347 lines
9 KiB
PHP
347 lines
9 KiB
PHP
<?php
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namespace Activitypub\Model;
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/**
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* ActivityPub Post Class
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*
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* @author Matthias Pfefferle
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*/
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class Post {
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private $post;
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private $post_author;
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private $permalink;
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private $summary;
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private $content;
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private $attachments;
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private $tags;
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private $object_type;
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/**
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* Initialize the class, registering WordPress hooks
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*/
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public static function init() {
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\add_filter( 'activitypub_the_summary', array( '\Activitypub\Model\Post', 'add_backlink_to_content' ), 15, 2 );
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\add_filter( 'activitypub_the_content', array( '\Activitypub\Model\Post', 'add_backlink_to_content' ), 15, 2 );
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}
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public function __construct( $post = null ) {
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$this->post = \get_post( $post );
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$this->post_author = $this->post->post_author;
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$this->permalink = $this->generate_permalink();
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$this->summary = $this->generate_the_title();
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$this->content = $this->generate_the_content();
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$this->attachments = $this->generate_attachments();
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$this->tags = $this->generate_tags();
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$this->object_type = $this->generate_object_type();
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}
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public function __call( $method, $params ) {
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$var = \strtolower( \substr( $method, 4 ) );
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if ( \strncasecmp( $method, 'get', 3 ) === 0 ) {
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return $this->$var;
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}
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if ( \strncasecmp( $method, 'set', 3 ) === 0 ) {
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$this->$var = $params[0];
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}
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}
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public function to_array() {
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$post = $this->post;
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$array = array(
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'id' => $this->permalink,
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'type' => $this->object_type,
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'published' => \date( 'Y-m-d\TH:i:s\Z', \strtotime( $post->post_date ) ),
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'attributedTo' => \get_author_posts_url( $post->post_author ),
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'summary' => $this->summary,
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'inReplyTo' => null,
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'content' => $this->content,
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'contentMap' => array(
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\strstr( \get_locale(), '_', true ) => $this->content,
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),
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'to' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
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'cc' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
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'attachment' => $this->attachments,
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'tag' => $this->tags,
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);
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return \apply_filters( 'activitypub_post', $array );
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}
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public function to_json() {
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return \wp_json_encode( $this->to_array(), \JSON_HEX_TAG | \JSON_HEX_AMP | \JSON_HEX_QUOT );
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}
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public function generate_permalink() {
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$post = $this->post;
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$permalink = \get_permalink( $post );
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// replace 'trashed' for delete activity
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return \str_replace( '__trashed', '', $permalink );
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}
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public function generate_attachments() {
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$max_images = \apply_filters( 'activitypub_max_images', 3 );
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$images = array();
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// max images can't be negative or zero
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if ( $max_images <= 0 ) {
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$max_images = 1;
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}
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$id = $this->post->ID;
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$image_ids = array();
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// list post thumbnail first if this post has one
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if ( \function_exists( 'has_post_thumbnail' ) && \has_post_thumbnail( $id ) ) {
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$image_ids[] = \get_post_thumbnail_id( $id );
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$max_images--;
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}
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// then list any image attachments
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$query = new \WP_Query(
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array(
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'post_parent' => $id,
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'post_status' => 'inherit',
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'post_type' => 'attachment',
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'post_mime_type' => 'image',
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'order' => 'ASC',
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'orderby' => 'menu_order ID',
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'posts_per_page' => $max_images,
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)
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);
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foreach ( $query->get_posts() as $attachment ) {
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if ( ! \in_array( $attachment->ID, $image_ids, true ) ) {
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$image_ids[] = $attachment->ID;
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}
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}
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$image_ids = \array_unique( $image_ids );
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// get URLs for each image
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foreach ( $image_ids as $id ) {
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$alt = \get_post_meta( $id, '_wp_attachment_image_alt', true );
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$thumbnail = \wp_get_attachment_image_src( $id, 'full' );
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$mimetype = \get_post_mime_type( $id );
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if ( $thumbnail ) {
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$image = array(
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'type' => 'Image',
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'url' => $thumbnail[0],
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'mediaType' => $mimetype,
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);
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if ( $alt ) {
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$image['name'] = $alt;
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}
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$images[] = $image;
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}
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}
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return $images;
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}
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public function generate_tags() {
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$tags = array();
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$post_tags = \get_the_tags( $this->post->ID );
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if ( $post_tags ) {
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foreach ( $post_tags as $post_tag ) {
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$tag = array(
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'type' => 'Hashtag',
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'href' => \get_tag_link( $post_tag->term_id ),
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'name' => '#' . $post_tag->slug,
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);
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$tags[] = $tag;
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}
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}
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return $tags;
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}
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/**
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* Returns the as2 object-type for a given post
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*
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* @param string $type the object-type
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* @param Object $post the post-object
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*
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* @return string the object-type
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*/
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public function generate_object_type() {
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if ( 'wordpress-post-format' !== \get_option( 'activitypub_object_type', 'note' ) ) {
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return \ucfirst( \get_option( 'activitypub_object_type', 'note' ) );
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}
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$post_type = \get_post_type( $this->post );
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switch ( $post_type ) {
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case 'post':
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$post_format = \get_post_format( $this->post );
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switch ( $post_format ) {
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case 'aside':
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case 'status':
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case 'quote':
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case 'note':
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$object_type = 'Note';
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break;
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case 'gallery':
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case 'image':
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$object_type = 'Image';
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break;
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case 'video':
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$object_type = 'Video';
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break;
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case 'audio':
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$object_type = 'Audio';
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break;
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default:
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$object_type = 'Article';
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break;
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}
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break;
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case 'page':
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$object_type = 'Page';
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break;
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case 'attachment':
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$mime_type = \get_post_mime_type();
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$media_type = \preg_replace( '/(\/[a-zA-Z]+)/i', '', $mime_type );
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switch ( $media_type ) {
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case 'audio':
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$object_type = 'Audio';
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break;
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case 'video':
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$object_type = 'Video';
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break;
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case 'image':
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$object_type = 'Image';
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break;
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}
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break;
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default:
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$object_type = 'Article';
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break;
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}
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return $object_type;
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}
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public function generate_the_content() {
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if ( 'excerpt' === \get_option( 'activitypub_post_content_type', 'content' ) ) {
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return $this->generate_the_post_summary();
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}
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if ( 'title' === \get_option( 'activitypub_post_content_type', 'content' ) ) {
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return $this->generate_the_title();
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}
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return $this->generate_the_post_content();
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}
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public function generate_the_title() {
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if ( 'Article' === $this->generate_object_type() ) {
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$title = \generate_the_title( $this->post );
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return \html_entity_decode( $title, \ENT_QUOTES, 'UTF-8' );
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}
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return null;
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}
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/**
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* Get the excerpt for a post for use outside of the loop.
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*
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* @param int Optional excerpt length.
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*
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* @return string The excerpt.
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*/
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public function generate_the_post_excerpt( $excerpt_length = 400 ) {
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$post = $this->post;
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$excerpt = \get_post_field( 'post_excerpt', $post );
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if ( '' === $excerpt ) {
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$content = \get_post_field( 'post_content', $post );
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// An empty string will make wp_trim_excerpt do stuff we do not want.
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if ( '' !== $content ) {
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$excerpt = \strip_shortcodes( $content );
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/** This filter is documented in wp-includes/post-template.php */
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$excerpt = \apply_filters( 'the_content', $excerpt );
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$excerpt = \str_replace( ']]>', ']]>', $excerpt );
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$excerpt_length = \apply_filters( 'excerpt_length', $excerpt_length );
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/** This filter is documented in wp-includes/formatting.php */
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$excerpt_more = \apply_filters( 'excerpt_more', ' [...]' );
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$excerpt = \wp_trim_words( $excerpt, $excerpt_length, $excerpt_more );
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}
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}
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return $excerpt;
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}
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/**
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* Get the content for a post for use outside of the loop.
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*
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* @return string The content.
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*/
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public function generate_the_post_content() {
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$post = $this->post;
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$content = \get_post_field( 'post_content', $post );
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$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><ul><ol><li><code><blockquote><pre>' );
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return \trim( \preg_replace( '/[\r\n]{2,}/', '', \strip_tags( $decoded_content, $allowed_html ) ) );
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}
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/**
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* Get the excerpt for a post for use outside of the loop.
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*
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* @param int Optional excerpt length.
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*
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* @return string The excerpt.
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*/
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public function generate_the_post_summary( $summary_length = 400 ) {
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$summary = $this->generate_the_post_excerpt( $summary_length );
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$filtered_summary = \apply_filters( 'the_excerpt', $summary );
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$filtered_summary = \apply_filters( 'activitypub_the_summary', $filtered_summary, $this->post );
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$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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}
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/**
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* Adds a backlink to the post/summary content
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*
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* @param string $content
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* @param WP_Post $post
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*
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* @return string
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*/
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public static function add_backlink_to_content( $content, $post ) {
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$link = '';
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if ( \get_option( 'activitypub_use_shortlink', 0 ) ) {
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$link = \esc_url( \wp_get_shortlink( $post->ID ) );
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} else {
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$link = \esc_url( \get_permalink( $post->ID ) );
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}
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return $content . '<p><a href="' . $link . '">' . $link . '</a></p>';
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}
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}
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