$caller = new $callbackclass($callbackargs);
$caller->set('user', $USER);
if ($formats = explode(',', $callerformats)) {
$caller->set_formats_from_button($formats);
}
$caller->load_data();
// this must check capabilities and either throw an exception or return false.
if (!$caller->check_permissions()) {
throw new portfolio_caller_exception('nopermissions', 'portfolio', $caller->get_return_url());
}
portfolio_export_pagesetup($PAGE, $caller);
// this calls require_login($course) if it can..
// finally! set up the exporter object with the portfolio instance, and caller information elements
$exporter = new portfolio_exporter($instance, $caller, $callbackcomponent);
// set the export-specific variables, and save.
$exporter->set('user', $USER);
$exporter->save();
}
if (!$exporter->get('instance')) {
// we've just arrived but have no instance
// in this case the exporter object and the caller object have been set up above
// so just make a little form to select the portfolio plugin instance,
// which is the last thing to do before starting the export.
//
// first check to make sure there is actually a point
$options = portfolio_instance_select(portfolio_instances(), $exporter->get('caller')->supported_formats(), get_class($exporter->get('caller')), $exporter->get('caller')->get_mimetype(), 'instance', true, true);
if (empty($options)) {
throw new portfolio_export_exception($exporter, 'noavailableplugins', 'portfolio');
} else {
if (count($options) == 1) {
// no point displaying a form, just redirect.
}
// for build navigation
if (!($course = $caller->get('course'))) {
$course = $courseid;
}
// set up the course so that build_navigation works nice
$PAGE->set_course($course);
// and now we know the course for sure, call require_login with it
require_login($course);
list($extranav, $cm) = $caller->get_navigation();
$extranav[] = array('type' => 'title', 'name' => get_string('exporting', 'portfolio'));
$navigation = build_navigation($extranav, $cm);
// finally! set up the exporter object with the portfolio instance, caller information, and navigation elements
$exporter = new portfolio_exporter($instance, $caller, $callbackfile, $navigation);
// set the export-specific variables, and save.
$exporter->set('user', $USER);
$exporter->set('sesskey', sesskey());
$exporter->save();
// and finally, put it in the session for waking up again later.
$SESSION->portfolioexport = $exporter->get('id');
}
if (!$exporter->get('instance')) {
// we've just arrived but have no instance
// in this case the exporter object and the caller object have been set up above
// so just make a little form to select the portfolio plugin instance,
// which is the last thing to do before starting the export.
$mform = new portfolio_instance_select('', array('caller' => $exporter->get('caller')));
if ($mform->is_cancelled()) {
$exporter->cancel_request();
} else {
if ($fromform = $mform->get_data()) {
