function print_entry($course)
 {
     global $CFG, $USER;
     $strloginto = get_string("loginto", "", $course->shortname);
     $strcourses = get_string("courses");
     $teacher = get_teacher($course->id);
     if ((double) $course->cost < 0) {
         $cost = (double) $CFG->enrol_cost;
     } else {
         $cost = (double) $course->cost;
     }
     if (abs($cost) < 0.01) {
         // no cost, default to base class entry to course
         $manual = enrolment_factory::factory('manual');
         $manual->print_entry($course);
     } else {
         $navlinks = array();
         $navlinks[] = array('name' => $strcourses, 'link' => "{$CFG->wwwroot}/course", 'type' => 'misc');
         $navlinks[] = array('name' => $strloginto, 'link' => null, 'type' => 'misc');
         $navigation = build_navigation($navlinks);
         print_header($strloginto, $course->fullname, $navigation);
         print_course($course, "80%");
         if ($course->password) {
             // Presenting two options
             print_heading(get_string('costorkey', 'enrol_paypal'), 'center');
         }
         print_simple_box_start("center");
         if ($USER->username == 'guest') {
             // force login only for guest user, not real users with guest role
             if (empty($CFG->loginhttps)) {
                 $wwwroot = $CFG->wwwroot;
             } else {
                 // This actually is not so secure ;-), 'cause we're
                 // in unencrypted connection...
                 $wwwroot = str_replace("http://", "https://", $CFG->wwwroot);
             }
             echo '<div align="center"><p>' . get_string('paymentrequired') . '</p>';
             echo '<p><b>' . get_string('cost') . ": {$CFG->enrol_currency} {$cost}" . '</b></p>';
             echo '<p><a href="' . $wwwroot . '/login/">' . get_string('loginsite') . '</a></p>';
             echo '</div>';
         } else {
             //Sanitise some fields before building the PayPal form
             $coursefullname = $course->fullname;
             $courseshortname = $course->shortname;
             $userfullname = fullname($USER);
             $userfirstname = $USER->firstname;
             $userlastname = $USER->lastname;
             $useraddress = $USER->address;
             $usercity = $USER->city;
             include $CFG->dirroot . '/enrol/paypal/enrol.html';
         }
         print_simple_box_end();
         if ($course->password) {
             // Second option
             $password = '';
             include $CFG->dirroot . '/enrol/manual/enrol.html';
         }
         print_footer();
     }
 }

function workshop_cron()
{
    // Function to be run periodically according to the moodle cron
    global $CFG, $USER;
    // if there any ungraded assessments run the grading routine
    if ($workshops = get_records("workshop")) {
        foreach ($workshops as $workshop) {
            // automatically grade assessments if workshop has examples and/or peer assessments
            if ($workshop->gradingstrategy and ($workshop->ntassessments or $workshop->nsassessments)) {
                workshop_grade_assessments($workshop);
            }
        }
    }
    $timenow = time();
    // Find all workshop notifications that have yet to be mailed out, and mails them
    $cutofftime = $timenow - $CFG->maxeditingtime;
    // look for new assessments
    if ($assessments = workshop_get_unmailed_assessments($cutofftime)) {
        foreach ($assessments as $assessment) {
            echo "Processing workshop assessment {$assessment->id}\n";
            // only process the entry once
            if (!set_field("workshop_assessments", "mailed", "1", "id", "{$assessment->id}")) {
                echo "Could not update the mailed field for id {$assessment->id}\n";
            }
            if (!($submission = get_record("workshop_submissions", "id", "{$assessment->submissionid}"))) {
                echo "Could not find submission {$assessment->submissionid}\n";
                continue;
            }
            if (!($workshop = get_record("workshop", "id", $submission->workshopid))) {
                echo "Could not find workshop id {$submission->workshopid}\n";
                continue;
            }
            if (!($course = get_record("course", "id", $workshop->course))) {
                error("Could not find course id {$workshop->course}");
                continue;
            }
            if (!($cm = get_coursemodule_from_instance("workshop", $workshop->id, $course->id))) {
                error("Course Module ID was incorrect");
                continue;
            }
            if (!($submissionowner = get_record("user", "id", "{$submission->userid}"))) {
                echo "Could not find user {$submission->userid}\n";
                continue;
            }
            if (!($assessmentowner = get_record("user", "id", "{$assessment->userid}"))) {
                echo "Could not find user {$assessment->userid}\n";
                continue;
            }
            if (!workshop_is_student($workshop, $submissionowner->id) and !workshop_is_teacher($workshop, $submissionowner->id)) {
                continue;
                // Not an active participant
            }
            if (!workshop_is_student($workshop, $assessmentowner->id) and !workshop_is_teacher($workshop, $assessmentowner->id)) {
                continue;
                // Not an active participant
            }
            // don't sent self assessment
            if ($submissionowner->id == $assessmentowner->id) {
                continue;
            }
            $strworkshops = get_string("modulenameplural", "workshop");
            $strworkshop = get_string("modulename", "workshop");
            // it's an assessment, tell the submission owner
            $USER->lang = $submissionowner->lang;
            $sendto = $submissionowner;
            // "Your assignment \"$submission->title\" has been assessed by"
            if (workshop_is_student($workshop, $assessmentowner->id)) {
                $msg = get_string("mail1", "workshop", $submission->title) . " a {$course->student}.\n";
            } else {
                $msg = get_string("mail1", "workshop", $submission->title) . " " . fullname($assessmentowner) . "\n";
            }
            // "The comments and grade can be seen in the workshop assignment '$workshop->name'
            // I have taken the following line out because the info is repeated below.
            // $msg .= get_string("mail2", "workshop", $workshop->name)."\n\n";
            $postsubject = "{$course->shortname}: {$strworkshops}: " . format_string($workshop->name, true);
            $posttext = "{$course->shortname} -> {$strworkshops} -> " . format_string($workshop->name, true) . "\n";
            $posttext .= "---------------------------------------------------------------------\n";
            $posttext .= $msg;
            // "The comments and grade can be seen in ..."
            $posttext .= get_string("mail2", "workshop", format_string($workshop->name, true) . ",   {$CFG->wwwroot}/mod/workshop/view.php?id={$cm->id}") . "\n";
            $posttext .= "---------------------------------------------------------------------\n";
            if ($sendto->mailformat == 1) {
                // HTML
                $posthtml = "<p><font face=\"sans-serif\">" . "<a href=\"{$CFG->wwwroot}/course/view.php?id={$course->id}\">{$course->shortname}</a> ->" . "<a href=\"{$CFG->wwwroot}/mod/workshop/index.php?id={$course->id}\">{$strworkshops}</a> ->" . "<a href=\"{$CFG->wwwroot}/mod/workshop/view.php?id={$cm->id}\">" . format_string($workshop->name, true) . "</a></font></p>";
                $posthtml .= "<hr><font face=\"sans-serif\">";
                $posthtml .= "<p>{$msg}</p>";
                $posthtml .= "<p>" . get_string("mail2", "workshop", " <a href=\"{$CFG->wwwroot}/mod/workshop/view.php?id={$cm->id}\">" . format_string($workshop->name, true) . "</a>") . "</p></font><hr>";
            } else {
                $posthtml = "";
            }
            if (!($teacher = get_teacher($course->id))) {
                echo "Error: can not find teacher for course {$course->id}!\n";
            }
            if (!email_to_user($sendto, $teacher, $postsubject, $posttext, $posthtml)) {
                echo "Error: workshop cron: Could not send out mail for id {$submission->id} to\n                    user {$sendto->id} ({$sendto->email})\n";
            }
        }
    }
    // look for new assessments of resubmissions
    if ($assessments = workshop_get_unmailed_resubmissions($cutofftime)) {
//.........这里部分代码省略.........

function email_welcome_message_to_user($course, $user = NULL)
{
    global $CFG, $USER;
    if (isset($CFG->sendcoursewelcomemessage) and !$CFG->sendcoursewelcomemessage) {
        return;
    }
    if (empty($user)) {
        if (!isloggedin()) {
            return false;
        }
        $user = $USER;
    }
    if (!empty($course->welcomemessage)) {
        $message = $course->welcomemessage;
    } else {
        $a = new Object();
        $a->coursename = $course->fullname;
        $a->profileurl = "{$CFG->wwwroot}/user/view.php?id={$user->id}&course={$course->id}";
        $message = get_string("welcometocoursetext", "", $a);
    }
    /// If you don't want a welcome message sent, then make the message string blank.
    if (!empty($message)) {
        $subject = get_string('welcometocourse', '', format_string($course->fullname));
        if (!($teacher = get_teacher($course->id))) {
            $teacher = get_admin();
        }
        email_to_user($user, $teacher, $subject, $message);
    }
}

 }
 if ($data->payment_gross < $cost) {
     $cost = format_float($cost, 2);
     email_paypal_error_to_admin("Amount paid is not enough ({$data->payment_gross} < {$cost}))", $data);
     die;
 }
 // ALL CLEAR !
 if (!insert_record("enrol_paypal", addslashes_object($data))) {
     // Insert a transaction record
     email_paypal_error_to_admin("Error while trying to insert valid transaction", $data);
 }
 if (!enrol_into_course($course, $user, 'paypal')) {
     email_paypal_error_to_admin("Error while trying to enrol " . fullname($user) . " in '{$course->fullname}'", $data);
     die;
 } else {
     $teacher = get_teacher($course->id);
     if (!empty($CFG->enrol_mailstudents)) {
         $a->coursename = $course->fullname;
         $a->profileurl = "{$CFG->wwwroot}/user/view.php?id={$user->id}";
         email_to_user($user, $teacher, get_string("enrolmentnew", '', $course->shortname), get_string('welcometocoursetext', '', $a));
     }
     if (!empty($CFG->enrol_mailteachers)) {
         $a->course = $course->fullname;
         $a->user = fullname($user);
         email_to_user($teacher, $user, get_string("enrolmentnew", '', $course->shortname), get_string('enrolmentnewuser', '', $a));
     }
     if (!empty($CFG->enrol_mailadmins)) {
         $a->course = $course->fullname;
         $a->user = fullname($user);
         $admins = get_admins();
         foreach ($admins as $admin) {

function email_welcome_message_to_user($course, $user = NULL)
{
    global $CFG, $USER;
    if (empty($user)) {
        if (!isloggedin()) {
            return false;
        }
        $user = $USER;
    }
    if (!empty($course->welcomemessage)) {
        $subject = get_string('welcometocourse', '', format_string($course->fullname));
        $a->coursename = $course->fullname;
        $a->profileurl = "{$CFG->wwwroot}/user/view.php?id={$USER->id}&course={$course->id}";
        //$message = get_string("welcometocoursetext", "", $a);
        $message = $course->welcomemessage;
        if (!($teacher = get_teacher($course->id))) {
            $teacher = get_admin();
        }
        email_to_user($user, $teacher, $subject, $message);
    }
}

 /**
 * This function is run by admin/cron.php every time
 *
 * The cron function can perform regular checks for the current
 * enrollment plugin.  For example it can check a foreign database,
 * all look for a file to pull data in from
 *
 */
 function cron()
 {
     global $CFG;
     // Notify users about enrolments that are going to expire soon!
     if (empty($CFG->lastexpirynotify)) {
         $CFG->lastexpirynotify = 0;
     }
     if ($CFG->lastexpirynotify < date('Ymd') && ($courses = get_records_select('course', 'enrolperiod > 0 AND expirynotify > 0 AND expirythreshold > 0'))) {
         $admin = get_admin();
         $strexpirynotify = get_string('expirynotify');
         foreach ($courses as $course) {
             $a = new object();
             $a->coursename = $course->shortname . '/' . $course->fullname;
             $a->threshold = $course->expirythreshold / 86400;
             $a->extendurl = $CFG->wwwroot . '/user/index.php?id=' . $course->id;
             $a->current = array();
             $a->past = array();
             $a->current = $a->past = array();
             $expiry = time() + $course->expirythreshold;
             /// Get all the role assignments for this course that have expired.
             if (!($context = get_context_instance(CONTEXT_COURSE, $course->id))) {
                 continue;
             }
             if ($oldenrolments = get_records_sql('
                   SELECT u.*
                     FROM ' . $CFG->prefix . 'role_assignments ra,
                          ' . $CFG->prefix . 'user u
                     WHERE ra.contextid = ' . $context->id . '
                       AND ra.timeend > 0 AND ra.timeend <= ' . $expiry . '
                       AND ra.userid = u.id ')) {
                 if (!($teacher = get_teacher($course->id))) {
                     $teacher = get_admin();
                 }
                 $a->teacherstr = fullname($teacher, true);
                 $strexpirynotifystudentsemail = get_string('expirynotifystudentsemail', '', $a);
                 foreach ($oldenrolments as $user) {
                     /// Email all users about to expire
                     $a->studentstr = fullname($user, true);
                     if ($user->timeend < $expiry - 86400) {
                         $a->past[] = fullname($user) . " <{$user->email}>";
                     } else {
                         $a->current[] = fullname($user) . " <{$user->email}>";
                         if ($course->notifystudents) {
                             // Send this guy notice
                             email_to_user($user, $teacher, $SITE->fullname . ' ' . $strexpirynotify, $strexpirynotifystudentsemail);
                         }
                     }
                 }
                 $a->current = implode("\n", $a->current);
                 $a->past = implode("\n", $a->past);
                 $strexpirynotifyemail = get_string('expirynotifyemail', '', $a);
                 if ($a->current || $a->past) {
                     if ($teachers = get_users_by_capability($context, 'moodle/course:update', 'u.*,ra.hidden', 'r.sortorder ASC', '', '', '', '', false)) {
                         foreach ($teachers as $teacher) {
                             email_to_user($teacher, $admin, $a->coursename . ' ' . $strexpirynotify, $strexpirynotifyemail);
                         }
                     }
                 }
             }
             set_config('lastexpirynotify', date('Ymd'));
         }
     }
 }

function certificate_email_students($USER)
{
    global $course, $certificate, $CFG;
    $certrecord = certificate_get_issue($course, $USER);
    if ($certrecord->sent > 0) {
        return;
    }
    $teacher = get_teacher($course->id);
    $strawarded = get_string('awarded', 'certificate');
    $stremailstudenttext = get_string('emailstudenttext', 'certificate');
    $info->username = fullname($user);
    $info->certificate = format_string($certificate->name, true);
    $info->course = format_string($course->fullname, true);
    $from = fullname($teacher);
    $subject = $info->course . ': ' . $info->certificate;
    $message = get_string('emailstudenttext', 'certificate', $info) . "\n";
    // Make the HTML version more XHTML happy  (&)
    $messagehtml = text_to_html(get_string('emailstudenttext', 'certificate', $info));
    $user->mailformat = 0;
    // Always send HTML version as well
    $attachment = $course->id . '/moddata/certificate/' . $certificate->id . '/' . $USER->id . '/certificate.pdf';
    $attachname = "certificate.pdf";
    set_field("certificate_issues", "sent", "1", "certificateid", $certificate->id, "userid", $USER->id);
    return email_to_user($USER, $from, $subject, $message, $messagehtml, $attachment, $attachname);
}

function exercise_cron()
{
    // Function to be run periodically according to the moodle cron
    // Finds all exercise notifications that have yet to be mailed out, and mails them
    global $CFG, $USER;
    $cutofftime = time() - $CFG->maxeditingtime;
    // look for new assessments
    if ($assessments = exercise_get_unmailed_assessments($cutofftime)) {
        $timenow = time();
        foreach ($assessments as $assessment) {
            echo "Processing exercise assessment {$assessment->id}\n";
            // switch on mailed
            if (!set_field("exercise_assessments", "mailed", "1", "id", "{$assessment->id}")) {
                echo "Could not update the mailed field for id {$assessment->id}\n";
            }
            if (!($submission = get_record("exercise_submissions", "id", "{$assessment->submissionid}"))) {
                echo "Could not find submission {$assessment->submissionid}\n";
                continue;
            }
            if (!($exercise = get_record("exercise", "id", $submission->exerciseid))) {
                echo "Could not find exercise record for id {$submission->exerciseid}\n";
                continue;
            }
            if (!($course = get_record("course", "id", "{$exercise->course}"))) {
                echo "Could not find course {$exercise->course}\n";
                continue;
            }
            if (!($cm = get_coursemodule_from_instance("exercise", $exercise->id, $course->id))) {
                error("Course Module ID was incorrect");
                continue;
            }
            if (!($submissionowner = get_record("user", "id", "{$submission->userid}"))) {
                echo "Could not find user {$submission->userid}\n";
                continue;
            }
            if (!($assessmentowner = get_record("user", "id", "{$assessment->userid}"))) {
                echo "Could not find user {$assessment->userid}\n";
                continue;
            }
            if (!isstudent($course->id, $submissionowner->id) and !isteacher($course->id, $submissionowner->id)) {
                continue;
                // Not an active participant
            }
            if (!isstudent($course->id, $assessmentowner->id) and !isteacher($course->id, $assessmentowner->id)) {
                continue;
                // Not an active participant
            }
            // if the submission belongs to a teacher it's a student assessment. No need to email anything.
            if (isteacher($course->id, $submissionowner->id)) {
                continue;
            }
            $strexercises = get_string("modulenameplural", "exercise");
            $strexercise = get_string("modulename", "exercise");
            // it's an assessment, tell the submission owner
            $USER->lang = $submissionowner->lang;
            $sendto = $submissionowner;
            // "Your assignment \"$submission->title\" has been assessed by"
            $msg = get_string("mail1", "exercise", $submission->title) . ' ' . fullname($assessmentowner) . ".\n";
            // "The comments and grade can be seen in the exercise assignment '$exercise->name'
            $msg .= get_string("mail2", "exercise", format_string($exercise->name, true)) . "\n\n";
            $postsubject = "{$course->shortname}: {$strexercises}: " . format_string($exercise->name, true);
            $posttext = "{$course->shortname} -> {$strexercises} -> " . format_string($exercise->name, true) . "\n";
            $posttext .= "---------------------------------------------------------------------\n";
            $posttext .= $msg;
            // "You can see it in your exercise assignment"
            $posttext .= get_string("mail3", "exercise") . ":\n";
            $posttext .= "   {$CFG->wwwroot}/mod/exercise/view.php?id={$cm->id}\n";
            $posttext .= "---------------------------------------------------------------------\n";
            if ($sendto->mailformat == 1) {
                // HTML
                $posthtml = "<p><font face=\"sans-serif\">" . "<a href=\"{$CFG->wwwroot}/course/view.php?id={$course->id}\">{$course->shortname}</a> ->" . "<a href=\"{$CFG->wwwroot}/mod/exercise/index.php?id={$course->id}\">{$strexercises}</a> ->" . "<a href=\"{$CFG->wwwroot}/mod/exercise/view.php?id={$cm->id}\">" . format_string($exercise->name, true) . "</a></font></p>";
                $posthtml .= "<hr /><font face=\"sans-serif\">";
                $posthtml .= "<p>{$msg}</p>";
                $posthtml .= "<p>" . get_string("mail3", "exercise") . " <a href=\"{$CFG->wwwroot}/mod/exercise/view.php?id={$cm->id}\">" . format_string($exercise->name, true) . "</a>.</p></font><hr />";
            } else {
                $posthtml = "";
            }
            if (!($teacher = get_teacher($course->id))) {
                echo "Error: can not find teacher for course {$course->id}!\n";
            }
            if (!email_to_user($sendto, $teacher, $postsubject, $posttext, $posthtml)) {
                echo "Error: exercise cron: Could not send out mail for id {$submission->id} to user {$sendto->id} ({$sendto->email})\n";
            }
        }
    }
    return true;
}

function certificate_email_students($user, $course, $certificate, $certrecord)
{
    if ($certrecord->mailed > 0) {
        return;
    }
    $teacher = get_teacher($course->id);
    $info->username = fullname($user);
    $info->certificate = format_string($certificate->name, true);
    $info->course = format_string($course->fullname, true);
    $from = fullname($teacher);
    $subject = $info->course . ': ' . $info->certificate;
    $message = get_string('emailstudenttext', 'certificate', $info) . "\n";
    // Make the HTML version more XHTML happy  (&)
    $messagehtml = text_to_html(get_string('emailstudenttext', 'certificate', $info));
    $user->mailformat = 0;
    // Always send HTML version as well
    $filesafe = clean_filename($certificate->name . '.pdf');
    $attachment = $course->id . '/moddata/certificate/' . $certificate->id . '/' . $user->id . '/' . $filesafe;
    $attachname = $filesafe;
    set_field('certificate_issues', 'mailed', '1', 'certificateid', $certificate->id, 'userid', $user->id);
    return email_to_user($user, $from, $subject, $message, $messagehtml, $attachment, $attachname);
}

            $wheresql = empty($wheresql) ? " WHERE addtime> " . $settr : $wheresql . " AND addtime> " . $settr;
            $oederbysql = " order BY addtime DESC ";
        }
        if (!empty($_GET['refre'])) {
            $settr = strtotime("-" . intval($_GET['refre']) . " day");
            $wheresql = empty($wheresql) ? " WHERE refreshtime> " . $settr : $wheresql . " AND refreshtime> " . $settr;
            $oederbysql = " order BY refreshtime DESC ";
        }
    }
    $total_sql = "SELECT COUNT(*) AS num FROM " . table('train_teachers') . $wheresql;
    $total_val = $db->get_total($total_sql);
    $page = new page(array('total' => $total_val, 'perpage' => $perpage, 'getarray' => $_GET));
    $currenpage = $page->nowindex;
    $offset = ($currenpage - 1) * $perpage;
    $getsql = "SELECT * FROM " . table('train_teachers') . $wheresql . $oederbysql;
    $teacher = get_teacher($offset, $perpage, $getsql);
    $smarty->assign('pageheader', "讲师管理");
    $smarty->assign('teacher', $teacher);
    $smarty->assign('total', $total);
    $smarty->assign('page', $page->show(3));
    $smarty->assign('total_val', $total_val);
    get_token();
    $smarty->display('train/admin_train_teacher.htm');
} elseif ($act == 'teacher_perform') {
    check_token();
    $yid = !empty($_REQUEST['y_id']) ? $_REQUEST['y_id'] : adminmsg("你没有选择讲师！", 1);
    if (!empty($_POST['delete'])) {
        check_permissions($_SESSION['admin_purview'], "tea_del");
        if ($_POST['delete_teacher'] == 'yes') {
            !del_train_idteacher($yid) ? adminmsg("删除讲师失败！", 0) : "";
        }

             exit;
         } else {
             add_teacher($last_name, $first_name, $display_name);
         }
     }
     $teacherList = get_teacher_list();
     include 'teacher_list.php';
     break;
 case 'show_modify_teacher':
     $teacher_id = filter_input(INPUT_GET, 'teacher_id');
     $teacher = get_teacher($teacher_id);
     $error_msg = '';
     $first_name = $teacher['first_name'];
     $last_name = $teacher['last_name'];
     $display_name = $teacher['display_name'];
     $teachers = get_teacher($teacher_id);
     include 'teacher_modify.php';
     exit;
     break;
 case 'modify_teacher':
     $error_msg = '';
     $choice = filter_input(INPUT_POST, 'choice');
     $first_name = filter_input(INPUT_POST, 'first_name');
     $last_name = filter_input(INPUT_POST, 'last_name');
     $display_name = filter_input(INPUT_POST, 'display_name');
     $teacher_id = filter_input(INPUT_POST, 'teacher_id');
     if ($choice == 'Modify') {
         if (empty($first_name)) {
             $error_msg .= "First Number is required.<BR>";
         }
         if (empty($last_name)) {

            ?>
          <tr>
            <td>

            <a href="javascript:jump('../course.php?courseid=<?php 
            $course_id = $row[0];
            echo $course_id;
            ?>
')"><?php 
            $course_id = $row[0];
            echo get_coursename($course_id);
            ?>
</a> 
            
            </td>
            <td>
            <?php 
            echo get_teacher($row[0]);
            ?>
            </td>
          </tr>
          <?php 
        }
        ?>
      </table>
      <?php 
    }
}
?>