wordpress-activitypub/includes/class-activitypub-post.php

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<?php
/**
* ActivityPub Post Class
*
* @author Matthias Pfefferle
*/
class Activitypub_Post {
private $post;
public function __construct( $post = null ) {
$this->post = get_post( $post );
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}
public function get_post() {
return $this->post;
}
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public function get_post_author() {
return $this->post->post_author;
}
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public function to_array() {
$post = $this->post;
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$array = array(
'id' => get_permalink( $post ),
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'type' => $this->get_object_type(),
'published' => date( 'Y-m-d\TH:i:s\Z', strtotime( $post->post_date ) ),
'attributedTo' => get_author_posts_url( $post->post_author ),
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'summary' => $this->get_the_summary(),
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'inReplyTo' => null,
'content' => $this->get_the_content(),
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'contentMap' => array(
strstr( get_locale(), '_', true ) => $this->get_the_content(),
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),
'to' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
'cc' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
'attachment' => $this->get_attachments(),
'tag' => $this->get_tags(),
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);
return apply_filters( 'activitypub_post', $array );
}
public function to_json() {
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return wp_json_encode( $this->to_array(), JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_QUOT );
}
public function get_attachments() {
$max_images = apply_filters( 'activitypub_max_images', 3 );
$images = array();
// max images can't be negative or zero
if ( $max_images <= 0 ) {
$max_images = 1;
}
$id = $this->post->ID;
$image_ids = array();
// list post thumbnail first if this post has one
if ( function_exists( 'has_post_thumbnail' ) && has_post_thumbnail( $id ) ) {
$image_ids[] = get_post_thumbnail_id( $id );
$max_images--;
}
// then list any image attachments
$query = new WP_Query(
array(
'post_parent' => $id,
'post_status' => 'inherit',
'post_type' => 'attachment',
'post_mime_type' => 'image',
'order' => 'ASC',
'orderby' => 'menu_order ID',
'posts_per_page' => $max_images,
)
);
foreach ( $query->get_posts() as $attachment ) {
if ( ! in_array( $attachment->ID, $image_ids ) ) {
$image_ids[] = $attachment->ID;
}
}
// get URLs for each image
foreach ( $image_ids as $id ) {
$thumbnail = wp_get_attachment_image_src( $id, 'full' );
$mimetype = get_post_mime_type( $id );
if ( $thumbnail ) {
$images[] = array(
'url' => $thumbnail[0],
'type' => $mimetype
);
}
}
$attachments = array();
// add attachments
if ( $images ) {
foreach ( $images as $image ) {
$attachment = array(
"type" => "Image",
"url" => $image['url'],
"mediaType" => $image['type'],
);
$attachments[] = $attachment;
}
}
return $attachments;
}
public function get_tags() {
$tags = array();
$post_tags = get_the_tags( $this->post->ID );
if ( $post_tags ) {
foreach( $post_tags as $post_tag ) {
$tag = array(
"type" => "Hashtag",
"href" => get_tag_link( $post_tag->term_id ),
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"name" => '#' . $post_tag->slug,
);
$tags[] = $tag;
}
}
return $tags;
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}
/**
* Returns the as2 object-type for a given post
*
* @param string $type the object-type
* @param Object $post the post-object
*
* @return string the object-type
*/
public function get_object_type() {
if ( 'wordpress-post-format' !== get_option( 'activitypub_object_type', 'note' ) ) {
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return ucfirst( get_option( 'activitypub_object_type', 'note' ) );
}
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$post_type = get_post_type( $this->post );
switch ( $post_type ) {
case 'post':
$post_format = get_post_format( $this->post );
switch ( $post_format ) {
case 'aside':
case 'status':
case 'quote':
case 'note':
$object_type = 'Note';
break;
case 'gallery':
case 'image':
$object_type = 'Image';
break;
case 'video':
$object_type = 'Video';
break;
case 'audio':
$object_type = 'Audio';
break;
default:
$object_type = 'Article';
break;
}
break;
case 'page':
$object_type = 'Page';
break;
case 'attachment':
$mime_type = get_post_mime_type();
$media_type = preg_replace( '/(\/[a-zA-Z]+)/i', '', $mime_type );
switch ( $media_type ) {
case 'audio':
$object_type = 'Audio';
break;
case 'video':
$object_type = 'Video';
break;
case 'image':
$object_type = 'Image';
break;
}
break;
default:
$object_type = 'Article';
break;
}
return $object_type;
}
public function get_the_content() {
if ( 'excerpt' === get_option( 'activitypub_post_content_type', 'excerpt' ) ) {
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return $this->get_the_post_summary();
}
return $this->get_the_post_content();
}
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public function get_the_summary() {
if ( 'Article' === $this->get_object_type() ) {
return $this->get_the_post_excerpt( 400 );
}
return null;
}
/**
* Get the excerpt for a post for use outside of the loop.
*
* @param int Optional excerpt length.
*
* @return string The excerpt.
*/
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public function get_the_post_excerpt( $excerpt_length = 400 ) {
$post = $this->post;
$excerpt = get_post_field( 'post_excerpt', $post );
if ( '' === $excerpt ) {
$content = get_post_field( 'post_content', $post );
// An empty string will make wp_trim_excerpt do stuff we do not want.
if ( '' !== $content ) {
$excerpt = strip_shortcodes( $content );
/** This filter is documented in wp-includes/post-template.php */
$excerpt = apply_filters( 'the_content', $excerpt );
$excerpt = str_replace( ']]>', ']]>', $excerpt );
$excerpt_length = apply_filters( 'excerpt_length', $excerpt_length );
/** This filter is documented in wp-includes/formatting.php */
$excerpt_more = apply_filters( 'excerpt_more', ' [...]' );
$excerpt = wp_trim_words( $excerpt, $excerpt_length, $excerpt_more );
}
}
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return html_entity_decode( $excerpt, ENT_QUOTES, 'UTF-8' );
}
/**
* Get the content for a post for use outside of the loop.
*
* @return string The content.
*/
public function get_the_post_content( $with_link = true ) {
$post = $this->post;
$content = get_post_field( 'post_content', $post );
$filtered_content = apply_filters( 'the_content', $content );
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$filtered_content = apply_filters( 'activitypub_the_content', $filtered_content, $this->post );
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$decoded_content = html_entity_decode( $filtered_content, ENT_QUOTES, 'UTF-8' );
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$allowed_html = apply_filters( 'activitypub_allowed_html', '<a><p>' );
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return trim( preg_replace( '/[\r\n]{2,}/', '', strip_tags( $decoded_content, $allowed_html) ) );
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}
/**
* Get the excerpt for a post for use outside of the loop.
*
* @param int Optional excerpt length.
*
* @return string The excerpt.
*/
public function get_the_post_summary( $summary_length = 400 ) {
$summary = $this->get_the_post_excerpt( $summary_length );
$filtered_summary = apply_filters( 'the_excerpt', $summary );
$filtered_summary = apply_filters( 'activitypub_the_summary', $filtered_summary, $this->post );
$decoded_summary = html_entity_decode( $filtered_summary, ENT_QUOTES, 'UTF-8' );
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$allowed_html = apply_filters( 'activitypub_allowed_html', '<a><p>' );
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return trim( preg_replace( '/[\r\n]{2,}/', '', strip_tags( $decoded_summary, $allowed_html) ) );
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}
public static function add_backlink( $content, $post ) {
$link = '';
if ( get_option( 'activitypub_use_shortlink', 0 ) ) {
$link = esc_url( wp_get_shortlink( $post->ID ) );
} else {
$link = esc_url( get_permalink( $post->ID ) );
}
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return $content . '<p><a href="' . $link . '">' . $link . '</a></p>';
}
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}