Allow a language to be chosen before installing WordPress. First pass.

* Checks WordPress.org for available languages.
* In get_locale(), starts using the WPLANG option that has existed in multisite since the MU days.
* Adds new argument to wp_install() for setting WPLANG.

see #28577. 


git-svn-id: https://develop.svn.wordpress.org/trunk@28774 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/install.css

@@ -311,3 +311,38 @@ body.rtl,
 	}
 
 }
+
+.language-chooser select {
+	margin: 1px;
+	padding: 8px;
+	width: 100%;
+	display: block;
+	border: 1px solid #ddd;
+	-webkit-border-radius: 0;
+	border-radius: 0; /* Reset mobile webkit's default element styling */
+	-webkit-transition: .05s border-color ease-in-out;
+	transition: .05s border-color ease-in-out;
+	outline: 0;
+	-webkit-box-shadow: inset 0 1px 2px rgba(0,0,0,0.07);
+	box-shadow: inset 0 1px 2px rgba(0,0,0,0.07);
+	background-color: #fff;
+	color: #333;
+	font-size: 16px;
+	font-family: inherit;
+	font-weight: inherit;
+}
+
+.language-chooser select:focus {
+	border-color: #5b9dd9;
+	-webkit-box-shadow: 0 0 2px rgba(30,140,190,0.8);
+	box-shadow: 0 0 2px rgba(30,140,190,0.8);
+}
+
+.wp-core-ui .language-chooser .button.button-hero {
+	font-size: 30px;
+	line-height: 30px;
+}
+
+.language-chooser p {
+	text-align: right;
+}

src/wp-admin/includes/upgrade.php

@@ -32,9 +32,10 @@ if ( !function_exists('wp_install') ) :
  * @param bool $public Whether blog is public.
  * @param null $deprecated Optional. Not used.
  * @param string $user_password Optional. User's chosen password. Will default to a random password.
+ * @param string $language Optional. Language chosen.
  * @return array Array keys 'url', 'user_id', 'password', 'password_message'.
  */
-function wp_install( $blog_title, $user_name, $user_email, $public, $deprecated = '', $user_password = '' ) {
+function wp_install( $blog_title, $user_name, $user_email, $public, $deprecated = '', $user_password = '', $language = '' ) {
 	if ( !empty( $deprecated ) )
 		_deprecated_argument( __FUNCTION__, '2.6' );
 
@@ -48,6 +49,10 @@ function wp_install( $blog_title, $user_name, $user_email, $public, $deprecated
 	update_option('admin_email', $user_email);
 	update_option('blog_public', $public);
 
+	if ( $language ) {
+		update_option( 'WPLANG', $language );
+	}
+
 	$guessurl = wp_guess_url();
 
 	update_option('siteurl', $guessurl);

src/wp-admin/install.php

@@ -43,6 +43,28 @@ require_once( ABSPATH . 'wp-includes/wp-db.php' );
 
 $step = isset( $_GET['step'] ) ? (int) $_GET['step'] : 0;
 
+/**
+ * @todo rename, move
+ */
+function wp_get_available_translations() {
+	$url = 'http://api.wordpress.org/translations/core/1.0/';
+	if ( wp_http_supports( array( 'ssl' ) ) ) {
+		$url = set_url_scheme( $url, 'https' );
+	}
+
+	$options = array(
+		'timeout' => 3,
+		'body' => array( 'version' => $GLOBALS['wp_version'] ),
+	);
+
+	$response = wp_remote_post( $url, $options );
+	$body = wp_remote_retrieve_body( $response );
+	if ( $body && $body = json_decode( $body, true ) ) {
+		return $body;
+	}
+	return false;
+}
+
 /**
  * Display install header.
  *
@@ -136,6 +158,7 @@ function display_setup_form( $error = null ) {
 		</tr>
 	</table>
 	<p class="step"><input type="submit" name="Submit" value="<?php esc_attr_e( 'Install WordPress' ); ?>" class="button button-large" /></p>
+	<input type="hidden" name="language" value="<?php echo isset( $_POST['language'] ) ? esc_attr( $_POST['language'] ) : ''; ?>" />
 </form>
 <?php
 } // end display_setup_form()
@@ -169,9 +192,51 @@ if ( ! is_string( $wpdb->base_prefix ) || '' === $wpdb->base_prefix ) {
 }
 
 switch($step) {
-	case 0: // Step 1
+	case 0: // Step 0
-	case 1: // Step 1, direct link.
+		if ( $body = wp_get_available_translations() ) {
-	  display_header();
+			display_header();
+
+			echo '<form id="setup" method="post" action="install.php?step=1">';
+			echo '<div class="language-chooser">';
+			echo '<select name="language" id="language-chooser" size="15">';
+			echo '<option selected="selected" value="">English (United States)</option>';
+			foreach ( $body['languages'] as $language ) {
+				echo '<option value="' . esc_attr( $language['language'] ) . '">' . esc_html( $language['native_name'] ) . "</option>\n";
+			}
+			echo "</select>\n";
+			echo '<p class="step"><input type="submit" class="button button-primary button-hero" value="&raquo;" /></p>';
+			echo '</div>';
+			echo '</form>';
+			break;
+		}
+		// Deliberately fall through if we can't reach the translations API.
+
+	case 1: // Step 1, direct link or from language chooser.
+		if ( ! empty( $_POST['language'] ) ) {
+			$body = wp_get_available_translations();
+			foreach ( $body['languages'] as $language ) {
+				if ( $language['language'] === $_POST['language'] ) {
+					$loading_language = $_POST['language'];
+					break;
+				}
+			}
+			if ( ! empty( $loading_language ) ) {
+				require ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
+				$skin = new Automatic_Upgrader_Skin;
+				$upgrader = new Language_Pack_Upgrader( $skin );
+				$options = array( 'clear_update_cache' => false );
+				$language['type'] = 'core';
+				$language = (object) $language;
+				/**
+				 * @todo failures (such as non-direct FS)
+				 */
+				$upgrader->upgrade( $language, array( 'clear_update_cache' => false ) );
+				load_textdomain( 'default', WP_LANG_DIR . "/{$loading_language}.mo" );
+				load_textdomain( 'default', WP_LANG_DIR . "/admin-{$loading_language}.mo" );
+			}
+		}
+
+		display_header();
 ?>
 <h1><?php _ex( 'Welcome', 'Howdy' ); ?></h1>
 <p><?php printf( __( 'Welcome to the famous five minute WordPress installation process! You may want to browse the <a href="%s">ReadMe documentation</a> at your leisure. Otherwise, just fill in the information below and you&#8217;ll be on your way to using the most extendable and powerful personal publishing platform in the world.' ), '../readme.html' ); ?></p>
@@ -183,6 +248,16 @@ switch($step) {
 		display_setup_form();
 		break;
 	case 2:
+		$loading_language = '';
+		if ( ! empty( $_POST['language'] ) ) {
+			$available_languages = get_available_languages();
+			if ( isset( $available_languages[ $_POST['language'] ] ) ) {
+				$loading_language = $_POST['language'];
+				load_textdomain( 'default', WP_LANG_DIR . "/{$loading_language}.mo" );
+				load_textdomain( 'default', WP_LANG_DIR . "/admin-{$loading_language}.mo" );
+			}
+		}
+
 		if ( ! empty( $wpdb->error ) )
 			wp_die( $wpdb->error->get_error_message() );
 
@@ -219,7 +294,7 @@ switch($step) {
 
 		if ( $error === false ) {
 			$wpdb->show_errors();
-			$result = wp_install( $weblog_title, $user_name, $admin_email, $public, '', wp_slash( $admin_password ) );
+			$result = wp_install( $weblog_title, $user_name, $admin_email, $public, '', wp_slash( $admin_password ), $loading_language );
 ?>
 
 <h1><?php _e( 'Success!' ); ?></h1>
@@ -250,7 +325,7 @@ switch($step) {
 }
 if ( !wp_is_mobile() ) {
 ?>
-<script type="text/javascript">var t = document.getElementById('weblog_title'); if (t){ t.focus(); }</script>
+<script type="text/javascript">var t = document.getElementById('weblog_title') || document.getElementById('language-chooser'); if (t){ t.focus(); }</script>
 <?php } ?>
 <?php wp_print_scripts( 'user-profile' ); ?>
 </body>

src/wp-includes/l10n.php

@@ -26,7 +26,7 @@
 function get_locale() {
 	global $locale;
 
-	if ( isset( $locale ) )
+	if ( isset( $locale ) ) {
 		/**
 		 * Filter WordPress install's locale ID.
 		 *
@@ -35,6 +35,7 @@ function get_locale() {
 		 * @param string $locale The locale ID.
 		 */
 		return apply_filters( 'locale', $locale );
+	}
 
 	// WPLANG is defined in wp-config.
 	if ( defined( 'WPLANG' ) )
@@ -48,6 +49,11 @@ function get_locale() {
 
 		if ( $ms_locale !== false )
 			$locale = $ms_locale;
+	} elseif ( ! defined( 'WP_INSTALLING' ) ) {
+		$db_locale = get_option( 'WPLANG' );
+		if ( $db_locale ) {
+			$locale = $db_locale;
+		}
 	}
 
 	if ( empty( $locale ) )