activitypub / includes / class-activitypub-post.php

class-activitypub-post.php in ActivityPub 0.3.2, at includes/class-activitypub-post.php

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1	<?php
2	/**
3	* ActivityPub Post Class
4	*
5	* @author Matthias Pfefferle
6	*/
7	class Activitypub_Post {
8	private $post;
9
10	public function __construct( $post = null ) {
11	$this->post = get_post( $post );
12	}
13
14	public function get_post() {
15	return $this->post;
16	}
17
18	public function get_post_author() {
19	return $this->post->post_author;
20	}
21
22	public function to_array() {
23	$post = $this->post;
24
25	$array = array(
26	'id' => get_permalink( $post ),
27	'type' => $this->get_object_type(),
28	'published' => date( 'Y-m-d\TH:i:s\Z', strtotime( $post->post_date ) ),
29	'attributedTo' => get_author_posts_url( $post->post_author ),
30	'summary' => $this->get_the_summary(),
31	'inReplyTo' => null,
32	'content' => $this->get_the_content(),
33	'contentMap' => array(
34	strstr( get_locale(), '_', true ) => $this->get_the_content(),
35	),
36	'to' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
37	'cc' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
38	'attachment' => $this->get_attachments(),
39	'tag' => $this->get_tags(),
40	);
41
42	return apply_filters( 'activitypub_post', $array );
43	}
44
45	public function to_json() {
46	return wp_json_encode( $this->to_array(), JSON_HEX_TAG \| JSON_HEX_AMP \| JSON_HEX_QUOT );
47	}
48
49	public function get_attachments() {
50	$max_images = apply_filters( 'activitypub_max_images', 3 );
51
52	$images = array();
53
54	// max images can't be negative or zero
55	if ( $max_images <= 0 ) {
56	$max_images = 1;
57	}
58
59	$id = $this->post->ID;
60
61	$image_ids = array();
62	// list post thumbnail first if this post has one
63	if ( function_exists( 'has_post_thumbnail' ) && has_post_thumbnail( $id ) ) {
64	$image_ids[] = get_post_thumbnail_id( $id );
65	$max_images--;
66	}
67	// then list any image attachments
68	$query = new WP_Query(
69	array(
70	'post_parent' => $id,
71	'post_status' => 'inherit',
72	'post_type' => 'attachment',
73	'post_mime_type' => 'image',
74	'order' => 'ASC',
75	'orderby' => 'menu_order ID',
76	'posts_per_page' => $max_images,
77	)
78	);
79	foreach ( $query->get_posts() as $attachment ) {
80	if ( ! in_array( $attachment->ID, $image_ids ) ) {
81	$image_ids[] = $attachment->ID;
82	}
83	}
84	// get URLs for each image
85	foreach ( $image_ids as $id ) {
86	$thumbnail = wp_get_attachment_image_src( $id, 'full' );
87	$mimetype = get_post_mime_type( $id );
88
89	if ( $thumbnail ) {
90	$images[] = array(
91	'url' => $thumbnail[0],
92	'type' => $mimetype
93	);
94	}
95	}
96
97	$attachments = array();
98
99	// add attachments
100	if ( $images ) {
101	foreach ( $images as $image ) {
102	$attachment = array(
103	"type" => "Image",
104	"url" => $image['url'],
105	"mediaType" => $image['type'],
106	);
107	$attachments[] = $attachment;
108	}
109	}
110
111	return $attachments;
112	}
113
114	public function get_tags() {
115	$tags = array();
116
117	$post_tags = get_the_tags( $this->post->ID );
118	if ( $post_tags ) {
119	foreach( $post_tags as $post_tag ) {
120	$tag = array(
121	"type" => "Hashtag",
122	"href" => get_tag_link( $post_tag->term_id ),
123	"name" => '#' . $post_tag->slug,
124	);
125	$tags[] = $tag;
126	}
127	}
128
129	return $tags;
130	}
131
132	/**
133	* Returns the as2 object-type for a given post
134	*
135	* @param string $type the object-type
136	* @param Object $post the post-object
137	*
138	* @return string the object-type
139	*/
140	public function get_object_type() {
141	if ( 'wordpress-post-format' !== get_option( 'activitypub_object_type', 'note' ) ) {
142	return ucfirst( get_option( 'activitypub_object_type', 'note' ) );
143	}
144
145	$post_type = get_post_type( $this->post );
146	switch ( $post_type ) {
147	case 'post':
148	$post_format = get_post_format( $this->post );
149	switch ( $post_format ) {
150	case 'aside':
151	case 'status':
152	case 'quote':
153	case 'note':
154	$object_type = 'Note';
155	break;
156	case 'gallery':
157	case 'image':
158	$object_type = 'Image';
159	break;
160	case 'video':
161	$object_type = 'Video';
162	break;
163	case 'audio':
164	$object_type = 'Audio';
165	break;
166	default:
167	$object_type = 'Article';
168	break;
169	}
170	break;
171	case 'page':
172	$object_type = 'Page';
173	break;
174	case 'attachment':
175	$mime_type = get_post_mime_type();
176	$media_type = preg_replace( '/(\/[a-zA-Z]+)/i', '', $mime_type );
177	switch ( $media_type ) {
178	case 'audio':
179	$object_type = 'Audio';
180	break;
181	case 'video':
182	$object_type = 'Video';
183	break;
184	case 'image':
185	$object_type = 'Image';
186	break;
187	}
188	break;
189	default:
190	$object_type = 'Article';
191	break;
192	}
193
194	return $object_type;
195	}
196
197	public function get_the_content() {
198	if ( 'excerpt' === get_option( 'activitypub_post_content_type', 'content' ) ) {
199	return $this->get_the_post_summary();
200	}
201
202	return $this->get_the_post_content();
203	}
204
205	public function get_the_summary() {
206	if ( 'Article' === $this->get_object_type() ) {
207	return $this->get_the_post_excerpt( 400 );
208	}
209
210	return null;
211	}
212
213	/**
214	* Get the excerpt for a post for use outside of the loop.
215	*
216	* @param int Optional excerpt length.
217	*
218	* @return string The excerpt.
219	*/
220	public function get_the_post_excerpt( $excerpt_length = 400 ) {
221	$post = $this->post;
222
223	$excerpt = get_post_field( 'post_excerpt', $post );
224
225	if ( '' === $excerpt ) {
226
227	$content = get_post_field( 'post_content', $post );
228
229	// An empty string will make wp_trim_excerpt do stuff we do not want.
230	if ( '' !== $content ) {
231
232	$excerpt = strip_shortcodes( $content );
233
234	/** This filter is documented in wp-includes/post-template.php */
235	$excerpt = apply_filters( 'the_content', $excerpt );
236	$excerpt = str_replace( ']]>', ']]>', $excerpt );
237
238	$excerpt_length = apply_filters( 'excerpt_length', $excerpt_length );
239
240	/** This filter is documented in wp-includes/formatting.php */
241	$excerpt_more = apply_filters( 'excerpt_more', ' [...]' );
242
243	$excerpt = wp_trim_words( $excerpt, $excerpt_length, $excerpt_more );
244	}
245	}
246
247	return html_entity_decode( $excerpt, ENT_QUOTES, 'UTF-8' );
248	}
249
250	/**
251	* Get the content for a post for use outside of the loop.
252	*
253	* @return string The content.
254	*/
255	public function get_the_post_content( $with_link = true ) {
256	$post = $this->post;
257
258	$content = get_post_field( 'post_content', $post );
259
260	$filtered_content = apply_filters( 'the_content', $content );
261	$filtered_content = apply_filters( 'activitypub_the_content', $filtered_content, $this->post );
262
263	$decoded_content = html_entity_decode( $filtered_content, ENT_QUOTES, 'UTF-8' );
264
265	$allowed_html = apply_filters( 'activitypub_allowed_html', '<a><p>' );
266
267	return trim( preg_replace( '/[\r\n]{2,}/', '', strip_tags( $decoded_content, $allowed_html) ) );
268	}
269
270	/**
271	* Get the excerpt for a post for use outside of the loop.
272	*
273	* @param int Optional excerpt length.
274	*
275	* @return string The excerpt.
276	*/
277	public function get_the_post_summary( $summary_length = 400 ) {
278	$summary = $this->get_the_post_excerpt( $summary_length );
279
280	$filtered_summary = apply_filters( 'the_excerpt', $summary );
281	$filtered_summary = apply_filters( 'activitypub_the_summary', $filtered_summary, $this->post );
282
283	$decoded_summary = html_entity_decode( $filtered_summary, ENT_QUOTES, 'UTF-8' );
284
285	$allowed_html = apply_filters( 'activitypub_allowed_html', '<a><p>' );
286
287	return trim( preg_replace( '/[\r\n]{2,}/', '', strip_tags( $decoded_summary, $allowed_html) ) );
288	}
289
290	public static function add_backlink( $content, $post ) {
291	$link = '';
292
293	if ( get_option( 'activitypub_use_shortlink', 0 ) ) {
294	$link = esc_url( wp_get_shortlink( $post->ID ) );
295	} else {
296	$link = esc_url( get_permalink( $post->ID ) );
297	}
298
299	return $content . '<p><a href="' . $link . '">' . $link . '</a></p>';
300	}
301	}
302