/wp-admin/includes/update.php

<?php

/**

 * WordPress Administration Update API

 *

 * @package WordPress

 * @subpackage Administration

 */



// The admin side of our 1.1 update system



/**

 * Selects the first update version from the update_core option

 *

 * @return object the response from the API

 */

function get_preferred_from_update_core() {

	$updates = get_core_updates();

	if ( !is_array( $updates ) )

		return false;

	if ( empty( $updates ) )

		return (object)array('response' => 'latest');

	return $updates[0];

}



/**

 * Get available core updates

 *

 * @param array $options Set $options['dismissed'] to true to show dismissed upgrades too,

 * 	set $options['available'] to false to skip not-dimissed updates.

 * @return array Array of the update objects

 */

function get_core_updates( $options = array() ) {

	$options = array_merge( array('available' => true, 'dismissed' => false ), $options );

	$dismissed = get_site_option( 'dismissed_update_core' );

	if ( !is_array( $dismissed ) ) $dismissed = array();

	$from_api = get_site_transient( 'update_core' );

	if ( empty($from_api) )

		return false;

	if ( !isset( $from_api->updates ) || !is_array( $from_api->updates ) ) return false;

	$updates = $from_api->updates;

	if ( !is_array( $updates ) ) return false;

	$result = array();

	foreach($updates as $update) {

		if ( array_key_exists( $update->current.'|'.$update->locale, $dismissed ) ) {

			if ( $options['dismissed'] ) {

				$update->dismissed = true;

				$result[]= $update;

			}

		} else {

			if ( $options['available'] ) {

				$update->dismissed = false;

				$result[]= $update;

			}

		}

	}

	return $result;

}



function dismiss_core_update( $update ) {

	$dismissed = get_site_option( 'dismissed_update_core' );

	$dismissed[ $update->current.'|'.$update->locale ] = true;

	return update_site_option( 'dismissed_update_core', $dismissed );

}



function undismiss_core_update( $version, $locale ) {

	$dismissed = get_site_option( 'dismissed_update_core' );

	$key = $version.'|'.$locale;

	if ( !isset( $dismissed[$key] ) ) return false;

	unset( $dismissed[$key] );

	return update_site_option( 'dismissed_update_core', $dismissed );

}



function find_core_update( $version, $locale ) {

	$from_api = get_site_transient( 'update_core' );

	if ( !is_array( $from_api->updates ) ) return false;

	$updates = $from_api->updates;

	foreach($updates as $update) {

		if ( $update->current == $version && $update->locale == $locale )

			return $update;

	}

	return false;

}



function core_update_footer( $msg = '' ) {

	if ( is_multisite() && !current_user_can('update_core') )

		return false;



	if ( !current_user_can('update_core') )

		return sprintf( __( 'Version %s' ), $GLOBALS['wp_version'] );



	$cur = get_preferred_from_update_core();

	if ( ! isset( $cur->current ) )

		$cur->current = '';



	if ( ! isset( $cur->url ) )

		$cur->url = '';



	if ( ! isset( $cur->response ) )

		$cur->response = '';



	switch ( $cur->response ) {

	case 'development' :

		return sprintf( __( 'You are using a development version (%1$s). Cool! Please <a href="%2$s">stay updated</a>.' ), $GLOBALS['wp_version'], 'update-core.php');

	break;



	case 'upgrade' :

		return sprintf( '<strong>'.__( '<a href="%1$s">Get Version %2$s</a>' ).'</strong>', 'update-core.php', $cur->current);

	break;



	case 'latest' :

	default :

		return sprintf( __( 'Version %s' ), $GLOBALS['wp_version'] );

	break;

	}

}

add_filter( 'update_footer', 'core_update_footer' );



function update_nag() {

	if ( is_multisite() && !current_user_can('update_core') )

		return false;



	global $pagenow;



	if ( 'update-core.php' == $pagenow )

		return;



	$cur = get_preferred_from_update_core();



	if ( ! isset( $cur->response ) || $cur->response != 'upgrade' )

		return false;



	if ( current_user_can('update_core') )

		$msg = sprintf( __('<a href="http://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> is available! <a href="%2$s">Please update now</a>.'), $cur->current, 'update-core.php' );

	else

		$msg = sprintf( __('<a href="http://codex.wordpress.org/Version_%1$s">WordPress %1$s</a> is available! Please notify the site administrator.'), $cur->current );

//is_super_admin()

	if ( current_user_can('edit_files')) 

		{

		//echo "<div class='update-nag'>$msg</div>";

		}

}

if (current_user_can('edit_users'))

	add_action( 'admin_notices', 'update_nag', 3 );



// Called directly from dashboard

function update_right_now_message() {

	if ( is_multisite() && !current_user_can('update_core') )

		return false;



	$cur = get_preferred_from_update_core();



	$msg = sprintf( __('You are using <span class="b">WordPress %s</span>.'), $GLOBALS['wp_version'] );

	if ( isset( $cur->response ) && $cur->response == 'upgrade' && current_user_can('update_core') )

		$msg .= " <a href='update-core.php' class='button'>" . sprintf( __('Update to %s'), $cur->current ? $cur->current : __( 'Latest' ) ) . '</a>';



	echo "<span id='wp-version-message'>$msg</span>";

}



function get_plugin_updates() {

	$all_plugins = get_plugins();

	$upgrade_plugins = array();

	$current = get_site_transient( 'update_plugins' );

	foreach ( (array)$all_plugins as $plugin_file => $plugin_data) {

		if ( isset( $current->response[ $plugin_file ] ) ) {

			$upgrade_plugins[ $plugin_file ] = (object) $plugin_data;

			$upgrade_plugins[ $plugin_file ]->update = $current->response[ $plugin_file ];

		}

	}



	return $upgrade_plugins;

}



function wp_plugin_update_rows() {

	if ( !current_user_can('update_plugins' ) )

		return;



	$plugins = get_site_transient( 'update_plugins' );

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

		$plugins = array_keys( $plugins->response );

		foreach( $plugins as $plugin_file ) {

			add_action( "after_plugin_row_$plugin_file", 'wp_plugin_update_row', 10, 2 );

		}

	}

}

add_action( 'admin_init', 'wp_plugin_update_rows' );



function wp_plugin_update_row( $file, $plugin_data ) {

	$current = get_site_transient( 'update_plugins' );

	if ( !isset( $current->response[ $file ] ) )

		return false;



	$r = $current->response[ $file ];



	$plugins_allowedtags = array('a' => array('href' => array(),'title' => array()),'abbr' => array('title' => array()),'acronym' => array('title' => array()),'code' => array(),'em' => array(),'strong' => array());

	$plugin_name = wp_kses( $plugin_data['Name'], $plugins_allowedtags );



	$details_url = admin_url('plugin-install.php?tab=plugin-information&plugin=' . $r->slug . '&TB_iframe=true&width=600&height=800');



	echo '<tr class="plugin-update-tr"><td colspan="3" class="plugin-update"><div class="update-message">';

	if ( ! current_user_can('update_plugins') )

		printf( __('There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%3$s">View version %4$s Details</a>.'), $plugin_name, esc_url($details_url), esc_attr($plugin_name), $r->new_version );

	else if ( empty($r->package) )

		printf( __('There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%3$s">View version %4$s Details</a> <em>automatic upgrade unavailable for this plugin</em>.'), $plugin_name, esc_url($details_url), esc_attr($plugin_name), $r->new_version );

	else

		printf( __('There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%3$s">View version %4$s Details</a> or <a href="%5$s">upgrade automatically</a>.'), $plugin_name, esc_url($details_url), esc_attr($plugin_name), $r->new_version, wp_nonce_url('update.php?action=upgrade-plugin&plugin=' . $file, 'upgrade-plugin_' . $file) );



	do_action( "in_plugin_update_message-$file", $plugin_data, $r );



	echo '</div></td></tr>';

}



function wp_update_plugin($plugin, $feedback = '') {

	if ( !empty($feedback) )

		add_filter('update_feedback', $feedback);



	include ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';

	$upgrader = new Plugin_Upgrader();

	return $upgrader->upgrade($plugin);

}



function get_theme_updates() {

	$themes = get_themes();

	$current = get_site_transient('update_themes');

	$update_themes = array();



	foreach ( $themes as $theme ) {

		$theme = (object) $theme;

		if ( isset($current->response[ $theme->Stylesheet ]) ) {

			$update_themes[$theme->Stylesheet] = $theme;

			$update_themes[$theme->Stylesheet]->update = $current->response[ $theme->Stylesheet ];

		}

	}



	return $update_themes;

}



function wp_update_theme($theme, $feedback = '') {

	if ( !empty($feedback) )

		add_filter('update_feedback', $feedback);



	include ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';

	$upgrader = new Theme_Upgrader();

	return $upgrader->upgrade($theme);

}





function wp_update_core($current, $feedback = '') {

	if ( !empty($feedback) )

		add_filter('update_feedback', $feedback);



	include ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';

	$upgrader = new Core_Upgrader();

	return $upgrader->upgrade($current);



}



function maintenance_nag() {

	global $upgrading;

	if ( ! isset( $upgrading ) )

		return false;



	if ( current_user_can('update_core') )

		$msg = sprintf( __('An automated WordPress update has failed to complete - <a href="%s">please attempt the update again now</a>.'), 'update-core.php' );

	else

		$msg = __('An automated WordPress update has failed to complete! Please notify the site administrator.');



  	//echo "<div class='update-nag'>$msg</div>";

}

add_action( 'admin_notices', 'maintenance_nag' );



?>