
				for ($i= 0; $i < $cat[2]; $i++) {
					$line .= '&mdash;';
				}
				$line=isset($line) ? $line : '';
				if (isset($_GET['selectcat']) && $_GET['selectcat'] == $cat[0]) {
					$header .= '<option selected value=' . $cat[0] . '>' . $line . ' ' . $cat[1] . '</option>';
				} else {
					$header .= '<option value=' . $cat[0] . '>' . $line . ' ' . $cat[1] . '</option>';
				}
				$line= '';
			}
			$header .= '</select></form></td>';
			if (!empty($simple_search_form) && $message_resource===false) {
				$header .= '<td style="vertical-align: top;">'.$simple_search_form->toHtml().'</td>';
			} else {
				$header .= '<td></td>';
			}
			if ($is_course_admin && $message_resource===false && $_GET['selectcat']!=0) {
				/*$header .= '<td style="vertical-align: top;"><a href="gradebook_flatview.php?'.api_get_cidreq().'&selectcat=' . $catobj->get_id() . '"><img src="../img/view_list.gif" alt="' . get_lang('FlatView') . '" /> ' . get_lang('FlatView') . '</a>';
				 if ($is_course_admin && $message_resource===false) {
				$header .= '<td style="vertical-align: top;"><a href="gradebook_scoring_system.php?'.api_get_cidreq().'&selectcat=' . $catobj->get_id() .'"><img src="../img/acces_tool.gif" alt="' . get_lang('ScoreEdit') . '" /> ' . get_lang('ScoreEdit') . '</a>';
				}*/
			} elseif (!(isset ($_GET['studentoverview']))) {
				if ( $message_resource===false ) {
					//$header .= '<td style="vertical-align: top;"><a href="'.api_get_self().'?'.api_get_cidreq().'&studentoverview=&selectcat=' . $catobj->get_id() . '"><img src="../img/view_list.gif" alt="' . get_lang('FlatView') . '" /> ' . get_lang('FlatView') . '</a>';
				}
			} else {
				$header .= '<td style="vertical-align: top;"><a href="'.api_get_self().'?'.api_get_cidreq().'&studentoverview=&exportpdf=&selectcat=' . $catobj->get_id() . '" target="_blank"><img src="../img/icons/32/pdf.png" alt="' . get_lang('ExportPDF') . '" /> ' . get_lang('ExportPDF') . '</a>';
			}
			$header .= '</td></tr>';
		}
		$header.='</table></div>';

		// for course admin & platform admin add item buttons are added to the header
		$header .= '<div class="actions">';

		$my_category = $catobj->shows_all_information_an_category($catobj->get_id());
		$user_id     = api_get_user_id();
		$course_code = $my_category['course_code'];
        $courseInfo = api_get_course_info($course_code);
		$status_user = api_get_status_of_user_in_course($user_id, $courseInfo['real_id']);

		//$header .= '<a href="gradebook_add_cat.php?'.api_get_cidreq().'&selectcat=0"><img src="../img/folder_new.gif" alt="' . get_lang('AddGradebook') . '" /></a></td>';

		if (api_is_allowed_to_edit(null, true)) {
			if ($selectcat == '0') {
				if ($show_add_qualification === true) {
				}
				if ($show_add_link) {
					//$header .= '<td><a href="gradebook_add_eval.php?'.api_get_cidreq().'"><img src="../img/filenew.gif" alt="' . get_lang('NewEvaluation') . '" /> ' . get_lang('NewEvaluation') . '</a>';
				}
			} else {
				if ($show_add_qualification === true && $message_resource===false) {
					//$header .= '<a href="gradebook_add_cat.php?'.api_get_cidreq().'&selectcat=' . $catobj->get_id() . '" ><img src="../img/folder_new.gif" alt="' . get_lang('NewSubCategory') . '" align="absmiddle" /> ' . get_lang('NewSubCategory') . '</a></td>';
				}
				$my_category=$catobj->shows_all_information_an_category($catobj->get_id());
				$my_api_cidreq = api_get_cidreq();
				if ($my_api_cidreq=='') {
					$my_api_cidreq='cidReq='.$my_category['course_code'];
				}
				if ($show_add_link && !$message_resource) {
					//$header .= '<td><a href="gradebook_add_eval.php?'.$my_api_cidreq.'&selectcat=' . $catobj->get_id() . '" >'.Display::return_icon('new_evaluation.png', get_lang('NewEvaluation'),'',ICON_SIZE_MEDIUM).'</a>';
					$cats= Category :: load($selectcat);
					if ($cats[0]->get_course_code() != null && !$message_resource) {
						//$header .= '<td><a href="gradebook_add_link.php?'.api_get_cidreq().'&selectcat=' . $catobj->get_id() . '"><img src="../img/link.gif" alt="' . get_lang('MakeLink') . '" align="absmiddle" /> ' . get_lang('MakeLink') . '</a>';
						//$header .= '<td><a href="gradebook_add_link.php?'.$my_api_cidreq.'&selectcat=' . $catobj->get_id() . '">'.Display::return_icon('new_online_evaluation.png', get_lang('MakeLink'),'',ICON_SIZE_MEDIUM).'</a>';

					} else {
					//	$header .= '<td><a href="gradebook_add_link_select_course.php?'.$my_api_cidreq.'&selectcat=' . $catobj->get_id() . '">'.Display::return_icon('new_online_evaluation.png', get_lang('MakeLink'),'',ICON_SIZE_MEDIUM).'</a>';
					}
				}

				if (!$message_resource) {
					$myname = $catobj->shows_all_information_an_category($catobj->get_id());

					$my_course_id=api_get_course_id();
					$my_file= substr($_SESSION['gradebook_dest'],0,5);

					$header .= '<td style="vertical-align: top;"><a href="gradebook_flatview.php?'.$my_api_cidreq.'&selectcat=' . $catobj->get_id() . '">'.Display::return_icon('stats.png', get_lang('FlatView'),'',ICON_SIZE_MEDIUM).'</a>';
					$header .= '<td style="vertical-align: top;"><a href="gradebook_display_certificate.php?'.$my_api_cidreq.'&amp;cat_id='.(int)$_GET['selectcat'].'">'.Display::return_icon('certificate_list.png', get_lang('GradebookSeeListOfStudentsCertificates'),'',ICON_SIZE_MEDIUM).'</a>';

					$visibility_icon    = ($catobj->is_visible() == 0) ? 'invisible' : 'visible';
					$visibility_command = ($catobj->is_visible() == 0) ? 'set_visible' : 'set_invisible';

					//Right icons
					$modify_icons  = '<a href="gradebook_edit_cat.php?editcat='.$catobj->get_id().'&cidReq='.$catobj->get_course_code().'">'.Display::return_icon('edit.png', get_lang('Edit'),'',ICON_SIZE_MEDIUM).'</a>';
					//$modify_icons .= '<a href="../document/document.php?curdirpath=/certificates&'.$my_api_cidreq.'&origin=gradebook&selectcat=' . $catobj->get_id() . '">'.
					//Display::return_icon('certificate.png', get_lang('AttachCertificate'),'',ICON_SIZE_MEDIUM).'</a>';

					//hide or delete are not options available
					//$modify_icons .= '&nbsp;<a  href="' . api_get_self() . '?visiblecat=' . $catobj->get_id() . '&amp;' . $visibility_command . '=&amp;selectcat=0 ">'.Display::return_icon($visibility_icon.'.png', get_lang('Visible'),'',ICON_SIZE_MEDIUM).'</a>';
					if ($catobj->get_name() != api_get_course_id()) {
						$modify_icons .= '&nbsp;<a  href="' . api_get_self() . '?deletecat=' . $catobj->get_id() . '&amp;selectcat=0&amp;cidReq='.$catobj->get_course_code().'" onclick="return confirmation();">'.Display::return_icon('delete.png', get_lang('DeleteAll'),'',ICON_SIZE_MEDIUM).'</a>';
					}
					$header .= Display::div($modify_icons, array('class'=>'right'));

				}
			}
		} elseif (isset ($_GET['search'])) {
			$header .= '<b>'.get_lang('SearchResults').' :</b>';
		}
		$header .= '</div>';
		echo $header;
	}

	/**
	 * Displays the header for the gradebook containing the navigation tree and links
	 * @param category_object $currentcat
	 * @param int $showtree '1' will show the browse tree and naviation buttons
	 * @param boolean $is_course_admin
	 * @param boolean $is_platform_admin
     * @param boolean Whether to show or not the link to add a new qualification (we hide it in case of the course-embedded tool where we have only one calification per course or session)
     * @param boolean Whether to show or not the link to add a new item inside the qualification (we hide it in case of the course-embedded tool where we have only one calification per course or session)
     * @return void Everything is printed on screen upon closing
	 */
	static function display_header_gradebook($catobj, $showtree, $selectcat, $is_course_admin, $is_platform_admin, $simple_search_form, $show_add_qualification = true, $show_add_link = true) {
		//student
		$status = CourseManager::get_user_in_course_status(api_get_user_id(), api_get_course_id());
		$objcat = new Category();
		$course_id = CourseManager::get_course_by_category($selectcat);
		$message_resource = $objcat->show_message_resource_delete($course_id);

        $grade_model_id = $catobj->get_grade_model_id();

        //@todo move these in a function
        $sum_categories_weight_array = array();
        if (isset($catobj) && !empty($catobj)) {
            $categories = Category::load(null, null, null, $catobj->get_id());
            if (!empty($categories)) {
                foreach ($categories as $category) {
                    $sum_categories_weight_array[$category->get_id()] = $category->get_weight();
                }
            } else {
                $sum_categories_weight_array[$catobj->get_id()] = $catobj->get_weight();
            }
        }

		if (!$is_course_admin && $status<>1 && $selectcat<>0) {
			$user_id = api_get_user_id();
			$catcourse	  = Category::load($catobj->get_id());
            $main_weight = $catcourse[0]->get_weight();
			$scoredisplay = ScoreDisplay :: instance();

			// generating the total score for a course
			$allevals= $catcourse[0]->get_evaluations($user_id,true);
			$alllinks= $catcourse[0]->get_links($user_id,true);
			$evals_links = array_merge($allevals, $alllinks);

			$item_value =0;
			$item_total = 0;
            $item_total_value = 0;

			for ($count=0; $count < count($evals_links); $count++) {
				$item           = $evals_links[$count];
				$score          = $item->calc_score($user_id);
                $divide			= ( ($score[1])==0 ) ? 1 : $score[1];

                $sub_cat_percentage = $sum_categories_weight_array[$item->get_category_id()];
                //$item_value     = $score[0]/$divide;
                $item_value     = $score[0]/$divide*$item->get_weight()*$sub_cat_percentage/$main_weight;
                $item_value_total +=$item_value;
			}
            $item_total = $main_weight;

			$total_score = array($item_value_total, $item_total);
			$scorecourse_display = $scoredisplay->display_score($total_score, SCORE_DIV_PERCENT);

			if ((!$catobj->get_id() == '0') && (!isset ($_GET['studentoverview'])) && (!isset ($_GET['search']))) {
				$scoreinfo.= '<h2>'.get_lang('Total') . ' : ' . $scorecourse_display . '</h2>';
			}
			Display :: display_normal_message($scoreinfo, false);
		}

		// show navigation tree and buttons?
		if (($showtree == '1') || (isset ($_GET['studentoverview']))) {
            $header = '<div class="actions"><table>';
			$header .= '<tr>';
			if (!$selectcat == '0') {
				$header .= '<td><a href="' . api_get_self() . '?selectcat=' . $catobj->get_parent_id() . '">'.Display::return_icon('back.png',get_lang('BackTo').' '.get_lang('RootCat'),'',ICON_SIZE_MEDIUM).'</a></td>';
			}
			$header .= '<td>' . get_lang('CurrentCategory') . '</td>' .
					'<td><form name="selector"><select name="selectcat" onchange="document.selector.submit()">';
			$cats= Category :: load();

			$tree= $cats[0]->get_tree();
			unset ($cats);

			foreach ($tree as $cat) {
				for ($i= 0; $i < $cat[2]; $i++) {
					$line .= '&mdash;';
				}
				$line=isset($line) ? $line : '';
				if (isset($_GET['selectcat']) && $_GET['selectcat'] == $cat[0]) {
					$header .= '<option selected value=' . $cat[0] . '>' . $line . ' ' . $cat[1] . '</option>';
				} else {
					$header .= '<option value=' . $cat[0] . '>' . $line . ' ' . $cat[1] . '</option>';
				}
				$line= '';
			}
			$header .= '</select></form></td>';
            if (!empty($simple_search_form) && $message_resource===false) {
			    $header .= '<td style="vertical-align: top;">'.$simple_search_form->toHtml().'</td>';
            } else {
            	$header .= '<td></td>';
            }
			if ($is_course_admin && $message_resource===false && $_GET['selectcat']!=0) {
				/*$header .= '<td style="vertical-align: top;"><a href="gradebook_flatview.php?'.api_get_cidreq().'&selectcat=' . $catobj->get_id() . '"><img src="../img/view_list.gif" alt="' . get_lang('FlatView') . '" /> ' . get_lang('FlatView') . '</a>';
				if ($is_course_admin && $message_resource===false) {
					$header .= '<td style="vertical-align: top;"><a href="gradebook_scoring_system.php?'.api_get_cidreq().'&selectcat=' . $catobj->get_id() .'"><img src="../img/acces_tool.gif" alt="' . get_lang('ScoreEdit') . '" /> ' . get_lang('ScoreEdit') . '</a>';
				}*/
			} elseif (!(isset ($_GET['studentoverview']))) {
				if ( $message_resource===false ) {
					//$header .= '<td style="vertical-align: top;"><a href="'.api_get_self().'?'.api_get_cidreq().'&studentoverview=&selectcat=' . $catobj->get_id() . '"><img src="../img/view_list.gif" alt="' . get_lang('FlatView') . '" /> ' . get_lang('FlatView') . '</a>';
				}
			} else {
				$header .= '<td style="vertical-align: top;"><a href="'.api_get_self().'?'.api_get_cidreq().'&studentoverview=&exportpdf=&selectcat=' . $catobj->get_id() . '" target="_blank">
							<img src="../img/icons/32/pdf.png" alt="' . get_lang('ExportPDF') . '" /> ' . get_lang('ExportPDF') . '</a>';
			}
			$header .= '</td></tr>';
            $header.='</table></div>';
		}

		// for course admin & platform admin add item buttons are added to the header
		$header .= '<div class="actions">';

		$my_category = $catobj->shows_all_information_an_category($catobj->get_id());
		$user_id     = api_get_user_id();

		if (api_is_allowed_to_edit(null, true)) {

            if (empty($grade_model_id) || $grade_model_id == -1) {
                $header .= '<a href="gradebook_add_cat.php?'.api_get_cidreq().'&selectcat='.$catobj->get_id().'">'.Display::return_icon('new_folder.png', get_lang('AddGradebook'), array(), ICON_SIZE_MEDIUM).'</a></td>';
            }

			if ($selectcat == '0') {
                if ($show_add_qualification === true) {
                }
                if ($show_add_link) {
				    //$header .= '<td><a href="gradebook_add_eval.php?'.api_get_cidreq().'"><img src="../img/filenew.gif" alt="' . get_lang('NewEvaluation') . '" /> ' . get_lang('NewEvaluation') . '</a>';
                }
			} else {
                if ($show_add_qualification === true && $message_resource===false) {
    				//$header .= '<a href="gradebook_add_cat.php?'.api_get_cidreq().'&selectcat=' . $catobj->get_id() . '" ><img src="../img/folder_new.gif" alt="' . get_lang('NewSubCategory') . '" align="absmiddle" /> ' . get_lang('NewSubCategory') . '</a></td>';
                }
                $my_category = $catobj->shows_all_information_an_category($catobj->get_id());

				$my_api_cidreq = api_get_cidreq();
				if ($my_api_cidreq=='') {
					$my_api_cidreq='cidReq='.$my_category['course_code'];
				}
                if ($show_add_link && !$message_resource) {
    				$header .= '<td><a href="gradebook_add_eval.php?'.$my_api_cidreq.'&selectcat=' . $catobj->get_id() . '" >'.Display::return_icon('new_evaluation.png', get_lang('NewEvaluation'),'',ICON_SIZE_MEDIUM).'</a>';
                    $cats = Category :: load($selectcat);
                    if ($cats[0]->get_course_code() != null && !$message_resource) {
                        //$header .= '<td><a href="gradebook_add_link.php?'.api_get_cidreq().'&selectcat=' . $catobj->get_id() . '"><img src="../img/link.gif" alt="' . get_lang('MakeLink') . '" align="absmiddle" /> ' . get_lang('MakeLink') . '</a>';
                        $header .= '<td><a href="gradebook_add_link.php?'.$my_api_cidreq.'&selectcat=' . $catobj->get_id() . '">'.Display::return_icon('new_online_evaluation.png', get_lang('MakeLink'),'',ICON_SIZE_MEDIUM).'</a>';
                    } else {
                        $header .= '<td><a href="gradebook_add_link_select_course.php?'.$my_api_cidreq.'&selectcat=' . $catobj->get_id() . '">'.Display::return_icon('new_online_evaluation.png', get_lang('MakeLink'),'',ICON_SIZE_MEDIUM).'</a>';
                    }
                }

                if (!$message_resource) {
                	//$myname = $catobj->shows_all_information_an_category($catobj->get_id());

                	//$my_course_id=api_get_course_id();
                	//$my_file= substr($_SESSION['gradebook_dest'],0,5);

					$header .= '<td style="vertical-align: top;"><a href="gradebook_flatview.php?'.$my_api_cidreq.'&selectcat=' . $catobj->get_id() . '">'.Display::return_icon('stats.png', get_lang('FlatView'),'',ICON_SIZE_MEDIUM).'</a>';
					$header .= '<td style="vertical-align: top;"><a href="gradebook_display_certificate.php?'.$my_api_cidreq.'&amp;cat_id='.(int)$_GET['selectcat'].'">'.Display::return_icon('certificate_list.png', get_lang('GradebookSeeListOfStudentsCertificates'),'',ICON_SIZE_MEDIUM).'</a>';

					//$visibility_icon    = ($catobj->is_visible() == 0) ? 'invisible' : 'visible';
			        //$visibility_command = ($catobj->is_visible() == 0) ? 'set_visible' : 'set_invisible';

					//Right icons

            		$modify_icons  = '<a href="gradebook_edit_cat.php?editcat='.$catobj->get_id().'&amp;cidReq='.$catobj->get_course_code().'">'.Display::return_icon('edit.png', get_lang('Edit'),'',ICON_SIZE_MEDIUM).'</a>';
            		$modify_icons .= '<a href="../document/document.php?curdirpath=/certificates&'.$my_api_cidreq.'&origin=gradebook&selectcat=' . $catobj->get_id() . '">'.
            							Display::return_icon('certificate.png', get_lang('AttachCertificate'),'',ICON_SIZE_MEDIUM).'</a>';

                    if (empty($categories)) {
                        $modify_icons .= '<a href="gradebook_edit_all.php?id_session='.api_get_session_id().'&amp;'.$my_api_cidreq.'&selectcat=' . $catobj->get_id() . '">'.Display::return_icon('percentage.png', get_lang('EditAllWeights'),'',ICON_SIZE_MEDIUM).'</a>';
                    }
		    $score_display_custom = api_get_setting('gradebook_score_display_custom');
            		if (api_get_setting('teachers_can_change_score_settings') == 'true' && $score_display_custom['my_display_custom'] == 'true') {
                        $modify_icons .= '<a href="gradebook_scoring_system.php?'.$my_api_cidreq.'&selectcat=' . $catobj->get_id() .'">'.Display::return_icon('ranking.png', get_lang('ScoreEdit'),'',ICON_SIZE_MEDIUM).'</a>';
                    }
            		$header .= Display::div($modify_icons, array('class'=>'right'));
                }
			}
		} elseif (isset ($_GET['search'])) {
			$header .= '<b>'.get_lang('SearchResults').' :</b>';
		}
		$header .= '</div>';

		echo $header;

		if (api_is_allowed_to_edit(null, true)) {
    	    $weight = ((intval($catobj->get_weight())>0) ? $catobj->get_weight() : 0);
    		$weight            = get_lang('TotalWeight').' : '.$weight;

    		$min_certification = (intval($catobj->get_certificate_min_score()>0) ? $catobj->get_certificate_min_score() : 0);
    		$min_certification = get_lang('CertificateMinScore').' : '.$min_certification;
            $edit_icon  = '<a class="right_link" href="gradebook_edit_cat.php?editcat='.$catobj->get_id().'&amp;cidReq='.$catobj->get_course_code().'">'.Display::return_icon('edit.png', get_lang('Edit'), array(), ICON_SIZE_SMALL).'</a>';
            //$msg = Display::tag('h3', $weight.' - '.$min_certification);
            $msg = Display::tag('h4', $weight.' - '.$min_certification.$edit_icon);
    		//@todo show description
    		$description       = (($catobj->get_description() == "" || is_null($catobj->get_description())) ? '' : '<strong>'.get_lang('GradebookDescriptionLog').'</strong>'.': '.$catobj->get_description());
    		Display::display_normal_message($msg, false);
    		if (!empty($description)) {
    		    echo Display::div($description, array());
    		}
		}
	}

	function display_reduce_header_gradebook($catobj,$is_course_admin, $is_platform_admin, $simple_search_form, $show_add_qualification = true, $show_add_link = true) {
		//student
		if (!$is_course_admin) {
			$user= api_get_user_info(api_get_user_id());
			$catcourse= Category :: load($catobj->get_id());
			$scoredisplay = ScoreDisplay :: instance();
			$scorecourse = $catcourse[0]->calc_score(api_get_user_id());
			$scorecourse_display = (isset($scorecourse) ? $scoredisplay->display_score($scorecourse,SCORE_AVERAGE) : get_lang('NoResultsAvailable'));
			$cattotal = Category :: load(0);
			$scoretotal= $cattotal[0]->calc_score(api_get_user_id());
			$scoretotal_display = (isset($scoretotal) ? $scoredisplay->display_score($scoretotal,SCORE_PERCENT) : get_lang('NoResultsAvailable'));
			$scoreinfo = get_lang('StatsStudent') . ' :<b> '.$user['complete_name'].'</b><br />';
			if ((!$catobj->get_id() == '0') && (!isset ($_GET['studentoverview'])) && (!isset ($_GET['search'])))
				$scoreinfo.= '<br />'.get_lang('TotalForThisCategory') . ' : <b>' . $scorecourse_display . '</b>';
			$scoreinfo.= '<br />'.get_lang('Total') . ' : <b>' . $scoretotal_display . '</b>';
			Display :: display_normal_message($scoreinfo,false);

		}
			// show navigation tree and buttons?
			$header = '<div class="actions">';

			if ($is_course_admin) {
				$header .= '<a href="gradebook_flatview.php?'.api_get_cidreq().'&selectcat=' . $catobj->get_id() . '">'.Display::return_icon('stats.png', get_lang('FlatView'),'',ICON_SIZE_MEDIUM).'</a>';
				$header .= '<a href="gradebook_scoring_system.php?'.api_get_cidreq().'&selectcat=' . $catobj->get_id() .'">'.Display::return_icon('settings.png', get_lang('ScoreEdit'),'',ICON_SIZE_MEDIUM).'</a>';
			} elseif (!(isset ($_GET['studentoverview']))) {
				$header .= '<a href="'.api_get_self().'?'.api_get_cidreq().'&studentoverview=&selectcat=' . $catobj->get_id() . '">'.Display::return_icon('view_list.gif', get_lang('FlatView')).' ' . get_lang('FlatView') . '</a>';
			} else {
				$header .= '<a href="'.api_get_self().'?'.api_get_cidreq().'&studentoverview=&exportpdf=&selectcat=' . $catobj->get_id() . '" target="_blank">'.Display::return_icon('pdf.png', get_lang('ExportPDF'),'',ICON_SIZE_MEDIUM).'</a>';
			}
		$header.='</div>';
		echo $header;
	}

	function display_header_user($userid) {
		$select_cat   = intval($_GET['selectcat']);
		$user_id      = $userid;
		$user         = api_get_user_info($user_id);

		$catcourse    = Category :: load($select_cat);
		$scoredisplay = ScoreDisplay :: instance();
		$scorecourse  = $catcourse[0]->calc_score($user_id);

		// generating the total score for a course
		$allevals= $catcourse[0]->get_evaluations($user_id,true);
		$alllinks= $catcourse[0]->get_links($user_id,true);
		$evals_links = array_merge($allevals, $alllinks);
		$item_value=0;
		$item_total=0;
		for ($count=0; $count < count($evals_links); $count++) {
			$item = $evals_links[$count];
			$score = $item->calc_score($user_id);
			$my_score_denom=($score[1]==0) ? 1 : $score[1];
			$item_value+=$score[0]/$my_score_denom*$item->get_weight();
			$item_total+=$item->get_weight();
			//$row[] = $scoredisplay->display_score($score,SCORE_DIV_PERCENT);
		}
		$item_value = number_format($item_value, 2, '.', ' ');
		$total_score=array($item_value,$item_total);
		$scorecourse_display = $scoredisplay->display_score($total_score,SCORE_DIV_PERCENT);

		//$scorecourse_display = (isset($scorecourse) ? $scoredisplay->display_score($scorecourse,SCORE_AVERAGE) : get_lang('NoResultsAvailable'));
		$cattotal = Category :: load(0);
		$scoretotal= $cattotal[0]->calc_score($user_id);
		$scoretotal_display = (isset($scoretotal) ? $scoredisplay->display_score($scoretotal,SCORE_PERCENT) : get_lang('NoResultsAvailable'));

		$image_syspath = UserManager::get_user_picture_path_by_id($userid,'system',false,true);
        $image_size = getimagesize($image_syspath['dir'].$image_syspath['file']);
        //Web path
        $image_path = UserManager::get_user_picture_path_by_id($userid,'web',false,true);
        $image_file = $image_path['dir'].$image_path['file'];
		$img_attributes= 'src="' . $image_file . '?rand=' . time() . '" ' . 'alt="' . $user['complete_name'] . '" ';
		if ($image_size[0] > 200) {
		 //limit display width to 200px
 			$img_attributes .= 'width="200" ';
		}
		$info = '<div class="row"><div class="span3">';
        $info .= '<div class="thumbnail"><img ' . $img_attributes . '/></div>';
        $info .= '</div>';
        $info .= '<div class="span6">';
		$info .= get_lang('Name') . ' :  <a target="_blank" href="'.api_get_path(WEB_CODE_PATH).'social/profile.php?u=' . $userid . '"> ' . api_get_person_name($user['firstname'], $user['lastname']) . '</a><br />';

		if (api_get_setting('show_email_addresses') == 'true') {
            $info .= get_lang('Email') . ' : <a href="mailto:' . $user['email'] . '">' . $user['email'] . '</a><br />';
        }

		$info .= get_lang('TotalUser') . ' : <b>' . $scorecourse_display . '</b>';
		$info .= '</div>';
        $info .= '</div>';

    	//$scoreinfo = get_lang('StatsStudent') . ' :<b> '.api_get_person_name($user['lastname'], $user['firstname']).'</b><br />';
		//$scoreinfo.= '<br />'.get_lang('Total') . ' : <b>' . $scorecourse_display . '</b>';

		//$scoreinfo.= '<br />'.get_lang('Total') . ' : <b>' . $scoretotal_display . '</b>';
        echo $info;
	}
}