PHP quiz_get_reviewoptions函数代码示例

/**
 * Combines the review options from a number of different quiz attempts.
 * Returns an array of two ojects, so he suggested way of calling this
 * funciton is:
 * list($someoptions, $alloptions) = quiz_get_combined_reviewoptions(...)
 *
 * @param object $quiz the quiz instance.
 * @param array $attempts an array of attempt objects.
 * @param $context the roles and permissions context,
 *          normally the context for the quiz module instance.
 *
 * @return array of two options objects, one showing which options are true for
 *          at least one of the attempts, the other showing which options are true
 *          for all attempts.
 */
function quiz_get_combined_reviewoptions($quiz, $attempts, $context = null)
{
    $fields = array('readonly', 'scores', 'feedback', 'correct_responses', 'solutions', 'generalfeedback', 'overallfeedback');
    $someoptions = new stdClass();
    $alloptions = new stdClass();
    foreach ($fields as $field) {
        $someoptions->{$field} = false;
        $alloptions->{$field} = true;
    }
    foreach ($attempts as $attempt) {
        $attemptoptions = quiz_get_reviewoptions($quiz, $attempt, $context);
        foreach ($fields as $field) {
            $someoptions->{$field} = $someoptions->{$field} || $attemptoptions->{$field};
            $alloptions->{$field} = $alloptions->{$field} && $attemptoptions->{$field};
        }
    }
    return array($someoptions, $alloptions);
}

     $table->align[] = 'center';
     $table->size[] = '';
 }
 if ($feedbackcolumn) {
     $table->head[] = get_string('feedback', 'quiz');
     $table->align[] = 'left';
     $table->size[] = '';
 }
 if (isset($quiz->showtimetaken)) {
     $table->head[] = get_string('timetaken', 'quiz');
     $table->align[] = 'left';
     $table->size[] = '';
 }
 // One row for each attempt
 foreach ($attempts as $attempt) {
     $attemptoptions = quiz_get_reviewoptions($quiz, $attempt, $context);
     $row = array();
     // Add the attempt number, making it a link, if appropriate.
     if ($attemptcolumn) {
         if ($attempt->preview) {
             $row[] = get_string('preview', 'quiz');
         } else {
             $row[] = $attempt->attempt;
         }
     }
     // prepare strings for time taken and date completed
     $timetaken = '';
     $datecompleted = '';
     if ($attempt->timefinish > 0) {
         // attempt has finished
         $timetaken = format_time($attempt->timefinish - $attempt->timestart);

 /**
  * Display the report.
  */
 function display($quiz, $cm, $course)
 {
     global $CFG, $COURSE, $DB, $PAGE, $OUTPUT;
     $context = get_context_instance(CONTEXT_MODULE, $cm->id);
     // Work out some display options - whether there is feedback, and whether scores should be shown.
     $hasfeedback = quiz_has_feedback($quiz);
     $fakeattempt = new stdClass();
     $fakeattempt->preview = false;
     $fakeattempt->timefinish = $quiz->timeopen;
     $fakeattempt->userid = 0;
     $reviewoptions = quiz_get_reviewoptions($quiz, $fakeattempt, $context);
     $showgrades = quiz_has_grades($quiz) && $reviewoptions->scores;
     $download = optional_param('download', '', PARAM_ALPHA);
     if ($attemptids = optional_param('attemptid', array(), PARAM_INT)) {
         //attempts need to be deleted
         require_capability('mod/quiz:deleteattempts', $context);
         $attemptids = optional_param('attemptid', array(), PARAM_INT);
         foreach ($attemptids as $attemptid) {
             add_to_log($course->id, 'quiz', 'delete attempt', 'report.php?id=' . $cm->id, $attemptid, $cm->id);
             quiz_delete_attempt($attemptid, $quiz);
         }
         //No need for a redirect, any attemptids that do not exist are ignored.
         //So no problem if the user refreshes and tries to delete the same attempts
         //twice.
     }
     $pageoptions = array();
     $pageoptions['id'] = $cm->id;
     $pageoptions['q'] = $quiz->id;
     $pageoptions['mode'] = 'responses';
     $reporturl = new moodle_url($CFG->wwwroot . '/mod/quiz/report.php', $pageoptions);
     $qmsubselect = quiz_report_qm_filter_select($quiz);
     /// find out current groups mode
     $currentgroup = groups_get_activity_group($cm, true);
     $mform = new mod_quiz_report_responses_settings($reporturl, array('qmsubselect' => $qmsubselect, 'quiz' => $quiz, 'currentgroup' => $currentgroup));
     if ($fromform = $mform->get_data()) {
         $attemptsmode = $fromform->attemptsmode;
         if ($qmsubselect) {
             //control is not on the form if
             //the grading method is not set
             //to grade one attempt per user eg. for average attempt grade.
             $qmfilter = $fromform->qmfilter;
         } else {
             $qmfilter = 0;
         }
         set_user_preference('quiz_report_pagesize', $fromform->pagesize);
         $pagesize = $fromform->pagesize;
     } else {
         $qmfilter = optional_param('qmfilter', 0, PARAM_INT);
         $attemptsmode = optional_param('attemptsmode', null, PARAM_INT);
         if ($attemptsmode === null) {
             //default
             $attemptsmode = QUIZ_REPORT_ATTEMPTS_ALL;
         } else {
             if ($currentgroup) {
                 //default for when a group is selected
                 if ($attemptsmode === null || $attemptsmode == QUIZ_REPORT_ATTEMPTS_ALL) {
                     $attemptsmode = QUIZ_REPORT_ATTEMPTS_STUDENTS_WITH;
                 }
             } else {
                 if (!$currentgroup && $course->id == SITEID) {
                     //force report on front page to show all, unless a group is selected.
                     $attemptsmode = QUIZ_REPORT_ATTEMPTS_ALL;
                 }
             }
         }
         $pagesize = get_user_preferences('quiz_report_pagesize', 0);
     }
     if ($pagesize < 1) {
         $pagesize = QUIZ_REPORT_DEFAULT_PAGE_SIZE;
     }
     // We only want to show the checkbox to delete attempts
     // if the user has permissions and if the report mode is showing attempts.
     $candelete = has_capability('mod/quiz:deleteattempts', $context) && $attemptsmode != QUIZ_REPORT_ATTEMPTS_STUDENTS_WITH_NO;
     $displayoptions = array();
     $displayoptions['attemptsmode'] = $attemptsmode;
     $displayoptions['qmfilter'] = $qmfilter;
     //work out the sql for this table.
     if (!($students = get_users_by_capability($context, array('mod/quiz:reviewmyattempts', 'mod/quiz:attempt'), '', '', '', '', '', '', false))) {
         $students = array();
     } else {
         $students = array_keys($students);
     }
     if (empty($currentgroup)) {
         // all users who can attempt quizzes
         $allowed = $students;
         $groupstudents = array();
     } else {
         // all users who can attempt quizzes and who are in the currently selected group
         if (!($groupstudents = get_users_by_capability($context, array('mod/quiz:reviewmyattempts', 'mod/quiz:attempt'), '', '', '', '', $currentgroup, '', false))) {
             $groupstudents = array();
         } else {
             $groupstudents = array_keys($groupstudents);
         }
         $allowed = $groupstudents;
     }
     $questions = quiz_report_load_questions($quiz);
     $table = new quiz_report_responses_table($quiz, $qmsubselect, $groupstudents, $students, $questions, $candelete, $reporturl, $displayoptions);
//.........这里部分代码省略.........

 /**
  * Prints questions with comment and grade form underneath each question
  *
  * @return void
  * @todo Finish documenting this function
  **/
 function print_questions_and_form($quiz, $question, $userid, $attemptid, $gradeungraded, $gradenextungraded, $ungraded)
 {
     global $CFG;
     // TODO get the context, and put in proper roles an permissions checks.
     $context = NULL;
     $questions[$question->id] =& $question;
     $usehtmleditor = can_use_richtext_editor();
     list($select, $from, $where) = $this->attempts_sql($quiz->id, false, $question->id, $userid, $attemptid, $gradeungraded, $gradenextungraded);
     $sort = 'ORDER BY u.firstname, u.lastname, qa.attempt ASC';
     if ($gradenextungraded) {
         $attempts = get_records_sql($select . $from . $where . $sort, 0, QUIZ_REPORT_DEFAULT_GRADING_PAGE_SIZE);
     } else {
         $attempts = get_records_sql($select . $from . $where . $sort);
     }
     if ($attempts) {
         $firstattempt = current($attempts);
         $fullname = fullname($firstattempt);
         if ($gradeungraded) {
             // getting all ungraded attempts
             print_heading(get_string('gradingungraded', 'quiz_grading', $ungraded), '', 3);
         } else {
             if ($gradenextungraded) {
                 // getting next ungraded attempts
                 print_heading(get_string('gradingnextungraded', 'quiz_grading', QUIZ_REPORT_DEFAULT_GRADING_PAGE_SIZE), '', 3);
             } else {
                 if ($userid) {
                     print_heading(get_string('gradinguser', 'quiz_grading', $fullname), '', 3);
                 } else {
                     if ($attemptid) {
                         $a = new object();
                         $a->fullname = $fullname;
                         $a->attempt = $firstattempt->attempt;
                         print_heading(get_string('gradingattempt', 'quiz_grading', $a), '', 3);
                     } else {
                         print_heading(get_string('gradingall', 'quiz_grading', count($attempts)), '', 3);
                     }
                 }
             }
         }
         // Display the form with one part for each selected attempt
         echo '<form method="post" action="report.php">' . '<input type="hidden" name="mode" value="grading" />' . '<input type="hidden" name="q" value="' . $quiz->id . '" />' . '<input type="hidden" name="sesskey" value="' . sesskey() . '" />' . '<input type="hidden" name="questionid" value="' . $question->id . '" />';
         foreach ($attempts as $attempt) {
             // Load the state for this attempt (The questions array was created earlier)
             $states = get_question_states($questions, $quiz, $attempt);
             // The $states array is indexed by question id but because we are dealing
             // with only one question there is only one entry in this array
             $state =& $states[$question->id];
             $options = quiz_get_reviewoptions($quiz, $attempt, $context);
             unset($options->questioncommentlink);
             $options->noeditlink = true;
             $copy = $state->manualcomment;
             $state->manualcomment = '';
             $options->readonly = 1;
             $gradedclass = question_state_is_graded($state) ? ' class="highlightgraded" ' : '';
             $gradedstring = question_state_is_graded($state) ? ' ' . get_string('graded', 'quiz_grading') : '';
             $a = new object();
             $a->fullname = fullname($attempt, true);
             $a->attempt = $attempt->attempt;
             // print the user name, attempt count, the question, and some more hidden fields
             echo '<div class="boxaligncenter" width="80%" style="clear:left;padding:15px;">';
             echo "<span{$gradedclass}>" . get_string('gradingattempt', 'quiz_grading', $a);
             echo $gradedstring . "</span>";
             print_question($question, $state, '', $quiz, $options);
             $prefix = "manualgrades[{$attempt->uniqueid}]";
             if (!question_state_is_graded($state)) {
                 $grade = '';
             } else {
                 $grade = round($state->last_graded->grade, 3);
             }
             $state->manualcomment = $copy;
             include $CFG->dirroot . '/question/comment.html';
             echo '</div>';
         }
         echo '<div class="boxaligncenter"><input type="submit" value="' . get_string('savechanges') . '" /></div>' . '</form>';
         if ($usehtmleditor) {
             use_html_editor();
         }
     } else {
         notify(get_string('noattemptstoshow', 'quiz'));
     }
 }

/**
 * Returns all quiz graded users since a given time for specified quiz
 */
function quiz_get_recent_mod_activity(&$activities, &$index, $timestart, $courseid, $cmid, $userid = 0, $groupid = 0)
{
    global $CFG, $COURSE, $USER;
    require_once 'locallib.php';
    if ($COURSE->id == $courseid) {
        $course = $COURSE;
    } else {
        $course = get_record('course', 'id', $courseid);
    }
    $modinfo =& get_fast_modinfo($course);
    $cm = $modinfo->cms[$cmid];
    $quiz = get_record('quiz', 'id', $cm->instance);
    if ($userid) {
        $userselect = "AND u.id = {$userid}";
    } else {
        $userselect = '';
    }
    if ($groupid) {
        $groupselect = "AND gm.groupid = {$groupid}";
        $groupjoin = "JOIN {$CFG->prefix}groups_members gm ON  gm.userid = u.id";
    } else {
        $groupselect = '';
        $groupjoin = '';
    }
    if (!($attempts = get_records_sql("\n              SELECT qa.*,\n                     u.firstname, u.lastname, u.email, u.picture, u.imagealt\n                FROM {$CFG->prefix}quiz_attempts qa\n                     JOIN {$CFG->prefix}user u ON u.id = qa.userid\n                     {$groupjoin}\n               WHERE qa.timefinish > {$timestart}\n                 AND qa.quiz = {$quiz->id}\n                 AND qa.preview = 0\n                     {$userselect}\n                     {$groupselect}\n            ORDER BY qa.timefinish ASC"))) {
        return;
    }
    $context = get_context_instance(CONTEXT_MODULE, $cm->id);
    $accessallgroups = has_capability('moodle/site:accessallgroups', $context);
    $viewfullnames = has_capability('moodle/site:viewfullnames', $context);
    $grader = has_capability('mod/quiz:viewreports', $context);
    $groupmode = groups_get_activity_groupmode($cm, $course);
    if (is_null($modinfo->groups)) {
        $modinfo->groups = groups_get_user_groups($course->id);
        // load all my groups and cache it in modinfo
    }
    $hasgrades = $quiz->grade != 0 && $quiz->sumgrades != 0;
    $usersgroups = null;
    $aname = format_string($cm->name, true);
    foreach ($attempts as $attempt) {
        if ($attempt->userid != $USER->id) {
            if (!$grader) {
                // Grade permission required
                continue;
            }
            if ($groupmode == SEPARATEGROUPS and !$accessallgroups) {
                if (is_null($usersgroups)) {
                    $usersgroups = groups_get_all_groups($course->id, $attempt->userid, $cm->groupingid);
                    if (is_array($usersgroups)) {
                        $usersgroups = array_keys($usersgroups);
                    } else {
                        $usersgroups = array();
                    }
                }
                if (!array_intersect($usersgroups, $modinfo->groups[$cm->id])) {
                    continue;
                }
            }
        }
        $options = quiz_get_reviewoptions($quiz, $attempt, $context);
        $tmpactivity = new stdClass();
        $tmpactivity->type = 'quiz';
        $tmpactivity->cmid = $cm->id;
        $tmpactivity->name = $aname;
        $tmpactivity->sectionnum = $cm->sectionnum;
        $tmpactivity->timestamp = $attempt->timefinish;
        $tmpactivity->content->attemptid = $attempt->id;
        $tmpactivity->content->attempt = $attempt->attempt;
        if ($hasgrades && $options->scores) {
            $tmpactivity->content->sumgrades = round($attempt->sumgrades, $quiz->decimalpoints);
            $tmpactivity->content->maxgrade = round($quiz->sumgrades, $quiz->decimalpoints);
        } else {
            $tmpactivity->content->sumgrades = null;
            $tmpactivity->content->maxgrade = null;
        }
        $tmpactivity->user->userid = $attempt->userid;
        $tmpactivity->user->fullname = fullname($attempt, $viewfullnames);
        $tmpactivity->user->picture = $attempt->picture;
        $tmpactivity->user->imagealt = $attempt->imagealt;
        $activities[$index++] = $tmpactivity;
    }
    return;
}

    /**
     * Display the report.
     */
    function display($quiz, $cm, $course) {
        global $CFG, $COURSE, $DB, $OUTPUT;

        $this->context = get_context_instance(CONTEXT_MODULE, $cm->id);

        // Work out some display options - whether there is feedback, and whether scores should be shown.
        $hasfeedback = quiz_has_feedback($quiz);
        $fakeattempt = new stdClass();
        $fakeattempt->preview = false;
        $fakeattempt->timefinish = $quiz->timeopen;
        $fakeattempt->userid = 0;
        $reviewoptions = quiz_get_reviewoptions($quiz, $fakeattempt, $this->context);
        $showgrades = quiz_has_grades($quiz) && $reviewoptions->scores;

        $download = optional_param('download', '', PARAM_ALPHA);

        /// find out current groups mode
        $currentgroup = groups_get_activity_group($cm, true);
        if (!$students = get_users_by_capability($this->context, array('mod/quiz:reviewmyattempts', 'mod/quiz:attempt'),'u.id,1','','','','','',false)) {
            $students = array();
        } else {
            $students = array_keys($students);
        }

        if (empty($currentgroup)) {
            // all users who can attempt quizzes
            $allowed = $students;
            $groupstudents = array();
        } else {
            // all users who can attempt quizzes and who are in the currently selected group
            if (!$groupstudents = get_users_by_capability($this->context, array('mod/quiz:reviewmyattempts', 'mod/quiz:attempt'),'u.id,1','','','',$currentgroup,'',false)) {
                $groupstudents = array();
            } else {
                $groupstudents = array_keys($groupstudents);
            }
            $allowed = $groupstudents;
        }

        $pageoptions = array();
        $pageoptions['id'] = $cm->id;
        $pageoptions['mode'] = 'overview';

        $reporturl = new moodle_url('/mod/quiz/report.php', $pageoptions);
        $qmsubselect = quiz_report_qm_filter_select($quiz);

        $mform = new mod_quiz_report_overview_settings($reporturl, array('qmsubselect'=> $qmsubselect, 'quiz'=>$quiz,
                                                             'currentgroup'=>$currentgroup, 'context'=>$this->context));
        if ($fromform = $mform->get_data()) {
            $regradeall = false;
            $regradealldry = false;
            $regradealldrydo = false;
            $attemptsmode = $fromform->attemptsmode;
            if ($qmsubselect) {
                //control is not on the form if
                //the grading method is not set
                //to grade one attempt per user eg. for average attempt grade.
                $qmfilter = $fromform->qmfilter;
            } else {
                $qmfilter = 0;
            }
            $regradefilter = $fromform->regradefilter;
            set_user_preference('quiz_report_overview_detailedmarks', $fromform->detailedmarks);
            set_user_preference('quiz_report_pagesize', $fromform->pagesize);
            $detailedmarks = $fromform->detailedmarks;
            $pagesize = $fromform->pagesize;
        } else {
            $regradeall  = optional_param('regradeall', 0, PARAM_BOOL);
            $regradealldry  = optional_param('regradealldry', 0, PARAM_BOOL);
            $regradealldrydo  = optional_param('regradealldrydo', 0, PARAM_BOOL);
            $attemptsmode = optional_param('attemptsmode', null, PARAM_INT);
            if ($qmsubselect) {
                $qmfilter = optional_param('qmfilter', 0, PARAM_INT);
            } else {
                $qmfilter = 0;
            }
            $regradefilter = optional_param('regradefilter', 0, PARAM_INT);

            $detailedmarks = get_user_preferences('quiz_report_overview_detailedmarks', 1);
            $pagesize = get_user_preferences('quiz_report_pagesize', 0);
        }
        if ($currentgroup) {
            //default for when a group is selected
            if ($attemptsmode === null  || $attemptsmode == QUIZ_REPORT_ATTEMPTS_ALL) {
                $attemptsmode = QUIZ_REPORT_ATTEMPTS_STUDENTS_WITH;
            }
        } else if (!$currentgroup && $course->id == SITEID) {
            //force report on front page to show all, unless a group is selected.
            $attemptsmode = QUIZ_REPORT_ATTEMPTS_ALL;
        } else if ($attemptsmode === null) {
            //default
            $attemptsmode = QUIZ_REPORT_ATTEMPTS_ALL;
        }
        if (!$reviewoptions->scores) {
            $detailedmarks = 0;
        }
        if ($pagesize < 1) {
            $pagesize = QUIZ_REPORT_DEFAULT_PAGE_SIZE;
//.........这里部分代码省略.........

 /**
  * Display the report.
  */
 function display($quiz, $cm, $course)
 {
     global $CFG, $db;
     // Define some strings
     $strreallydel = addslashes(get_string('deleteattemptcheck', 'quiz'));
     $strtimeformat = get_string('strftimedatetime');
     $strreviewquestion = get_string('reviewresponse', 'quiz');
     $context = get_context_instance(CONTEXT_MODULE, $cm->id);
     // Only print headers if not asked to download data
     if (!($download = optional_param('download', NULL))) {
         $this->print_header_and_tabs($cm, $course, $quiz, "overview");
     }
     if ($attemptids = optional_param('attemptid', array(), PARAM_INT)) {
         //attempts need to be deleted
         require_capability('mod/quiz:deleteattempts', $context);
         $attemptids = optional_param('attemptid', array(), PARAM_INT);
         foreach ($attemptids as $attemptid) {
             add_to_log($course->id, 'quiz', 'delete attempt', 'report.php?id=' . $cm->id, $attemptid, $cm->id);
             quiz_delete_attempt($attemptid, $quiz);
         }
         //No need for a redirect, any attemptids that do not exist are ignored.
         //So no problem if the user refreshes and tries to delete the same attempts
         //twice.
     }
     // Work out some display options - whether there is feedback, and whether scores should be shown.
     $hasfeedback = quiz_has_feedback($quiz->id) && $quiz->grade > 1.0E-7 && $quiz->sumgrades > 1.0E-7;
     $fakeattempt = new stdClass();
     $fakeattempt->preview = false;
     $fakeattempt->timefinish = $quiz->timeopen;
     $reviewoptions = quiz_get_reviewoptions($quiz, $fakeattempt, $context);
     $showgrades = $quiz->grade && $quiz->sumgrades && $reviewoptions->scores;
     $pageoptions = array();
     $pageoptions['id'] = $cm->id;
     $pageoptions['q'] = $quiz->id;
     $pageoptions['mode'] = 'overview';
     /// find out current groups mode
     $currentgroup = groups_get_activity_group($cm, true);
     $reporturl = new moodle_url($CFG->wwwroot . '/mod/quiz/report.php', $pageoptions);
     $qmsubselect = quiz_report_qm_filter_select($quiz);
     $mform = new mod_quiz_report_overview_settings($reporturl, compact('qmsubselect', 'quiz', 'currentgroup'));
     if ($fromform = $mform->get_data()) {
         $attemptsmode = $fromform->attemptsmode;
         if ($qmsubselect) {
             //control is not on the form if
             //the grading method is not set
             //to grade one attempt per user eg. for average attempt grade.
             $qmfilter = $fromform->qmfilter;
         } else {
             $qmfilter = 0;
         }
         set_user_preference('quiz_report_overview_detailedmarks', $fromform->detailedmarks);
         set_user_preference('quiz_report_pagesize', $fromform->pagesize);
         $detailedmarks = $fromform->detailedmarks;
         $pagesize = $fromform->pagesize;
     } else {
         $qmfilter = optional_param('qmfilter', 0, PARAM_INT);
         $attemptsmode = optional_param('attemptsmode', QUIZ_REPORT_ATTEMPTS_ALL, PARAM_INT);
         $detailedmarks = get_user_preferences('quiz_report_overview_detailedmarks', 1);
         $pagesize = get_user_preferences('quiz_report_pagesize', 0);
     }
     if ($attemptsmode == QUIZ_REPORT_ATTEMPTS_ALL && $currentgroup) {
         $attemptsmode = QUIZ_REPORT_ATTEMPTS_STUDENTS_WITH;
     }
     if (!$reviewoptions->scores) {
         $detailedmarks = 0;
     }
     if ($pagesize < 1) {
         $pagesize = QUIZ_REPORT_DEFAULT_PAGE_SIZE;
     }
     // We only want to show the checkbox to delete attempts
     // if the user has permissions and if the report mode is showing attempts.
     $candelete = has_capability('mod/quiz:deleteattempts', $context) && $attemptsmode != QUIZ_REPORT_ATTEMPTS_STUDENTS_WITH_NO;
     $displayoptions = array();
     $displayoptions['attemptsmode'] = $attemptsmode;
     $displayoptions['qmfilter'] = $qmfilter;
     $reporturlwithdisplayoptions = new moodle_url($CFG->wwwroot . '/mod/quiz/report.php', $pageoptions + $displayoptions);
     if ($groupmode = groups_get_activity_groupmode($cm)) {
         // Groups are being used
         if (!$download) {
             groups_print_activity_menu($cm, $reporturlwithdisplayoptions->out());
         }
     }
     // Print information on the number of existing attempts
     if (!$download) {
         //do not print notices when downloading
         if ($strattemptnum = quiz_num_attempt_summary($quiz, $cm, true, $currentgroup)) {
             echo '<div class="quizattemptcounts">' . $strattemptnum . '</div>';
         }
     }
     $nostudents = false;
     if (!($students = get_users_by_capability($context, array('mod/quiz:reviewmyattempts', 'mod/quiz:attempt'), '', '', '', '', '', '', false))) {
         notify(get_string('nostudentsyet'));
         $nostudents = true;
         $studentslist = '';
     } else {
         $studentslist = join(',', array_keys($students));
     }
//.........这里部分代码省略.........

 /**
  * Prints questions with comment and grade form underneath each question
  *
  * @return void
  * @todo Finish documenting this function
  **/
 function print_questions_and_form($quiz, $question)
 {
     global $CFG, $db;
     // grade question specific parameters
     $gradeall = optional_param('gradeall', 0, PARAM_INT);
     $userid = optional_param('userid', 0, PARAM_INT);
     $attemptid = optional_param('attemptid', 0, PARAM_INT);
     // TODO get the context, and put in proper roles an permissions checks.
     $context = NULL;
     $questions[$question->id] =& $question;
     $usehtmleditor = can_use_richtext_editor();
     $users = get_course_students($quiz->course);
     $userids = implode(',', array_keys($users));
     // this sql joins the attempts table and the user table
     $select = 'SELECT ' . sql_concat('u.id', '\'#\'', $db->IfNull('qa.attempt', '0')) . ' AS userattemptid,
                 qa.id AS attemptid, qa.uniqueid, qa.attempt, qa.timefinish, qa.preview,
                 u.id AS userid, u.firstname, u.lastname, u.picture ';
     $from = 'FROM ' . $CFG->prefix . 'user u LEFT JOIN ' . $CFG->prefix . 'quiz_attempts qa ON (u.id = qa.userid AND qa.quiz = ' . $quiz->id . ') ';
     if ($gradeall) {
         // get all user attempts
         $where = 'WHERE u.id IN (' . $userids . ') ';
     } else {
         if ($userid) {
             // get all the attempts for a specific user
             $where = 'WHERE u.id=' . $userid . ' ';
         } else {
             // get a specific attempt
             $where = 'WHERE qa.id=' . $attemptid . ' ';
         }
     }
     // ignore previews
     $where .= ' AND preview = 0 ';
     $where .= 'AND ' . $db->IfNull('qa.attempt', '0') . ' != 0 ';
     $where .= 'AND ' . $db->IfNull('qa.timefinish', '0') . ' != 0 ';
     $sort = 'ORDER BY u.firstname, u.lastname, qa.attempt ASC';
     $attempts = get_records_sql($select . $from . $where . $sort);
     // Display the form with one part for each selected attempt
     echo '<form method="post" action="report.php">' . '<input type="hidden" name="mode" value="grading" />' . '<input type="hidden" name="q" value="' . $quiz->id . '" />' . '<input type="hidden" name="sesskey" value="' . sesskey() . '" />' . '<input type="hidden" name="action" value="viewquestion" />' . '<input type="hidden" name="questionid" value="' . $question->id . '" />';
     foreach ($attempts as $attempt) {
         // Load the state for this attempt (The questions array was created earlier)
         $states = get_question_states($questions, $quiz, $attempt);
         // The $states array is indexed by question id but because we are dealing
         // with only one question there is only one entry in this array
         $state =& $states[$question->id];
         $options = quiz_get_reviewoptions($quiz, $attempt, $context);
         unset($options->questioncommentlink);
         $copy = $state->manualcomment;
         $state->manualcomment = '';
         $options->readonly = 1;
         // print the user name, attempt count, the question, and some more hidden fields
         echo '<div class="boxaligncenter" width="80%" style="padding:15px;">' . fullname($attempt, true) . ': ' . get_string('attempt', 'quiz') . $attempt->attempt;
         print_question($question, $state, '', $quiz, $options);
         $prefix = "manualgrades[{$attempt->uniqueid}]";
         $grade = round($state->last_graded->grade, 3);
         $state->manualcomment = $copy;
         include $CFG->dirroot . '/question/comment.html';
         echo '</div>';
     }
     echo '<div class="boxaligncenter"><input type="submit" value="' . get_string('savechanges') . '" /></div>' . '</form>';
     if ($usehtmleditor) {
         use_html_editor();
     }
 }

 /**
  * Prints questions with comment and grade form underneath each question
  *
  * @return void
  * @todo Finish documenting this function
  **/
 function print_questions_and_form($quiz, $question, $userid, $attemptid, $gradeungraded, $gradenextungraded, $ungraded)
 {
     global $CFG, $DB, $OUTPUT;
     $context = get_context_instance(CONTEXT_MODULE, $this->cm->id);
     $questions[$question->id] =& $question;
     $usehtmleditor = can_use_html_editor();
     list($select, $from, $where, $params) = $this->attempts_sql($quiz->id, false, $question->id, $userid, $attemptid, $gradeungraded, $gradenextungraded);
     $sort = 'ORDER BY u.firstname, u.lastname, qa.attempt ASC';
     if ($gradenextungraded) {
         $attempts = $DB->get_records_sql($select . $from . $where . $sort, $params, 0, QUIZ_REPORT_DEFAULT_GRADING_PAGE_SIZE);
     } else {
         $attempts = $DB->get_records_sql($select . $from . $where . $sort, $params);
     }
     if ($attempts) {
         $firstattempt = current($attempts);
         $fullname = fullname($firstattempt);
         if ($gradeungraded) {
             // getting all ungraded attempts
             echo $OUTPUT->heading(get_string('gradingungraded', 'quiz_grading', $ungraded), 3);
         } else {
             if ($gradenextungraded) {
                 // getting next ungraded attempts
                 echo $OUTPUT->heading(get_string('gradingnextungraded', 'quiz_grading', QUIZ_REPORT_DEFAULT_GRADING_PAGE_SIZE), 3);
             } else {
                 if ($userid) {
                     echo $OUTPUT->heading(get_string('gradinguser', 'quiz_grading', $fullname), 3);
                 } else {
                     if ($attemptid) {
                         $a = new object();
                         $a->fullname = $fullname;
                         $a->attempt = $firstattempt->attempt;
                         echo $OUTPUT->heading(get_string('gradingattempt', 'quiz_grading', $a), 3);
                     } else {
                         echo $OUTPUT->heading(get_string('gradingall', 'quiz_grading', count($attempts)), 3);
                     }
                 }
             }
         }
         // Display the form with one part for each selected attempt
         echo '<form method="post" action="report.php" class="mform" id="manualgradingform">' . '<input type="hidden" name="mode" value="grading" />' . '<input type="hidden" name="q" value="' . $quiz->id . '" />' . '<input type="hidden" name="sesskey" value="' . sesskey() . '" />' . '<input type="hidden" name="questionid" value="' . $question->id . '" />';
         foreach ($attempts as $attempt) {
             // Load the state for this attempt (The questions array was created earlier)
             $states = get_question_states($questions, $quiz, $attempt);
             // The $states array is indexed by question id but because we are dealing
             // with only one question there is only one entry in this array
             $state =& $states[$question->id];
             $options = quiz_get_reviewoptions($quiz, $attempt, $context);
             unset($options->questioncommentlink);
             $options->readonly = 1;
             if (question_state_is_graded($state)) {
                 $gradedclass = 'main highlightgraded';
                 $gradedstring = ' ' . get_string('graded', 'quiz_grading');
             } else {
                 $gradedclass = 'main';
                 $gradedstring = '';
             }
             $a = new object();
             $a->fullname = fullname($attempt, true);
             $a->attempt = $attempt->attempt;
             // print the user name, attempt count, the question, and some more hidden fields
             echo '<div class="boxaligncenter" width="80%" style="clear:left;padding:15px;">';
             echo $OUTPUT->heading(get_string('gradingattempt', 'quiz_grading', $a) . $gradedstring, 3, $gradedclass);
             // Print the question, without showing any previous comment.
             $copy = $state->manualcomment;
             $state->manualcomment = '';
             $options->noeditlink = true;
             print_question($question, $state, '', $quiz, $options);
             // The print the comment and grade fields, putting back the previous comment.
             $state->manualcomment = $copy;
             question_print_comment_fields($question, $state, 'manualgrades[' . $attempt->uniqueid . ']', $quiz, get_string('manualgrading', 'quiz'));
             echo '</div>';
         }
         echo '<div class="boxaligncenter"><input type="submit" value="' . get_string('savechanges') . '" /></div>' . '</form>';
     } else {
         echo $OUTPUT->notification(get_string('noattemptstoshow', 'quiz'));
     }
 }

/**
 * Returns all quiz graded users since a given time for specified quiz
 */
function quiz_get_recent_mod_activity(&$activities, &$index, $timestart,
        $courseid, $cmid, $userid = 0, $groupid = 0) {
    global $CFG, $COURSE, $USER, $DB;
    require_once('locallib.php');

    if ($COURSE->id == $courseid) {
        $course = $COURSE;
    } else {
        $course = $DB->get_record('course', array('id' => $courseid));
    }

    $modinfo =& get_fast_modinfo($course);

    $cm = $modinfo->cms[$cmid];
    $quiz = $DB->get_record('quiz', array('id' => $cm->instance));

    if ($userid) {
        $userselect = "AND u.id = :userid";
        $params['userid'] = $userid;
    } else {
        $userselect = '';
    }

    if ($groupid) {
        $groupselect = 'AND gm.groupid = :groupid';
        $groupjoin   = 'JOIN {groups_members} gm ON  gm.userid=u.id';
        $params['groupid'] = $groupid;
    } else {
        $groupselect = '';
        $groupjoin   = '';
    }

    $params['timestart'] = $timestart;
    $params['quizid'] = $quiz->id;

    if (!$attempts = $DB->get_records_sql("
              SELECT qa.*,
                     u.firstname, u.lastname, u.email, u.picture, u.imagealt
                FROM {quiz_attempts} qa
                     JOIN {user} u ON u.id = qa.userid
                     $groupjoin
               WHERE qa.timefinish > :timestart
                 AND qa.quiz = :quizid
                 AND qa.preview = 0
                     $userselect
                     $groupselect
            ORDER BY qa.timefinish ASC", $params)) {
        return;
    }

    $context         = get_context_instance(CONTEXT_MODULE, $cm->id);
    $accessallgroups = has_capability('moodle/site:accessallgroups', $context);
    $viewfullnames   = has_capability('moodle/site:viewfullnames', $context);
    $grader          = has_capability('mod/quiz:viewreports', $context);
    $groupmode       = groups_get_activity_groupmode($cm, $course);

    if (is_null($modinfo->groups)) {
        $modinfo->groups = groups_get_user_groups($course->id); // load all my groups and cache it in modinfo
    }

    $usersgroups = null;
    $aname = format_string($cm->name,true);
    foreach ($attempts as $attempt) {
        if ($attempt->userid != $USER->id) {
            if (!$grader) {
                // Grade permission required
                continue;
            }

            if ($groupmode == SEPARATEGROUPS and !$accessallgroups) {
                if (is_null($usersgroups)) {
                    $usersgroups = groups_get_all_groups($course->id,
                            $attempt->userid, $cm->groupingid);
                    if (is_array($usersgroups)) {
                        $usersgroups = array_keys($usersgroups);
                    } else {
                        $usersgroups = array();
                    }
                }
                if (!array_intersect($usersgroups, $modinfo->groups[$cm->id])) {
                    continue;
                }
            }
        }

        $options = quiz_get_reviewoptions($quiz, $attempt, $context);

        $tmpactivity = new stdClass;

        $tmpactivity->type       = 'quiz';
        $tmpactivity->cmid       = $cm->id;
        $tmpactivity->name       = $aname;
        $tmpactivity->sectionnum = $cm->sectionnum;
        $tmpactivity->timestamp  = $attempt->timefinish;

        $tmpactivity->content->attemptid = $attempt->id;
        $tmpactivity->content->attempt   = $attempt->attempt;
//.........这里部分代码省略.........

 /**
  * Wrapper that calls quiz_get_reviewoptions with the appropriate arguments.
  *
  * @return object the review options for this user on this attempt.
  */
 public function get_review_options()
 {
     if (is_null($this->reviewoptions)) {
         $this->reviewoptions = quiz_get_reviewoptions($this->quiz, $this->attempt, $this->context);
     }
     return $this->reviewoptions;
 }