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echocenter_frame.php
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echocenter_frame.php
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<?php //$Id$
// This file is part of the Echo360 Moodle Plugin - http://moodle.org/
//
// The Echo360 Moodle Plugin is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The Echo360 Moodle Plugin is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with the Echo360 Moodle Plugin. If not, see <http://www.gnu.org/licenses/>.
/**
* This file writes a moodle course page with an iframe that embeds the echocenter. It checks for
* EchoSystem errors and prints a moodle error if it finds a problem (eg section missing)
*
* @package block
* @subpackage echo360_echocenter
* @copyright 2011 Echo360 Inc
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
// includes
require_once('../../config.php');
require_once('../../course/lib.php');
require_once('locallib.php');
$id = required_param('id', PARAM_INT);
global $DB, $CFG, $COURSE, $PAGE, $OUTPUT;
$PAGE->set_url('/blocks/echo360_echocenter/echocenter_frame.php');
require_login($id);
// load the course context for permission checks
$context = get_context_instance(CONTEXT_COURSE, $COURSE->id);
$echocenter_str = get_string('echocenter', 'block_echo360_echocenter');
$navlinks = array();
$navlinks[] = array('name' => $echocenter_str, 'link' => null, 'type' => 'misc');
$navigation = build_navigation($navlinks);
$PAGE->requires->css('/blocks/echo360_echocenter/styles.css');
echo $OUTPUT->header("$COURSE->shortname: $echocenter_str", $COURSE->fullname, $navigation, '');
echo $OUTPUT->heading(format_string($COURSE->fullname) . ": $echocenter_str", 3, 'main');
// get a url to generate a session
$essapi = new echosystem_remote_api($CFG->block_echo360_configuration_echosystem_url, $CFG->block_echo360_configuration_trusted_system_consumer_key, $CFG->block_echo360_configuration_trusted_system_consumer_secret);
$mapping = $CFG->block_echo360_configuration_moodle_external_id_field;
if ($mapping === 'idnumbercourse') {
$mapping = 'idnumber';
}
$error_message = "";
$error_detail = "";
// Check they can view this block
if (!has_capability("block/echo360_configuration:viewasinstructor", $context) &&
!has_capability("block/echo360_configuration:viewasstudent", $context)) {
$error_message = 'no_view_capability';
} else {
// Generate a signed url and use it to check for 404 (mapping not configured)
$signedresponse = $essapi->generate_sso_url($USER, has_capability("block/echo360_configuration:viewasinstructor", $context), $COURSE->$mapping, false);
//print_object($signedresponse);
if ($signedresponse['success']) {
// we want to test for a 404
$curl = $essapi->get_curl_with_defaults();
$headers = $essapi->get_headers($curl, $signedresponse['url'], 0);
// echo "Headers:<br/>";
// print_object($headers);
if (!strstr($headers[0]['http'], "302")) {
$error_message = 'unexpected_response';
$e = explode(" ", $headers[0]['http'], 3);
$error_detail = $e[2];
}
/*
else if (strstr($headers[1]['http'], "404")) {
$error_message = 'not_found_response';
$e = explode(" ", $headers[1]['http'], 3);
$error_detail = $e[2];
} else if (strstr($headers[1]['http'], "403")) {
$error_message = 'forbidden_response';
$e = explode(" ", $headers[1]['http'], 3);
$error_detail = $e[2];
} else if (!strstr($headers[1]['http'], "200")) {
$error_message = 'unexpected_response';
$e = explode(" ", $headers[1]['http'], 3);
$error_detail = $e[2];
}
*/
curl_close($curl);
} else {
$error_message = 'error_generating_url';
}
}
if ($error_message == "") {
// all good - but we already used the request - need to sign again (generate a new nonce)
$signedresponse = $essapi->generate_sso_url($USER, has_capability("block/echo360_configuration:viewasinstructor", $context), $COURSE->$mapping, false);
?>
<div class="echocentercontrols"><a href="direct_link.php?id=<?php p($id); ?>" target="_blank" title="<?php print_string('openinnewwindow', 'block_echo360_echocenter'); ?>"><img src="<?php print($CFG->wwwroot .'/blocks/echo360_echocenter/pix/newwindow.png'); ?>" alt="<?php print_string('openinnewwindow', 'block_echo360_echocenter'); ?>" width="24" height="24"/></a></div>
<iframe src="<?php p($signedresponse['url']); ?>" width="100%" height="1200">
<p>Your browser does not support iframes.</p>
</iframe>
<?php
} else {
print_error($error_message, 'block_echo360_echocenter', '', $error_detail);
}
echo $OUTPUT->footer($COURSE);
?>