+++ /dev/null
-<?php
-/************************************************************************/
-/* ATutor */
-/************************************************************************/
-/* Copyright (c) 2002-2008 by Greg Gay, Joel Kronenberg & Heidi Hazelton*/
-/* Adaptive Technology Resource Centre / University of Toronto */
-/* http://atutor.ca */
-/* */
-/* 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. */
-/************************************************************************/
-// $Id: gradebook.inc.php 7208 2008-05-28 16:07:24Z cindy $
-
-// input: member_id
-// return: array of grade scales created by member_id, member_id is set to 0 by default, which is to get preset grade scales
-// returned array format:
-//Array
-//(
-// [1] => A+ - E
-// [2] => Pass - Fail
-// [3] => Excellent - Inadequate
-// [grade_scale_id] => scale_value_max - scale_value_min (Value Explanation)
-//)
-define ('USE_HIGHER_GRADE', 1);
-define ('USE_LOWER_GRADE', 2);
-define ('NOT_OVERWRITE', 3);
-define ('OVERWRITE', 4);
-
-function get_grade_scales_array($member_id = 0)
-{
- global $db;
-
- $sql = "SELECT d.grade_scale_id, MIN(percentage_to) min, MAX(percentage_to) max FROM ".TABLE_PREFIX."grade_scales_detail d, ".TABLE_PREFIX."grade_scales g WHERE d.grade_scale_id = g.grade_scale_id AND g.member_id = ". $member_id ." GROUP BY d.grade_scale_id";
- $result = mysql_query($sql, $db) or die(mysql_error());
-
- $preset_grade_scales = array();
- while ($row = mysql_fetch_assoc($result))
- {
- $sql_min = "SELECT scale_value FROM ".TABLE_PREFIX."grade_scales_detail WHERE grade_scale_id=".$row["grade_scale_id"]." AND percentage_to=".$row["min"];
- $result_min = mysql_query($sql_min, $db) or die(mysql_error());
- $row_min = mysql_fetch_assoc($result_min);
- $min_value = $row_min['scale_value'];
-
- $sql_max = "SELECT scale_value FROM ".TABLE_PREFIX."grade_scales_detail WHERE grade_scale_id=".$row["grade_scale_id"]." AND percentage_to=".$row["max"];
- $result_max = mysql_query($sql_max, $db) or die(mysql_error());
- $row_max = mysql_fetch_assoc($result_max);
- $max_value = $row_max['scale_value'];
-
- $preset_grade_scales[$row["grade_scale_id"]] = $max_value . " - ". $min_value;
- }
-
- return $preset_grade_scales;
-}
-
-// generate html of dropdown list box on preset grade scales and grade scales created by current member Id
-// parameter: $selected_grade_scale_id: the grade_scale_id that need to set to be selected.
-// return: html text
-function print_grade_scale_selectbox($selected_grade_scale_id = 0, $id_name="selected_grade_scale_id")
-{
-?>
- <select name="selected_grade_scale_id" id="<?php echo $id_name; ?>">
- <option value="0" <?php if ($selected_grade_scale_id == 0) { echo 'selected="selected"'; } ?>><?php echo _AT('none'); ?></option>
- <?php
- // preset grade scales
- $preset_scales = get_grade_scales_array();
-
- if (count($preset_scales) > 0)
- {
- ?>
- <optgroup label="<?php echo _AT('presets'); ?>">
- <?php
- //presets
- foreach ($preset_scales as $id=>$preset)
- {
- echo '<option value="'.$id.'" ';
- if ($selected_grade_scale_id == $id) echo 'selected="selected"';
- echo '>'.$preset.'</option>'."\n\r";
- }
- echo ' </optgroup>'."\n\r";
- }
-
- //previously used
- $custom_scales = get_grade_scales_array($_SESSION["member_id"]);
-
- if (count($custom_scales) > 0)
- {
- echo ' <optgroup label="'. _AT('custom').'">'."\n\r";
- foreach ($custom_scales as $id=>$custom)
- {
- echo '<option value="'.$id.'" ';
- if ($selected_grade_scale_id == $id) echo 'selected="selected"';
- echo '>'.$custom.'</option>'."\n\r";
- }
- echo ' </optgroup>'."\n\r";
- }
- ?>
- </select>
-
-<?php
-}
-
-// This function returns grade based on grade scale
-// Note: $score can be one of: grade itself, percentage, raw final score.
-// If $score is raw final score, $out_of has to be provided, otherwise,
-// don't have to provide $out_of
-function get_mark_by_grade($grade_scale_id, $score, $out_of='')
-{
- global $db;
-
- $score = trim($score);
- $out_of = trim($out_of);
-
- if ($out_of == '') $default_mark = $score;
- else $default_mark = $score ." / " . $out_of;
-
- // if $grade_scale_id is 0 or not given, return $score itself.
- if ($grade_scale_id == 0 || $grade_scale_id == '')
- $mark = $default_mark;
- else // raw score
- {
- $sql_grade = "SELECT * from ".TABLE_PREFIX."grade_scales_detail WHERE grade_scale_id = ". $grade_scale_id. " ORDER BY percentage_to DESC";
- $result_grade = mysql_query($sql_grade, $db) or die(mysql_error());
-
- if (mysql_num_rows($result_grade) == 0)
- $mark = $default_mark;
- else
- {
- // check if $score is already the grade. If it is, return $score
- while ($row_grade = mysql_fetch_assoc($result_grade))
- {
- if ($row_grade['scale_value'] == $score) return $score;
- }
-
- if (substr($score, -1) == '%') // percentage
- $mark_in_percentage = substr($score, 0, -1);
- else if ($out_of <> '' && $out_of <> 0) // raw final score
- $mark_in_percentage = $score / $out_of * 100;
-
- mysql_data_seek($result_grade, 0);
- while ($row_grade = mysql_fetch_assoc($result_grade))
- {
- if ($mark_in_percentage <= $row_grade['percentage_to'] && $mark_in_percentage >= $row_grade['percentage_from'])
- $mark = $row_grade['scale_value'];
- }
- }
- }
-
- // in case grade definition does not cover all scores
- if ($mark == '') $mark = $default_mark;
-
- return $mark;
-}
-
-function get_member_grade($test_id, $member_id, $grade_scale_id)
-{
- global $db;
-
- require_once(AT_INCLUDE_PATH.'lib/test_result_functions.inc.php');
-
- $grade = "";
-
- // find out final_score, out_of
- $sql = "SELECT t.random, t.out_of, r.result_id, r.final_score FROM ".TABLE_PREFIX."tests t, ".TABLE_PREFIX."tests_results r WHERE t.test_id=".$test_id." AND t.test_id=r.test_id AND r.member_id=".$member_id;
- $result = mysql_query($sql, $db) or die(mysql_error());
- $row = mysql_fetch_assoc($result);
-
- if (mysql_num_rows($result) > 0 && $row["final_score"] <> "")
- {
- if ($row['random']) {
- $out_of = get_random_outof($test_id, $row['result_id']);
- } else {
- $out_of = $row['out_of'];
- }
- $grade = get_mark_by_grade($grade_scale_id, $row["final_score"], $out_of);
- }
-
- return $grade;
-}
-
-// Return array of students in the given course who take the given test more than once
-// Parameter: $member_id, $test_id
-// Return: an empty array or
-//Array
-//(
-// [member_id1] => [num_takes1]
-// [member_id2] => [num_takes2]
-// ...
-//)
-function get_studs_take_more_than_once($course_id, $test_id)
-{
- global $db;
-
- $rtn_array = array();
-
- $sql = "SELECT m.first_name, m.last_name, count(result_id) num FROM ".TABLE_PREFIX."members m, ".TABLE_PREFIX."course_enrollment e, ".TABLE_PREFIX."tests_results t WHERE m.member_id = e.member_id AND e.course_id = ".$course_id." AND e.approved='y' AND e.role <> 'Instructor' AND e.member_id=t.member_id AND t.test_id=".$test_id." GROUP BY m.first_name, m.last_name having count(*) > 1";
- $result = mysql_query($sql, $db) or die(mysql_error());
-
- while ($row = mysql_fetch_assoc($result))
- $rtn_array[$row["first_name"]. " " . $row["last_name"]] = $row["num"];
-
- return $rtn_array;
-}
-
-// compare grades
-// parameters: 2 grades to compare, grade_scale_id, "higher"/"lower": return higher or lower grade
-// grade can be percentage like 70% or grade defined in grade_scale_id, like "A", "B"...
-// return: higher or lower grade depending on 4th parameter
-// or, -1 if grades are comparable
-function compare_grades($grade1, $grade2, $gradebook_test_id, $mode = "higher")
-{
- global $db;
-
- // get grade scale id
- $sql = "SELECT grade_scale_id FROM ".TABLE_PREFIX."gradebook_tests WHERE gradebook_test_id = ".$gradebook_test_id;
- $result = mysql_query($sql, $db) or die(mysql_error());
- $row = mysql_fetch_assoc($result);
- $grade_scale_id = $row["grade_scale_id"];
-
- if ($grade_scale_id == 0) // compare raw scores
- {
- // retrieve raw score
- $grade1 = trim(str_replace("%", "", $grade1));
- $grade2 = trim(str_replace("%", "", $grade2));
-
- if ($grade1 > $grade2) return 1;
- else if ($grade1 < $grade2) return -1;
- else return 0;
- }
- else
- {
- $grade1 = get_mark_by_grade($grade_scale_id, $grade1);
- $grade2 = get_mark_by_grade($grade_scale_id, $grade2);
-
- $grades = array();
-
- $sql_grade = "SELECT scale_value from ".TABLE_PREFIX."grade_scales_detail WHERE grade_scale_id = ". $grade_scale_id. " ORDER BY percentage_to DESC";
- $result_grade = mysql_query($sql_grade, $db) or die(mysql_error());
- while ($row_grade = mysql_fetch_assoc($result_grade))
- {
- $grades[] = $row_grade["scale_value"];
- }
-
- if (!in_array($grade1, $grades) || !in_array($grade2, $grades))
- return -1; // uncomparable
- else
- {
- $grade1_key = array_search($grade1, $grades);
- $grade2_key = array_search($grade2, $grades);
-
- if ($grade1_key > $grade2_key)
- {
- $higher_grade = $grade2;
- $lower_grade = $grade1;
- }
- else if ($grade1_key < $grade2_key)
- {
- $higher_grade = $grade1;
- $lower_grade = $grade2;
- }
- else $higher_grade = $lower_grade = $grade1;
- }
- }
-
- if ($mode == "higher") return $higher_grade;
- else return $lower_grade;
-}
-
-// check imported students and grades:
-// 1. if the student exists in the class, if not, report error
-// 2. if the grade already exists, if it is, report conflict
-// parameter: an array of student/grade info
-// Array
-//(
-// [member_id] => 1
-// [fname] => angelo (could be empty if [member_id] is given)
-// [lname] => yuan (could be empty if [member_id] is given)
-// [email] => angelo@hotmail.com (could be empty if [member_id] is given)
-// [grade] => 70%
-// [gradebook_test_id] => 4
-// [solve_conflict] => 0
-//)
-// return: an array of processed student/grade/error info
-// Array
-//(
-// [member_id] => 1
-// [fname] => angelo (could be empty if [member_id] is given)
-// [lname] => yuan (could be empty if [member_id] is given)
-// [email] => angelo@hotmail.com (could be empty if [member_id] is given)
-// [grade] => 70%
-// [gradebook_test_id] => 4
-// [solve_conflict] => 0
-// [error] => "Student not exists"
-// [has_conflict] => 1
-//)
-function check_user_info($record)
-{
- global $db;
-
- $record['fname'] = htmlspecialchars(stripslashes(trim($record['fname'])));
- $record['lname'] = htmlspecialchars(stripslashes(trim($record['lname'])));
- $record['member_id'] = htmlspecialchars(stripslashes(trim($record['member_id'])));
- $record['email'] = htmlspecialchars(stripslashes(trim($record['email'])));
- $record['grade'] = htmlspecialchars(stripslashes(trim($record['grade'])));
-
- if (empty($record['remove'])) {
- $record['remove'] = FALSE;
- }
-
- if ($record['member_id'] == '')
- {
- $sql = "SELECT * FROM ".TABLE_PREFIX."members m, ".TABLE_PREFIX."course_enrollment e WHERE m.first_name='".$record['fname']."' AND m.last_name='".$record['lname']."' AND m.email='".$record['email']."' AND m.member_id = e.member_id AND e.course_id=".$_SESSION["course_id"]." AND e.approved='y' AND e.role<>'Instructor'";
- $result = mysql_query($sql, $db) or die(mysql_error());
-
- if (mysql_num_rows($result) == 0)
- $record['error'] = _AT("student_not_exists");
- else
- {
- $row = mysql_fetch_assoc($result);
- $record['member_id'] = $row["member_id"];
- }
- }
-
- if ($record['error'] == "" && $record['member_id'] > 0)
- {
- $sql = "SELECT grade FROM ".TABLE_PREFIX."gradebook_detail WHERE gradebook_test_id=".$record['gradebook_test_id']. " AND member_id=".$record["member_id"];
- $result = mysql_query($sql, $db) or die(mysql_error());
-
- if (mysql_num_rows($result) > 0 && $record['solve_conflict'] == 0)
- {
- $row = mysql_fetch_assoc($result);
- $record['error'] = _AT("grade_already_exists", $row["grade"]);
- $record['conflict'] = 1;
- }
-
- if (mysql_num_rows($result) > 0 && $record['solve_conflict'] > 0)
- {
- $row = mysql_fetch_assoc($result);
-
- if ($record['solve_conflict'] == USE_HIGHER_GRADE || $record['solve_conflict'] == USE_LOWER_GRADE)
- {
- if ($record['solve_conflict'] == USE_HIGHER_GRADE)
- $grade = compare_grades($record['grade'], $row['grade'], $record['gradebook_test_id'], "higher");
-
- if ($record['solve_conflict'] == USE_LOWER_GRADE)
- $grade = compare_grades($record['grade'], $row['grade'], $record['gradebook_test_id'], "lower");
-
- if ($grade == -1)
- {
- $record["error"] = _AT("grades_uncomparable");
- $record['conflict'] = 1;
- }
- else
- $record['grade'] = $grade;
- }
-
- if ($record['solve_conflict'] == NOT_OVERWRITE) $record['grade'] = $row['grade'];
- if ($record['solve_conflict'] == OVERWRITE) $record['grade'] = $record['grade'];
- }
- }
-
- if ($record['remove']) {
- //unset errors
- $record['error'] = '';
- }
-
- return $record;
-}
-
-// update gradebook
-function update_gradebook_external_test($students, $gradebook_test_id)
-{
- global $db, $msg;
-
- foreach($students as $student)
- {
- if (!$student['remove'])
- {
- // retrieve member id
- $sql = "SELECT member_id FROM ".TABLE_PREFIX."members m WHERE m.first_name='".$student['fname']."' AND m.last_name='".$student['lname']."' AND m.email='".$student['email']."'";
- $result = mysql_query($sql, $db) or die(mysql_error());
- $row = mysql_fetch_assoc($result);
- $member_id = $row["member_id"];
-
- // retrieve grade scale id
- $sql = "SELECT grade_scale_id FROM ".TABLE_PREFIX."gradebook_tests WHERE gradebook_test_id=".$gradebook_test_id;
- $result = mysql_query($sql, $db) or die(mysql_error());
- $row = mysql_fetch_assoc($result);
- $grade_scale_id = $row["grade_scale_id"];
-
- $grade = get_mark_by_grade($grade_scale_id, $student["grade"]);
- $sql = "REPLACE INTO ".TABLE_PREFIX."gradebook_detail(gradebook_test_id, member_id, grade) VALUES(".$gradebook_test_id.", ".$member_id.", '".$grade."')";
- $result = mysql_query($sql, $db) or die(mysql_error());
-
- $updated_list .= '<li>' . $student['fname'] . ', '. $student['lname']. ': '. $grade. '</li>';
- }
- }
-
- if ($updated_list)
- {
- $feedback = array('GRADEBOOK_UPDATED', $updated_list);
- $msg->addFeedback($feedback);
- }
-}
-
-// return median value of the given array
-function median($grade_array)
-{
- $oe_value = count($grade_array);
-
- if ($oe_value % 2 == 0 )
- $position = 1;
- else
- $position = 2;
-
- if ($position == 2 )
- $median = $grade_array[(count($grade_array)/2)];
- else
- $median= $grade_array[(count($grade_array)/2)-1];
-
- return $median;
-}
-
-// return class average of the given test_id
-function get_class_avg($gradebook_test_id)
-{
- global $db;
-
- $sql = "SELECT * FROM ".TABLE_PREFIX."gradebook_tests WHERE gradebook_test_id=".$gradebook_test_id;
- $result = mysql_query($sql, $db) or die(mysql_error());
- $row = mysql_fetch_assoc($result);
-
- if ($row["id"]<>0) // internal atutor test
- {
- require_once (AT_INCLUDE_PATH.'lib/test_result_functions.inc.php');
-
- $sql_test = "SELECT * FROM ".TABLE_PREFIX."tests WHERE test_id=".$row["id"];
- $result_test = mysql_query($sql_test, $db) or die(mysql_error());
- $row_test = mysql_fetch_assoc($result_test);
-
- if ($row_test['out_of'] == 0 || $row_test['result_release']==AT_RELEASE_NEVER)
- return _AT("na");
-
- $sql_marks = "SELECT * FROM ".TABLE_PREFIX."tests_results WHERE test_id=".$row["id"]. " AND status=1";
- $result_marks = mysql_query($sql_marks, $db) or die(mysql_error());
-
- $num_students = 0;
- $total_final_score = 0;
- $total_out_of = 0;
- while ($row_marks = mysql_fetch_assoc($result_marks))
- {
- if ($row_marks['final_score'] == '' ) continue;
-
- $num_students++;
- $total_final_score += $row_marks["final_score"];
-
- if ($row_test['random'])
- $total_out_of += get_random_outof($row_marks['test_id'], $row_marks['result_id']);
- else
- $total_out_of += $row_test['out_of'];
- }
-
- if ($num_students > 0)
- {
- $avg_final_score = round($total_final_score / $num_students);
- $avg_out_of = round($total_out_of / $num_students);
- }
-
- if ($avg_final_score <> "")
- $avg_grade = get_mark_by_grade($row["grade_scale_id"], $avg_final_score, $avg_out_of);
- else
- $avg_grade = "";
- }
- else // external test
- {
- $sql_grades = "SELECT * FROM ".TABLE_PREFIX."gradebook_detail WHERE gradebook_test_id=".$gradebook_test_id." ORDER BY grade";
- $result_grades = mysql_query($sql_grades, $db) or die(mysql_error());
-
- $grade_array = array();
- while ($row_grades = mysql_fetch_assoc($result_grades))
- $grade_array[] = $row_grades["grade"];
-
- $avg_grade = median($grade_array);
- }
-
- if ($avg_grade == "") return _AT("na");
- else return $avg_grade;
-}
-?>
projects / atutor.git / blobdiff