free-wordpress/fwp-calendar
free-wordpress/fwp-calendar
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BAsic functionality

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j 2025-06-16 17:13:46 +10:00
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<?php
/**
* Plugin Name: Free WordPress Calendar
* Plugin URI: https://example.com/
* Description: Display multiple iCal feeds in a calendar and show upcoming events with a shortcode.
* Version: 1.0
* Author: Your Name
* License: GPL2
* Text Domain: fwp-calendar
*/
require_once plugin_dir_path(__FILE__) . 'ical/ical.php';
require_once plugin_dir_path(__FILE__) . 'ical/event.php';
use ICal\ICal;
class FWP_Calendar {
private $option_name = 'fwp_calendar_urls';
public function __construct() {
add_action('admin_menu', [$this, 'admin_menu']);
add_action('admin_init', [$this, 'register_settings']);
add_action('wp_enqueue_scripts', [$this, 'enqueue_assets']);
add_shortcode('event-calendar', [$this, 'shortcode_handler']);
}
public function admin_menu() {
add_options_page('FWP Calendar', 'FWP Calendar', 'manage_options', 'fwp-calendar', [$this, 'settings_page']);
}
public function register_settings() {
register_setting('fwp-calendar-settings-group', $this->option_name);
}
public function enqueue_assets() {
// Enqueue FullCalendar JS and CSS from plugin folder (ensure these files exist)
wp_enqueue_script(
'fwp-calendar-fullcalendar-js',
plugins_url('fullcalendar.min.js', __FILE__),
[],
'6.1.8',
true
);
wp_enqueue_script(
'fwp-calendar-js',
plugins_url('calendar.js', __FILE__),
['fwp-calendar-fullcalendar-js'],
false,
true
);
}
public function settings_page() {
?>
<div class="wrap">
<h1>Free WordPress Calendar Settings</h1>
<form method="post" action="options.php">
<?php
settings_fields('fwp-calendar-settings-group');
$urls = get_option($this->option_name, []);
if (!is_array($urls)) {
$urls = array_filter(array_map('trim', explode("\n", $urls)));
}
?>
<table class="form-table">
<tr valign="top">
<th scope="row">iCal URLs</th>
<td>
<div id="fwp-calendar-url-list">
<?php foreach ($urls as $i => $url): ?>
<div class="fwp-url-entry" style="margin-bottom: 5px;">
<input type="text" name="<?php echo esc_attr($this->option_name); ?>[]" value="<?php echo esc_attr($url); ?>" style="width: 90%;" />
<button type="button" class="button button-small" onclick="this.parentNode.remove()">Remove</button>
</div>
<?php endforeach; ?>
</div>
<button type="button" class="button" onclick="fwpAddUrlField()">Add URL</button>
</td>
</tr>
</table>
<?php submit_button(); ?>
</form>
</div>
<script>
function fwpAddUrlField() {
const container = document.getElementById('fwp-calendar-url-list');
const wrapper = document.createElement('div');
wrapper.className = 'fwp-url-entry';
wrapper.style = 'margin-bottom: 5px;';
wrapper.innerHTML = `
<input type="text" name="<?php echo esc_attr($this->option_name); ?>[]" style="width: 90%;" />
<button type="button" class="button button-small" onclick="this.parentNode.remove()">Remove</button>
`;
container.appendChild(wrapper);
}
</script>
<?php
}
public function shortcode_handler($atts) {
$atts = shortcode_atts([
'id' => '',
'show_upcoming' => 'true',
], $atts);
$show_upcoming = filter_var($atts['show_upcoming'], FILTER_VALIDATE_BOOLEAN);
$urls = get_option($this->option_name, []);
if (!is_array($urls)) $urls = [];
if ($atts['id'] !== '') {
$key = intval($atts['id']) - 1;
if (isset($urls[$key])) {
$urls = [$urls[$key]];
} else {
return '<p>Invalid calendar ID.</p>';
}
}
$events = [];
foreach ($urls as $url) {
$url = trim($url);
$ics_content = @file_get_contents(trim($url));
if (!$ics_content) {
error_log("FWP Calendar: Failed to fetch ICS from $url");
continue;
}
try {
$parser = new ICal();
$parser->initString($ics_content); // <-- This is the fix
} catch (Exception $e) {
error_log('FWP Calendar: Failed to parse ICS: ' . $e->getMessage());
continue;
}
foreach ($parser->events() as $event) {
$start_ts = method_exists($parser, 'iCalDateToTimestamp')
? $parser->iCalDateToTimestamp($event->dtstart)
: strtotime($event->dtstart);
$end_ts = isset($event->dtend)
? (method_exists($parser, 'iCalDateToTimestamp') ? $parser->iCalDateToTimestamp($event->dtend) : strtotime($event->dtend))
: $start_ts;
$events[] = [
'title' => $event->summary ?? 'No Title',
'start' => date('c', $start_ts),
'end' => date('c', $end_ts),
'url' => $event->url ?? '',
];
}
}
ob_start();
?>
<div id="event-calendar" style="max-width: 900px; margin: auto; height: 600px;"></div>
<script>
var EventCalendar = {
events: <?php echo json_encode($events); ?>
};
</script>
<?php
if ($show_upcoming && !empty($events)) {
usort($events, function ($a, $b) {
return strtotime($a['start']) - strtotime($b['start']);
});
$now = time();
$count = 0;
echo '<div class="upcoming-events" style="max-width: 900px; margin: 2rem auto;">';
echo '<h2>Upcoming Events</h2><ul>';
foreach ($events as $event) {
$start_ts = strtotime($event['start']);
if ($start_ts >= $now) {
$start_attr = esc_attr($event['start']);
$end_attr = isset($event['end']) ? esc_attr($event['end']) : '';
echo '<li class="event-item" data-title="'.$event['title'].'" data-start="' . $start_attr . '"';
if ($end_attr !== '') {
echo ' data-end="' . $end_attr . '"';
}
echo '>';
if (!empty($event['url'])) {
echo '<a href="' . esc_url($event['url']) . '" target="_blank" rel="noopener noreferrer">' . esc_html($event['title']) . '</a>';
} else {
echo esc_html($event['title']);
}
echo '</li>';
$count++;
if ($count >= 5) break;
}
}
echo '</ul></div>';
}
return ob_get_clean();
}
}
new FWP_Calendar();