wordpress-activitypub/includes/model/class-post.php
2022-12-19 14:16:54 -07:00

457 lines
12 KiB
PHP

<?php
namespace Activitypub\Model;
/**
* ActivityPub Post Class
*
* @author Matthias Pfefferle
*/
class Post {
private $post;
private $post_author;
private $id;
private $summary;
private $content;
private $attachments;
private $tags;
private $object_type;
private $deleted;
private $updated;
private $permalink;
public function __construct( $post = null ) {
$this->post = \get_post( $post );
$this->post_author = $this->post->post_author;
$this->id = $this->generate_id();
$this->summary = $this->generate_the_title();
$this->content = $this->generate_the_content();
$this->attachments = $this->generate_attachments();
$this->tags = $this->generate_tags();
$this->object_type = $this->generate_object_type();
$this->replies = $this->generate_replies();
$this->updated = $this->generate_updated();
$this->delete = $this->get_deleted();
$this->permalink = $this->get_the_permalink();
}
public function __call( $method, $params ) {
$var = \strtolower( \substr( $method, 4 ) );
if ( \strncasecmp( $method, 'get', 3 ) === 0 ) {
return $this->$var;
}
if ( \strncasecmp( $method, 'set', 3 ) === 0 ) {
$this->$var = $params[0];
}
}
public function to_array() {
$post = $this->post;
$array = array(
'id' => $this->id,
'type' => $this->object_type,
'published' => \gmdate( 'Y-m-d\TH:i:s\Z', \strtotime( $post->post_date_gmt ) ),
'attributedTo' => \get_author_posts_url( $post->post_author ),
'summary' => $this->summary,
'inReplyTo' => null,
'url' => $this->permalink,
'content' => $this->content,
'contentMap' => array(
\strstr( \get_locale(), '_', true ) => $this->content,
),
'to' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
'cc' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
'attachment' => $this->attachments,
'tag' => $this->tags,
);
if ( $this->replies ) {
$array['replies'] = $this->replies;
}
if ( $this->deleted ) {
$array['deleted'] = \gmdate( 'Y-m-d\TH:i:s\Z', \strtotime( $post->post_modified_gmt ) );
$deleted_post_slug = \get_post_meta( $post->ID, '_activitypub_permalink_compat', true );
if ( $deleted_post_slug ) {
$array['id'] = $deleted_post_slug;
}
}
if ( $this->updated ) {
$array['updated'] = \gmdate( 'Y-m-d\TH:i:s\Z', \strtotime( $post->post_modified_gmt ) );
}
return \apply_filters( 'activitypub_post', $array );
}
public function to_json() {
return \wp_json_encode( $this->to_array(), \JSON_HEX_TAG | \JSON_HEX_AMP | \JSON_HEX_QUOT );
}
public function generate_id() {
$post = $this->post;
$object_id = \add_query_arg( //
array(
'p' => $post->ID,
),
trailingslashit( site_url() )
);
$pretty_permalink = \get_post_meta( $post->ID, '_activitypub_permalink_compat', true );
if ( ! empty( $pretty_permalink ) ) {
$object_id = $pretty_permalink;
}
return $object_id;
}
public function generate_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, true ) ) {
$image_ids[] = $attachment->ID;
}
}
$image_ids = \array_unique( $image_ids );
// get URLs for each image
foreach ( $image_ids as $id ) {
$alt = \get_post_meta( $id, '_wp_attachment_image_alt', true );
$thumbnail = \wp_get_attachment_image_src( $id, 'full' );
$mimetype = \get_post_mime_type( $id );
if ( $thumbnail ) {
$image = array(
'type' => 'Image',
'url' => $thumbnail[0],
'mediaType' => $mimetype,
);
if ( $alt ) {
$image['name'] = $alt;
}
$images[] = $image;
}
}
return $images;
}
public function generate_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 ),
'name' => '#' . $post_tag->slug,
);
$tags[] = $tag;
}
}
return $tags;
}
public function generate_replies() {
$replies = null;
if ( $this->post->comment_count > 0 ) {
$args = array(
'post_id' => $this->post->ID,
'hierarchical' => false,
'status' => 'approve',
);
$comments = \get_comments( $args );
$items = array();
foreach ( $comments as $comment ) {
// include self replies
if ( $this->post->post_author === $comment->user_id ) {
$comment_url = \add_query_arg( //
array(
'p' => $this->post->ID,
'replytocom' => $comment->comment_ID,
),
trailingslashit( site_url() )
);
$items[] = $comment_url;
} else {
$ap_object = \unserialize( \get_comment_meta( $comment->comment_ID, 'ap_object', true ) );
$comment_url = \get_comment_meta( $comment->comment_ID, 'source_url', true );
if ( ! empty( $comment_url ) ) {
$items[] = \get_comment_meta( $comment->comment_ID, 'source_url', true );
}
}
}
$replies = (object) array(
'type' => 'Collection',
'id' => \add_query_arg( array( 'replies' => '' ), $this->id ),
'first' => (object) array(
'type' => 'CollectionPage',
'partOf' => \add_query_arg( array( 'replies' => '' ), $this->id ),
'items' => $items,
),
);
}
return $replies;
}
/**
* 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 generate_object_type() {
if ( 'wordpress-post-format' !== \get_option( 'activitypub_object_type', 'note' ) ) {
return \ucfirst( \get_option( 'activitypub_object_type', 'note' ) );
}
$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 generate_the_content() {
$post = $this->post;
$content = $this->get_post_content_template();
$content = \str_replace( '%title%', \get_the_title( $post->ID ), $content );
$content = \str_replace( '%excerpt%', $this->get_the_post_excerpt(), $content );
$content = \str_replace( '%content%', $this->get_the_post_content(), $content );
$content = \str_replace( '%permalink%', $this->get_the_post_link( 'permalink' ), $content );
$content = \str_replace( '%shortlink%', $this->get_the_post_link( 'shortlink' ), $content );
$content = \str_replace( '%hashtags%', $this->get_the_post_hashtags(), $content );
// backwards compatibility
$content = \str_replace( '%tags%', $this->get_the_post_hashtags(), $content );
$content = \trim( \preg_replace( '/[\r\n]{2,}/', '', $content ) );
$filtered_content = \apply_filters( 'activitypub_the_content', $content, $this->post );
$decoded_content = \html_entity_decode( $filtered_content, \ENT_QUOTES, 'UTF-8' );
$allowed_html = \apply_filters( 'activitypub_allowed_html', \get_option( 'activitypub_allowed_html', ACTIVITYPUB_ALLOWED_HTML ) );
if ( $allowed_html ) {
return \strip_tags( $decoded_content, $allowed_html );
}
return $decoded_content;
}
public function get_post_content_template() {
if ( 'excerpt' === \get_option( 'activitypub_post_content_type', 'content' ) ) {
return "%excerpt%\n\n<p>%permalink%</p>";
}
if ( 'title' === \get_option( 'activitypub_post_content_type', 'content' ) ) {
return "<p><strong>%title%</strong></p>\n\n<p>%permalink%</p>";
}
if ( 'content' === \get_option( 'activitypub_post_content_type', 'content' ) ) {
return "%content%\n\n<p>%hashtags%</p>\n\n<p>%permalink%</p>";
}
return \get_option( 'activitypub_custom_post_content', ACTIVITYPUB_CUSTOM_POST_CONTENT );
}
/**
* 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_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 );
}
}
return \apply_filters( 'the_excerpt', $excerpt );
}
/**
* Get the content for a post for use outside of the loop.
*
* @return string The content.
*/
public function get_the_post_content() {
$post = $this->post;
$content = \get_post_field( 'post_content', $post );
return \apply_filters( 'the_content', $content );
}
/**
* Adds a backlink to the post/summary content
*
* @param string $content
* @param WP_Post $post
*
* @return string
*/
public function get_the_post_link( $type = 'permalink' ) {
$post = $this->post;
if ( 'shortlink' === $type ) {
$link = \esc_url( \wp_get_shortlink( $post->ID ) );
} elseif ( 'permalink' === $type ) {
$link = \esc_url( \get_permalink( $post->ID ) );
} else {
return '';
}
return \sprintf( '<a href="%1$s">%1$s</a>', $link );
}
/**
* Gets the federated permalink
*
* @return string
*/
public function get_the_permalink() {
$post = $this->post;
$link = \get_permalink( $post->ID );
return $link;
}
/**
* Adds all tags as hashtags to the post/summary content
*
* @param string $content
* @param WP_Post $post
*
* @return string
*/
public function get_the_post_hashtags() {
$post = $this->post;
$tags = \get_the_tags( $post->ID );
if ( ! $tags ) {
return '';
}
$hash_tags = array();
foreach ( $tags as $tag ) {
$hash_tags[] = \sprintf( '<a rel="tag" class="u-tag u-category" href="%s">#%s</a>', \get_tag_link( $tag ), $tag->slug );
}
return \implode( ' ', $hash_tags );
}
/**
* Get deleted datetime
*/
public function get_deleted() {
$post = $this->post;
$deleted = null;
if ( 'trash' === $post->post_status ) {
$deleted = \gmdate( 'Y-m-d\TH:i:s\Z', \strtotime( $post->post_modified_gmt ) );
}
return $deleted;
}
}