eei/event.php at master · swlt16/eei · GitHub

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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 the 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): void
{
	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): void
{
	$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 ?>">

	<?php
	require_once 'head.php';
	?>

    <body>
    <main class="small">
        <div class="container">
            <span class='sub-title'><?= $CONFIG_TERM ?></span>
            <h1 class="title"><?= htmlspecialchars($event->name) ?></h1>
        </div>
        <div class="container">
            <div class="description">
                <span class="icon clock"></span>
                <h2><?= $event->getEventDateString() ?></h2>
            </div>

            <div class="description">
                <span class="icon marker"></span>
                <h2><?= htmlspecialchars($event->location) ?></h2>
				<?php if (!empty($event->locationMaps)): ?>
                    <span class="map-links">
						<?php foreach ($event->locationMaps as $provider => $url): ?>
							<?php
							// Validate URL and ensure it uses http/https protocol for security
							if (filter_var($url, FILTER_VALIDATE_URL) &&
								(str_starts_with($url, 'http://') || str_starts_with($url, 'https://'))):
								// Use provider-specific icons
								$iconClass = ($provider === 'google') ? 'google-maps' : 'openstreetmap';
								$providerName = ($provider === 'google') ? 'Google Maps' : 'OpenStreetMap';
							?>
                            <a href="<?= htmlspecialchars($url) ?>" target="_blank" rel="noopener noreferrer"
                               class="map-link" title="<?= htmlspecialchars($providerName) ?>">
                                <span class="icon <?= htmlspecialchars($iconClass) ?>"></span>
                            </a>
							<?php endif; ?>
						<?php endforeach; ?>
                    </span>
				<?php endif; ?>
            </div>

			<?php
			if ($event->isOpentoall()) {
				renderOpentoallNotice($event);
			} ?>

        </div>

        <div class="container">
            <div class="row">
				<?php if($event->isRegistrationEnabled()): ?>
                	<div class="event-pill"><?= $i18n['remaining'] . ": " . htmlspecialchars($event->getRemainingSpots()) ?></div>
				<?php endif; ?>
				<?php
				if ($event->dinosAllowed): ?>
                    <div class="event-pill"><?= $i18n['dinos'] ?></div>
				<?php
				endif; ?>
            </div>

			<?php if ($event->canRegister() && $event->isRegistrationEnabled()) { ?>
                <div class="deadline">
                    <span class="icon hourglass"></span>
                    <h4><?= $i18n["deadline"] ?>
                        : <?= htmlspecialchars(string: $event->getRegistrationEndDateString()) ?></h4>
                </div>
			<?php } ?>
        </div>

        <div class="container text-block info">
			<?= $event->text ?>
			<?php
			if (!empty($event->info)): ?>
                <div class=""><?= $event->info ?></div>
			<?php
			endif; ?>
        </div>
        <div class="block">
			<?php
			if ($_SERVER['REQUEST_METHOD'] === 'POST') {
				handlePostRequest($event, $registrationId);
			} else {
				if ( ! $event->isRegistrationEnabled()) {
					renderRegistrationDisabledInformation($event);
				} elseif ($registrationId) {
					renderUnsubscribeForm($event, $registrationId);
				} elseif ($event->canRegister()) {
					renderRegistrationForm($event);
				} else {
					renderErrorMessages($event);
				}
			}
			?>
            <div class="container">
                <div class="row">
                    <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>
    </main>
    </body>

    </html>
	<?php
}

function renderRegistrationDisabledInformation($event): void {
	global $i18n;
	?>
		<div class="container text-block info">
			<?= $i18n['registration_disabled'] ?>
		</div>
	<?php
}

/**
 * Renders the unsubscribe form
 * Example: Unsubscribe from an event
 *
 * @param mixed $event
 * @param mixed $registrationId
 */
function renderUnsubscribeForm($event, $registrationId): void
{
	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): void
{
	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);
		renderGenderOptions($event);
		renderAlcoholOptions($event);
		?>
        <script src="js/saveFormValues.js"></script>
        <input type="submit" value="<?= $i18n['send'] ?>" onclick="saveFormValues()">
    </form>
	<?php
}

function renderCourseOptions($event): void
{
	if (!$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($event): void
{
	if (!$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="food" value="<?= $preference ?>" required>
			<?= $preference ?>
        </label>
        <br>
		<?php
	} ?>
    <br>
	<?php
}

function renderAlcoholOptions($event): void
{
	if (!$event->form['no_alcohol']) {
		return;
	}

	global $i18n;
	?>
    <label>
        <input type="checkbox" class="form-alcohol" name="no_alcohol" value="ja">
		<?= $i18n['form_alcohol'] ?>
    </label>
    <br>
    <br>
	<?php
}

function renderFoodBreakfastOptions($event): void
{
	if (!$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="breakfast" value="<?= $preference ?>" required>
			<?= $preference ?>
        </label>
        <br>
		<?php
	} ?>
    <br>
	<?php
}

function renderGenderOptions($event): void
{
	if (!$event->form['gender']) {
		return;
	}

	global $i18n;
	echo $i18n['form_gender'] . ':<br>';
	$genderOptions = [
		$i18n['form_gender_male'],
		$i18n['form_gender_female'],
		$i18n['form_gender_other'],
	];

	foreach ($genderOptions as $option) {
		?>
        <label>
            <input type="radio" class="form-gender" name="gender" value="<?= $option ?>" required>
			<?= $option ?>
        </label>
        <br>
		<?php
	} ?>
    <br>
	<?php
}

function renderOpentoallNotice($event): void
{
	global $i18n;
	?>
		<div class="container text-block info">
			<?= $i18n['opentoall'] ?>
		</div>
	<?php
}


function renderErrorMessages($event): void
{
	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>";
}