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enrol/database - now with added sync and course autocreation

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Added an external script to invoke automatic enrol-unenrol. It also
will autocreate courses based on a template.
This commit is contained in:
martinlanghoff 2006-01-16 03:08:50 +00:00
parent 061fb2e7c3
commit 491651f448
2 changed files with 318 additions and 0 deletions
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290
enrol/database/enrol.php
View File

@ -1,6 +1,9 @@
<?php // $Id$
require_once("$CFG->dirroot/enrol/enrol.class.php");
require_once("$CFG->dirroot/course/lib.php");
require_once("$CFG->dirroot/lib/blocklib.php");
require_once("$CFG->dirroot/lib/pagelib.php");
class enrolment_plugin extends enrolment_base {
@ -73,6 +76,208 @@ function get_student_courses(&$user) {
} // end if (enroldb=connect)
}
///
/// sync enrolments with database, create courses if required.
///
/// NOTE: we are currently ignoring $type, as enrol/database only deasl with student enrolment
function sync_enrolments($type='student') {
global $CFG;
global $db;
error_reporting(E_ALL);
// force type to student - remove when adding teacher support
$type = 'student';
if(!isset($type) || !($type =='student' || $type =='teacher' )){
error("Bad call to get_all_courses()!");
}
// Connect to the external database
$enroldb = $this->enrol_connect();
if (!$enroldb) {
notify("enrol/database cannot connect to server");
return false;
}
// first, pack the sortorder...
fix_course_sortorder();
// get enrolments per-course
$sql = "SELECT DISTINCT {$CFG->enrol_remotecoursefield} " .
" FROM {$CFG->enrol_dbtable} " .
" WHERE {$CFG->enrol_remoteuserfield} IS NOT NULL";
$rs = $enroldb->Execute($sql);
if (!$rs) {
trigger_error($enroldb->ErrorMsg() .' STATEMENT: '. $sql);
return false;
}
if ( $rs->RecordCount() == 0 ) { // no courses! outta here...
return true;
}
$extcourses = array();
while (!$rs->EOF) { // there are more course records
$extcourse = $rs->fields[0];
array_push($extcourses, $extcourse);
$rs->MoveNext(); // prep the next record
print "course $extcourse\n";
// does the course exist in moodle already?
$course = false;
$course = get_record( 'course',
$CFG->enrol_localcoursefield,
$extcourse );
if (!is_object($course)) {
// ok, now then let's create it!
print "Creating Course $extcourse...";
// prepare any course properties we actually have
$course = new StdClass;
$course->{$CFG->enrol_localcoursefield} = $extcourse;
$course->fullname = $extcourse;
$course->shortname = $extcourse;
if ($newcourseid = $this->create_course($course, true)) { // we are skipping fix_course_sortorder()
$course = get_record( 'course', 'id', $newcourseid);
}
if ($course) {
print "OK!\n";
} else {
print "failed\n";
continue; // nothing left to do...
}
}
// get a list of the student ids the are enrolled
// in the external db -- hopefully it'll fit in memory...
$extenrolments = array();
$sql = "SELECT {$CFG->enrol_remoteuserfield} " .
" FROM {$CFG->enrol_dbtable} " .
" WHERE {$CFG->enrol_remotecoursefield} = '$extcourse'";
$crs = $enroldb->Execute($sql);
if (!$crs) {
trigger_error($enroldb->ErrorMsg() .' STATEMENT: '. $sql);
return false;
}
if ( $crs->RecordCount() == 0 ) { // shouldn't happen, but cover all bases
continue;
}
// slurp results into an array
while (!$crs->EOF) {
array_push($extenrolments,$crs->fields[0]);
$crs->MoveNext();
}
unset($crs); // release the handle
//
// prune enrolments
// hopefully they'll fit in the max buffer size for the RDBMS
//
$sql = " SELECT enr.userid AS userid " .
" FROM {$CFG->prefix}user_students enr " .
" JOIN {$CFG->prefix}user usr ON usr.id=enr.userid " .
" WHERE course={$course->id} AND enrol='database' " .
" AND {$CFG->enrol_localuserfield} NOT IN (" . join(',', $extenrolments) .")";
$ers = $db->Execute($sql);
if (!$ers) {
trigger_error($db->ErrorMsg() .' STATEMENT: '. $sql);
return false;
}
if ( $ers->RecordCount() > 0 ) {
while (!$ers->EOF) {
$member = $ers->fields[0];
$ers->MoveNext();
if (unenrol_student($member, $course->id)){
print "Unenrolled $type $member into course $course->id ($course->shortname)\n";
} else {
print "Failed to unenrol $type $member into course $course->id ($course->shortname)\n";
}
}
}
unset($ers); // release the handle
//
// insert current enrolments
// bad we can't do INSERT IGNORE with postgres...
//
begin_sql();
foreach ($extenrolments as $member) {
// Get the user id and whether is enrolled in one fell swoop
$sql = "SELECT u.id AS userid, e.id AS enrolmentid" .
" FROM {$CFG->prefix}user u " .
" LEFT OUTER JOIN {$CFG->prefix}user_students e ON (u.id = e.userid AND e.course='{$course->id}')" .
" WHERE u.{$CFG->enrol_localuserfield} = '$member'";
$ers = $db->Execute($sql);
if (!$ers) {
trigger_error($db->ErrorMsg() .' STATEMENT: '. $sql);
return false;
}
if ( $ers->RecordCount() != 1 ) { // should not happen!
trigger_error('weird! no enrolment entry?');
continue;
}
$userid = $ers->fields[0];
$enrolmentid = $ers->fields[1];
unset($ers); // release the handle
if ($enrolmentid) { // already enrolled - skip
continue;
}
if($type === 'student'){
if (enrol_student($userid, $course->id, 0, 0, 'database')){
print "Enrolled $type $member into course $course->id ($course->shortname)\n";
} else {
print "Failed to enrol $type $member into course $course->id ($course->shortname)\n";
}
}
} // end foreach member
commit_sql();
} // end while course records
//
// prune enrolments to courses that are no longer in ext auth
//
$sql = "SELECT e.userid, e.course " .
" FROM {$CFG->prefix}user_students e " .
" JOIN {$CFG->prefix}course c ON e.course = c.id " .
" WHERE e.enrol='database' " ;
if ($extcourses) {
$sql .= " AND c.{$CFG->enrol_localcoursefield} NOT IN ('" . join("','", $extcourses) . "')";
}
$ers = $db->Execute($sql);
if (!$ers) {
trigger_error($db->ErrorMsg() .' STATEMENT: '. $sql);
return false;
}
if ( $ers->RecordCount() > 0 ) {
while (!$ers->EOF) {
$user = $ers->fields[0];
$course = $ers->fields[1];
$ers->MoveNext();
if (unenrol_student($user, $course)){
print "Unenrolled student $user from course $course\n";
} else {
print "Failed to unenrol student $user from course $course\n";
}
}
}
unset($ers); // release the handle
// we are done now, a bit of housekeeping
fix_course_sortorder();
$this->enrol_disconnect($enroldb);
return true;
}
/// Override the base print_entry() function
function print_entry($course) {
global $CFG;
@ -180,6 +385,91 @@ function process_config($config) {
}
// will create the moodle course from the template
// course_ext is an array as obtained from ldap -- flattened somewhat
// NOTE: if you pass true for $skip_fix_course_sortorder
// you will want to call fix_course_sortorder() after your are done
// with course creation
function create_course ($course,$skip_fix_course_sortorder=0){
global $CFG;
// define a template
if(!empty($CFG->enrol_dbtemplate)){
$template = get_record("course", 'shortname', $CFG->enrol_dbtemplate);
$template = (array)$template;
} else {
$site = get_site();
$template = array(
'startdate' => time() + 3600 * 24,
'summary' => get_string("defaultcoursesummary"),
'format' => "weeks",
'password' => "",
'guest' => 0,
'numsections' => 10,
'idnumber' => '',
'cost' => '',
'newsitems' => 5,
'showgrades' => 1,
'groupmode' => 0,
'groupmodeforce' => 0,
'student' => $site->student,
'students' => $site->students,
'teacher' => $site->teacher,
'teachers' => $site->teachers,
);
}
// overlay template
foreach (array_keys($template) AS $key) {
if (empty($course->$key)) {
$course->$key = $template[$key];
}
}
if (empty($course->category)){ //category = 0 or undef will break moodle
$course->category = 1; // the misc 'catch-all' category
}
// define the sortorder
$sort = get_field_sql('SELECT COALESCE(MAX(sortorder)+1, 100) AS max ' .
' FROM ' . $CFG->prefix . 'course ' .
' WHERE category=' . $course->category);
$course->sortorder = $sort;
// override with local data
$course->startdate = time() + 3600 * 24;
$course->timecreated = time();
$course->visible = 1;
// clear out id just in case
unset($course->id);
// truncate a few key fields
$course->idnumber = substr($course->idnumber, 0, 100);
$course->shortname = substr($course->shortname, 0, 15);
// store it and log
if ($newcourseid = insert_record("course", $course)) { // Set up new course
$section = NULL;
$section->course = $newcourseid; // Create a default section.
$section->section = 0;
$section->id = insert_record("course_sections", $section);
$page = page_create_object(PAGE_COURSE_VIEW, $newcourseid);
blocks_repopulate_page($page); // Return value no
if(!$skip_fix_course_sortorder){
fix_course_sortorder();
}
add_to_log($newcourseid, "course", "new", "view.php?id=$newcourseid", "enrol/database auto-creation");
} else {
trigger_error("Could not create new course $extcourse from from database");
notify("Serious Error! Could not create the new course!");
return false;
}
return $newcourseid;
}
/// DB Connect
/// NOTE: You MUST remember to disconnect
/// when you stop using it -- as this call will

28
enrol/database/enrol_database_sync.php Normal file
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@ -0,0 +1,28 @@
<?php
if(!empty($_SERVER['GATEWAY_INTERFACE'])){
error_log("should not be called from apache!");
exit;
}
error_reporting(E_ALL);
require_once(dirname(dirname(dirname(__FILE__))).'/config.php'); // global moodle config file.
require_once($CFG->dirroot . '/course/lib.php');
require_once($CFG->dirroot . '/lib/moodlelib.php');
require_once($CFG->dirroot . '/lib/datalib.php');
require_once($CFG->dirroot . "/enrol/" . $CFG->enrol . "/enrol.php");
// ensure errors are well explained
$CFG->debug=10;
// update enrolments -- these handlers should autocreate courses if required
$enrol = new enrolment_plugin();
$enrol->sync_enrolments('student', true);
//$enrol->sync_enrolments('teacher', true);
// sync metacourses
if (function_exists('sync_metacourses')) {
sync_metacourses();
}
?>