Add custom navigation demo

Author: joedolson

my-calendar/mc-custom-navigation-elements.php

@@ -0,0 +1,71 @@
+<?php
+/**
+ * Add custom navigation elements
+ *
+ * @package     My Calendar custom navigation
+ * @author      Joe Dolson
+ * @copyright   2022 Joe Dolson
+ * @license     GPL-2.0+
+ *
+ * @wordpress-plugin
+ * Plugin Name: My Calendar custom navigation
+ * Plugin URI:  http://localhost
+ * Description: Demonstrates how to render custom information in the calendar header or footer.
+ * Author:      Joseph C Dolson
+ * Author URI:  https://www.joedolson.com
+ * Text Domain: localhost
+ * License:     GPL-2.0+
+ * License URI: http://www.gnu.org/license/gpl-2.0.txt
+ * Domain Path: lang
+ * Version:     1.0.0
+ */
+
+/*
+	Copyright 2022 Joe Dolson
+
+	This program 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 2 of the License, or
+	(at your option) any later version.
+
+	This program 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 this program; if not, write to the Free Software
+	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+// Exit if accessed directly.
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Create your custom navigation item using the current view's parameters. All this example does is print the current parameters in the menu. 
+ *
+ * @param array $params Parameters for the current view.
+ *
+ * @return string HTML for navigation item.
+ */
+function my_custom_nav_item( $params ) {
+	return '<pre>' . print_r( $params, 1 ) . '</pre>';
+}
+
+/**
+ * Return a custom navigation item in the header. (Can do same thing with filter `mc_footer_navigation`).
+ *
+ * @param array $in Array of currently selected navigation parameters.
+ * @param array $used Array of all navigation parameters currently in use for this calendar view.
+ * @param array $params Parameters specifying this view.
+ *
+ * @return array
+ */
+function mc_add_custom_nav( $in, $used, $params ) {
+	$in[] = 'my_custom_nav_item';
+
+	return $in;
+}
+add_filter( 'mc_header_navigation', 'mc_add_custom_nav', 10, 3 );