From beba4bb73a10b97809105b3184da7006fbe25f55 Mon Sep 17 00:00:00 2001
From: Jake Spurlock <whyisjake@git.wordpress.org>
Date: Mon, 27 Jul 2020 18:29:43 +0000
Subject: [PATCH] REST API: Install plugin translations after the plugin
 install. This only installs for the plugin in question, not all plugins.

Support for retrieving the langauge pack alongside the install API request was added in https://meta.trac.wordpress.org/changeset/10091 to avoid having to make a plugin update check during the REST API check.

Fixes #50732.
Props dd32, ocean90, ryelle, swissspidy, tellyworth, whyisjake, TimothyBlynJacobs.


git-svn-id: https://develop.svn.wordpress.org/trunk@48641 602fd350-edb4-49c9-b593-d223f7449a82
---
 .../class-wp-rest-plugins-controller.php      | 29 ++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php
index 28b51d7612..4eca50b549 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php
@@ -285,7 +285,8 @@ class WP_REST_Plugins_Controller extends WP_REST_Controller {
 			array(
 				'slug'   => $slug,
 				'fields' => array(
-					'sections' => false,
+					'sections'       => false,
+					'language_packs' => true,
 				),
 			)
 		);
@@ -355,6 +356,32 @@ class WP_REST_Plugins_Controller extends WP_REST_Controller {
 			}
 		}
 
+		// Install translations.
+		$installed_locales = array_values( get_available_languages() );
+		/** This filter is documented in wp-includes/update.php */
+		$installed_locales = apply_filters( 'plugins_update_check_locales', $installed_locales );
+
+		$language_packs = array_map(
+			function( $item ) {
+				return (object) $item;
+			},
+			$api->language_packs
+		);
+
+		$language_packs = array_filter(
+			$language_packs,
+			function( $pack ) use ( $installed_locales ) {
+				return in_array( $pack->language, $installed_locales, true );
+			}
+		);
+
+		if ( $language_packs ) {
+			$lp_upgrader = new Language_Pack_Upgrader( $skin );
+
+			// Install all applicable language packs for the plugin.
+			$lp_upgrader->bulk_upgrade( $language_packs );
+		}
+
 		$path          = WP_PLUGIN_DIR . '/' . $file;
 		$data          = get_plugin_data( $path, false, false );
 		$data['_file'] = $file;