mod_form.php

<?php
require_once('moodleform_mod.php');
require_once('locallib.php');

class mod_wwassignment_mod_form extends moodleform_mod
{

    function definition()
    {
        global $COURSE, $USER;
        $mform = $this->_form;

        $config = get_config('wwassignment');
        $this->_features->showdescription = true;

        //Is this particular course mapped to a course in WeBWorK   
        $wwclient = new wwassignment_client();
        $wwcoursename = _wwassignment_mapped_course($COURSE->id, false);
        $wwsetname = _wwassignment_mapped_set($this->_instance);
        $wwusername = $USER->username;

        //create the instructor if necessary
        $wwusername = _wwassignment_mapcreate_user($wwcoursename, $wwusername, '10');

        //login the instructor
        $wwkey = _wwassignment_login_user($wwcoursename, $wwusername);

        $wwinstructorlink = _wwassignment_link_to_instructor_auto_login($wwcoursename, $wwusername, $wwkey);


        $mform->addElement('link', 'instructor_page_link',
            get_string('instructor_page_link_desc', 'wwassignment'),
            $wwinstructorlink, get_string('instructor_page_link_name', 'wwassignment'));


        if ($wwsetname != -1) {
            //we are doing an update, since an id exists in moodle db
            $wwsetlink = _wwassignment_link_to_edit_set_auto_login($wwcoursename, $wwsetname, $wwusername, $wwkey);
            $mform->addElement('link', 'edit_set', get_string('edit_set_link_desc', 'wwassignment'),
                $wwsetlink, get_string('edit_set_link_name', 'wwassignment'));
            $wwsetdata = $wwclient->get_assignment_data($wwcoursename, $wwsetname, false);

            $opendate = strftime("%c", $wwsetdata['open_date']);
            $duedate = strftime("%c", $wwsetdata['due_date']);
            $mform->addElement('static', 'opendate', 'WeBWorK Set Open Date', $opendate);
            $mform->addElement('static', 'duedate', 'WeBWorK Set Due Date', $duedate);
        }

        //define the mapping
        $mform->addElement('header', 'set_initialization', get_string('set_initialization', 'wwassignment'));


        //name
        $mform->addElement('text', 'name', get_string('wwassignmentname', 'wwassignment'), array('size' => '64'));
        $mform->setType('name', PARAM_TEXT);
        $mform->addRule('name', null, 'required', null, 'client');

        //set select
        $options = $wwclient->options_set($wwcoursename, false);
        $mform->addElement('select', 'webwork_set', get_string('webwork_set', 'wwassignment'), $options);
        // $OUTPUT->help_icon('enablenotification','assignment');
        $mform->addHelpButton('webwork_set', 'webwork_set', 'wwassignment');

        // Instead of the wwassign description, we should use the normal intro...
        $this->add_intro_editor($config->requiremodintro);

        $features = new stdClass;
        $features->gradecat = true;
        $features->groups = false;
        $this->standard_coursemodule_elements($features);

        $this->add_action_buttons();

        return;
    }

    function validation($data, $files)
    {
        $errors = parent::validation($data, $files);
        return $errors;

    }

}