+/**
+ * Retrieve theme installer pages from WordPress Themes API.
+ *
+ * It is possible for a theme to override the Themes API result with three
+ * filters. Assume this is for themes, which can extend on the Theme Info to
+ * offer more choices. This is very powerful and must be used with care, when
+ * overridding the filters.
+ *
+ * The first filter, 'themes_api_args', is for the args and gives the action as
+ * the second parameter. The hook for 'themes_api_args' must ensure that an
+ * object is returned.
+ *
+ * The second filter, 'themes_api', is the result that would be returned.
+ *
+ * @since 2.8.0
+ *
+ * @param string $action The requested action. Likely values are 'theme_information',
+ * 'feature_list', or 'query_themes'.
+ * @param array|object $args Optional. Arguments to serialize for the Theme Info API.
+ * @return mixed
+ */
+function themes_api( $action, $args = null ) {
+
+ if ( is_array($args) )
+ $args = (object)$args;
+
+ if ( !isset($args->per_page) )
+ $args->per_page = 24;
+ /**
+ * Filter arguments used to query for installer pages from the WordPress.org Themes API.
+ *
+ * Important: An object MUST be returned to this filter.
+ *
+ * @since 2.8.0
+ *
+ * @param object $args Arguments used to query for installer pages from the WordPress.org Themes API.
+ * @param string $action Requested action. Likely values are 'theme_information',
+ * 'feature_list', or 'query_themes'.
+ */
+ $args = apply_filters( 'themes_api_args', $args, $action );
+
+ /**
+ * Filter whether to override the WordPress.org Themes API.
+ *
+ * Returning a value of true to this filter allows a theme to completely
+ * override the built-in WordPress.org API.
+ *
+ * @since 2.8.0
+ *
+ * @param bool $bool Whether to override the WordPress.org Themes API. Default false.
+ * @param string $action Requested action. Likely values are 'theme_information',
+ * 'feature_list', or 'query_themes'.
+ * @param object $args Arguments used to query for installer pages from the Themes API.
+ */
+ $res = apply_filters( 'themes_api', false, $action, $args );
+
+ if ( ! $res ) {
+ $url = $http_url = 'http://api.wordpress.org/themes/info/1.0/';
+ if ( $ssl = wp_http_supports( array( 'ssl' ) ) )
+ $url = set_url_scheme( $url, 'https' );
+
+ $args = array(
+ 'body' => array(
+ 'action' => $action,
+ 'request' => serialize( $args )
+ )
+ );
+ $request = wp_remote_post( $url, $args );
+
+ if ( $ssl && is_wp_error( $request ) ) {
+ trigger_error( __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ) . ' ' . '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)', headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE );
+ $request = wp_remote_post( $http_url, $args );
+ }
+
+ if ( is_wp_error($request) ) {
+ $res = new WP_Error('themes_api_failed', __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ), $request->get_error_message() );
+ } else {
+ $res = maybe_unserialize( wp_remote_retrieve_body( $request ) );
+ if ( ! is_object( $res ) && ! is_array( $res ) )
+ $res = new WP_Error('themes_api_failed', __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ), wp_remote_retrieve_body( $request ) );
+ }
+ }
+
+ /**
+ * Filter the returned WordPress.org Themes API response.
+ *
+ * @since 2.8.0
+ *
+ * @param array|object $res WordPress.org Themes API response.
+ * @param string $action Requested action. Likely values are 'theme_information',
+ * 'feature_list', or 'query_themes'.
+ * @param object $args Arguments used to query for installer pages from the WordPress.org Themes API.
+ */
+ return apply_filters( 'themes_api_result', $res, $action, $args );
+}
+
+/**
+ * Prepare themes for JavaScript.
+ *
+ * @since 3.8.0
+ *
+ * @param array $themes Optional. Array of WP_Theme objects to prepare.
+ * Defaults to all allowed themes.
+ *
+ * @return array An associative array of theme data, sorted by name.
+ */
+function wp_prepare_themes_for_js( $themes = null ) {
+ $current_theme = get_stylesheet();
+
+ // Make sure the current theme is listed first.
+ $prepared_themes = array( $current_theme => array() );
+
+ if ( null === $themes ) {
+ $themes = wp_get_themes( array( 'allowed' => true ) );
+ if ( ! isset( $themes[ $current_theme ] ) ) {
+ $themes[ $current_theme ] = wp_get_theme();
+ }
+ }
+
+ $updates = array();
+ if ( current_user_can( 'update_themes' ) ) {
+ $updates_transient = get_site_transient( 'update_themes' );
+ if ( isset( $updates_transient->response ) ) {
+ $updates = $updates_transient->response;
+ }
+ }
+
+ WP_Theme::sort_by_name( $themes );
+ foreach ( $themes as $theme ) {
+ $parent = false;
+ if ( $theme->parent() ) {
+ $parent = $theme->parent()->display( 'Name' );
+ }
+
+ $slug = $theme->get_stylesheet();
+ $encoded_slug = urlencode( $slug );
+
+ $prepared_themes[ $slug ] = array(
+ 'id' => $slug,
+ 'name' => $theme->display( 'Name' ),
+ 'screenshot' => array( $theme->get_screenshot() ), // @todo multiple
+ 'description' => $theme->display( 'Description' ),
+ 'author' => $theme->display( 'Author', false, true ),
+ 'authorAndUri' => $theme->display( 'Author' ),
+ 'version' => $theme->display( 'Version' ),
+ 'tags' => $theme->display( 'Tags' ),
+ 'parent' => $parent,
+ 'active' => $slug === $current_theme,
+ 'hasUpdate' => isset( $updates[ $slug ] ),
+ 'update' => get_theme_update_available( $theme ),
+ 'actions' => array(
+ 'activate' => current_user_can( 'switch_themes' ) ? wp_nonce_url( admin_url( 'themes.php?action=activate&stylesheet=' . $encoded_slug ), 'switch-theme_' . $slug ) : null,
+ 'customize'=> current_user_can( 'edit_theme_options' ) ? wp_customize_url( $slug ) : null,
+ 'preview' => add_query_arg( array(
+ 'preview' => 1,
+ 'template' => urlencode( $theme->get_template() ),
+ 'stylesheet' => urlencode( $slug ),
+ 'preview_iframe' => true,
+ 'TB_iframe' => true,
+ ), home_url( '/' ) ),
+ 'delete' => current_user_can( 'delete_themes' ) ? wp_nonce_url( admin_url( 'themes.php?action=delete&stylesheet=' . $encoded_slug ), 'delete-theme_' . $slug ) : null,
+ ),
+ );
+ }
+
+ /**
+ * Filter the themes prepared for JavaScript, for themes.php.
+ *
+ * Could be useful for changing the order, which is by name by default.
+ *
+ * @since 3.8.0
+ *
+ * @param array $prepared_themes Array of themes.
+ */
+ $prepared_themes = apply_filters( 'wp_prepare_themes_for_js', $prepared_themes );
+ return array_values( $prepared_themes );
+}
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