// Define the form

public function definition () {

global $USER, $CFG, $COURSE;

$mform =& $this->_form;

$templateuser = $USER;

$context = $this->_customdata['context'];

$mform->addElement('header', 'settingsheader', get_string('toolsettings', 'local_ltiprovider'));

$tools = array();

$tools[$context->id] = get_string('course');

$modinfo = get_fast_modinfo($this->_customdata['courseid']);

$mods = $modinfo->get_cms();

foreach ($mods as $mod) {

$tools[$mod->context->id] = format_string($mod->name);

}

$mform->addElement('select', 'contextid', get_string('tooltobeprovide', 'local_ltiprovider'), $tools);

$mform->setDefault('contextid', $context->id);

$mform->addElement('checkbox', 'sendgrades', null, get_string('sendgrades', 'local_ltiprovider'));

$mform->setDefault('sendgrades', 1);

$mform->addElement('checkbox', 'forcenavigation', null, get_string('forcenavigation', 'local_ltiprovider'));

$mform->setDefault('forcenavigation', 1);

$mform->addElement('duration', 'enrolperiod', get_string('enrolperiod', 'local_ltiprovider'), array('optional' => true, 'defaultunit' => 86400));

$mform->setDefault('enrolperiod', 0);

$mform->addHelpButton('enrolperiod', 'enrolperiod', 'local_ltiprovider');

$mform->addElement('date_selector', 'enrolstartdate', get_string('enrolstartdate', 'local_ltiprovider'), array('optional' => true));

$mform->setDefault('enrolstartdate', 0);

$mform->addHelpButton('enrolstartdate', 'enrolstartdate', 'local_ltiprovider');

$mform->addElement('date_selector', 'enrolenddate', get_string('enrolenddate', 'local_ltiprovider'), array('optional' => true));

$mform->setDefault('enrolenddate', 0);

$mform->addHelpButton('enrolenddate', 'enrolenddate', 'local_ltiprovider');

$mform->addElement('text', 'maxenrolled', get_string('maxenrolled', 'local_ltiprovider'));

$mform->setDefault('maxenrolled', 0);

$mform->addHelpButton('maxenrolled', 'maxenrolled', 'local_ltiprovider');

$mform->setType('maxenrolled', PARAM_INT);

$assignableroles = get_assignable_roles($context);

$mform->addElement('select', 'croleinst', get_string('courseroleinstructor', 'local_ltiprovider'), $assignableroles);

$mform->setDefault('croleinst', '3');

$mform->setAdvanced('croleinst');

$mform->addElement('select', 'crolelearn', get_string('courserolelearner', 'local_ltiprovider'), $assignableroles);

$mform->setDefault('crolelearn', '5');

$mform->setAdvanced('crolelearn');

$mform->addElement('select', 'aroleinst', get_string('activityroleinstructor', 'local_ltiprovider'), $assignableroles);

$mform->disabledIf('aroleinst', 'contextid', 'eq', $context->id);

$mform->setDefault('aroleinst', '3');

$mform->setAdvanced('aroleinst');

$mform->addElement('select', 'arolelearn', get_string('activityrolelearner', 'local_ltiprovider'), $assignableroles);

$mform->disabledIf('arolelearn', 'contextid', 'eq', $context->id);

$mform->setDefault('arolelearn', '5');

$mform->setAdvanced('arolelearn');

$mform->addElement('header', 'remotesystem', get_string('remotesystem', 'local_ltiprovider'));

$mform->addElement('text', 'secret', get_string('secret', 'local_ltiprovider'), 'maxlength="64" size="25"');

$mform->setType('secret', PARAM_MULTILANG);

$mform->setDefault('secret', md5(uniqid(rand(), 1)));

$mform->addRule('secret', get_string('required'), 'required');

if (class_exists('textlib')) {

$textlib = new textlib();

} else {

try {

// for older moodle instances

$textlib = textlib_get_instance();

} catch (Exception $e) {

// updated to use new core_text lib as required by Moodle 2.9

$textlib = new core_text;

}

}

$choices = $textlib->get_encodings();

$mform->addElement('select', 'encoding', get_string('remoteencoding', 'local_ltiprovider'), $choices);

$mform->setDefault('encoding', 'UTF-8');

$mform->addElement('header', 'defaultheader', get_string('userdefaultvalues', 'local_ltiprovider'));

$choices = array(0 => get_string('never'), 1 => get_string('always'));

$mform->addElement('select', 'userprofileupdate', get_string('userprofileupdate', 'local_ltiprovider'), $choices);

$userprofileupdate = get_config('local_ltiprovider', 'userprofileupdate');

if ($userprofileupdate != -1) {

$mform->setDefault('userprofileupdate', $userprofileupdate);

$mform->freeze('userprofileupdate');

} else {

$mform->setDefault('userprofileupdate', 1);

}

$choices = array(0 => get_string('emaildisplayno'), 1 => get_string('emaildisplayyes'), 2 => get_string('emaildisplaycourse'));

$mform->addElement('select', 'maildisplay', get_string('emaildisplay'), $choices);

$mform->setDefault('maildisplay', 2);

$mform->addElement('text', 'city', get_string('city'), 'maxlength="100" size="25"');

$mform->setType('city', PARAM_MULTILANG);

if (empty($CFG->defaultcity)) {

$mform->setDefault('city', $templateuser->city);

} else {

$mform->setDefault('city', $CFG->defaultcity);

}

$mform->addRule('city', get_string('required'), 'required');

$mform->addElement('select', 'country', get_string('selectacountry'), get_string_manager()->get_list_of_countries());

if (empty($CFG->country)) {

$mform->setDefault('country', $templateuser->country);

} else {

$mform->setDefault('country', $CFG->country);

}

$mform->setAdvanced('country');

$choices = get_list_of_timezones();

$choices['99'] = get_string('serverlocaltime');

$mform->addElement('select', 'timezone', get_string('timezone'), $choices);

$mform->setDefault('timezone', $templateuser->timezone);

$mform->setAdvanced('timezone');

$mform->addElement('select', 'lang', get_string('preferredlanguage'), get_string_manager()->get_list_of_translations());

$mform->setDefault('lang', $templateuser->lang);

$mform->setAdvanced('lang');

$mform->addElement('text', 'institution', get_string('institution'), 'maxlength="40" size="25"');

$mform->setType('institution', PARAM_MULTILANG);

$mform->setDefault('institution', $templateuser->institution);

$mform->setAdvanced('institution');

$mform->addElement('header', 'memberships', get_string('membershipsettings', 'local_ltiprovider'));

$mform->addElement('checkbox', 'syncmembers', null, get_string('enablememberssync', 'local_ltiprovider'));

$mform->disabledIf('syncmembers', 'contextid', 'neq', $context->id);

$options = array();

$options[30*60] = '30 ' . get_string('minutes');

$options[60*60] = '1 ' . get_string('hour');

$options[2*60*60] = '2 ' . get_string('hours');

$options[6*60*60] = '6 ' . get_string('hours');

$options[12*60*60] = '12 ' . get_string('hours');

$options[24*60*60] = '24 ' . get_string('hours');

$mform->addElement('select', 'syncperiod', get_string('syncperiod', 'local_ltiprovider'), $options);

$mform->setDefault('syncperiod', 30*60);

$mform->disabledIf('syncperiod', 'contextid', 'neq', $context->id);

$options = array();

$options[1] = get_string('enrolandunenrol' , 'local_ltiprovider');

$options[2] = get_string('enrolnew' , 'local_ltiprovider');

$options[3] = get_string('unenrolmissing' , 'local_ltiprovider');

$mform->addElement('select', 'syncmode', get_string('syncmode', 'local_ltiprovider'), $options);

$mform->setDefault('syncmode', 1);

$mform->disabledIf('syncmode', 'contextid', 'neq', $context->id);

$mform->addElement('header', 'layoutandcss', get_string('layoutandcss', 'local_ltiprovider'));

$mform->addElement('checkbox', 'hidepageheader', null, get_string('hidepageheader', 'local_ltiprovider'));

$mform->addElement('checkbox', 'hidepagefooter', null, get_string('hidepagefooter', 'local_ltiprovider'));

$mform->addElement('checkbox', 'hideleftblocks', null, get_string('hideleftblocks', 'local_ltiprovider'));

$mform->addElement('checkbox', 'hiderightblocks', null, get_string('hiderightblocks', 'local_ltiprovider'));

$mform->setAdvanced('hideleftblocks');

$mform->setAdvanced('hiderightblocks');

$editoroptions = array();

$displayoptions = array('rows'=>'4', 'cols'=>'');

$mform->addElement('textarea', 'customcss', get_string('customcss', 'local_ltiprovider'), $displayoptions, $editoroptions);

$mform->setAdvanced('customcss');

$mform->addElement('hidden', 'id');

$mform->setType('id', PARAM_INT);

$mform->addElement('hidden', 'courseid');

$mform->setType('courseid', PARAM_INT);

$this->add_action_buttons();

}

public function validation($data, $files) {

global $COURSE, $DB, $CFG;

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

if (!empty($data['enrolenddate']) and $data['enrolenddate'] < $data['enrolstartdate']) {

$errors['enrolenddate'] = get_string('enrolenddaterror', 'local_ltiprovider');

}

return $errors;

}