[moodle.git] / blocks / quiz_results / block_quiz_results.php

<?php //$Id$

define('B_QUIZRESULTS_NAME_FORMAT_FULL', 1);
define('B_QUIZRESULTS_NAME_FORMAT_ID',   2);
define('B_QUIZRESULTS_NAME_FORMAT_ANON', 3);
define('B_QUIZRESULTS_GRADE_FORMAT_PCT', 1);
define('B_QUIZRESULTS_GRADE_FORMAT_FRA', 2);
define('B_QUIZRESULTS_GRADE_FORMAT_ABS', 3);

class block_quiz_results extends block_base {
    function init() {
        $this->title = get_string('formaltitle', 'block_quiz_results');
        $this->version = 2007101509;
    }

    function applicable_formats() {
        return array('course' => true, 'mod-quiz' => true);
    }

    function get_content() {
        global $USER, $CFG, $DB;

        if ($this->content !== NULL) {
            return $this->content;
        }

        $this->content = new stdClass;
        $this->content->text = '';
        $this->content->footer = '';

        if (empty($this->instance)) {
            return $this->content;
        }

        if($this->instance->pagetype == 'course-view') {
            // We need to see if we are monitoring a quiz 
            $quizid   = empty($this->config->quizid) ? 0 : $this->config->quizid;
            $courseid = $this->instance->pageid;
        }
        else {
            // Assuming we are displayed in the quiz view page
            $quizid    = $this->instance->pageid;

            // A trick to take advantage of instance config and save queries
            if (empty($this->config->courseid)) {
                $modrecord = $DB->get_record('modules', array('name'=>'quiz'));
                $cmrecord  = $DB->get_record('course_modules', array('module'=>$modrecord->id, 'instance'=>$quizid));
                $this->config->courseid = intval($cmrecord->course);
                $this->instance_config_commit();
            }
            $courseid = $this->config->courseid;
        }

        $context = get_context_instance(CONTEXT_COURSE, $courseid);


        if (empty($quizid)) {
            $this->content->text = get_string('error_emptyquizid', 'block_quiz_results');
            return $this->content;
        }

        // Get the quiz record
        $quiz = $DB->get_record('quiz', array('id' => $quizid));
        if (empty($quiz)) {
            $this->content->text = get_string('error_emptyquizrecord', 'block_quiz_results');
            return $this->content;
        }

        // Get the grades for this quiz
        $grades = $DB->get_records('quiz_grades', array('quiz' => $quizid), 'grade, timemodified DESC');

        if (empty($grades)) {
            // No grades, sorry
            // The block will hide itself in this case
            return $this->content;
        }

        if (empty($this->config->showbest) && empty($this->config->showworst)) {
            $this->content->text = get_string('configuredtoshownothing', 'block_quiz_results');
            return $this->content;
        }

        $groupmode = NOGROUPS;
        $best      = array();
        $worst     = array();

        $nameformat = intval(empty($this->config->nameformat)  ? B_QUIZRESULTS_NAME_FORMAT_FULL : $this->config->nameformat);

        if(!empty($this->config->usegroups)) {
            $groupmode = groups_get_activity_groupmode(
                    get_coursemodule_from_instance('quiz', $quizid, $courseid), $courseid);
        }

        if (has_capability('moodle/site:accessallgroups', $context) && $groupmode == SEPARATEGROUPS) {
            // We 'll make an exception in this case
            $groupmode = VISIBLEGROUPS;
        }

        switch($groupmode) {
            case VISIBLEGROUPS:
            // Display group-mode results
            $groups = groups_get_all_groups($courseid);

            if(empty($groups)) {
                // No groups exist, sorry
                $this->content->text = get_string('error_nogroupsexist', 'block_quiz_results');
                return $this->content;
            }

            // Find out all the userids which have a submitted grade
            $userids = array();
            $gradeforuser = array();
            foreach($grades as $grade) {
                $userids[] = $grade->userid;
                $gradeforuser[$grade->userid] = (float)$grade->grade;
            }

            // Now find which groups these users belong in
            list($usertest, $params) = $DB->get_in_or_equal($userids);
            $params[] = $courseid;
            $usergroups = $DB->get_records_sql('
                    SELECT gm.id, gm.userid, gm.groupid, g.name
                    FROM {groups} g
                    LEFT JOIN {groups_members} gm ON g.id = gm.groupid
                    WHERE gm.userid ' . $usertest . ' AND g.courseid = ?', $params);

            // Now, iterate the grades again and sum them up for each group
            $groupgrades = array();
            foreach ($usergroups as $usergroup) {
                if (!isset($groupgrades[$usergroup->groupid])) {
                    $groupgrades[$usergroup->groupid] = array(
                            'sum' => (float)$gradeforuser[$usergroup->userid],
                            'number' => 1,
                            'group' => $usergroup->name);
                } else {
                    $groupgrades[$usergroup->groupid]['sum'] += $gradeforuser[$usergroup->userid];
                    $groupgrades[$usergroup->groupid]['number'] += 1;
                }
            }

            foreach($groupgrades as $groupid => $groupgrade) {
                $groupgrades[$groupid]['average'] = $groupgrades[$groupid]['sum'] / $groupgrades[$groupid]['number'];
            }

            // Sort groupgrades according to average grade, ascending
            uasort($groupgrades, create_function('$a, $b', 'if($a["average"] == $b["average"]) return 0; return ($a["average"] > $b["average"] ? 1 : -1);'));

            // How many groups do we have with graded member submissions to show?
            $numbest  = empty($this->config->showbest) ? 0 : min($this->config->showbest, count($groupgrades));
            $numworst = empty($this->config->showworst) ? 0 : min($this->config->showworst, count($groupgrades) - $numbest);

            // Collect all the group results we are going to use in $best and $worst
            $remaining = $numbest;
            $groupgrade = end($groupgrades);
            while($remaining--) {
                $best[key($groupgrades)] = $groupgrade['average'];
                $groupgrade = prev($groupgrades);
            }

            $remaining = $numworst;
            $groupgrade = reset($groupgrades);
            while($remaining--) {
                $worst[key($groupgrades)] = $groupgrade['average'];
                $groupgrade = next($groupgrades);
            }

            // Ready for output!
            $gradeformat = intval(empty($this->config->gradeformat) ? B_QUIZRESULTS_GRADE_FORMAT_PCT : $this->config->gradeformat);

            if($this->instance->pagetype != 'mod-quiz-view') {
                // Don't show header and link to the quiz if we ARE at the quiz...
                $this->content->text .= '<h1><a href="'.$CFG->wwwroot.'/mod/quiz/view.php?q='.$quizid.'">'.$quiz->name.'</a></h1>';
            }

            if ($nameformat = B_QUIZRESULTS_NAME_FORMAT_FULL) {
                if (has_capability('moodle/course:managegroups', $context)) {
                    $grouplink = $CFG->wwwroot.'/group/overview.php?id='.$courseid.'&amp;group=';
                } else if (has_capability('moodle/course:viewparticipants', $context)) {
                    $grouplink = $CFG->wwwroot.'/user/index.php?id='.$courseid.'&amp;group=';
                } else {
                    $grouplink = '';
                }
            }

            $rank = 0;
            if(!empty($best)) {
                $this->content->text .= '<table class="grades"><caption>';
                $this->content->text .= ($numbest == 1?get_string('bestgroupgrade', 'block_quiz_results'):get_string('bestgroupgrades', 'block_quiz_results', $numbest));
                $this->content->text .= '</caption><colgroup class="number" /><colgroup class="name" /><colgroup class="grade" /><tbody>';
                foreach($best as $groupid => $averagegrade) {
                    switch($nameformat) {
                        case B_QUIZRESULTS_NAME_FORMAT_ANON:
                        case B_QUIZRESULTS_NAME_FORMAT_ID:
                            $thisname = get_string('group');
                        break;
                        default:
                        case B_QUIZRESULTS_NAME_FORMAT_FULL:
                            if ($grouplink) {
                                $thisname = '<a href="'.$grouplink.$groupid.'">'.$groupgrades[$groupid]['group'].'</a>';
                            } else {
                                $thisname = $groupgrades[$groupid]['group'];
                            }
                        break;
                    }
                    $this->content->text .= '<tr><td>'.(++$rank).'.</td><td>'.$thisname.'</td><td>';
                    switch($gradeformat) {
                        case B_QUIZRESULTS_GRADE_FORMAT_FRA:
                            $this->content->text .= quiz_format_grade($quiz, $averagegrade).'/'.$quiz->grade;
                        break;
                        case B_QUIZRESULTS_GRADE_FORMAT_ABS:
                            $this->content->text .= quiz_format_grade($quiz, $averagegrade);
                        break;
                        default:
                        case B_QUIZRESULTS_GRADE_FORMAT_PCT:
                            $this->content->text .= round((float)$averagegrade / (float)$quiz->grade * 100).'%';
                        break;
                    }
                    $this->content->text .= '</td></tr>';
                }
                $this->content->text .= '</tbody></table>';
            }

            $rank = 0;
            if(!empty($worst)) {
                $worst = array_reverse($worst, true);
                $this->content->text .= '<table class="grades"><caption>';
                $this->content->text .= ($numworst == 1?get_string('worstgroupgrade', 'block_quiz_results'):get_string('worstgroupgrades', 'block_quiz_results', $numworst));
                $this->content->text .= '</caption><colgroup class="number" /><colgroup class="name" /><colgroup class="grade" /><tbody>';
                foreach($worst as $groupid => $averagegrade) {
                    switch($nameformat) {
                        case B_QUIZRESULTS_NAME_FORMAT_ANON:
                        case B_QUIZRESULTS_NAME_FORMAT_ID:
                            $thisname = get_string('group');
                        break;
                        default:
                        case B_QUIZRESULTS_NAME_FORMAT_FULL:
                            $thisname = '<a href="'.$CFG->wwwroot.'/course/group.php?group='.$groupid.'&amp;id='.$courseid.'">'.$groupgrades[$groupid]['group'].'</a>';
                        break;
                    }
                    $this->content->text .= '<tr><td>'.(++$rank).'.</td><td>'.$thisname.'</td><td>';
                    switch($gradeformat) {
                        case B_QUIZRESULTS_GRADE_FORMAT_FRA:
                            $this->content->text .= quiz_format_grade($quiz, $averagegrade).'/'.$quiz->grade;
                        break;
                        case B_QUIZRESULTS_GRADE_FORMAT_ABS:
                            $this->content->text .= quiz_format_grade($quiz, $averagegrade);
                        break;
                        default:
                        case B_QUIZRESULTS_GRADE_FORMAT_PCT:
                            $this->content->text .= round((float)$averagegrade / (float)$quiz->grade * 100).'%';
                        break;
                    }
                    $this->content->text .= '</td></tr>';
                }
                $this->content->text .= '</tbody></table>';
            }
            break;


            case SEPARATEGROUPS:
            // This is going to be just like no-groups mode, only we 'll filter
            // out the grades from people not in our group.
            if(empty($USER) || empty($USER->id)) {
                // Not logged in, so show nothing
                return $this->content;
            }

            $mygroups = groups_get_all_groups($courseid, $USER->id);
            if(empty($mygroups)) {
                // Not member of a group, show nothing
                return $this->content;
            }

            // Get users from the same groups as me.
            list($grouptest, $params) = $DB->get_in_or_equal(array_keys($mygroups));
            $mygroupsusers = $DB->get_records_sql_menu(
                    'SELECT DISTINCT userid, 1 FROM {groups_members} WHERE groupid ' . $grouptest,
                    $params);

            // Filter out the grades belonging to other users, and proceed as if there were no groups
            foreach ($grades as $key => $grade) {
                if (!isset($mygroupsusers[$grade->userid])) {
                    unset($grades[$key]);
                }
            }

            // No break, fall through to the default case now we have filtered the $grades array.
            default:
            case NOGROUPS:
            // Single user mode
            $numbest  = empty($this->config->showbest) ? 0 : min($this->config->showbest, count($grades));
            $numworst = empty($this->config->showworst) ? 0 : min($this->config->showworst, count($grades) - $numbest);

            // Collect all the usernames we are going to need
            $remaining = $numbest;
            $grade = end($grades);
            while($remaining--) {
                $best[$grade->userid] = $grade->id;
                $grade = prev($grades);
            }

            $remaining = $numworst;
            $grade = reset($grades);
            while($remaining--) {
                $worst[$grade->userid] = $grade->id;
                $grade = next($grades);
            }

            if(empty($best) && empty($worst)) {
                // Nothing to show, for some reason...
                return $this->content;
            }

            // Now grab all the users from the database
            $userids = array_merge(array_keys($best), array_keys($worst));
            $users = $DB->get_records_list('user', 'id', $userids, '', 'id, firstname, lastname, idnumber');

            // Ready for output!

            $gradeformat = intval(empty($this->config->gradeformat) ? B_QUIZRESULTS_GRADE_FORMAT_PCT : $this->config->gradeformat);

            if($this->instance->pagetype != 'mod-quiz-view') {
                // Don't show header and link to the quiz if we ARE at the quiz...
                $this->content->text .= '<h1><a href="'.$CFG->wwwroot.'/mod/quiz/view.php?q='.$quizid.'">'.$quiz->name.'</a></h1>';
            }

            $rank = 0;
            if(!empty($best)) {
                $this->content->text .= '<table class="grades"><caption>';
                $this->content->text .= ($numbest == 1?get_string('bestgrade', 'block_quiz_results'):get_string('bestgrades', 'block_quiz_results', $numbest));
                $this->content->text .= '</caption><colgroup class="number" /><colgroup class="name" /><colgroup class="grade" /><tbody>';
                foreach($best as $userid => $gradeid) {
                    switch($nameformat) {
                        case B_QUIZRESULTS_NAME_FORMAT_ID:
                            $thisname = get_string('user').' '.intval($users[$userid]->idnumber);
                        break;
                        case B_QUIZRESULTS_NAME_FORMAT_ANON:
                            $thisname = get_string('user');
                        break;
                        default:
                        case B_QUIZRESULTS_NAME_FORMAT_FULL:
                            $thisname = '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$userid.'&amp;course='.$courseid.'">'.fullname($users[$userid]).'</a>';
                        break;
                    }
                    $this->content->text .= '<tr><td>'.(++$rank).'.</td><td>'.$thisname.'</td><td>';
                    switch($gradeformat) {
                        case B_QUIZRESULTS_GRADE_FORMAT_FRA:
                            $this->content->text .=  quiz_format_grade($quiz, $grades[$gradeid]->grade).'/'.$quiz->grade;
                        break;
                        case B_QUIZRESULTS_GRADE_FORMAT_ABS:
                            $this->content->text .= quiz_format_grade($quiz, $grades[$gradeid]->grade);
                        break;
                        default:
                        case B_QUIZRESULTS_GRADE_FORMAT_PCT:
                            if ($quiz->grade) {
                                $this->content->text .= round((float)$grades[$gradeid]->grade / (float)$quiz->grade * 100).'%';
                            } else {
                                $this->content->text .= '--%';
                            }
                        break;
                    }
                    $this->content->text .= '</td></tr>';
                }
                $this->content->text .= '</tbody></table>';
            }

            $rank = 0;
            if(!empty($worst)) {
                $worst = array_reverse($worst, true);
                $this->content->text .= '<table class="grades"><caption>';
                $this->content->text .= ($numworst == 1?get_string('worstgrade', 'block_quiz_results'):get_string('worstgrades', 'block_quiz_results', $numworst));
                $this->content->text .= '</caption><colgroup class="number" /><colgroup class="name" /><colgroup class="grade" /><tbody>';
                foreach($worst as $userid => $gradeid) {
                    switch($nameformat) {
                        case B_QUIZRESULTS_NAME_FORMAT_ID:
                            $thisname = get_string('user').' '.intval($users[$userid]->idnumber);
                        break;
                        case B_QUIZRESULTS_NAME_FORMAT_ANON:
                            $thisname = get_string('user');
                        break;
                        default:
                        case B_QUIZRESULTS_NAME_FORMAT_FULL:
                            $thisname = '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$userid.'&amp;course='.$courseid.'">'.fullname($users[$userid]).'</a>';
                        break;
                    }
                    $this->content->text .= '<tr><td>'.(++$rank).'.</td><td>'.$thisname.'</td><td>';
                    switch($gradeformat) {
                        case B_QUIZRESULTS_GRADE_FORMAT_FRA:
                            $this->content->text .= quiz_format_grade($quiz, $grades[$gradeid]->grade).'/'.$quiz->grade;
                        break;
                        case B_QUIZRESULTS_GRADE_FORMAT_ABS:
                            $this->content->text .= quiz_format_grade($quiz, $grades[$gradeid]->grade);
                        break;
                        default:
                        case B_QUIZRESULTS_GRADE_FORMAT_PCT:
                            $this->content->text .= round((float)$grades[$gradeid]->grade / (float)$quiz->grade * 100).'%';
                        break;
                    }
                    $this->content->text .= '</td></tr>';
                }
                $this->content->text .= '</tbody></table>';
            }
            break;
        }

        return $this->content;
    }

    function instance_allow_multiple() {
        return true;
    }
}

?>
Commit	Line	Data
98ad7484	1	<?php //$Id$
98ad7484	2
85311ca8	3	define('B_QUIZRESULTS_NAME_FORMAT_FULL', 1);
	4	define('B_QUIZRESULTS_NAME_FORMAT_ID', 2);
	5	define('B_QUIZRESULTS_NAME_FORMAT_ANON', 3);
	6	define('B_QUIZRESULTS_GRADE_FORMAT_PCT', 1);
	7	define('B_QUIZRESULTS_GRADE_FORMAT_FRA', 2);
	8	define('B_QUIZRESULTS_GRADE_FORMAT_ABS', 3);
98ad7484	9
	10	class block_quiz_results extends block_base {
	11	function init() {
	12	$this->title = get_string('formaltitle', 'block_quiz_results');
433c242f	13	$this->version = 2007101509;
98ad7484	14	}
98ad7484	15
63927672	16	function applicable_formats() {
76d37688	17	return array('course' => true, 'mod-quiz' => true);
63927672	18	}
63927672	19
98ad7484	20	function get_content() {
44e1b7d7	21	global $USER, $CFG, $DB;
98ad7484	22
	23	if ($this->content !== NULL) {
	24	return $this->content;
	25	}
98ad7484	26
	27	$this->content = new stdClass;
	28	$this->content->text = '';
	29	$this->content->footer = '';
	30
164e3054	31	if (empty($this->instance)) {
	32	return $this->content;
	33	}
	34
09fe3652	35	if($this->instance->pagetype == 'course-view') {
98ad7484	36	// We need to see if we are monitoring a quiz
	37	$quizid = empty($this->config->quizid) ? 0 : $this->config->quizid;
	38	$courseid = $this->instance->pageid;
	39	}
	40	else {
	41	// Assuming we are displayed in the quiz view page
e0a80e89	42	$quizid = $this->instance->pageid;
0144a0a7	43
0144a0a7	44	// A trick to take advantage of instance config and save queries
f28f2d90	45	if (empty($this->config->courseid)) {
	46	$modrecord = $DB->get_record('modules', array('name'=>'quiz'));
	47	$cmrecord = $DB->get_record('course_modules', array('module'=>$modrecord->id, 'instance'=>$quizid));
0144a0a7	48	$this->config->courseid = intval($cmrecord->course);
	49	$this->instance_config_commit();
	50	}
	51	$courseid = $this->config->courseid;
98ad7484	52	}
98ad7484	53
01199ea9	54	$context = get_context_instance(CONTEXT_COURSE, $courseid);
	55
	56
f28f2d90	57	if (empty($quizid)) {
6b4dc5a3	58	$this->content->text = get_string('error_emptyquizid', 'block_quiz_results');
98ad7484	59	return $this->content;
	60	}
	61
	62	// Get the quiz record
7192011c	63	$quiz = $DB->get_record('quiz', array('id' => $quizid));
f28f2d90	64	if (empty($quiz)) {
6b4dc5a3	65	$this->content->text = get_string('error_emptyquizrecord', 'block_quiz_results');
98ad7484	66	return $this->content;
	67	}
	68
	69	// Get the grades for this quiz
7192011c	70	$grades = $DB->get_records('quiz_grades', array('quiz' => $quizid), 'grade, timemodified DESC');
98ad7484	71
f28f2d90	72	if (empty($grades)) {
98ad7484	73	// No grades, sorry
6b4dc5a3	74	// The block will hide itself in this case
00a4237f	75	return $this->content;
98ad7484	76	}
98ad7484	77
7192011c	78	if (empty($this->config->showbest) && empty($this->config->showworst)) {
e7c15eca	79	$this->content->text = get_string('configuredtoshownothing', 'block_quiz_results');
	80	return $this->content;
	81	}
	82
6b4dc5a3	83	$groupmode = NOGROUPS;
	84	$best = array();
	85	$worst = array();
98ad7484	86
85311ca8	87	$nameformat = intval(empty($this->config->nameformat) ? B_QUIZRESULTS_NAME_FORMAT_FULL : $this->config->nameformat);
85311ca8	88
98ad7484	89	if(!empty($this->config->usegroups)) {
f88fb62c	90	$groupmode = groups_get_activity_groupmode(
7192011c	91	get_coursemodule_from_instance('quiz', $quizid, $courseid), $courseid);
98ad7484	92	}
6b4dc5a3	93
f28f2d90	94	if (has_capability('moodle/site:accessallgroups', $context) && $groupmode == SEPARATEGROUPS) {
b35bc4d8	95	// We 'll make an exception in this case
	96	$groupmode = VISIBLEGROUPS;
	97	}
6b4dc5a3	98
b35bc4d8	99	switch($groupmode) {
	100	case VISIBLEGROUPS:
	101	// Display group-mode results
2c386f82	102	$groups = groups_get_all_groups($courseid);
6b4dc5a3	103
	104	if(empty($groups)) {
	105	// No groups exist, sorry
	106	$this->content->text = get_string('error_nogroupsexist', 'block_quiz_results');
	107	return $this->content;
	108	}
	109
	110	// Find out all the userids which have a submitted grade
	111	$userids = array();
7192011c	112	$gradeforuser = array();
6b4dc5a3	113	foreach($grades as $grade) {
6b4dc5a3	114	$userids[] = $grade->userid;
7192011c	115	$gradeforuser[$grade->userid] = (float)$grade->grade;
6b4dc5a3	116	}
	117
	118	// Now find which groups these users belong in
7192011c	119	list($usertest, $params) = $DB->get_in_or_equal($userids);
	120	$params[] = $courseid;
	121	$usergroups = $DB->get_records_sql('
	122	SELECT gm.id, gm.userid, gm.groupid, g.name
	123	FROM {groups} g
	124	LEFT JOIN {groups_members} gm ON g.id = gm.groupid
	125	WHERE gm.userid ' . $usertest . ' AND g.courseid = ?', $params);
	126
	127	// Now, iterate the grades again and sum them up for each group
6b4dc5a3	128	$groupgrades = array();
7192011c	129	foreach ($usergroups as $usergroup) {
	130	if (!isset($groupgrades[$usergroup->groupid])) {
	131	$groupgrades[$usergroup->groupid] = array(
	132	'sum' => (float)$gradeforuser[$usergroup->userid],
	133	'number' => 1,
	134	'group' => $usergroup->name);
	135	} else {
	136	$groupgrades[$usergroup->groupid]['sum'] += $gradeforuser[$usergroup->userid];
	137	$groupgrades[$usergroup->groupid]['number'] += 1;
6b4dc5a3	138	}
	139	}
	140
3779fd55	141	foreach($groupgrades as $groupid => $groupgrade) {
	142	$groupgrades[$groupid]['average'] = $groupgrades[$groupid]['sum'] / $groupgrades[$groupid]['number'];
	143	}
	144
	145	// Sort groupgrades according to average grade, ascending
	146	uasort($groupgrades, create_function('$a, $b', 'if($a["average"] == $b["average"]) return 0; return ($a["average"] > $b["average"] ? 1 : -1);'));
6b4dc5a3	147
	148	// How many groups do we have with graded member submissions to show?
	149	$numbest = empty($this->config->showbest) ? 0 : min($this->config->showbest, count($groupgrades));
	150	$numworst = empty($this->config->showworst) ? 0 : min($this->config->showworst, count($groupgrades) - $numbest);
	151
	152	// Collect all the group results we are going to use in $best and $worst
	153	$remaining = $numbest;
	154	$groupgrade = end($groupgrades);
	155	while($remaining--) {
3779fd55	156	$best[key($groupgrades)] = $groupgrade['average'];
6b4dc5a3	157	$groupgrade = prev($groupgrades);
	158	}
	159
	160	$remaining = $numworst;
	161	$groupgrade = reset($groupgrades);
	162	while($remaining--) {
3779fd55	163	$worst[key($groupgrades)] = $groupgrade['average'];
6b4dc5a3	164	$groupgrade = next($groupgrades);
	165	}
	166
	167	// Ready for output!
85311ca8	168	$gradeformat = intval(empty($this->config->gradeformat) ? B_QUIZRESULTS_GRADE_FORMAT_PCT : $this->config->gradeformat);
6b4dc5a3	169
09fe3652	170	if($this->instance->pagetype != 'mod-quiz-view') {
f58a15de	171	// Don't show header and link to the quiz if we ARE at the quiz...
	172	$this->content->text .= '<h1><a href="'.$CFG->wwwroot.'/mod/quiz/view.php?q='.$quizid.'">'.$quiz->name.'</a></h1>';
	173	}
6b4dc5a3	174
9d6c4e80	175	if ($nameformat = B_QUIZRESULTS_NAME_FORMAT_FULL) {
9d6c4e80	176	if (has_capability('moodle/course:managegroups', $context)) {
3d05fc13	177	$grouplink = $CFG->wwwroot.'/group/overview.php?id='.$courseid.'&group=';
9d6c4e80	178	} else if (has_capability('moodle/course:viewparticipants', $context)) {
	179	$grouplink = $CFG->wwwroot.'/user/index.php?id='.$courseid.'&group=';
	180	} else {
	181	$grouplink = '';
	182	}
	183	}
	184
6b4dc5a3	185	$rank = 0;
6b4dc5a3	186	if(!empty($best)) {
d9f7e051	187	$this->content->text .= '<table class="grades"><caption>';
	188	$this->content->text .= ($numbest == 1?get_string('bestgroupgrade', 'block_quiz_results'):get_string('bestgroupgrades', 'block_quiz_results', $numbest));
	189	$this->content->text .= '</caption><colgroup class="number" /><colgroup class="name" /><colgroup class="grade" /><tbody>';
6b4dc5a3	190	foreach($best as $groupid => $averagegrade) {
85311ca8	191	switch($nameformat) {
	192	case B_QUIZRESULTS_NAME_FORMAT_ANON:
	193	case B_QUIZRESULTS_NAME_FORMAT_ID:
	194	$thisname = get_string('group');
	195	break;
	196	default:
	197	case B_QUIZRESULTS_NAME_FORMAT_FULL:
9d6c4e80	198	if ($grouplink) {
	199	$thisname = '<a href="'.$grouplink.$groupid.'">'.$groupgrades[$groupid]['group'].'</a>';
	200	} else {
	201	$thisname = $groupgrades[$groupid]['group'];
	202	}
85311ca8	203	break;
	204	}
	205	$this->content->text .= '<tr><td>'.(++$rank).'.</td><td>'.$thisname.'</td><td>';
6b4dc5a3	206	switch($gradeformat) {
85311ca8	207	case B_QUIZRESULTS_GRADE_FORMAT_FRA:
f88fb62c	208	$this->content->text .= quiz_format_grade($quiz, $averagegrade).'/'.$quiz->grade;
6b4dc5a3	209	break;
85311ca8	210	case B_QUIZRESULTS_GRADE_FORMAT_ABS:
f88fb62c	211	$this->content->text .= quiz_format_grade($quiz, $averagegrade);
6b4dc5a3	212	break;
6b4dc5a3	213	default:
85311ca8	214	case B_QUIZRESULTS_GRADE_FORMAT_PCT:
090cf95a	215	$this->content->text .= round((float)$averagegrade / (float)$quiz->grade * 100).'%';
6b4dc5a3	216	break;
	217	}
	218	$this->content->text .= '</td></tr>';
	219	}
	220	$this->content->text .= '</tbody></table>';
	221	}
	222
	223	$rank = 0;
	224	if(!empty($worst)) {
	225	$worst = array_reverse($worst, true);
d9f7e051	226	$this->content->text .= '<table class="grades"><caption>';
	227	$this->content->text .= ($numworst == 1?get_string('worstgroupgrade', 'block_quiz_results'):get_string('worstgroupgrades', 'block_quiz_results', $numworst));
	228	$this->content->text .= '</caption><colgroup class="number" /><colgroup class="name" /><colgroup class="grade" /><tbody>';
6b4dc5a3	229	foreach($worst as $groupid => $averagegrade) {
85311ca8	230	switch($nameformat) {
	231	case B_QUIZRESULTS_NAME_FORMAT_ANON:
	232	case B_QUIZRESULTS_NAME_FORMAT_ID:
	233	$thisname = get_string('group');
	234	break;
	235	default:
	236	case B_QUIZRESULTS_NAME_FORMAT_FULL:
	237	$thisname = '<a href="'.$CFG->wwwroot.'/course/group.php?group='.$groupid.'&id='.$courseid.'">'.$groupgrades[$groupid]['group'].'</a>';
	238	break;
	239	}
	240	$this->content->text .= '<tr><td>'.(++$rank).'.</td><td>'.$thisname.'</td><td>';
6b4dc5a3	241	switch($gradeformat) {
85311ca8	242	case B_QUIZRESULTS_GRADE_FORMAT_FRA:
f88fb62c	243	$this->content->text .= quiz_format_grade($quiz, $averagegrade).'/'.$quiz->grade;
6b4dc5a3	244	break;
85311ca8	245	case B_QUIZRESULTS_GRADE_FORMAT_ABS:
f88fb62c	246	$this->content->text .= quiz_format_grade($quiz, $averagegrade);
6b4dc5a3	247	break;
6b4dc5a3	248	default:
85311ca8	249	case B_QUIZRESULTS_GRADE_FORMAT_PCT:
090cf95a	250	$this->content->text .= round((float)$averagegrade / (float)$quiz->grade * 100).'%';
6b4dc5a3	251	break;
	252	}
	253	$this->content->text .= '</td></tr>';
	254	}
	255	$this->content->text .= '</tbody></table>';
	256	}
b35bc4d8	257	break;
6b4dc5a3	258
6b4dc5a3	259
b35bc4d8	260	case SEPARATEGROUPS:
	261	// This is going to be just like no-groups mode, only we 'll filter
	262	// out the grades from people not in our group.
	263	if(empty($USER) \|\| empty($USER->id)) {
	264	// Not logged in, so show nothing
	265	return $this->content;
	266	}
	267
2c386f82	268	$mygroups = groups_get_all_groups($courseid, $USER->id);
b35bc4d8	269	if(empty($mygroups)) {
	270	// Not member of a group, show nothing
	271	return $this->content;
	272	}
	273
7192011c	274	// Get users from the same groups as me.
	275	list($grouptest, $params) = $DB->get_in_or_equal(array_keys($mygroups));
	276	$mygroupsusers = $DB->get_records_sql_menu(
	277	'SELECT DISTINCT userid, 1 FROM {groups_members} WHERE groupid ' . $grouptest,
	278	$params);
b35bc4d8	279
7192011c	280	// Filter out the grades belonging to other users, and proceed as if there were no groups
	281	foreach ($grades as $key => $grade) {
	282	if (!isset($mygroupsusers[$grade->userid])) {
	283	unset($grades[$key]);
	284	}
	285	}
b35bc4d8	286
7192011c	287	// No break, fall through to the default case now we have filtered the $grades array.
b35bc4d8	288	default:
b35bc4d8	289	case NOGROUPS:
98ad7484	290	// Single user mode
6b4dc5a3	291	$numbest = empty($this->config->showbest) ? 0 : min($this->config->showbest, count($grades));
6b4dc5a3	292	$numworst = empty($this->config->showworst) ? 0 : min($this->config->showworst, count($grades) - $numbest);
98ad7484	293
	294	// Collect all the usernames we are going to need
	295	$remaining = $numbest;
	296	$grade = end($grades);
	297	while($remaining--) {
	298	$best[$grade->userid] = $grade->id;
	299	$grade = prev($grades);
	300	}
	301
	302	$remaining = $numworst;
	303	$grade = reset($grades);
	304	while($remaining--) {
	305	$worst[$grade->userid] = $grade->id;
	306	$grade = next($grades);
	307	}
	308
	309	if(empty($best) && empty($worst)) {
	310	// Nothing to show, for some reason...
	311	return $this->content;
	312	}
	313
	314	// Now grab all the users from the database
	315	$userids = array_merge(array_keys($best), array_keys($worst));
44e1b7d7	316	$users = $DB->get_records_list('user', 'id', $userids, '', 'id, firstname, lastname, idnumber');
98ad7484	317
	318	// Ready for output!
	319
85311ca8	320	$gradeformat = intval(empty($this->config->gradeformat) ? B_QUIZRESULTS_GRADE_FORMAT_PCT : $this->config->gradeformat);
98ad7484	321
09fe3652	322	if($this->instance->pagetype != 'mod-quiz-view') {
f58a15de	323	// Don't show header and link to the quiz if we ARE at the quiz...
	324	$this->content->text .= '<h1><a href="'.$CFG->wwwroot.'/mod/quiz/view.php?q='.$quizid.'">'.$quiz->name.'</a></h1>';
	325	}
98ad7484	326
	327	$rank = 0;
	328	if(!empty($best)) {
d9f7e051	329	$this->content->text .= '<table class="grades"><caption>';
	330	$this->content->text .= ($numbest == 1?get_string('bestgrade', 'block_quiz_results'):get_string('bestgrades', 'block_quiz_results', $numbest));
	331	$this->content->text .= '</caption><colgroup class="number" /><colgroup class="name" /><colgroup class="grade" /><tbody>';
98ad7484	332	foreach($best as $userid => $gradeid) {
85311ca8	333	switch($nameformat) {
85311ca8	334	case B_QUIZRESULTS_NAME_FORMAT_ID:
9101efd3	335	$thisname = get_string('user').' '.intval($users[$userid]->idnumber);
85311ca8	336	break;
85311ca8	337	case B_QUIZRESULTS_NAME_FORMAT_ANON:
9101efd3	338	$thisname = get_string('user');
85311ca8	339	break;
	340	default:
	341	case B_QUIZRESULTS_NAME_FORMAT_FULL:
	342	$thisname = '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$userid.'&course='.$courseid.'">'.fullname($users[$userid]).'</a>';
	343	break;
	344	}
	345	$this->content->text .= '<tr><td>'.(++$rank).'.</td><td>'.$thisname.'</td><td>';
98ad7484	346	switch($gradeformat) {
85311ca8	347	case B_QUIZRESULTS_GRADE_FORMAT_FRA:
f88fb62c	348	$this->content->text .= quiz_format_grade($quiz, $grades[$gradeid]->grade).'/'.$quiz->grade;
98ad7484	349	break;
85311ca8	350	case B_QUIZRESULTS_GRADE_FORMAT_ABS:
f88fb62c	351	$this->content->text .= quiz_format_grade($quiz, $grades[$gradeid]->grade);
98ad7484	352	break;
98ad7484	353	default:
85311ca8	354	case B_QUIZRESULTS_GRADE_FORMAT_PCT:
f64fdf3f	355	if ($quiz->grade) {
	356	$this->content->text .= round((float)$grades[$gradeid]->grade / (float)$quiz->grade * 100).'%';
	357	} else {
	358	$this->content->text .= '--%';
	359	}
98ad7484	360	break;
	361	}
	362	$this->content->text .= '</td></tr>';
	363	}
	364	$this->content->text .= '</tbody></table>';
	365	}
	366
	367	$rank = 0;
	368	if(!empty($worst)) {
	369	$worst = array_reverse($worst, true);
d9f7e051	370	$this->content->text .= '<table class="grades"><caption>';
	371	$this->content->text .= ($numworst == 1?get_string('worstgrade', 'block_quiz_results'):get_string('worstgrades', 'block_quiz_results', $numworst));
	372	$this->content->text .= '</caption><colgroup class="number" /><colgroup class="name" /><colgroup class="grade" /><tbody>';
98ad7484	373	foreach($worst as $userid => $gradeid) {
85311ca8	374	switch($nameformat) {
85311ca8	375	case B_QUIZRESULTS_NAME_FORMAT_ID:
9101efd3	376	$thisname = get_string('user').' '.intval($users[$userid]->idnumber);
85311ca8	377	break;
85311ca8	378	case B_QUIZRESULTS_NAME_FORMAT_ANON:
9101efd3	379	$thisname = get_string('user');
85311ca8	380	break;
	381	default:
	382	case B_QUIZRESULTS_NAME_FORMAT_FULL:
	383	$thisname = '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$userid.'&course='.$courseid.'">'.fullname($users[$userid]).'</a>';
	384	break;
	385	}
	386	$this->content->text .= '<tr><td>'.(++$rank).'.</td><td>'.$thisname.'</td><td>';
98ad7484	387	switch($gradeformat) {
85311ca8	388	case B_QUIZRESULTS_GRADE_FORMAT_FRA:
f88fb62c	389	$this->content->text .= quiz_format_grade($quiz, $grades[$gradeid]->grade).'/'.$quiz->grade;
98ad7484	390	break;
85311ca8	391	case B_QUIZRESULTS_GRADE_FORMAT_ABS:
f88fb62c	392	$this->content->text .= quiz_format_grade($quiz, $grades[$gradeid]->grade);
98ad7484	393	break;
98ad7484	394	default:
85311ca8	395	case B_QUIZRESULTS_GRADE_FORMAT_PCT:
090cf95a	396	$this->content->text .= round((float)$grades[$gradeid]->grade / (float)$quiz->grade * 100).'%';
98ad7484	397	break;
	398	}
	399	$this->content->text .= '</td></tr>';
	400	}
	401	$this->content->text .= '</tbody></table>';
	402	}
b35bc4d8	403	break;
98ad7484	404	}
98ad7484	405
98ad7484	406	return $this->content;
	407	}
	408
63927672	409	function instance_allow_multiple() {
98ad7484	410	return true;
	411	}
	412	}
	413
	414	?>