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application/helpers/asset_helper.php

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+<?php defined('BASEPATH') or exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Online Appointment Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) Alex Tselegidis
+ * @license     https://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        https://easyappointments.org
+ * @since       v1.3.0
+ * ---------------------------------------------------------------------------- */
+
+/**
+ * Assets URL helper function.
+ *
+ * This function will create an asset file URL that includes a cache busting parameter in order
+ * to invalidate the browser cache in case of an update.
+ *
+ * @param string $uri Relative URI (just like the one used in the base_url helper).
+ * @param string|null $protocol Valid URI protocol.
+ *
+ * @return string Returns the final asset URL.
+ */
+function asset_url(string $uri = '', ?string $protocol = null): string
+{
+    $debug = config('debug');
+
+    $cache_busting_token = !$debug ? '?' . config('cache_busting_token') : '';
+
+    if (str_contains(basename($uri), '.js') && !str_contains(basename($uri), '.min.js') && !$debug) {
+        $uri = str_replace('.js', '.min.js', $uri);
+    }
+
+    if (str_contains(basename($uri), '.css') && !str_contains(basename($uri), '.min.css') && !$debug) {
+        $uri = str_replace('.css', '.min.css', $uri);
+    }
+
+    return base_url($uri . $cache_busting_token, $protocol);
+}