Update instance switching feature

js/instance_switcher.js

@@ -0,0 +1,17 @@
+(function(){
+  var links = document.querySelectorAll('#wp-admin-bar-wpis li > a');
+  var listener = function(e){
+    e.preventDefault();
+    var instance = e.target.getAttribute('href').substr(1);
+    if (instance === 'exit') {
+      document.cookie = "wpp_shadow=;path=/";
+    } else {
+      document.cookie = "wpp_shadow=" + instance + ";path=/";
+    }
+    location.reload();
+  };
+
+  for(var i = 0; i < links.length; i++){
+    links[i].addEventListener('click', listener);
+  }
+})();

modules/instance_switcher.php

@@ -0,0 +1,179 @@
+<?php
+/*
+ * Plugin name: InstanceSwitcher
+ * Description: Enable users to manage their Seravo WordPress updates
+ * Version: 1.0
+ */
+
+namespace Seravo;
+
+if (!class_exists('InstanceSwitcher')) {
+  class InstanceSwitcher {
+
+    public static function load() {
+      // only run the instance switcher when in a container environment
+      if( ! getenv('CONTAINER') ) {
+        return;
+      }
+
+      // admin ajax action
+      add_action( 'wp_ajax_wpis_change_container', array( 'Seravo\InstanceSwitcher', 'change_wp_container' ) );
+      add_action( 'wp_ajax_nopriv_wpis_change_container', array( 'Seravo\InstanceSwitcher', 'change_wp_container' ) );
+
+      // styles and scripts for the switcher
+      add_action( 'admin_enqueue_scripts', array( 'Seravo\InstanceSwitcher', 'assets' ), 999);
+      add_action( 'wp_enqueue_scripts', array( 'Seravo\InstanceSwitcher', 'assets' ), 999);
+
+      // add the instance switcher menu
+      add_action( 'admin_bar_menu', array( 'Seravo\InstanceSwitcher', 'add_switcher' ), 999 );
+
+      // display a notice at the bottom of the window when in a shadow
+      if ( getenv('WP_ENV') && getenv('WP_ENV') != 'production' ) {
+        add_action('admin_footer', array( 'Seravo\InstanceSwitcher', 'render_shadow_indicator' ) );
+        add_action('wp_footer', array( 'Seravo\InstanceSwitcher', 'render_shadow_indicator' ) );
+        add_action('login_footer', array( 'Seravo\InstanceSwitcher', 'render_shadow_indicator' ) );
+        add_action('admin_notices', array( 'Seravo\InstanceSwitcher', 'render_shadow_admin_notice' ) );
+      }
+    }
+
+    public static function register_updates_page() {
+      if ( getenv('SERAVO_API_KEY') != '' ) {
+        add_submenu_page( 'tools.php', 'Instance Switcher', 'Instance Switcher', 'manage_options', 'updates_page', array(__CLASS__, 'load_updates_page') );
+      }
+    }
+
+    public static function load_updates_page() {
+      require_once(dirname( __FILE__ ) . '/../lib/updates-page.php');
+    }
+
+    /**
+    * Load javascript and stylesheets for the switcher
+    */
+    public static function assets(){
+      if ( !function_exists( 'is_admin_bar_showing' ) ) {
+        return;
+      }
+
+      // use this within the admin bar
+      if ( !is_admin_bar_showing() ) {
+        return;
+      }
+
+      wp_enqueue_script( 'wpisjs', plugins_url( '../js/instance_switcher.js' , __FILE__), null, null, true );
+      wp_enqueue_style( 'wpisjs', plugins_url( '../style/instance_switcher.css' , __FILE__), null, null, 'all' );
+    }
+
+    public static function load_shadow_list(){
+      if ( ( $shadow_list = get_transient( 'shadow_list' ) ) === false ) {
+        $site = getenv('USER');
+        $ch = curl_init('http://localhost:8888/v1/site/' . $site . '/shadows');
+        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+        curl_setopt($ch, CURLOPT_HTTPHEADER, array('X-Api-Key: ' . getenv('SERAVO_API_KEY')));
+        $response = curl_exec($ch);
+        $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+
+        if (curl_error($ch) || $httpcode != 200) {
+          error_log('SWD API error '. $httpcode .': '. curl_error($ch));
+          die('API call failed: ' . curl_error($ch));
+        }
+
+        curl_close($ch);
+        $shadow_list = json_decode($response, true);
+        set_transient( 'shadow_list', $shadow_list, 10 * MINUTE_IN_SECONDS );
+      }
+
+      return $shadow_list;
+    }
+
+    /**
+    * Create the menu itself
+    */
+    public static function add_switcher(  $wp_admin_bar ){
+
+      if ( ! function_exists( 'is_admin_bar_showing' ) ) {
+        return;
+      }
+
+      // use this within the admin bar
+      if ( ! is_admin_bar_showing() ) {
+        return;
+      }
+
+      // check permissions
+      if( ! current_user_can( 'activate_plugins' )){
+        return;
+      }
+
+      $instances = InstanceSwitcher::load_shadow_list();
+
+      if( empty( $instances ) ) {
+        return;
+      }
+
+      $id = 'wpis';
+      $domain = ""; //$this->get_domain( $_SERVER['HTTP_HOST'] );
+
+      if ( getenv('WP_ENV') && getenv('WP_ENV') != 'production' ) {
+        $menuclass = 'wpis-warning';
+      }
+
+      $current_title = getenv('WP_ENV');
+
+      // create the parent menu here
+      $wp_admin_bar->add_menu([
+        'id' => $id,
+        'title' => $current_title,
+        'href' => '#',
+        'meta' => [
+          'class' => $menuclass,
+        ],
+      ]);
+
+      // add menu entries for each shadow
+      foreach($instances as $key => $instance) {
+        $title = $instance["env"];
+
+        if ( strlen( $instance["info"] ) > 0 ) {
+          $title .= " (" . $instance["info"] . ")";
+        }
+
+        $wp_admin_bar->add_menu([
+          'parent' => $id,
+          'title' => $title,
+          'id' => $instance["name"],
+          'href' => "#" . substr($instance["name"], 6),
+        ]);
+      }
+
+      // Last item is always to exit shadow
+      $wp_admin_bar->add_menu(array(
+        'parent' => $id,
+        'title' => __('Exit Shadow', 'seravo-plugin'),
+        'id' => 'exit-shadow',
+        'href' => "#exit",
+      ));
+    }
+
+    public static function render_shadow_indicator() {
+?>
+      <style>#shadow-indicator { font-family: Arial, sans-serif; position: fixed; bottom: 0; left: 0; right: 0; width: 100%; color: #fff; background: #cc0000; z-index: 3000; font-size:16px; line-height: 1; text-align: center; padding: 5px } #shadow-indicator a.clearlink { text-decoration: underline; color: #fff; }</style>
+      <div id="shadow-indicator">
+      <?php echo wp_sprintf( __('You are currently in %s.', 'seravo-plugin'), getenv( 'WP_ENV' ) ); ?> <a class="clearlink" href="/?wpp_shadow=clear"><?php _e('Exit', 'seravo-plugin'); ?></a>
+      </div>
+<?php
+    }
+
+    /**
+    * Let plugins or themes display admin notice when inside a shadow
+    */
+    public static function render_shadow_admin_notice( $current_screen ) {
+      $current_screen = get_current_screen();
+      $admin_notice_content = apply_filters( 'seravo_instance_switcher_admin_notice', '', $current_screen );
+      if(!empty($admin_notice_content)) {
+        echo $admin_notice_content;
+      }
+    }
+  }
+
+  InstanceSwitcher::load();
+}

seravo-plugin.php

@@ -168,6 +168,14 @@ public static function loadAllModules() {
     if (apply_filters('seravo_show_domains_page',true)) {
       require_once(dirname( __FILE__ ) . '/modules/domains.php');
     }
+
+    /*
+     * Instance switcher
+     */
+    if ( apply_filters('seravo_show_instance_switcher', true) ) {
+      require_once(dirname( __FILE__ ) . '/modules/instance_switcher.php');
+    }
+
   }
 }
 

style/instance_switcher.css

@@ -0,0 +1,4 @@
+#wp-admin-bar-wpis.wpis-warning > a {
+  background-color: #cc0000;
+}
+