<?php

/**

 * A simple set of functions to check our version 1.0 update service.

 *

 * @package WordPress

 * @since 2.3.0

 */

/**

 * Check WordPress version against the newest version.

 *

 * The WordPress version, PHP version, and Locale is sent. Checks against the

 * WordPress server at api.wordpress.org server. Will only check if WordPress

 * isn't installing.

 *

 * @package WordPress

 * @since 2.3.0

 * @uses $wp_version Used to check against the newest WordPress version.

 *

 * @param array $extra_stats Extra statistics to report to the WordPress.org API.

 * @return mixed Returns null if update is unsupported. Returns false if check is too soon.

 */

function wp_version_check( $extra_stats = array() ) {

	if ( defined('WP_INSTALLING') )

		return;

	global $wpdb, $wp_local_package;

	include ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version

	$php_version = phpversion();

	$current = get_site_transient( 'update_core' );

	$translations = wp_get_installed_translations( 'core' );

	if ( ! is_object($current) ) {

		$current = new stdClass;

		$current->updates = array();

		$current->version_checked = $wp_version;

	}

	// Wait 60 seconds between multiple version check requests

	$timeout = 60;

	$time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );

	if ( $time_not_changed && empty( $extra_stats ) )

		return false;

	$locale = get_locale();

	/**

	 * Filter the locale requested for WordPress core translations.

	 *

	 * @since 2.8.0

	 *

	 * @param string $locale Current locale.

	 */

	$locale = apply_filters( 'core_version_check_locale', $locale );

	// Update last_checked for current to prevent multiple blocking requests if request hangs

	$current->last_checked = time();

	set_site_transient( 'update_core', $current );

	if ( method_exists( $wpdb, 'db_version' ) )

		$mysql_version = preg_replace('/[^0-9.].*/', '', $wpdb->db_version());

	else

		$mysql_version = 'N/A';

	if ( is_multisite() ) {

		$user_count = get_user_count();

		$num_blogs = get_blog_count();

		$wp_install = network_site_url();

		$multisite_enabled = 1;

	} else {

		$user_count = count_users();

		$user_count = $user_count['total_users'];

		$multisite_enabled = 0;

		$num_blogs = 1;

		$wp_install = home_url( '/' );

	}

	$query = array(

		'version'           => $wp_version,

		'php'               => $php_version,

		'locale'            => $locale,

		'mysql'             => $mysql_version,

		'local_package'     => isset( $wp_local_package ) ? $wp_local_package : '',

		'blogs'             => $num_blogs,

		'users'             => $user_count,

		'multisite_enabled' => $multisite_enabled,

	);

	$post_body = array(

		'translations' => json_encode( $translations ),

	);

	if ( $extra_stats )

		$post_body = array_merge( $post_body, $extra_stats );

	$url = $http_url = 'http://api.wordpress.org/core/version-check/1.7/?' . http_build_query( $query, null, '&' );

	if ( $ssl = wp_http_supports( array( 'ssl' ) ) )

		$url = set_url_scheme( $url, 'https' );

	$options = array(

		'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3 ),

		'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ),

		'headers' => array(

			'wp_install' => $wp_install,

			'wp_blog' => home_url( '/' )

		),

		'body' => $post_body,

	);

	$response = wp_remote_post( $url, $options );

	if ( $ssl && is_wp_error( $response ) ) {

		trigger_error( __( '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="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 );

		$response = wp_remote_post( $http_url, $options );

	}

	if ( is_wp_error( $response ) || 200 != wp_remote_retrieve_response_code( $response ) )

		return false;

	$body = trim( wp_remote_retrieve_body( $response ) );

	$body = json_decode( $body, true );

	if ( ! is_array( $body ) || ! isset( $body['offers'] ) )

		return false;

	$offers = $body['offers'];

	foreach ( $offers as &$offer ) {

		foreach ( $offer as $offer_key => $value ) {

			if ( 'packages' == $offer_key )

				$offer['packages'] = (object) array_intersect_key( array_map( 'esc_url', $offer['packages'] ),

					array_fill_keys( array( 'full', 'no_content', 'new_bundled', 'partial', 'rollback' ), '' ) );

			elseif ( 'download' == $offer_key )

				$offer['download'] = esc_url( $value );

			else

				$offer[ $offer_key ] = esc_html( $value );

		}

		$offer = (object) array_intersect_key( $offer, array_fill_keys( array( 'response', 'download', 'locale',

			'packages', 'current', 'version', 'php_version', 'mysql_version', 'new_bundled', 'partial_version', 'notify_email' ), '' ) );

	}

	$updates = new stdClass();

	$updates->updates = $offers;

	$updates->last_checked = time();

	$updates->version_checked = $wp_version;

	if ( isset( $body['translations'] ) )

		$updates->translations = $body['translations'];

	set_site_transient( 'update_core',  $updates);

}

/**

 * Check plugin versions against the latest versions hosted on WordPress.org.

 *

 * The WordPress version, PHP version, and Locale is sent along with a list of

 * all plugins installed. Checks against the WordPress server at

 * api.wordpress.org. Will only check if WordPress isn't installing.

 *

 * @package WordPress

 * @since 2.3.0

 * @uses $wp_version Used to notify the WordPress version.

 *

 * @return mixed Returns null if update is unsupported. Returns false if check is too soon.

 */

function wp_update_plugins() {

	include ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version

	if ( defined('WP_INSTALLING') )

		return false;

	// If running blog-side, bail unless we've not checked in the last 12 hours

	if ( !function_exists( 'get_plugins' ) )

		require_once( ABSPATH . 'wp-admin/includes/plugin.php' );

	$plugins = get_plugins();

	$translations = wp_get_installed_translations( 'plugins' );

	$active  = get_option( 'active_plugins', array() );

	$current = get_site_transient( 'update_plugins' );

	if ( ! is_object($current) )

		$current = new stdClass;

	$new_option = new stdClass;

	$new_option->last_checked = time();

	// Check for update on a different schedule, depending on the page.

	switch ( current_filter() ) {

		case 'upgrader_process_complete' :

			$timeout = 0;

			break;

		case 'load-update-core.php' :

			$timeout = MINUTE_IN_SECONDS;

			break;

		case 'load-plugins.php' :

		case 'load-update.php' :

			$timeout = HOUR_IN_SECONDS;

			break;

		default :

			$timeout = 12 * HOUR_IN_SECONDS;

	}

	$time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );

	if ( $time_not_changed ) {

		$plugin_changed = false;

		foreach ( $plugins as $file => $p ) {

			$new_option->checked[ $file ] = $p['Version'];

			if ( !isset( $current->checked[ $file ] ) || strval($current->checked[ $file ]) !== strval($p['Version']) )

				$plugin_changed = true;

		}

		if ( isset ( $current->response ) && is_array( $current->response ) ) {

			foreach ( $current->response as $plugin_file => $update_details ) {

				if ( ! isset($plugins[ $plugin_file ]) ) {

					$plugin_changed = true;

					break;

				}

			}

		}

		// Bail if we've checked recently and if nothing has changed

		if ( ! $plugin_changed )

			return false;

	}

	// Update last_checked for current to prevent multiple blocking requests if request hangs

	$current->last_checked = time();

	set_site_transient( 'update_plugins', $current );

	$to_send = compact( 'plugins', 'active' );

	$locales = array( get_locale() );

	/**

	 * Filter the locales requested for plugin translations.

	 *

	 * @since 3.7.0

	 *

	 * @param array $locales Plugin locale. Default is current locale of the site.

	 */

	$locales = apply_filters( 'plugins_update_check_locales', $locales );

	$options = array(

		'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3),

		'body' => array(

			'plugins'      => json_encode( $to_send ),

			'translations' => json_encode( $translations ),

			'locale'       => json_encode( $locales ),

		),

		'user-agent' => 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )

	);

	$url = $http_url = 'http://api.wordpress.org/plugins/update-check/1.1/';

	if ( $ssl = wp_http_supports( array( 'ssl' ) ) )

		$url = set_url_scheme( $url, 'https' );

	$raw_response = wp_remote_post( $url, $options );

	if ( $ssl && is_wp_error( $raw_response ) ) {

		trigger_error( __( '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="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 );

		$raw_response = wp_remote_post( $http_url, $options );

	}

	if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) )

		return false;

	$response = json_decode( wp_remote_retrieve_body( $raw_response ), true );

	foreach ( $response['plugins'] as &$plugin ) {

		$plugin = (object) $plugin;

	}

	unset( $plugin );

	if ( is_array( $response ) ) {

		$new_option->response = $response['plugins'];

		$new_option->translations = $response['translations'];

	} else {

		$new_option->response = array();

		$new_option->translations = array();

	}

	set_site_transient( 'update_plugins', $new_option );

}

/**

 * Check theme versions against the latest versions hosted on WordPress.org.

 *

 * A list of all themes installed in sent to WP. Checks against the

 * WordPress server at api.wordpress.org. Will only check if WordPress isn't

 * installing.

 *

 * @package WordPress

 * @since 2.7.0

 * @uses $wp_version Used to notify the WordPress version.

 *

 * @return mixed Returns null if update is unsupported. Returns false if check is too soon.

 */

function wp_update_themes() {

	include ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version

	if ( defined( 'WP_INSTALLING' ) )

		return false;

	$installed_themes = wp_get_themes();

	$translations = wp_get_installed_translations( 'themes' );

	$last_update = get_site_transient( 'update_themes' );

	if ( ! is_object($last_update) )

		$last_update = new stdClass;

	$themes = $checked = $request = array();

	// Put slug of current theme into request.

	$request['active'] = get_option( 'stylesheet' );

	foreach ( $installed_themes as $theme ) {

		$checked[ $theme->get_stylesheet() ] = $theme->get('Version');

		$themes[ $theme->get_stylesheet() ] = array(

			'Name'       => $theme->get('Name'),

			'Title'      => $theme->get('Name'),

			'Version'    => $theme->get('Version'),

			'Author'     => $theme->get('Author'),

			'Author URI' => $theme->get('AuthorURI'),

			'Template'   => $theme->get_template(),

			'Stylesheet' => $theme->get_stylesheet(),

		);

	}

	// Check for update on a different schedule, depending on the page.

	switch ( current_filter() ) {

		case 'upgrader_process_complete' :

			$timeout = 0;

			break;

		case 'load-update-core.php' :

			$timeout = MINUTE_IN_SECONDS;

			break;

		case 'load-themes.php' :

		case 'load-update.php' :

			$timeout = HOUR_IN_SECONDS;

			break;

		default :

			$timeout = 12 * HOUR_IN_SECONDS;

	}

	$time_not_changed = isset( $last_update->last_checked ) && $timeout > ( time() - $last_update->last_checked );

	if ( $time_not_changed ) {

		$theme_changed = false;

		foreach ( $checked as $slug => $v ) {

			if ( !isset( $last_update->checked[ $slug ] ) || strval($last_update->checked[ $slug ]) !== strval($v) )

				$theme_changed = true;

		}

		if ( isset ( $last_update->response ) && is_array( $last_update->response ) ) {

			foreach ( $last_update->response as $slug => $update_details ) {

				if ( ! isset($checked[ $slug ]) ) {

					$theme_changed = true;

					break;

				}

			}

		}

		// Bail if we've checked recently and if nothing has changed

		if ( ! $theme_changed )

			return false;

	}

	// Update last_checked for current to prevent multiple blocking requests if request hangs

	$last_update->last_checked = time();

	set_site_transient( 'update_themes', $last_update );

	$request['themes'] = $themes;

	$locales = array( get_locale() );

	/**

	 * Filter the locales requested for theme translations.

	 *

	 * @since 3.7.0

	 *

	 * @param array $locales Theme locale. Default is current locale of the site.

	 */

	$locales = apply_filters( 'themes_update_check_locales', $locales );

	$options = array(

		'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3),

		'body' => array(

			'themes'       => json_encode( $request ),

			'translations' => json_encode( $translations ),

			'locale'       => json_encode( $locales ),

		),

		'user-agent'	=> 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )

	);

	$url = $http_url = 'http://api.wordpress.org/themes/update-check/1.1/';

	if ( $ssl = wp_http_supports( array( 'ssl' ) ) )

		$url = set_url_scheme( $url, 'https' );

	$raw_response = wp_remote_post( $url, $options );

	if ( $ssl && is_wp_error( $raw_response ) ) {

		trigger_error( __( '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="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 );

		$raw_response = wp_remote_post( $http_url, $options );

	}

	if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) )

		return false;

	$new_update = new stdClass;

	$new_update->last_checked = time();

	$new_update->checked = $checked;

	$response = json_decode( wp_remote_retrieve_body( $raw_response ), true );