'description',
'_headspace_metakey' => 'keywords',
);
/**
* Register plugin's hooks
*
* @return null
*/
private function __construct() {
add_filter( 'pre_get_document_title', array( $this, 'filter_pre_get_document_title' ) );
add_filter( 'wp_title', array( $this, 'filter_wp_title' ), 10, 3 );
add_action( 'wp_head', array( $this, 'action_wp_head' ) );
add_action( 'wp_footer', array( $this, 'action_wp_footer' ) );
}
/**
* Filter page titles in WP 4.1+ themes
* add_theme_support( 'title-tag' )
*/
public function filter_pre_get_document_title( $title ) {
$_title = get_post_meta( get_the_ID(), '_headspace_page_title', true );
if ( ! empty( $_title ) ) {
$title = esc_html( $_title );
}
unset( $_title );
return $title;
}
/**
* Filter page titles in themes designed for < WP 4.1
* wp_title()
*/
public function filter_wp_title( $title, $sep, $loc ) {
$_title = get_post_meta( get_the_ID(), '_headspace_page_title', true );
if ( ! empty( $_title ) ) {
$_title = esc_html( $_title );
if ( 'right' == $loc ) {
$title = $_title . ' ' . $sep . ' ';
} else {
$title = ' ' . $sep . ' ' . $_title;
}
}
unset( $_title );
return $title;
}
/**
* Add meta tags
*/
public function action_wp_head() {
// Applies only to individual post objects
if ( ! is_singular() ) {
return;
}
// Check for HS data
$hs_data = array();
// Keys that only exist once per post
foreach ( array_merge( $this->hs_string_keys, $this->hs_robots_keys ) as $hs_key ) {
$value = get_post_meta( get_the_ID(), $hs_key, true );
if ( ! empty( $value ) ) {
$hs_data[ $hs_key ] = $value;
}
}
// Keys that can exist multiple times per post
foreach ( $this->hs_array_keys as $hs_key ) {
$values = get_post_meta( get_the_ID(), $hs_key, false );
if ( ! empty( $values ) ) {
$hs_data[ $hs_key ] = $values;
}
}
// Bail if no HS data exists for this post
if ( empty( $hs_data ) ) {
return;
}
// Handle basic, string-containing keys
$output = array();
foreach ( $hs_data as $hs_key => $hs_value ) {
switch( $hs_key ) {
case '_headspace_description' :
case '_headspace_metakey' :
$output[] = '';
break;
case '_headspace_scripts' :
foreach ( $hs_value as $_source ) {
$output[] = '';
}
break;
case '_headspace_stylesheets' :
foreach ( $hs_value as $_source ) {
$output[] = '';
}
break;
default :
continue;
break;
}
}
// Handle robots key, which is build from several meta keys
$robots = array();
foreach ( $this->hs_robots_keys as $hs_robot_key ) {
if ( isset( $hs_data[ $hs_robot_key] ) ) {
$robots[] = str_replace( '_headspace_', '', $hs_robot_key );
}
}
if ( ! empty( $robots ) ) {
if ( 1 === count( $robots ) && in_array( 'noindex', $robots ) ) {
$robots[] = 'follow';
}
$robots = implode( ',', $robots );
$output[] = '' . "\n";
}
// Raw output should follow all other output
if ( isset( $hs_data[ '_headspace_raw' ] ) && ! empty( $hs_data[ '_headspace_raw' ] ) ) {
$output[] = $hs_data[ '_headspace_raw' ];
}
// Output whatever we've built
if ( ! empty( $output ) ) {
echo "\n\n" . implode( "\n", $output ) . "\n\n";
}
}
/**
* Add custom footer content
*/
public function action_wp_footer() {
$output = get_post_meta( get_the_ID(), '_headspace_raw_footer', true );
if ( ! empty( $output ) ) {
echo $output . "\n";
}
}
}
ETH_Escape_HeadSpace2::get_instance();