From 981ff42eaa982a538de856fc5302fc58b6846b17 Mon Sep 17 00:00:00 2001
From: Vontainment <djav1985@gmail.com>
Date: Wed, 9 Jul 2025 10:50:27 -0400
Subject: [PATCH] Add multisite theme updater MU plugin

---
 mu-plugin/v-sys-theme-updater-mu.php | 114 +++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 mu-plugin/v-sys-theme-updater-mu.php

diff --git a/mu-plugin/v-sys-theme-updater-mu.php b/mu-plugin/v-sys-theme-updater-mu.php
new file mode 100644
index 0000000..4e4351e
--- /dev/null
+++ b/mu-plugin/v-sys-theme-updater-mu.php
@@ -0,0 +1,114 @@
+<?php
+/**
+ * Project: UpdateAPI
+ * Author:  Vontainment <services@vontainment.com>
+ * License: https://opensource.org/licenses/MIT MIT License
+ * Link:    https://vontainment.com
+ * Version: 3.0.0
+ *
+ * File: v-sys-theme-updater-mu.php
+ * Description: WordPress Update API
+ *
+ * Plugin Name: WP Theme Updater MU
+ * Plugin URI: https://vontainment.com
+ * Description: This plugin updates your WordPress themes.
+ * Version: 1.0.0
+ * Author: Vontainment
+ * Author URI: https://vontainment.com
+ * @package VontainmentThemeUpdaterMU
+*/
+
+if (! defined('ABSPATH')) {
+    exit;
+}
+
+// Schedule the update check to run every day on the main site.
+add_action('wp', 'vontmnt_theme_updater_schedule_updates');
+
+/**
+ * Schedule daily theme update checks for multisite.
+ *
+ * @package UpdateAPI
+ * @author  Vontainment <services@vontainment.com>
+ * @license https://opensource.org/licenses/MIT MIT License
+ * @link    https://vontainment.com
+ */
+function vontmnt_theme_updater_schedule_updates(): void
+{
+    if (! is_main_site()) {
+        return;
+    }
+    if (! wp_next_scheduled('vontmnt_theme_updater_check_updates')) {
+        wp_schedule_event(time(), 'daily', 'vontmnt_theme_updater_check_updates');
+    }
+}
+
+add_action('vontmnt_theme_updater_check_updates', 'vontmnt_theme_updater_run_updates');
+
+/**
+ * Run theme updates for all installed themes on the main site.
+ *
+ * @package UpdateAPI
+ * @author  Vontainment <services@vontainment.com>
+ * @license https://opensource.org/licenses/MIT MIT License
+ * @link    https://vontainment.com
+ */
+function vontmnt_theme_updater_run_updates(): void
+{
+    if (! is_main_site()) {
+        return;
+    }
+    if (! function_exists('wp_get_themes')) {
+        require_once ABSPATH . 'wp-includes/theme.php';
+    }
+    $themes = wp_get_themes();
+    foreach ($themes as $theme) {
+        $theme_slug        = $theme->get_stylesheet();
+        $installed_version = $theme->get('Version');
+        $api_url = add_query_arg(
+            array(
+             'type'    => 'theme',
+             'domain'  => rawurlencode(wp_parse_url(site_url(), PHP_URL_HOST)),
+             'slug'    => rawurlencode($theme_slug),
+             'version' => rawurlencode($installed_version),
+             'key'     => VONTMENT_KEY,
+            ),
+            VONTMENT_THEMES
+        );
+
+        $response      = wp_remote_get($api_url);
+        $http_code     = wp_remote_retrieve_response_code($response);
+        $response_body = wp_remote_retrieve_body($response);
+
+        if ($http_code === 200 && ! empty($response_body)) {
+            require_once ABSPATH . 'wp-admin/includes/file.php';
+            $upload_dir     = wp_upload_dir();
+            $theme_zip_file = $upload_dir['path'] . '/' . basename($theme_slug) . '.zip';
+            file_put_contents($theme_zip_file, $response_body);
+
+            global $wp_filesystem;
+            if (empty($wp_filesystem)) {
+                require_once ABSPATH . '/wp-admin/includes/file.php';
+                WP_Filesystem();
+            }
+
+            require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
+            $upgrader = new Theme_Upgrader();
+            $callback = function ($options) use ($theme_zip_file) {
+                $options['package']           = $theme_zip_file;
+                $options['clear_destination'] = true;
+                return $options;
+            };
+            add_filter('upgrader_package_options', $callback);
+            $upgrader->install($theme_zip_file);
+            remove_filter('upgrader_package_options', $callback);
+
+            // Delete the theme zip file using wp_delete_file.
+            wp_delete_file($theme_zip_file);
+        } elseif ($http_code === 204) {
+            continue;
+        } else {
+            break;
+        }
+    }
+}