<?php
/**
 * @package Admin
 */

/**
 * Function used from AJAX calls, takes it variables from $_POST, dies on exit.
 */
function wpseo_set_option() {
	if ( !current_user_can( 'manage_options' ) )
		die( '-1' );
	check_ajax_referer( 'wpseo-setoption' );

	$option = $_POST[ 'option' ];
	if ( $option != 'page_comments' )
		die( '-1' );

	update_option( $option, 0 );
	die( '1' );
}

add_action( 'wp_ajax_wpseo_set_option', 'wpseo_set_option' );

/**
 * Function used to remove the admin notices for several purposes, dies on exit.
 */
function wpseo_set_ignore() {
	if ( !current_user_can( 'manage_options' ) )
		die( '-1' );
	check_ajax_referer( 'wpseo-ignore' );

	$options                                   = get_option( 'wpseo' );
	$options[ 'ignore_' . $_POST[ 'option' ] ] = 'ignore';
	update_option( 'wpseo', $options );
	die( '1' );
}

add_action( 'wp_ajax_wpseo_set_ignore', 'wpseo_set_ignore' );

/**
 * Function used to remove the admin notices for several purposes, dies on exit.
 */
function wpseo_kill_blocking_files() {
	if ( !current_user_can( 'manage_options' ) )
		die( '-1' );
	check_ajax_referer( 'wpseo-blocking-files' );

	$message = 'There were no files to delete.';
	$options = get_option( 'wpseo' );
	if ( isset( $options[ 'blocking_files' ] ) && is_array( $options[ 'blocking_files' ] ) && count( $options[ 'blocking_files' ] ) > 0 ) {
		$message = 'success';
		foreach ( $options[ 'blocking_files' ] as $k => $file ) {
			if ( !@unlink( $file ) )
				$message = __( 'Some files could not be removed. Please remove them via FTP.', 'wordpress-seo' );
			else
				unset( $options[ 'blocking_files' ][ $k ] );
		}
		update_option( 'wpseo', $options );
	}

	die( $message );
}

add_action( 'wp_ajax_wpseo_kill_blocking_files', 'wpseo_kill_blocking_files' );

/**
 * Retrieve the suggestions from the Google Suggest API and return them to be
 * used in the suggest box within the plugin. Dies on exit.
 */
function wpseo_get_suggest() {
	check_ajax_referer( 'wpseo-get-suggest' );

	$term   = urlencode( $_GET[ 'term' ] );
	$result = wp_remote_get( 'http://www.google.com/complete/search?output=toolbar&q=' . $term );

	preg_match_all( '/suggestion data="([^"]+)"\/>/u', $result[ 'body' ], $matches );

	$return_arr = array();

	foreach ( $matches[ 1 ] as $match ) {
		$return_arr[ ] = html_entity_decode( $match, ENT_COMPAT, "UTF-8" );
	}
	echo json_encode( $return_arr );
	die();
}

add_action( 'wp_ajax_wpseo_get_suggest', 'wpseo_get_suggest' );