','

 and  tags
 **/
function pkalrp_base64decode( $matches, $tag = 'span' ) {
	switch ($tag) {
	case 'pre':
		return '';
		break;
	case 'code':
		return '';
		break;
	default:
		return ''.base64_decode( $matches[1] ).'';
		break;
	}
}


/**
 * callback, base64encode. use for CSS3 tooltip, 
 and  tags
 **/
function pkalrp_base64encode( $matches, $tag = 'span' ) {
	switch ($tag) {
	case 'pre':
		return '#pre#'.base64_encode( $matches[1] ).'#/pre#';
		break;
	case 'code':
		return '#code#'.base64_encode( $matches[1] ).'#/code#';
		break;
	}
}


function pkalrp_base64decode_span( $matches ) {
	return pkalrp_base64decode ( $matches );
}


function pkalrp_base64decode_pre( $matches ) {
	return pkalrp_base64decode ( $matches, 'pre' );
}


function pkalrp_base64decode_code( $matches ) {
	return pkalrp_base64decode ( $matches, 'code' );
}


function pkalrp_base64encode_pre( $matches ) {
	return pkalrp_base64encode ( $matches, 'pre' );
}


function pkalrp_base64encode_code( $matches ) {
	return pkalrp_base64encode ( $matches, 'code' );
}


/**
 * related posts on error page 404
 **/
function seo_alrp_404( $limit=8 ) {
	$search_term = pkalrp_get_404_title();
	echo pkalrp_get_related_posts ( $search_term, $limit );
}


/**
 * get error page 404 title
 **/
function pkalrp_get_404_title() {
	$basename = str_replace( array( '.php','.html','.htm' ),'',basename( $_SERVER['REQUEST_URI'] ) );
	$search = array ( '@[\/]+@', '@( \..* )@', '@[\-]+@', '@[\_]+@', '@[\s]+@', '@archives@','@( \?.* )@','/\d/' );
	$replace = array ( ' ', '', ' ', ' ', ' ', '', '','' );
	$search_term = preg_replace( $search, $replace, $basename );
	$search_term = trim( $search_term );
	return $search_term;
}


/**
 * capitalize 404 title
 **/
function seo_alrp_404_title() {
	echo ucwords( pkalrp_get_404_title() );
}


/**
 * get thumbnail url
 **/
function pkalrp_get_thumbnail_url( $search, $options ) {

	if ( ( function_exists( 'has_post_thumbnail' ) ) && ( has_post_thumbnail( $search->ID ) ) ) {
		$image_url = wp_get_attachment_image_src( get_post_thumbnail_id( $search->ID ), 'thumbnail' );
		$thumbnail_url = $image_url[0];
	} else {
		$thumbnail_url = get_post_meta( $search->ID, $options['customfield'], true );
		if ( empty($thumbnail_url) ) {
			preg_match_all( '||i', $search->post_content, $matches );
			if( isset( $matches ) && isset($matches[1][0]) ) {
				$thumbnail_url = $matches[1][0];
			}
		}
	}
	if ( empty($thumbnail_url) ) $thumbnail_url = $options['defthumb'];
	
	// use timthumb if and only if the file hosted in our server
	// if ( ( 1 === $options['timthumb'] ) && ( parse_url( $thumbnail_url, PHP_URL_HOST ) == parse_url( site_url(),  PHP_URL_HOST ) ) ) {
	if ( 1 === $options['timthumb'] ){
		$timthumb_url = ALRP_URL.'/php/thumb.php';
	
		if ( pkalrp_is_img_in_trusted_server( $thumbnail_url ) ){
			if ( parse_url( $thumbnail_url, PHP_URL_HOST ) == parse_url( site_url(),  PHP_URL_HOST ) ){
				$thumbnail_url = pkalrp_get_image_path( $thumbnail_url );
			}
			$thumbnail_url = $timthumb_url.'?src='.$thumbnail_url.'&h='.$options['imgh'].'&w='.$options['imgw'].'&q=90&zc=1';
		}
	}

	return $thumbnail_url;
}

/**
 * check if img hosted in trusted website, match with allowed external sites setting in file thumb.php
 **/
function pkalrp_is_img_in_trusted_server( $url ) {
	$localhost = parse_url( site_url(),  PHP_URL_HOST );
	$trusted_server = explode(',', $localhost .',flickr.com,staticflickr.com,picasa.com,img.youtube.com,upload.wikimedia.org,photobucket.com,imgur.com,imageshack.us,tinypic.com,facebook.com,amazon.com,amazon.co.uk,amazon.ca,amazon.it,amazon.fr,amazon.ge,amazon.es,tinypic.com');
	
	foreach( $trusted_server as $server ){
    	if(($pos = strpos($url, $server))!==false) return $pos;
    }
    return false;
    
}

/**
 * Get image page, WPMU safe
 **/
function pkalrp_get_image_path( $src ) {

	global $blog_id;
	if ( isset( $blog_id ) && $blog_id > 0 ) {
		$imageParts = explode( '/files/', $src );
		if ( isset( $imageParts[1] ) ) {
			$src = '/blogs.dir/' . $blog_id . '/files/' . $imageParts[1];
		}
	}
	$ret = strstr( $src, '/wp-content' );
	$src = ( $ret ) ? $ret : $src;
	return $src;
}


/**
 * enqueue our js and css
 **/
add_action( 'wp_enqueue_scripts', 'pkalrp_enqueue_scripts' );
function pkalrp_enqueue_scripts() {
	if ( !is_admin() ) {

		wp_enqueue_script( 'jquery' );
		wp_enqueue_script( 'alrp_slidebox.js', ALRP_URL.'/js/slidebox.js', array( 'jquery' ) );

		$options = get_option( 'alrp_rp_options' );
		if ( 'title-only' == $options['layout'] || 
			'title-content' == $options['layout'] || 
			'thumbnail-only' == $options['layout'] || 
			'thumbnail-only-clean' == $options['layout'] 
			){
			wp_enqueue_style( 'alrp-title-only', ALRP_URL.'/css/'. $options['layout'] .'.css' );
		}

		$options = get_option( 'alrp_sb_options' );
		$theme = (!isset($options['theme'])) ? 'light' : $options['theme'];
		wp_enqueue_style( 'alrp_slidebox.css', ALRP_URL. '/css/slidebox-'.$theme.'.css' );

		$options = get_option( 'alrp_gs_options' );
		if ($options['enabletip']){
			$tiptheme = (!isset($options['tiptheme'])) ? 'light' : $options['tiptheme'];
			wp_enqueue_style( 'alrp_tooltip.css', ALRP_URL. '/css/tooltip-'.$tiptheme.'.css' );
		}
	}
}

add_action('wp_head','pkalrp_include_dynamic_css');
function pkalrp_include_dynamic_css(){
	$options = get_option( 'alrp_rp_options' );
	if ('thumbnail-title-clean' == $options['layout'] || 
		'thumbnail-title' == $options['layout'] ||
		'title-content-thumbnail' == $options['layout'] ||
		'title-content-thumbnail-clean' == $options['layout']
		){
		include_once dirname( __FILE__ ).'/css/'.$options['layout'].'.css.php';
	}
}

/**
 * for debugging purpose only
 **/
add_action( 'activated_plugin','pkalrp_save_error' );
function pkalrp_save_error() {
	$ret = ob_get_contents();
	if (!empty($ret))
		update_option( 'alrp_activation_error',  $ret );
}


/**
 * when post got updated, clear cache for the corresponding post
 **/
add_action( 'save_post', 'pkalrp_action_save_post' );
function pkalrp_action_save_post( $post_id ) {
	if ( !wp_is_post_revision( $post_id ) ) {
		pkalrp_db_del_transients_key( $post_id );
	}
}


/**
 * get current options, use default options if empty
 **/
function pkalrp_update_options( $current, $default ) {
	if ( !empty( $current ) ) {
		foreach ( $current as $key => $value ) {
			$default[$key] = $value;
		}
	}
	return $default;
}


?>