<?php  // $Id$

    require_once('../../config.php');
    require_once('lib.php');

    $id = optional_param('id', 0, PARAM_INT);  // Course module ID
    $a  = optional_param('a', 0, PARAM_INT);   // Assignment ID

    if ($id) {
        if (! $cm = get_coursemodule_from_id('assignment', $id)) {
            print_error('invalidcoursemodule');
        }

        if (! $assignment = get_record('assignment', 'id', $cm->instance)) {
            print_error('invalidid', 'assignment');
        }

        if (! $course = get_record('course', 'id', $assignment->course)) {
            print_error('coursemisconf', 'assignment');
        }
    } else {
        if (!$assignment = get_record('assignment', 'id', $a)) {
            print_error('invalidcoursemodule');
        }
        if (! $course = get_record('course', 'id', $assignment->course)) {
            print_error('coursemisconf', 'assignement');
        }
        if (! $cm = get_coursemodule_from_instance('assignment', $assignment->id, $course->id)) {
            print_error('invalidcoursemodule');
        }
    }

    require_login($course->id, false, $cm);

/// Load up the required assignment code
    require($CFG->dirroot.'/mod/assignment/type/'.$assignment->assignmenttype.'/assignment.class.php');
    $assignmentclass = 'assignment_'.$assignment->assignmenttype;
    $assignmentinstance = new $assignmentclass($cm->id, $assignment, $cm, $course);

    $assignmentinstance->delete();   // delete something

?>