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   1  <?php
   2  /**
   3   * WordPress Translation Installation Administration API
   4   *
   5   * @package WordPress
   6   * @subpackage Administration
   7   */
   8  
   9  
  10  /**
  11   * Retrieve translations from WordPress Translation API.
  12   *
  13   * @since 4.0.0
  14   *
  15   * @param string       $type Type of translations. Accepts 'plugins', 'themes', 'core'.
  16   * @param array|object $args Translation API arguments. Optional.
  17   * @return array|WP_Error On success an associative array of translations, WP_Error on failure.
  18   */
  19  function translations_api( $type, $args = null ) {
  20      // Include an unmodified $wp_version.
  21      require  ABSPATH . WPINC . '/version.php';
  22  
  23      if ( ! in_array( $type, array( 'plugins', 'themes', 'core' ), true ) ) {
  24          return new WP_Error( 'invalid_type', __( 'Invalid translation type.' ) );
  25      }
  26  
  27      /**
  28       * Allows a plugin to override the WordPress.org Translation Installation API entirely.
  29       *
  30       * @since 4.0.0
  31       *
  32       * @param false|array $result The result array. Default false.
  33       * @param string      $type   The type of translations being requested.
  34       * @param object      $args   Translation API arguments.
  35       */
  36      $res = apply_filters( 'translations_api', false, $type, $args );
  37  
  38      if ( false === $res ) {
  39          $url      = 'http://api.wordpress.org/translations/' . $type . '/1.0/';
  40          $http_url = $url;
  41          $ssl      = wp_http_supports( array( 'ssl' ) );
  42          if ( $ssl ) {
  43              $url = set_url_scheme( $url, 'https' );
  44          }
  45  
  46          $options = array(
  47              'timeout' => 3,
  48              'body'    => array(
  49                  'wp_version' => $wp_version,
  50                  'locale'     => get_locale(),
  51                  'version'    => $args['version'], // Version of plugin, theme or core.
  52              ),
  53          );
  54  
  55          if ( 'core' !== $type ) {
  56              $options['body']['slug'] = $args['slug']; // Plugin or theme slug.
  57          }
  58  
  59          $request = wp_remote_post( $url, $options );
  60  
  61          if ( $ssl && is_wp_error( $request ) ) {
  62              trigger_error(
  63                  sprintf(
  64                      /* translators: %s: Support forums URL. */
  65                      __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
  66                      __( 'https://wordpress.org/support/forums/' )
  67                  ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ),
  68                  headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE
  69              );
  70  
  71              $request = wp_remote_post( $http_url, $options );
  72          }
  73  
  74          if ( is_wp_error( $request ) ) {
  75              $res = new WP_Error(
  76                  'translations_api_failed',
  77                  sprintf(
  78                      /* translators: %s: Support forums URL. */
  79                      __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
  80                      __( 'https://wordpress.org/support/forums/' )
  81                  ),
  82                  $request->get_error_message()
  83              );
  84          } else {
  85              $res = json_decode( wp_remote_retrieve_body( $request ), true );
  86              if ( ! is_object( $res ) && ! is_array( $res ) ) {
  87                  $res = new WP_Error(
  88                      'translations_api_failed',
  89                      sprintf(
  90                          /* translators: %s: Support forums URL. */
  91                          __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
  92                          __( 'https://wordpress.org/support/forums/' )
  93                      ),
  94                      wp_remote_retrieve_body( $request )
  95                  );
  96              }
  97          }
  98      }
  99  
 100      /**
 101       * Filters the Translation Installation API response results.
 102       *
 103       * @since 4.0.0
 104       *
 105       * @param array|WP_Error $res  Response as an associative array or WP_Error.
 106       * @param string         $type The type of translations being requested.
 107       * @param object         $args Translation API arguments.
 108       */
 109      return apply_filters( 'translations_api_result', $res, $type, $args );
 110  }
 111  
 112  /**
 113   * Get available translations from the WordPress.org API.
 114   *
 115   * @since 4.0.0
 116   *
 117   * @see translations_api()
 118   *
 119   * @return array[] Array of translations, each an array of data, keyed by the language. If the API response results
 120   *                 in an error, an empty array will be returned.
 121   */
 122  function wp_get_available_translations() {
 123      if ( ! wp_installing() ) {
 124          $translations = get_site_transient( 'available_translations' );
 125          if ( false !== $translations ) {
 126              return $translations;
 127          }
 128      }
 129  
 130      // Include an unmodified $wp_version.
 131      require  ABSPATH . WPINC . '/version.php';
 132  
 133      $api = translations_api( 'core', array( 'version' => $wp_version ) );
 134  
 135      if ( is_wp_error( $api ) || empty( $api['translations'] ) ) {
 136          return array();
 137      }
 138  
 139      $translations = array();
 140      // Key the array with the language code for now.
 141      foreach ( $api['translations'] as $translation ) {
 142          $translations[ $translation['language'] ] = $translation;
 143      }
 144  
 145      if ( ! defined( 'WP_INSTALLING' ) ) {
 146          set_site_transient( 'available_translations', $translations, 3 * HOUR_IN_SECONDS );
 147      }
 148  
 149      return $translations;
 150  }
 151  
 152  /**
 153   * Output the select form for the language selection on the installation screen.
 154   *
 155   * @since 4.0.0
 156   *
 157   * @global string $wp_local_package Locale code of the package.
 158   *
 159   * @param array[] $languages Array of available languages (populated via the Translation API).
 160   */
 161  function wp_install_language_form( $languages ) {
 162      global $wp_local_package;
 163  
 164      $installed_languages = get_available_languages();
 165  
 166      echo "<label class='screen-reader-text' for='language'>Select a default language</label>\n";
 167      echo "<select size='14' name='language' id='language'>\n";
 168      echo '<option value="" lang="en" selected="selected" data-continue="Continue" data-installed="1">English (United States)</option>';
 169      echo "\n";
 170  
 171      if ( ! empty( $wp_local_package ) && isset( $languages[ $wp_local_package ] ) ) {
 172          if ( isset( $languages[ $wp_local_package ] ) ) {
 173              $language = $languages[ $wp_local_package ];
 174              printf(
 175                  '<option value="%s" lang="%s" data-continue="%s"%s>%s</option>' . "\n",
 176                  esc_attr( $language['language'] ),
 177                  esc_attr( current( $language['iso'] ) ),
 178                  esc_attr( $language['strings']['continue'] ? $language['strings']['continue'] : 'Continue' ),
 179                  in_array( $language['language'], $installed_languages, true ) ? ' data-installed="1"' : '',
 180                  esc_html( $language['native_name'] )
 181              );
 182  
 183              unset( $languages[ $wp_local_package ] );
 184          }
 185      }
 186  
 187      foreach ( $languages as $language ) {
 188          printf(
 189              '<option value="%s" lang="%s" data-continue="%s"%s>%s</option>' . "\n",
 190              esc_attr( $language['language'] ),
 191              esc_attr( current( $language['iso'] ) ),
 192              esc_attr( $language['strings']['continue'] ? $language['strings']['continue'] : 'Continue' ),
 193              in_array( $language['language'], $installed_languages, true ) ? ' data-installed="1"' : '',
 194              esc_html( $language['native_name'] )
 195          );
 196      }
 197      echo "</select>\n";
 198      echo '<p class="step"><span class="spinner"></span><input id="language-continue" type="submit" class="button button-primary button-large" value="Continue" /></p>';
 199  }
 200  
 201  /**
 202   * Download a language pack.
 203   *
 204   * @since 4.0.0
 205   *
 206   * @see wp_get_available_translations()
 207   *
 208   * @param string $download Language code to download.
 209   * @return string|false Returns the language code if successfully downloaded
 210   *                      (or already installed), or false on failure.
 211   */
 212  function wp_download_language_pack( $download ) {
 213      // Check if the translation is already installed.
 214      if ( in_array( $download, get_available_languages(), true ) ) {
 215          return $download;
 216      }
 217  
 218      if ( ! wp_is_file_mod_allowed( 'download_language_pack' ) ) {
 219          return false;
 220      }
 221  
 222      // Confirm the translation is one we can download.
 223      $translations = wp_get_available_translations();
 224      if ( ! $translations ) {
 225          return false;
 226      }
 227      foreach ( $translations as $translation ) {
 228          if ( $translation['language'] === $download ) {
 229              $translation_to_load = true;
 230              break;
 231          }
 232      }
 233  
 234      if ( empty( $translation_to_load ) ) {
 235          return false;
 236      }
 237      $translation = (object) $translation;
 238  
 239      require_once  ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
 240      $skin              = new Automatic_Upgrader_Skin();
 241      $upgrader          = new Language_Pack_Upgrader( $skin );
 242      $translation->type = 'core';
 243      $result            = $upgrader->upgrade( $translation, array( 'clear_update_cache' => false ) );
 244  
 245      if ( ! $result || is_wp_error( $result ) ) {
 246          return false;
 247      }
 248  
 249      return $translation->language;
 250  }
 251  
 252  /**
 253   * Check if WordPress has access to the filesystem without asking for
 254   * credentials.
 255   *
 256   * @since 4.0.0
 257   *
 258   * @return bool Returns true on success, false on failure.
 259   */
 260  function wp_can_install_language_pack() {
 261      if ( ! wp_is_file_mod_allowed( 'can_install_language_pack' ) ) {
 262          return false;
 263      }
 264  
 265      require_once  ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
 266      $skin     = new Automatic_Upgrader_Skin();
 267      $upgrader = new Language_Pack_Upgrader( $skin );
 268      $upgrader->init();
 269  
 270      $check = $upgrader->fs_connect( array( WP_CONTENT_DIR, WP_LANG_DIR ) );
 271  
 272      if ( ! $check || is_wp_error( $check ) ) {
 273          return false;
 274      }
 275  
 276      return true;
 277  }