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index.php
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index.php
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<?php
// error_reporting(E_ALL);
// ini_set('display_errors',1);
// authorized API access for a dummy project that can only be requested from [anon.]csug.rochester.edu (128.151.69.98)
$uct_callink_key = 'AIzaSyB6xPrZcyxXHdWvXrx3GUWeEGczw42YdLQ';
// calendar to read
$uct_cal_id = '04lnqg1jsbtupnkq09esf5ccpo@group.calendar.google.com';
// API request constructions
// base URL
$api_base = 'https://www.googleapis.com/calendar/v3/';
// request for events in a week
$api_events_list = "calendars/$uct_cal_id/events?";
// request for events in a week: GET params
$api_events_list_query =
array(
'key'=>$uct_callink_key,
'maxResults'=>50,
'singleEvents'=>'true',
'orderBy'=>'startTime',
//set 'timeMin' and 'timeMax' below when doing actual query
);
// csug-tutoring defaults
$def_location = 'Hylan 301';
$def_class_list = 'CSC 171, 172';
// not PHP 5.5.0 yet!
if (!function_exists('json_last_error_msg')) {
function json_last_error_msg() {
static $errors = array(
JSON_ERROR_NONE => null,
JSON_ERROR_DEPTH => 'Maximum stack depth exceeded',
JSON_ERROR_STATE_MISMATCH => 'Underflow or the modes mismatch',
JSON_ERROR_CTRL_CHAR => 'Unexpected control character found',
JSON_ERROR_SYNTAX => 'Syntax error, malformed JSON',
JSON_ERROR_UTF8 => 'Malformed UTF-8 characters, possibly incorrectly encoded'
);
$error = json_last_error();
return array_key_exists($error, $errors) ? $errors[$error] : "Unknown error ({$error})";
}
}
// HTTP request function
function curl_get_json($url, $query_object = array()) {
$url .= http_build_query($query_object);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$json = curl_exec($ch);
if ($json === false) {
if (curl_errno($ch)) {
return array('error'=>'Google API request error: '.curl_error($ch));
} else {
return array('error'=>'Google API request error: cURL failed');
}
}
$arr = json_decode($json, true);
if ($arr === null) {
if (json_last_error()) {
return array('error'=>'Google API request error: '.json_last_error_msg());
} else {
return array('error'=>'Google API request error: JSON parsing failed');
}
}
return $arr;
}
// print relevent parts of a date, where there are 3 choices:
// parts = 1: \t\h\e jS
// parts = 2: M jS
// parts = 3: M jS \o\f Y
// given $value = date to print, $now = current time (to determine which parts
// are relevant), and $minimum_parts = minimum parts value that can be used
function date_adapt($value, $now, $minimum_parts) {
$parts = $minimum_parts;
if ($parts < 1) $parts = 1;
if (date('n', $value) != date('n', $now)) {
if ($parts < 2) $parts = 2;
}
if (date('Y', $value) != date('Y', $now)) {
if ($parts < 3) $parts = 3;
}
switch ($parts) {
case 1:
$fmt = '\t\h\e jS';
break;
default:
case 2:
$fmt = 'M jS';
break;
case 3:
$fmt = 'M jS \o\f Y';
break;
}
return date($fmt, $value);
}
function display_week($week_relative_name, $week_start, $week_end, $range_start, $range_end) {
global $api_base, $api_events_list, $api_events_list_query;
global $now;
$tutoring_list = '';
$api_events_list_query['timeMin'] = date('c', $range_start);
$api_events_list_query['timeMax'] = date('c', $range_end);
$events_this_week = curl_get_json($api_base.$api_events_list, $api_events_list_query);
// check whether we had a result and print first line
if ($events_this_week === false || !isset($events_this_week['items'])) {
// $events_this_week did not have an 'items' element
$tutoring_list .= "<tr><td colspan=\"2\"><pre>Error getting tutor list for $week_relative_name week. Value of $events_this_week:\n".var_dump($events_this_week).'</pre></td></tr>';
} elseif (count($events_this_week['items']) == 0) {
// no sessions
$tutoring_list .= ($week_relative_name == 'this') ? "<tr><td colspan=\"2\">No tutoring sessions are scheduled for $week_relative_name week. This could be because it's a school vacation.</td></tr>" : '';
} else {
$week_start_v = date_adapt(strtotime('+1 day', $week_start), $now, 2);
$week_end_v = date_adapt(strtotime('-2 days', $week_end), $week_start, 1);
$tutoring_list .= "<tr><td colspan=\"2\">Tutoring sessions $week_relative_name week (the week of $week_start_v through $week_end_v):</td></tr>";
// iterate over events
foreach ($events_this_week['items'] as $event) {
$tutor = isset($event['summary']) ? htmlentities($event['summary']) : 'Tutor Name';
$start = isset($event['start']['dateTime']) ? strtotime($event['start']['dateTime']) : -1;
$end = isset($event['end']['dateTime']) ? strtotime($event['end']['dateTime']) : -1;
$location = isset($event['location']) ? htmlentities($event['location']) : $def_location;
$class_list = isset($event['description']) ? str_replace("\n", '<br/>', htmlentities($event['description'])) : $def_class_list;
if (!strlen($location)) {
$location = $def_location;
}
if (!strlen($class_list)) {
$class_list = $def_class_list;
}
if ($start <= 0 || $end <= 0) {
$tutoring_list .= '<tr><td colspan="2"><pre>Error parsing one of the returned events. Value of $event:'."\n".var_dump($event).'</pre></td></tr>';
continue;
}
if ($now > $end) {
$row_style = 'past';
} else if ($now > $start) {
$row_style = 'now';
} else if ($now > strtotime('today', $start)) {
$row_style = 'today';
} else {
$row_style = 'future';
}
$tutoring_list .= '<tr class="'.$row_style.'">'.
'<td class="tutor">'.$tutor.'</td><td>'.
date('l', $start).' '.date_adapt($start, $now, 1).' at '.
date('g:ia', $start).' - '.date('g:ia', $end)." ($row_style) in $location<br/>".
'<span class="class_list">'.$class_list.'</span></td></tr>';
//$tutoring_list .= "<tr class="
}
}
return $tutoring_list;
}
// calculations for list display
$now = time();
if (file_exists('tutors-cache.txt') && $now - filemtime('tutors-cache.txt') < 60) {
$tutoring_list = file_get_contents('tutors-cache.txt');
} else {
// do actual query
$week1_start = strtotime('+1 day', strtotime('last Saturday', $now));
$week1_end = strtotime('next Sunday', $week1_start);
$first_day = strtotime('today', $now);
$last_day = strtotime('+7 days', $first_day);
$week2_start = strtotime('+7 days', $week1_start);
$week2_end = strtotime('+7 days', $week1_end);
$tutoring_list = '<table>';
$tutoring_list .= display_week('this', $week1_start, $week1_end, $first_day, $week1_end);
$tutoring_list .= display_week('next', $week2_start, $week2_end, $week2_start, $last_day);
$tutoring_list .= '</table>';
file_put_contents('tutors-cache.txt', $tutoring_list);
$tutoring_list .= '<br>* = Will help you set up your development environment<br><br>';
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<title>Rochester CSUG Tutoring</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<!-- styles -->
<link href="assets/css/bootstrap.css" rel="stylesheet">
<link href="assets/css/bootstrap-responsive.css" rel="stylesheet">
<style type="text/css">
/*body {
padding-top: 60px;
padding-bottom: 40px;
}*/
table { padding: 0; border-spacing: 5px; border-collapse: separate; }
tr.today { background-color: #ffd; }
tr.now { background-color: #ff8; font-weight: bold; }
tr.past { color: #bbb; font-style: italic; }
span.class_list { color: #777; }
tr.past span.class_list { color: #ccc; }
td.tutor { font-weight: bold; vertical-align: top; }
</style>
<!-- HTML5 shim, for IE6-8 support of HTML5 elements -->
<!--[if lt IE 9]>
<script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<link rel="shortcut icon" href="assets/ico/favicon.ico">
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-34732780-1']);
_gaq.push(['_trackPageview']);
</script>
</head>
<body>
<!--<div class="navbar navbar-inverse navbar-fixed-top">
<div class="navbar-inner">
<div class="container">
<a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</a>
<a class="brand" href="index.html#">University of Rochester CSUG Tutoring</a>
<div class="nav-collapse collapse">
<ul class="nav">
<li class="active"><a href="index.html#">Home</a></li>
</ul>
</div>
</div>
</div>
</div>-->
<div class="container">
<a style="margin-bottom:10px;display:block" href="http://cs.rochester.edu/"><img id="logo" src="urcs-banner-old.png" alt="Department of Computer Science, part of the Hajim School of Engineering at the University of Rochester" /></a>
<div class="hero-unit">
<h1>Need CS help?</h1>
<p>You're in the right place. <img src="csug-b-256-t.png" width="32" height="32" alt="CSUG (logo)" title="Computer Science Undergraduate Council" style="cursor:help" /> offers <b>free tutoring</b> for all <b>Computer Science</b> courses.</p>
<?php echo $tutoring_list; ?>
<p><a class="btn btn-primary btn-large" href="https://www.google.com/calendar/embed?src=04lnqg1jsbtupnkq09esf5ccpo%40group.calendar.google.com&ctz=America/New_York" onClick="_gaq.push(['_trackEvent', 'Followup', 'Schedule']);">See full schedule »</a></p>
</div>
<div class="row">
<div class="span6">
<h2>Who we are</h2>
<p>We're a bunch of volunteer computer science majors looking to provide help to those who need it. Feel free to drop by and say hello.</p>
</div>
<div class="span6">
<h2>What we do</h2>
<p>We provide tutoring <b>Monday through Fridays</b> during the school year. If you're having difficulty with homework, you're stuck on a project, or you need a second pair of eyes, please stop by. Some of us are also able to help you set up your development environment!</p>
</div>
</div>
<hr>
<div class="row">
<div class="span6">
<h2>Find us</h2>
<p>You'll usually be able to find one of us in <b>Hylan 301</b> (the non-major's computer science lab) on weekdays between 9AM and 9PM. Please see our schedule for more details or changes in our location.</p>
</div>
<div class="span6">
<h2>Contact us</h2>
<p>Can't find the room? Do you have a comment or suggestion? Unable to attend any of the times? Want to become a tutor?</p>
<p><a class="btn" href="mailto:csug-tutoring@googlegroups.com">Send us an email »</a></p>
</div>
</div>
</div> <!-- /container -->
<!-- javascript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<!--script src="assets/js/jquery.js"></script>
<script src="assets/js/bootstrap-transition.js"></script>
<script src="assets/js/bootstrap-alert.js"></script>
<script src="assets/js/bootstrap-modal.js"></script>
<script src="assets/js/bootstrap-dropdown.js"></script>
<script src="assets/js/bootstrap-scrollspy.js"></script>
<script src="assets/js/bootstrap-tab.js"></script>
<script src="assets/js/bootstrap-tooltip.js"></script>
<script src="assets/js/bootstrap-popover.js"></script>
<script src="assets/js/bootstrap-button.js"></script>
<script src="assets/js/bootstrap-collapse.js"></script>
<script src="assets/js/bootstrap-carousel.js"></script>
<script src="assets/js/bootstrap-typeahead.js"></script-->
<script type="text/javascript">
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
</body>
</html>