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event.php
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<?php
require_once 'config.php';
require_once 'utils.php';
require_once 'i18n/i18n.php';
require_once 'event_type.php';
global $i18n, $events, $CONFIG_TERM, $FILE_REVISION, $CONFIG_CONTACT;
// Redirect to main page if event ID is not provided or invalid.
const REDIRECT_URL = 'Location:/';
$eventId = filter_input(INPUT_GET, 'e', FILTER_SANITIZE_ENCODED);
if (!$eventId || !isset($events[$eventId])) {
header(REDIRECT_URL);
exit;
}
$event = $events[$eventId];
$registrationId = filter_input(INPUT_GET, 'r', FILTER_SANITIZE_ENCODED);
// Handle POST request, e.g. unsubscribe or register
renderPage($event, $registrationId);
/**
* Handles the POST request
* Example: Unsubscribe from an event or register for an event
* @param mixed $event
* @param mixed $registrationId
* @return void
*/
function handlePostRequest($event, $registrationId)
{
global $i18n;
if ($registrationId) {
$result = deleteRegistration($registrationId, $event);
renderMessageBlock($result[0], $result[1]);
} else {
$result = register($event);
renderMessageBlock($result[0], $result[1]);
}
}
/**
* Renders a message block
* Example: Success or error message
* @param mixed $isSuccess
* @param mixed $message
* @return void
*/
function renderMessageBlock($isSuccess, $message)
{
$class = $isSuccess ? 'info' : 'error';
echo "<div class=\"text-block $class\">$message</div>";
}
/**
* Renders the complete page
* Example: Event details, registration form, error messages
* @param mixed $event
* @param mixed $registrationId
* @return void
*/
function renderPage($event, $registrationId)
{
global $i18n, $CONFIG_TERM, $FILE_REVISION, $CONFIG_CONTACT;
$language = htmlspecialchars($i18n->getLanguage(), ENT_QUOTES);
?>
<!DOCTYPE html>
<html lang="<?= $language ?>">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="css/style.css<?= $FILE_REVISION; ?>">
<link rel="stylesheet" href="css/input.css<?= $FILE_REVISION; ?>">
<link rel="stylesheet" href="css/icons.css<?= $FILE_REVISION; ?>">
<title><?= htmlspecialchars($event->name) . " - " . $CONFIG_TERM ?></title>
</head>
<body>
<div id="center" class="small">
<h1><?= htmlspecialchars($event->name) . " - " . $CONFIG_TERM ?></h1>
<h2 class="description icon clock"><?= htmlspecialchars($event->getEventDateString()) ?></h2>
<h2 class="description icon marker"><?= htmlspecialchars($event->location) ?></h2>
<h2 class="description"><?= $i18n['remaining'] . ": " . htmlspecialchars($event->getRemainingSpots()) ?></h2>
<?php if ($event->dinosAllowed): ?>
<h4 class="description"><?= $i18n['dinos'] ?></h4>
<?php endif; ?>
<?= $event->text ?>
<?php if (!empty($event->info)): ?>
<div class="text-block info"><?= $event->info ?></div>
<?php endif; ?>
<div class="block">
<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
handlePostRequest($event, $registrationId);
} else {
if ($registrationId) {
renderUnsubscribeForm($event, $registrationId);
} elseif ($event->canRegister()) {
renderRegistrationForm($event);
} else {
renderErrorMessages($event);
}
}
?>
<div class="container">
<a href="index.php?lang=<?= $language ?>">
<div class="link"><?= $i18n['back'] ?></div>
</a>
<a href="calendar.php?e=<?= htmlspecialchars($event->link) ?>&lang=<?= $language ?>&ics">
<div class="link color-border"><?= $i18n['calendar_download'] ?></div>
</a>
</div>
</div>
</div>
</body>
</html>
<?php
}
/**
* Renders the unsubscribe form
* Example: Unsubscribe from an event
* @param mixed $event
* @return array
*/
function renderUnsubscribeForm($event, $registrationId)
{
global $i18n;
?>
<form action="event.php?e=<?= htmlspecialchars($event->link) ?>&r=<?= htmlspecialchars($registrationId) ?>"
method="post">
<div class="text-block"><?= $i18n->translate('unsubscribe_text') ?></div>
<input type="hidden" name="registration_id" value="<?= htmlspecialchars($registrationId) ?>">
<input type="submit" name="delete_registration" value="<?= $i18n->translate('unsubscribe') ?>">
</form>
<?php
}
function renderRegistrationForm($event)
{
global $i18n;
?>
<form method="post" action="#">
<label for="form-name"><?= $i18n['form_yourName'] ?>:<br>
<input type="text" id="form-name" name="name" required size="30">
</label><br><br>
<label for="form-mail"><?= $i18n['form_email'] ?>:<br>
<input type="email" id="form-mail" name="mail" required size="30">
</label><br><br>
<?php
renderCourseOptions($event);
renderFoodOptions($event);
renderFoodBreakfastOptions($event);
?>
<script src="js/saveFormValues.js"></script>
<input type="submit" value="<?= $i18n['send'] ?>" onclick="saveFormValues()">
</form>
<?php
}
function renderCourseOptions($event)
{
if (!$event->form['course_required']) {
return;
}
global $i18n;
echo $i18n['form_study_programme'] . ':<br>';
$courses = [
['Informatik', 'form_cs'],
['Lehramt', 'form_cs_ed'],
['Bioinformatik', 'form_cs_bio'],
['Medizininformatik', 'form_cs_med'],
['Medieninformatik', 'form_cs_media'],
['Maschinelles Lernen', 'form_ml'],
['Kognitionswissenschaft', 'form_cog'],
['Nebenfach', 'form_subsidiary']
];
foreach ($courses as $course) {
?>
<label>
<input type="radio" class="form-studiengang" name="studiengang" value="<?= $course[0] ?>" required>
<?= $i18n[$course[1]] ?>
</label>
<br>
<?php } ?>
<br><?= $i18n['form_degree'] ?>:<br>
<?php
// Degree
$degrees = ['Bachelor', 'Master'];
foreach ($degrees as $degree) {
?>
<label>
<input type="radio" class="form-abschluss" name="abschluss" value="<?= $degree ?>" required>
<?= $degree ?>
</label>
<br>
<?php } ?>
<br>Semester: <br>
<?php
// Semester
$semesters = ['1', '2', '3', $i18n['form_many']];
foreach ($semesters as $semester) {
?>
<label>
<input type="radio" class="form-semester" name="semester" value="<?= $semester ?>" required>
<?= $semester ?>
</label>
<br>
<?php } ?>
<br>
<?php
}
function renderFoodOptions($event)
{
if (!$event->form['food']) {
return;
}
global $i18n;
echo $i18n['form_food'] . ':<br>';
$foodPreferences = [
$i18n['form_food_no_preference'],
$i18n['form_food_vegetarian'],
$i18n['form_food_vegan'],
$i18n['form_food_no_pork']
];
foreach ($foodPreferences as $preference) {
?>
<label>
<input type="radio" class="form-essen" name="essen" value="<?= $preference ?>" required>
<?= $preference ?>
</label>
<br>
<?php } ?>
<br>
<?php
}
function renderFoodBreakfastOptions($event)
{
if (!$event->form['breakfast']) {
return;
}
global $i18n;
echo $i18n['form_breakfast'] . ':<br>';
$foodPreferences = [
$i18n['form_food_no_preference'],
$i18n['form_food_sweet'],
$i18n['form_food_salty'],
];
foreach ($foodPreferences as $preference) {
?>
<label>
<input type="radio" class="form-fruehstueck" name="fruestueck" value="<?= $preference ?>" required>
<?= $preference ?>
</label>
<br>
<?php } ?>
<br>
<?php
}
function renderErrorMessages($event)
{
global $i18n, $CONFIG_CONTACT;
echo "<div class=\"text-block error\">";
if ($event->cancelled) {
echo $i18n->translate('event_cancelled', ['EVENT_NAME' => $event->name, 'EMAIL_CONTACT' => $CONFIG_CONTACT]);
} elseif ($event->getRemainingSpots() == 0) {
echo $i18n['event_full'];
} elseif (!$event->isUpcoming()) {
echo $i18n['event_is_past'];
} elseif (time() < $event->getRegistrationStartUTS()) {
echo $i18n->translate('start_of_registration', ['REGISTRATION_DATE' => $event->getRegistrationDateString()]);
} elseif (time() > $event->getRegistrationEndUTS()) {
echo $i18n['end_of_registration'];
}
echo "</div>";
}