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<title>[25566] trunk/src: Add a language pack upgrader class.</title>
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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://core.trac.wordpress.org/changeset/25566">25566</a></dd>
<dt>Author</dt> <dd>nacin</dd>
<dt>Date</dt> <dd>2013-09-23 02:07:51 +0000 (Mon, 23 Sep 2013)</dd>
</dl>

<h3>Log Message</h3>
<pre>Add a language pack upgrader class.

At the conclusion of any upgrade, after the transients are refreshed from the API, pending translations are downloaded and installed to wp-content/languages.

props dd32.
see <a href="http://core.trac.wordpress.org/ticket/18200">#18200</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpadminincludesclasswpupgraderskinsphp">trunk/src/wp-admin/includes/class-wp-upgrader-skins.php</a></li>
<li><a href="#trunksrcwpadminincludesclasswpupgraderphp">trunk/src/wp-admin/includes/class-wp-upgrader.php</a></li>
<li><a href="#trunksrcwpadminincludesupdatephp">trunk/src/wp-admin/includes/update.php</a></li>
<li><a href="#trunksrcwpincludesupdatephp">trunk/src/wp-includes/update.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpadminincludesclasswpupgraderskinsphp"></a>
<div class="modfile"><h4>Modified: trunk/src/wp-admin/includes/class-wp-upgrader-skins.php (25565 => 25566)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/src/wp-admin/includes/class-wp-upgrader-skins.php  2013-09-23 00:37:34 UTC (rev 25565)
+++ trunk/src/wp-admin/includes/class-wp-upgrader-skins.php     2013-09-23 02:07:51 UTC (rev 25566)
</span><span class="lines">@@ -608,4 +608,18 @@
</span><span class="cx">  function bulk_footer() {}
</span><span class="cx">  function before() {}
</span><span class="cx">  function after() {}
</span><del>-}
</del><span class="cx">\ No newline at end of file
</span><ins>+}
+
+/**
+ * A basic Upgrader skin which doesn't have any headers or footers.
+ *
+ * @package WordPress
+ * @subpackage Upgrader
+ * @since 3.7.0
+ */
+class Headerless_Upgrader_Skin extends WP_Upgrader_Skin {
+       function before() {}
+       function after() {}
+       function header() {}
+       function footer() {}
+}
</ins></span></pre></div>
<a id="trunksrcwpadminincludesclasswpupgraderphp"></a>
<div class="modfile"><h4>Modified: trunk/src/wp-admin/includes/class-wp-upgrader.php (25565 => 25566)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/src/wp-admin/includes/class-wp-upgrader.php        2013-09-23 00:37:34 UTC (rev 25565)
+++ trunk/src/wp-admin/includes/class-wp-upgrader.php   2013-09-23 02:07:51 UTC (rev 25566)
</span><span class="lines">@@ -1073,6 +1073,127 @@
</span><span class="cx"> 
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+add_action( 'upgrader_process_complete', array( 'Language_Pack_Upgrader', 'async_upgrade' ), 20, 3 );
+class Language_Pack_Upgrader extends WP_Upgrader {
+
+       var $result;
+       var $bulk = true;
+
+       static function async_upgrade( $upgrader, $context, $package ) {
+               // Avoid recursion.
+               if ( $upgrader instanceof Language_Pack_Upgrader )
+                       return;
+
+               $lp_upgrader = new Language_Pack_Upgrader( new Headerless_Upgrader_Skin() );
+               $lp_upgrader->upgrade();
+       }
+
+       function upgrade_strings() {
+               $this->strings['starting_upgrade'] = __( 'Some of your language files need updating. Sit tight for a few more seconds while we update them as well.' );
+               $this->strings['up_to_date'] = __( 'The language is up to date.' ); // We need to silently skip this case
+               $this->strings['no_package'] = __( 'Update package not available.' );
+               $this->strings['downloading_package'] = __( 'Downloading language update from <span class="code">%s</span>&#8230;' );
+               $this->strings['unpack_package'] = __( 'Unpacking the update&#8230;' );
+               $this->strings['process_failed'] = __( 'Language update failed.' );
+               $this->strings['process_success'] = __( 'Language updated successfully.' );
+       }
+
+       function upgrade() {
+               return $this->bulk_upgrade();
+       }
+
+       function bulk_upgrade() {
+
+               $this->init();
+               $this->upgrade_strings();
+
+               $language_updates = wp_get_translation_updates();
+
+               if ( empty( $language_updates ) )
+                       return true;
+
+               $this->skin->feedback( 'starting_upgrade' );
+
+               add_filter( 'upgrader_source_selection', array( &$this, 'check_package' ), 10, 3 );
+
+               $this->skin->header();
+
+               // Connect to the Filesystem first.
+               $res = $this->fs_connect( array( WP_CONTENT_DIR, WP_LANG_DIR ) );
+               if ( ! $res ) {
+                       $this->skin->footer();
+                       return false;
+               }
+
+               $results = array();
+
+               $this->update_count = count( $language_updates );
+               $this->update_current = 0;
+               foreach ( $language_updates as $language_update ) {
+
+                       $destination = WP_LANG_DIR;
+                       if ( 'plugin' == $language_update->type )
+                               $destination .= '/plugins';
+                       elseif ( 'theme' == $language_update->type )
+                               $destination .= '/themes';
+
+                       $this->update_current++;
+
+                       $options = array(
+                               'package' => $language_update->package,
+                               'destination' => $destination,
+                               'clear_destination' => false,
+                               'abort_if_destination_exists' => false, // We expect the destination to exist.
+                               'clear_working' => true,
+                               'is_multi' => true,
+                               'hook_extra' => array(
+                                       'language_update_type' => $language_update->type,
+                                       'language_update' => $language_update,
+                               )
+                       );
+
+                       $result = $this->run( $options );
+
+                       $results[] = $this->result;
+
+                       // Prevent credentials auth screen from displaying multiple times.
+                       if ( false === $result )
+                               break;
+               }
+
+               // Clean up our hooks, in case something else does an upgrade on this connection.
+               remove_filter( 'upgrader_source_selection', array( &$this, 'check_package' ), 10, 2 );
+
+               return $results;
+       }
+
+       function check_package( $source, $remote_source ) {
+               global $wp_filesystem;
+
+               if ( is_wp_error( $source ) )
+                       return $source;
+
+               // Check that the folder contains a valid language.
+               $files = $wp_filesystem->dirlist( $remote_source );
+
+               // Check to see if a .po and .mo exist in the folder.
+               $po = $mo = false;
+               foreach ( (array) $files as $file => $filedata ) {
+                       if ( '.po' == substr( $file, -3 ) )
+                               $po = true;
+                       elseif ( '.mo' == substr( $file, -3 ) )
+                               $mo = true;
+               }
+
+               if ( ! $mo || ! $po )
+                       return new WP_Error( 'incompatible_archive', $this->strings['incompatible_archive'],
+                               __( 'The language pack is missing either the <code>.po</code> or <code>.mo</code> files.' ) );
+
+               return $source;
+       }
+
+}
+
</ins><span class="cx"> /**
</span><span class="cx">  * Core Upgrader class for WordPress. It allows for WordPress to upgrade itself in combination with the wp-admin/includes/update-core.php file
</span><span class="cx">  *
</span></span></pre></div>
<a id="trunksrcwpadminincludesupdatephp"></a>
<div class="modfile"><h4>Modified: trunk/src/wp-admin/includes/update.php (25565 => 25566)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/src/wp-admin/includes/update.php   2013-09-23 00:37:34 UTC (rev 25565)
+++ trunk/src/wp-admin/includes/update.php      2013-09-23 02:07:51 UTC (rev 25566)
</span><span class="lines">@@ -379,3 +379,25 @@
</span><span class="cx">  echo "<div class='update-nag'>$msg</div>";
</span><span class="cx"> }
</span><span class="cx"> add_action( 'admin_notices', 'maintenance_nag' );
</span><ins>+
+/**
+ * Retrieves a list of all language updates available.
+ *
+ * @since 3.7.0
+ */
+function wp_get_translation_updates() {
+       $updates = array();
+       $transients = array( 'update_core' => 'core', 'update_plugins' => 'plugin', 'update_themes' => 'theme' );
+       foreach ( $transients as $transient => $type ) {
+
+               $transient = get_site_transient( $transient );
+               if ( empty( $transient->translations ) )
+                       continue;
+
+               foreach ( $transient->translations as $translation ) {
+                       $updates[] = (object) $translation;
+               }
+       }
+
+       return $updates;
+}
</ins></span></pre></div>
<a id="trunksrcwpincludesupdatephp"></a>
<div class="modfile"><h4>Modified: trunk/src/wp-includes/update.php (25565 => 25566)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/src/wp-includes/update.php 2013-09-23 00:37:34 UTC (rev 25565)
+++ trunk/src/wp-includes/update.php    2013-09-23 02:07:51 UTC (rev 25566)
</span><span class="lines">@@ -158,6 +158,9 @@
</span><span class="cx"> 
</span><span class="cx">  // Check for update on a different schedule, depending on the page.
</span><span class="cx">  switch ( current_filter() ) {
</span><ins>+               case 'upgrader_process_complete' :
+                       $timeout = 0;
+                       break;
</ins><span class="cx">           case 'load-update-core.php' :
</span><span class="cx">                  $timeout = MINUTE_IN_SECONDS;
</span><span class="cx">                  break;
</span><span class="lines">@@ -283,6 +286,9 @@
</span><span class="cx"> 
</span><span class="cx">  // Check for update on a different schedule, depending on the page.
</span><span class="cx">  switch ( current_filter() ) {
</span><ins>+               case 'upgrader_process_complete' :
+                       $timeout = 0;
+                       break;
</ins><span class="cx">           case 'load-update-core.php' :
</span><span class="cx">                  $timeout = MINUTE_IN_SECONDS;
</span><span class="cx">                  break;
</span><span class="lines">@@ -485,18 +491,21 @@
</span><span class="cx"> 
</span><span class="cx"> add_action( 'admin_init', '_maybe_update_core' );
</span><span class="cx"> add_action( 'wp_version_check', 'wp_version_check' );
</span><ins>+add_action( 'upgrader_process_complete', 'wp_version_check' );
</ins><span class="cx"> 
</span><span class="cx"> add_action( 'load-plugins.php', 'wp_update_plugins' );
</span><span class="cx"> add_action( 'load-update.php', 'wp_update_plugins' );
</span><span class="cx"> add_action( 'load-update-core.php', 'wp_update_plugins' );
</span><span class="cx"> add_action( 'admin_init', '_maybe_update_plugins' );
</span><span class="cx"> add_action( 'wp_update_plugins', 'wp_update_plugins' );
</span><ins>+add_action( 'upgrader_process_complete', 'wp_update_plugins' );
</ins><span class="cx"> 
</span><span class="cx"> add_action( 'load-themes.php', 'wp_update_themes' );
</span><span class="cx"> add_action( 'load-update.php', 'wp_update_themes' );
</span><span class="cx"> add_action( 'load-update-core.php', 'wp_update_themes' );
</span><span class="cx"> add_action( 'admin_init', '_maybe_update_themes' );
</span><span class="cx"> add_action( 'wp_update_themes', 'wp_update_themes' );
</span><ins>+add_action( 'upgrader_process_complete', 'wp_update_themes' );
</ins><span class="cx"> 
</span><span class="cx"> // Automatic Updates - Cron callback
</span><span class="cx"> add_action( 'wp_auto_updates_maybe_update', 'wp_auto_updates_maybe_update' );
</span></span></pre>
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