Changeset 5570 for sites/trunk/wordpress.org/public_html/wp-content/plugins/plugin-directory/class-template.php

Timestamp:

06/15/2017 12:57:31 PM (8 years ago)

Author:

Otto42

Message:

Plugin Directory: Move hreflang from the theme into the plugin-directory plugin, change it to only show translated languages instead of all languages, in order to make google behave better. Props @joostdevalk, @otto42. Fixes #2870

File:

• sites/trunk/wordpress.org/public_html/wp-content/plugins/plugin-directory/class-template.php (modified) (1 diff)

sites/trunk/wordpress.org/public_html/wp-content/plugins/plugin-directory/class-template.php

@@ -630 +630 @@
         ), home_url( 'wp-json/plugins/v1/plugin/' . $post->post_name . '/favorite' ) );
     }
+
+    /**
+     * Adds hreflang link attributes to WordPress.org pages.
+     *
+     * @link https://support.google.com/webmasters/answer/189077?hl=en Use hreflang for language and regional URLs.
+     * @link https://sites.google.com/site/webmasterhelpforum/en/faq-internationalisation FAQ: Internationalisation.
+     */
+    public function hreflang_link_attributes() {
+        global $wpdb;
+
+        wp_cache_add_global_groups( array( 'locale-associations' ) );
+
+        if ( false === ( $sites = wp_cache_get( 'local-sites', 'locale-associations' ) ) ) {
+
+            // get subdomain/locale associations
+            $subdomains = $wpdb->get_results( 'SELECT locale, subdomain FROM locales', OBJECT_K ); 
+
+            $sites = Plugin_I18n::instance()->get_locales();
+
+            require_once GLOTPRESS_LOCALES_PATH;
+
+            foreach ( $sites as $key => $site ) {
+                $gp_locale = \GP_Locales::by_field( 'wp_locale', $site->wp_locale );
+                if ( empty( $gp_locale ) ) {
+                    unset( $sites[ $key ] );
+                    continue;
+                }
+
+                $sites[ $key ]->subdomain = $subdomains[ $site->wp_locale ]->subdomain;
+
+                // Note that Google only supports ISO 639-1 codes.
+                if ( isset( $gp_locale->lang_code_iso_639_1 ) && isset( $gp_locale->country_code ) ) {
+                    $hreflang = $gp_locale->lang_code_iso_639_1 . '-' . $gp_locale->country_code;
+                } elseif ( isset( $gp_locale->lang_code_iso_639_1 ) ) {
+                    $hreflang = $gp_locale->lang_code_iso_639_1;
+                } elseif ( isset( $gp_locale->lang_code_iso_639_2 ) ) {
+                    $hreflang = $gp_locale->lang_code_iso_639_2;
+                } elseif ( isset( $gp_locale->lang_code_iso_639_3 ) ) {
+                    $hreflang = $gp_locale->lang_code_iso_639_3;
+                }
+
+                if ( $hreflang ) {
+                    $sites[ $key ]->hreflang = strtolower( $hreflang );
+                } else {
+                    unset( $sites[ $key ] );
+                }
+            }
+
+            // Add en_US to the list of sites.
+            $sites['en_US'] = (object) array(
+                'locale'    => 'en_US',
+                'hreflang'  => 'en',
+                'subdomain' => ''
+            );
+
+            uasort( $sites, function( $a, $b ) {
+                return strcasecmp( $a->hreflang, $b->hreflang );
+            } );
+
+
+            wp_cache_set( 'local-sites', $sites, 'locale-associations' );
+        }
+
+        foreach ( $sites as $site ) {
+            $url = sprintf(
+                'https://%swordpress.org%s',
+                $site->subdomain ? "{$site->subdomain}." : '',
+                $_SERVER[ 'REQUEST_URI' ]
+            );
+
+            printf(
+                '<link rel="alternate" href="%s" hreflang="%s" />' . "\n",
+                esc_url( $url ),
+                esc_attr( $site->hreflang )
+            );
+        }
+    }
 }