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<title>[39169] trunk: I18N: Add ability to change user's locale back to site's locale.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/39169">39169</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/39169","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>swissspidy</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2016-11-08 23:00:38 +0000 (Tue, 08 Nov 2016)</dd>
</dl>

<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>I18N: Add ability to change user's locale back to site's locale.

Previously there was no way to remove the user locale setting again, even though that might be desirable.

This adds a new 'Site Default' option to the user-specific language setting by introducing a new `show_site_locale_default` argument to `wp_dropdown_languages()`.

Props ocean90.
See <a href="https://core.trac.wordpress.org/ticket/29783">#29783</a>.
Fixes <a href="https://core.trac.wordpress.org/ticket/38632">#38632</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpadminincludesuserphp">trunk/src/wp-admin/includes/user.php</a></li>
<li><a href="#trunksrcwpadminusereditphp">trunk/src/wp-admin/user-edit.php</a></li>
<li><a href="#trunksrcwpincludesl10nphp">trunk/src/wp-includes/l10n.php</a></li>
<li><a href="#trunksrcwpincludesrestapiendpointsclasswprestuserscontrollerphp">trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php</a></li>
<li><a href="#trunktestsphpunittestsl10nphp">trunk/tests/phpunit/tests/l10n.php</a></li>
<li><a href="#trunktestsphpunittestsrestapirestuserscontrollerphp">trunk/tests/phpunit/tests/rest-api/rest-users-controller.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpadminincludesuserphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/includes/user.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/includes/user.php      2016-11-08 22:40:28 UTC (rev 39168)
+++ trunk/src/wp-admin/includes/user.php        2016-11-08 23:00:38 UTC (rev 39169)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -98,11 +98,13 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                if ( isset( $_POST['locale'] ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $locale = sanitize_text_field( $_POST['locale'] );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        if ( ! in_array( $locale, get_available_languages(), true ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( 'site-default' === $locale ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                                 $locale = '';
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        } elseif ( ! in_array( $locale, get_available_languages(), true ) ) {
+                               $locale = 'en_US';
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $user->locale = ( '' === $locale ) ? 'en_US' : $locale;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $user->locale = $locale;
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="trunksrcwpadminusereditphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/user-edit.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/user-edit.php  2016-11-08 22:40:28 UTC (rev 39168)
+++ trunk/src/wp-admin/user-edit.php    2016-11-08 23:00:38 UTC (rev 39169)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -284,9 +284,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $user_locale = $profileuser->locale;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                if ( 'en_US' === $user_locale ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $user_locale = false;
-               } elseif ( ! in_array( $user_locale, $languages, true ) ) {
-                       $user_locale = get_locale();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $user_locale = '';
+               } elseif ( '' === $user_locale || ! in_array( $user_locale, $languages, true ) ) {
+                       $user_locale = 'site-default';
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                wp_dropdown_languages( array(
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -294,7 +294,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        'id'                          => 'locale',
</span><span class="cx" style="display: block; padding: 0 10px">                        'selected'                    => $user_locale,
</span><span class="cx" style="display: block; padding: 0 10px">                        'languages'                   => $languages,
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'show_available_translations' => false
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'show_available_translations' => false,
+                       'show_site_locale_default'    => true
</ins><span class="cx" style="display: block; padding: 0 10px">                 ) );
</span><span class="cx" style="display: block; padding: 0 10px">                ?>
</span><span class="cx" style="display: block; padding: 0 10px">        </td>
</span></span></pre></div>
<a id="trunksrcwpincludesl10nphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/l10n.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/l10n.php    2016-11-08 22:40:28 UTC (rev 39168)
+++ trunk/src/wp-includes/l10n.php      2016-11-08 23:00:38 UTC (rev 39169)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1048,6 +1048,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 4.0.0
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 4.3.0 Introduced the `echo` argument.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @since 4.7.0 Introduced the `show_site_locale_default` argument.
</ins><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @see get_available_languages()
</span><span class="cx" style="display: block; padding: 0 10px">  * @see wp_get_available_translations()
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1065,6 +1066,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">  *     @type bool|int $echo                         Whether to echo the generated markup. Accepts 0, 1, or their
</span><span class="cx" style="display: block; padding: 0 10px">  *                                                  boolean equivalents. Default 1.
</span><span class="cx" style="display: block; padding: 0 10px">  *     @type bool     $show_available_translations  Whether to show available translations. Default true.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ *     @type bool     $show_site_locale_default     Whether to show an option to fall back to the site's locale. Default false.
</ins><span class="cx" style="display: block; padding: 0 10px">  * }
</span><span class="cx" style="display: block; padding: 0 10px">  * @return string HTML content
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1078,8 +1080,14 @@
</span><span class="cx" style="display: block; padding: 0 10px">                'selected'     => '',
</span><span class="cx" style="display: block; padding: 0 10px">                'echo'         => 1,
</span><span class="cx" style="display: block; padding: 0 10px">                'show_available_translations' => true,
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                'show_site_locale_default'    => false,
</ins><span class="cx" style="display: block; padding: 0 10px">         ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        // English (United States) uses an empty string for the value attribute.
+       if ( 'en_US' === $args['selected'] ) {
+               $args['selected'] = '';
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         $translations = $args['translations'];
</span><span class="cx" style="display: block; padding: 0 10px">        if ( empty( $translations ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                require_once( ABSPATH . 'wp-admin/includes/translation-install.php' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1122,7 +1130,20 @@
</span><span class="cx" style="display: block; padding: 0 10px">        if ( $translations_available ) {
</span><span class="cx" style="display: block; padding: 0 10px">                $structure[] = '<optgroup label="' . esc_attr_x( 'Installed', 'translations' ) . '">';
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $structure[] = '<option value="" lang="en" data-installed="1">English (United States)</option>';
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       if ( $args['show_site_locale_default'] ) {
+               $structure[] = sprintf(
+                       '<option value="site-default" data-installed="1"%s>%s</option>',
+                       selected( 'site-default', $args['selected'], false ),
+                       _x( 'Site Default', 'default site language' )
+               );
+       }
+
+       $structure[] = sprintf(
+               '<option value="" lang="en" data-installed="1"%s>English (United States)</option>',
+               selected( '', $args['selected'], false )
+       );
+
</ins><span class="cx" style="display: block; padding: 0 10px">         foreach ( $languages as $language ) {
</span><span class="cx" style="display: block; padding: 0 10px">                $structure[] = sprintf(
</span><span class="cx" style="display: block; padding: 0 10px">                        '<option value="%s" lang="%s"%s data-installed="1">%s</option>',
</span></span></pre></div>
<a id="trunksrcwpincludesrestapiendpointsclasswprestuserscontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php       2016-11-08 22:40:28 UTC (rev 39168)
+++ trunk/src/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php 2016-11-08 23:00:38 UTC (rev 39169)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1074,7 +1074,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                'locale'    => array(
</span><span class="cx" style="display: block; padding: 0 10px">                                        'description' => __( 'Locale for the resource.' ),
</span><span class="cx" style="display: block; padding: 0 10px">                                        'type'        => 'string',
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        'enum'        => array_merge( array( 'en_US' ), get_available_languages() ),
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 'enum'        => array_merge( array( '', 'en_US' ), get_available_languages() ),
</ins><span class="cx" style="display: block; padding: 0 10px">                                         'context'     => array( 'edit' ),
</span><span class="cx" style="display: block; padding: 0 10px">                                ),
</span><span class="cx" style="display: block; padding: 0 10px">                                'nickname'    => array(
</span></span></pre></div>
<a id="trunktestsphpunittestsl10nphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/l10n.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/l10n.php        2016-11-08 22:40:28 UTC (rev 39168)
+++ trunk/tests/phpunit/tests/l10n.php  2016-11-08 23:00:38 UTC (rev 39169)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -100,6 +100,50 @@
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @ticket 38632
+        */
+       function test_wp_dropdown_languages_site_default() {
+               $args = array(
+                       'id'                       => 'foo',
+                       'name'                     => 'bar',
+                       'languages'                => array( 'de_DE' ),
+                       'translations'             => $this->wp_dropdown_languages_filter(),
+                       'selected'                 => 'de_DE',
+                       'echo'                     => false,
+                       'show_site_locale_default' => true,
+               );
+               $actual = wp_dropdown_languages( $args );
+
+               $this->assertContains( 'id="foo"', $actual );
+               $this->assertContains( 'name="bar"', $actual );
+               $this->assertContains( '<option value="site-default" data-installed="1">Site Default</option>', $actual );
+               $this->assertContains( '<option value="" lang="en" data-installed="1">English (United States)</option>', $actual );
+               $this->assertContains( '<option value="de_DE" lang="de" selected=\'selected\' data-installed="1">Deutsch</option>', $actual );
+               $this->assertContains( '<option value="it_IT" lang="it">Italiano</option>', $actual );
+       }
+
+       /**
+        * @ticket 38632
+        */
+       function test_wp_dropdown_languages_en_US_selected() {
+               $args = array(
+                       'id'           => 'foo',
+                       'name'         => 'bar',
+                       'languages'    => array( 'de_DE' ),
+                       'translations' => $this->wp_dropdown_languages_filter(),
+                       'selected'     => 'en_US',
+                       'echo'         => false,
+               );
+               $actual = wp_dropdown_languages( $args );
+
+               $this->assertContains( 'id="foo"', $actual );
+               $this->assertContains( 'name="bar"', $actual );
+               $this->assertContains( '<option value="" lang="en" data-installed="1" selected=\'selected\'>English (United States)</option>', $actual );
+               $this->assertContains( '<option value="de_DE" lang="de" data-installed="1">Deutsch</option>', $actual );
+               $this->assertContains( '<option value="it_IT" lang="it">Italiano</option>', $actual );
+       }
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * We don't want to call the API when testing.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @return array
</span></span></pre></div>
<a id="trunktestsphpunittestsrestapirestuserscontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/rest-api/rest-users-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/rest-api/rest-users-controller.php      2016-11-08 22:40:28 UTC (rev 39168)
+++ trunk/tests/phpunit/tests/rest-api/rest-users-controller.php        2016-11-08 23:00:38 UTC (rev 39169)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -879,6 +879,25 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( 'en_US', $user->locale );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        /**
+        * @ticket 38632
+        */
+       public function test_update_item_empty_locale() {
+               $user_id = $this->factory->user->create( array( 'user_login' => 'test_json_user', 'user_email' => 'testjson@example.com', 'locale' => 'de_DE' ) );
+               $this->allow_user_to_manage_multisite();
+               wp_set_current_user( self::$user );
+
+               $request = new WP_REST_Request( 'PUT', '/wp/v2/users/' . $user_id );
+               $request->set_param( 'locale', '' );
+               $response = $this->server->dispatch( $request );
+               $this->check_add_edit_user_response( $response, true );
+
+               $data = $response->get_data();
+               $this->assertEquals( get_locale(), $data['locale'] );
+               $user = get_userdata( $user_id );
+               $this->assertEquals( '', $user->locale );
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         public function test_update_item_username_attempt() {
</span><span class="cx" style="display: block; padding: 0 10px">                $user1 = $this->factory->user->create( array( 'user_login' => 'test_json_user', 'user_email' => 'testjson@example.com' ) );
</span><span class="cx" style="display: block; padding: 0 10px">                $user2 = $this->factory->user->create( array( 'user_login' => 'test_json_user2', 'user_email' => 'testjson2@example.com' ) );
</span></span></pre>
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