activitypub / includes / model / class-post.php

class-post.php in ActivityPub 0.9.0, at includes/model/class-post.php

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1	<?php
2	namespace Activitypub\Model;
3
4	/**
5	* ActivityPub Post Class
6	*
7	* @author Matthias Pfefferle
8	*/
9	class Post {
10	private $post;
11
12	/**
13	* Initialize the class, registering WordPress hooks
14	*/
15	public static function init() {
16	\add_filter( 'activitypub_the_summary', array( '\Activitypub\Model\Post', 'add_backlink_to_content' ), 15, 2 );
17	\add_filter( 'activitypub_the_content', array( '\Activitypub\Model\Post', 'add_backlink_to_content' ), 15, 2 );
18	}
19
20	public function __construct( $post = null ) {
21	$this->post = \get_post( $post );
22	}
23
24	public function get_post() {
25	return $this->post;
26	}
27
28	public function get_post_author() {
29	return $this->post->post_author;
30	}
31
32	public function to_array() {
33	$post = $this->post;
34
35	$array = array(
36	'id' => \get_permalink( $post ),
37	'type' => $this->get_object_type(),
38	'published' => \date( 'Y-m-d\TH:i:s\Z', \strtotime( $post->post_date ) ),
39	'attributedTo' => \get_author_posts_url( $post->post_author ),
40	'summary' => $this->get_the_summary(),
41	'inReplyTo' => null,
42	'content' => $this->get_the_content(),
43	'contentMap' => array(
44	\strstr( \get_locale(), '_', true ) => $this->get_the_content(),
45	),
46	'to' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
47	'cc' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
48	'attachment' => $this->get_attachments(),
49	'tag' => $this->get_tags(),
50	);
51
52	return \apply_filters( 'activitypub_post', $array );
53	}
54
55	public function to_json() {
56	return \wp_json_encode( $this->to_array(), JSON_HEX_TAG \| JSON_HEX_AMP \| JSON_HEX_QUOT );
57	}
58
59	public function get_attachments() {
60	$max_images = \apply_filters( 'activitypub_max_images', 3 );
61
62	$images = array();
63
64	// max images can't be negative or zero
65	if ( $max_images <= 0 ) {
66	$max_images = 1;
67	}
68
69	$id = $this->post->ID;
70
71	$image_ids = array();
72	// list post thumbnail first if this post has one
73	if ( \function_exists( 'has_post_thumbnail' ) && \has_post_thumbnail( $id ) ) {
74	$image_ids[] = \get_post_thumbnail_id( $id );
75	$max_images--;
76	}
77	// then list any image attachments
78	$query = new \WP_Query(
79	array(
80	'post_parent' => $id,
81	'post_status' => 'inherit',
82	'post_type' => 'attachment',
83	'post_mime_type' => 'image',
84	'order' => 'ASC',
85	'orderby' => 'menu_order ID',
86	'posts_per_page' => $max_images,
87	)
88	);
89	foreach ( $query->get_posts() as $attachment ) {
90	if ( ! \in_array( $attachment->ID, $image_ids, true ) ) {
91	$image_ids[] = $attachment->ID;
92	}
93	}
94
95	$image_ids = \array_unique( $image_ids );
96
97	// get URLs for each image
98	foreach ( $image_ids as $id ) {
99	$thumbnail = \wp_get_attachment_image_src( $id, 'full' );
100	$mimetype = \get_post_mime_type( $id );
101
102	if ( $thumbnail ) {
103	$images[] = array(
104	'url' => $thumbnail[0],
105	'type' => $mimetype,
106	);
107	}
108	}
109
110	$attachments = array();
111
112	// add attachments
113	if ( $images ) {
114	foreach ( $images as $image ) {
115	$attachment = array(
116	'type' => 'Image',
117	'url' => $image['url'],
118	'mediaType' => $image['type'],
119	);
120	$attachments[] = $attachment;
121	}
122	}
123
124	return $attachments;
125	}
126
127	public function get_tags() {
128	$tags = array();
129
130	$post_tags = \get_the_tags( $this->post->ID );
131	if ( $post_tags ) {
132	foreach ( $post_tags as $post_tag ) {
133	$tag = array(
134	'type' => 'Hashtag',
135	'href' => \get_tag_link( $post_tag->term_id ),
136	'name' => '#' . $post_tag->slug,
137	);
138	$tags[] = $tag;
139	}
140	}
141
142	return $tags;
143	}
144
145	/**
146	* Returns the as2 object-type for a given post
147	*
148	* @param string $type the object-type
149	* @param Object $post the post-object
150	*
151	* @return string the object-type
152	*/
153	public function get_object_type() {
154	if ( 'wordpress-post-format' !== \get_option( 'activitypub_object_type', 'note' ) ) {
155	return \ucfirst( \get_option( 'activitypub_object_type', 'note' ) );
156	}
157
158	$post_type = \get_post_type( $this->post );
159	switch ( $post_type ) {
160	case 'post':
161	$post_format = \get_post_format( $this->post );
162	switch ( $post_format ) {
163	case 'aside':
164	case 'status':
165	case 'quote':
166	case 'note':
167	$object_type = 'Note';
168	break;
169	case 'gallery':
170	case 'image':
171	$object_type = 'Image';
172	break;
173	case 'video':
174	$object_type = 'Video';
175	break;
176	case 'audio':
177	$object_type = 'Audio';
178	break;
179	default:
180	$object_type = 'Article';
181	break;
182	}
183	break;
184	case 'page':
185	$object_type = 'Page';
186	break;
187	case 'attachment':
188	$mime_type = \get_post_mime_type();
189	$media_type = \preg_replace( '/(\/[a-zA-Z]+)/i', '', $mime_type );
190	switch ( $media_type ) {
191	case 'audio':
192	$object_type = 'Audio';
193	break;
194	case 'video':
195	$object_type = 'Video';
196	break;
197	case 'image':
198	$object_type = 'Image';
199	break;
200	}
201	break;
202	default:
203	$object_type = 'Article';
204	break;
205	}
206
207	return $object_type;
208	}
209
210	public function get_the_content() {
211	if ( 'excerpt' === \get_option( 'activitypub_post_content_type', 'content' ) ) {
212	return $this->get_the_post_summary();
213	}
214
215	return $this->get_the_post_content();
216	}
217
218	public function get_the_summary() {
219	if ( 'Article' === $this->get_object_type() ) {
220	$excerpt = $this->get_the_post_excerpt( 400 );
221
222	return \html_entity_decode( $excerpt, ENT_QUOTES, 'UTF-8' );
223	}
224
225	return null;
226	}
227
228	/**
229	* Get the excerpt for a post for use outside of the loop.
230	*
231	* @param int Optional excerpt length.
232	*
233	* @return string The excerpt.
234	*/
235	public function get_the_post_excerpt( $excerpt_length = 400 ) {
236	$post = $this->post;
237
238	$excerpt = \get_post_field( 'post_excerpt', $post );
239
240	if ( '' === $excerpt ) {
241
242	$content = \get_post_field( 'post_content', $post );
243
244	// An empty string will make wp_trim_excerpt do stuff we do not want.
245	if ( '' !== $content ) {
246
247	$excerpt = \strip_shortcodes( $content );
248
249	/** This filter is documented in wp-includes/post-template.php */
250	$excerpt = \apply_filters( 'the_content', $excerpt );
251	$excerpt = \str_replace( ']]>', ']]>', $excerpt );
252
253	$excerpt_length = \apply_filters( 'excerpt_length', $excerpt_length );
254
255	/** This filter is documented in wp-includes/formatting.php */
256	$excerpt_more = \apply_filters( 'excerpt_more', ' [...]' );
257
258	$excerpt = \wp_trim_words( $excerpt, $excerpt_length, $excerpt_more );
259	}
260	}
261
262	return $excerpt;
263	}
264
265	/**
266	* Get the content for a post for use outside of the loop.
267	*
268	* @return string The content.
269	*/
270	public function get_the_post_content() {
271	$post = $this->post;
272
273	$content = \get_post_field( 'post_content', $post );
274
275	$filtered_content = \apply_filters( 'the_content', $content );
276	$filtered_content = \apply_filters( 'activitypub_the_content', $filtered_content, $this->post );
277
278	$decoded_content = \html_entity_decode( $filtered_content, ENT_QUOTES, 'UTF-8' );
279
280	$allowed_html = \apply_filters( 'activitypub_allowed_html', '<a><p><ul><ol><li><code><blockquote><pre>' );
281
282	return \trim( \preg_replace( '/[\r\n]{2,}/', '', \strip_tags( $decoded_content, $allowed_html ) ) );
283	}
284
285	/**
286	* Get the excerpt for a post for use outside of the loop.
287	*
288	* @param int Optional excerpt length.
289	*
290	* @return string The excerpt.
291	*/
292	public function get_the_post_summary( $summary_length = 400 ) {
293	$summary = $this->get_the_post_excerpt( $summary_length );
294
295	$filtered_summary = \apply_filters( 'the_excerpt', $summary );
296	$filtered_summary = \apply_filters( 'activitypub_the_summary', $filtered_summary, $this->post );
297
298	$decoded_summary = \html_entity_decode( $filtered_summary, ENT_QUOTES, 'UTF-8' );
299
300	$allowed_html = \apply_filters( 'activitypub_allowed_html', '<a><p>' );
301
302	return \trim( \preg_replace( '/[\r\n]{2,}/', '', \strip_tags( $decoded_summary, $allowed_html ) ) );
303	}
304
305	/**
306	* Adds a backlink to the post/summary content
307	*
308	* @param string $content
309	* @param WP_Post $post
310	*
311	* @return string
312	*/
313	public static function add_backlink_to_content( $content, $post ) {
314	$link = '';
315
316	if ( \get_option( 'activitypub_use_shortlink', 0 ) ) {
317	$link = \esc_url( \wp_get_shortlink( $post->ID ) );
318	} else {
319	$link = \esc_url( \get_permalink( $post->ID ) );
320	}
321
322	return $content . '<p><a href="' . $link . '">' . $link . '</a></p>';
323	}
324	}
325