<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
/**
Plugin Name: ETH Escape HeadSpace2
Plugin URI: https://ethitter.com/plugins/
Description: Output existing HeadSpace2 data without the original plugin. Allows HeadSpace2 (no longer maintained) to be deactivated without impactacting legacy content.
Author: Erick Hitter
Version: 0.2.1
Author URI: https://ethitter.com/
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* Class ETH_Escape_HeadSpace2.
*/
class ETH_Escape_HeadSpace2 {
/**
* Singleton
*
* @var self
*/
private static $instance = null;
/**
* Instantiate singleton
*/
public static function get_instance() {
if ( ! is_a( self::$instance, __CLASS__ ) ) {
self::$instance = new self();
}
return self::$instance;
}
/**
* Headspace's string keys.
*
* @var array
*/
private $hs_string_keys = array(
'_headspace_description',
'_headspace_metakey',
'_headspace_raw',
);
/**
* Headspace's array keys.
*
* @var array
*/
private $hs_array_keys = array(
'_headspace_scripts',
'_headspace_stylesheets',
);
/**
* Headspace's robots.txt keys.
*
* @var array
*/
private $hs_robots_keys = array(
'_headspace_noindex',
'_headspace_nofollow',
'_headspace_noarchive',
'_headspace_noodp',
'_headspace_noydir',
);
/**
* Map Headspace keys.
*
* @var array
*/
private $hs_keys_to_meta_names = array(
'_headspace_description' => 'description',
'_headspace_metakey' => 'keywords',
);
/**
* Defer plugin hook additions until all plugins are loaded
* Allows plugin to defer to HeadSpace2 when active
*
* @return null
*/
private function __construct() {
add_action( 'plugins_loaded', array( $this, 'maybe_add_hooks' ) );
}
/**
* Conditionally register plugin's hooks
*/
public function maybe_add_hooks() {
// Defer to HeadSpace2 when active.
if ( class_exists( 'HeadSpace_Plugin' ) ) {
return;
}
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' ).
*
* @param string $title Page title.
* @return string
*/
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().
*
* @param string $title Object title.
* @param string $sep Title separator.
* @param string $loc Separator location.
* @return string
*/
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 <head> 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[] = '<meta name="' . esc_attr( $this->hs_keys_to_meta_names[ $hs_key ] ) . '" content="' . esc_attr( $hs_value ) . '" />';
break;
case '_headspace_scripts':
foreach ( $hs_value as $_source ) {
$output[] = '<script type="text/javascript" src="' . esc_url( $_source ) . '"></script>';
}
break;
case '_headspace_stylesheets':
foreach ( $hs_value as $_source ) {
$output[] = '<link rel="stylesheet" href="' . esc_url( $_source ) . '" type="text/css" />';
}
break;
default:
continue 2;
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[] = '<meta name="robots" content="' . esc_attr( $robots ) . '" />' . "\n";
}
// Raw output should follow all other output.
if ( ! empty( $hs_data['_headspace_raw'] ) ) {
$output[] = $hs_data['_headspace_raw'];
}
// Output whatever we've built.
if ( ! empty( $output ) ) {
// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
echo "\n<!-- Escape HeadSpace2 by Erick Hitter; https://ethitter.com/plugins/ -->\n" . implode( "\n", $output ) . "\n<!-- Escape HeadSpace2 -->\n";
}
}
/**
* Add custom footer content
*/
public function action_wp_footer() {
$output = get_post_meta( get_the_ID(), '_headspace_raw_footer', true );
if ( ! empty( $output ) ) {
// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
echo $output . "\n";
}
}
}
ETH_Escape_HeadSpace2::get_instance();