wordpress-activitypub/includes/class-activitypub.php

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<?php
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/**
* ActivityPub Class
*
* @author Matthias Pfefferle
*/
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class Activitypub {
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/**
* Return a AS2 JSON version of an author, post or page
*
* @param string $template the path to the template object
*
* @return string the new path to the JSON template
*/
public static function render_json_template( $template ) {
if ( ! is_author() && ! is_singular() ) {
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return $template;
}
if ( is_author() ) {
$json_template = dirname( __FILE__ ) . '/../templates/json-author.php';
} elseif ( is_singular() ) {
$json_template = dirname( __FILE__ ) . '/../templates/json-post.php';
}
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global $wp_query;
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if ( isset( $wp_query->query_vars['as2'] ) ) {
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return $json_template;
}
if ( ! isset( $_SERVER['HTTP_ACCEPT'] ) ) {
return $template;
}
// interpret accept header
$pos = stripos( $_SERVER['HTTP_ACCEPT'], ';' );
if ( $pos ) {
$accept_header = substr( $_SERVER['HTTP_ACCEPT'], 0, $pos );
} else {
$accept_header = $_SERVER['HTTP_ACCEPT'];
}
// accept header as an array
$accept = explode( ',', trim( $accept_header ) );
if (
! in_array( 'application/activity+json', $accept, true ) &&
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! in_array( 'application/ld+json', $accept, true ) &&
! in_array( 'application/json', $accept, true )
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) {
return $template;
}
return $json_template;
}
/**
* Add the 'photos' query variable so WordPress
* won't mangle it.
*/
public static function add_query_vars( $vars ) {
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$vars[] = 'as2';
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return $vars;
}
/**
* Add our rewrite endpoint to permalinks and pages.
*/
public static function add_rewrite_endpoint() {
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add_rewrite_endpoint( 'as2', EP_AUTHORS | EP_PERMALINK | EP_PAGES );
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}
}