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<?php // $Id$
// Provide interface for topics AJAX course formats
require_once('../config.php');
require_once($CFG->dirroot.'/course/lib.php');
require_once($CFG->libdir .'/pagelib.php');
require_once($CFG->libdir .'/blocklib.php');
// Initialise ALL the incoming parameters here, up front.
$courseid = required_param('courseId', PARAM_INT);
$class = required_param('class', PARAM_ALPHA);
$field = optional_param('field', '', PARAM_ALPHA);
$instanceid = optional_param('instanceId', 0, PARAM_INT);
$sectionid = optional_param('sectionId', 0, PARAM_INT);
$beforeid = optional_param('beforeId', 0, PARAM_INT);
$value = optional_param('value', 0, PARAM_INT);
$column = optional_param('column', 0, PARAM_ALPHA);
$id = optional_param('id', 0, PARAM_INT);
$summary = optional_param('summary', '', PARAM_RAW);
$sequence = optional_param('sequence', '', PARAM_SEQUENCE);
$visible = optional_param('visible', 0, PARAM_INT);
$pageaction = optional_param('action', '', PARAM_ALPHA); // Used to simulate a DELETE command
// Authorise the user and verify some incoming data
if (!$course = get_record('course', 'id', $courseid)) {
error_log('AJAX commands.php: Course does not exist');
die;
}
$PAGE = page_create_object(PAGE_COURSE_VIEW, $course->id);
$pageblocks = blocks_setup($PAGE, BLOCKS_PINNED_BOTH);
if (!empty($instanceid)) {
$blockinstance = blocks_find_instance($instanceid, $pageblocks);
if (!$blockinstance || $blockinstance->pageid != $course->id
|| $blockinstance->pagetype != 'course-view') {
error_log('AJAX commands.php: Bad block ID '.$instanceid);
die;
}
}
$context = get_context_instance(CONTEXT_COURSE, $course->id);
require_login($course->id);
require_capability('moodle/course:update', $context);
if (!empty($CFG->disablecourseajax)) {
error_log('Course AJAX not allowed');
die;
}
require_sesskey();
// OK, now let's process the parameters and do stuff
$req_method = ($pageaction == 'DELETE') ? 'DELETE' : $_SERVER['REQUEST_METHOD'];
switch($req_method) {
case 'POST':
switch ($class) {
case 'block':
switch ($field) {
case 'visible':
blocks_execute_action($PAGE, $pageblocks, 'toggle', $blockinstance);
break;
case 'position': // Misleading case. Should probably call it 'move'.
// We want to move the block around. This means changing
// the column (position field) and/or block sort order
// (weight field).
$undifinedinsertedid = FALSE;
$isaddednewblock = FALSE;
if (!empty($positiontoinsertid) && $positiontoinsertid != 'undefined' && strpos($positiontoinsertid, 'column') === FALSE ) {
$isaddednewblock = (substr($positiontoinsertid,0,1) != 'i') ? TRUE : FALSE;
if ($positiontoinsertid == 'linst0' || $positiontoinsertid == 'rinst0') {
$isaddednewblock = FALSE;
}
$positiontoinsertid = clean_param($positiontoinsertid, PARAM_SEQUENCE);
} else if($positiontoinsertid == 'undefined') {
$undifinedinsertedid = TRUE;
$positiontoinsertid = 0;
} else {
$positiontoinsertid = 0;
}
if ($positiontoinsertid > 0) {
$instsql = 'SELECT * FROM '. $CFG->prefix .'block_instance WHERE '
.' id = \''. $instanceid .'\' AND position = \''. $column .'\' AND pageId = \''. $courseid .'\'';
$instweight = get_record_sql($instsql);
$sql = 'SELECT * FROM '. $CFG->prefix .'block_instance WHERE '
.' id = \''. $positiontoinsertid .'\' AND position = \''. $column .'\' AND pageId = \''. $courseid .'\'';
$targetweight = get_record_sql($sql);
//$instweight = get_record("block_instance", 'id', $positiontoinsertid, "position",$column, 'pageId', $courseid);
if (!empty($targetweight->weight) && !empty($instweight->weight)) {
if ($positiontoinsert == "before") {
if ($targetweight->weight < $instweight->weight || ($instanceid == $positiontoinsertid)) {
$destweight = ($targetweight->weight == 0 || empty($targetweight->weight)) ? 0 : $targetweight->weight ;
} else {
$destweight = ($targetweight->weight == 0 || empty($targetweight->weight)) ? 0 : $targetweight->weight -1 ;
}
} else if ($positiontoinsert == "after") {
$destweight = $targetweight->weight + 1;
}
} else {
$destweight = ($targetweight->weight == 0 || empty($targetweight->weight)) ? 0 : $targetweight->weight - 1 ;
}
} else {
$sql = 'SELECT max(weight) as weight FROM '. $CFG->prefix .'block_instance WHERE '
.'position = \''. $column .'\' AND pageId = \''. $courseid .'\'';
$instweight = get_record_sql($sql);
$countrecords = count_records('block_instance', 'position', $column, 'pageId', $courseid);
$recordexists = record_exists('block_instance', 'position', $column, 'pageId', $courseid, 'id', $instanceid);
if ($isaddednewblock || $undifinedinsertedid) {
if (!empty($countrecords)) {
$destweight = ($recordexists) ? $instweight->weight : $instweight->weight + 1 ;
} else {
$destweight = 0;
}
} else {
if (!empty($countrecords)) {
$destweight = ($recordexists) ? $instweight->weight : $instweight->weight + 1 ;
} else {
$destweight = 0;
}
}
}
blocks_move_block($PAGE, $blockinstance, $column, $destweight);
$current_blocks = blocks_get_by_page_pinned($PAGE);
global $COURSE;
foreach ($current_blocks as $pos =>$blocks) {
if (count($current_blocks[$pos]) == 0) {
print_side_block('', '', NULL, NULL, '', array('id'=> $pos.'inst0', 'class'=>'tempblockhandle'), '');
}
}
break;
}
break;
case 'section':
if (!record_exists('course_sections','course',$course->id,'section',$id)) {
error_log('AJAX commands.php: Bad Section ID '.$id);
die;
}
switch ($field) {
case 'visible':
set_section_visible($course->id, $id, $value);
break;
case 'move':
move_section_to($course, $id, $value);
break;
}
rebuild_course_cache($course->id);
break;
case 'resource':
if (!$mod = get_record('course_modules', 'id', $id, 'course', $course->id)) {
error_log('AJAX commands.php: Bad course module ID '.$id);
die;
}
switch ($field) {
case 'visible':
set_coursemodule_visible($mod->id, $value);
break;
case 'groupmode':
set_coursemodule_groupmode($mod->id, $value);
break;
case 'indentleft':
if ($mod->indent > 0) {
$mod->indent--;
update_record('course_modules', $mod);
}
break;
case 'indentright':
$mod->indent++;
update_record('course_modules', $mod);
break;
case 'move':
if (!$section = get_record('course_sections','course',$course->id,'section',$sectionid)) {
error_log('AJAX commands.php: Bad section ID '.$sectionid);
die;
}
if ($beforeid > 0){
$beforemod = get_record('course_modules', 'id', $beforeid);
} else {
$beforemod = NULL;
}
if (debugging('',DEBUG_DEVELOPER)) {
error_log(serialize($beforemod));
}
moveto_module($mod, $section, $beforemod);
break;
}
rebuild_course_cache($course->id);
break;
case 'course':
switch($field) {
case 'marker':
$newcourse = new object;
$newcourse->id = $course->id;
$newcourse->marker = $value;
if (!update_record('course',$newcourse)) {
error_log('AJAX commands.php: Failed to update course marker for course '.$newcourse->id);
die;
}
break;
}
break;
}
break;
case 'DELETE':
switch ($class) {
case 'block':
blocks_execute_action($PAGE, $pageblocks, 'delete', $blockinstance);
break;
case 'resource':
if (!$cm = get_record('course_modules', 'id', $id, 'course', $course->id)) {
error_log('AJAX rest.php: Bad course module ID '.$id);
die;
}
if (!$mod = get_record('modules', 'id', $cm->module)) {
error_log('AJAX rest.php: Bad module ID '.$cm->module);
die;
}
$mod->name = clean_param($mod->name, PARAM_SAFEDIR); // For safety
$modlib = "$CFG->dirroot/mod/$mod->name/lib.php";
if (file_exists($modlib)) {
include_once($modlib);
} else {
error_log("Ajax rest.php: This module is missing important code ($modlib)");
die;
}
$deleteinstancefunction = $mod->name."_delete_instance";
// Run the module's cleanup funtion.
if (!$deleteinstancefunction($cm->instance)) {
error_log("Ajax rest.php: Could not delete the $mod->name (instance)");
die;
}
// Remove the course_modules entry.
if (!delete_course_module($cm->id)) {
error_log("Ajax rest.php: Could not delete the $mod->modulename (coursemodule)");
die;
}
rebuild_course_cache($course->id);
add_to_log($courseid, "course", "delete mod",
"view.php?id=$courseid",
"$mod->name $cm->instance", $cm->id);
break;
}
break;
}
?>
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