wordpress-seo / src / generators / schema / article.php

article.php in Yoast SEO – Advanced SEO with real-time guidance and built-in AI 18.1, at src/generators/schema/article.php

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1	<?php
2
3	namespace Yoast\WP\SEO\Generators\Schema;
4
5	use Yoast\WP\SEO\Config\Schema_IDs;
6
7	/**
8	* Returns schema Article data.
9	*/
10	class Article extends Abstract_Schema_Piece {
11
12	/**
13	* Determines whether or not a piece should be added to the graph.
14	*
15	* @return bool
16	*/
17	public function is_needed() {
18	if ( $this->context->indexable->object_type !== 'post' ) {
19	return false;
20	}
21
22	// If we cannot output a publisher, we shouldn't output an Article.
23	if ( $this->context->site_represents === false ) {
24	return false;
25	}
26
27	// If we cannot output an author, we shouldn't output an Article.
28	if ( ! $this->helpers->schema->article->is_author_supported( $this->context->indexable->object_sub_type ) ) {
29	return false;
30	}
31
32	if ( $this->context->schema_article_type !== 'None' ) {
33	$this->context->main_schema_id = $this->context->canonical . Schema_IDs::ARTICLE_HASH;
34
35	return true;
36	}
37
38	return false;
39	}
40
41	/**
42	* Returns Article data.
43	*
44	* @return array Article data.
45	*/
46	public function generate() {
47	$data = [
48	'@type' => $this->context->schema_article_type,
49	'@id' => $this->context->canonical . Schema_IDs::ARTICLE_HASH,
50	'isPartOf' => [ '@id' => $this->context->canonical . Schema_IDs::WEBPAGE_HASH ],
51	'author' => [ '@id' => $this->helpers->schema->id->get_user_schema_id( $this->context->post->post_author, $this->context ) ],
52	'headline' => $this->helpers->schema->html->smart_strip_tags( $this->helpers->post->get_post_title_with_fallback( $this->context->id ) ),
53	'datePublished' => $this->helpers->date->format( $this->context->post->post_date_gmt ),
54	'dateModified' => $this->helpers->date->format( $this->context->post->post_modified_gmt ),
55	'mainEntityOfPage' => [ '@id' => $this->context->canonical . Schema_IDs::WEBPAGE_HASH ],
56	'wordCount' => $this->word_count( $this->context->post->post_content, $this->context->post->post_title ),
57	];
58
59	if ( $this->context->post->comment_status === 'open' ) {
60	$data['commentCount'] = \intval( $this->context->post->comment_count, 10 );
61	}
62
63	if ( $this->context->site_represents_reference ) {
64	$data['publisher'] = $this->context->site_represents_reference;
65	}
66
67	$data = $this->add_image( $data );
68	$data = $this->add_keywords( $data );
69	$data = $this->add_sections( $data );
70	$data = $this->helpers->schema->language->add_piece_language( $data );
71
72	if ( \post_type_supports( $this->context->post->post_type, 'comments' ) && $this->context->post->comment_status === 'open' ) {
73	$data = $this->add_potential_action( $data );
74	}
75
76	return $data;
77	}
78
79	/**
80	* Adds tags as keywords, if tags are assigned.
81	*
82	* @param array $data Article data.
83	*
84	* @return array Article data.
85	*/
86	private function add_keywords( $data ) {
87	/**
88	* Filter: 'wpseo_schema_article_keywords_taxonomy' - Allow changing the taxonomy used to assign keywords to a post type Article data.
89	*
90	* @api string $taxonomy The chosen taxonomy.
91	*/
92	$taxonomy = \apply_filters( 'wpseo_schema_article_keywords_taxonomy', 'post_tag' );
93
94	return $this->add_terms( $data, 'keywords', $taxonomy );
95	}
96
97	/**
98	* Adds categories as sections, if categories are assigned.
99	*
100	* @param array $data Article data.
101	*
102	* @return array Article data.
103	*/
104	private function add_sections( $data ) {
105	/**
106	* Filter: 'wpseo_schema_article_sections_taxonomy' - Allow changing the taxonomy used to assign keywords to a post type Article data.
107	*
108	* @api string $taxonomy The chosen taxonomy.
109	*/
110	$taxonomy = \apply_filters( 'wpseo_schema_article_sections_taxonomy', 'category' );
111
112	return $this->add_terms( $data, 'articleSection', $taxonomy );
113	}
114
115	/**
116	* Adds a term or multiple terms, comma separated, to a field.
117	*
118	* @param array $data Article data.
119	* @param string $key The key in data to save the terms in.
120	* @param string $taxonomy The taxonomy to retrieve the terms from.
121	*
122	* @return mixed Article data.
123	*/
124	protected function add_terms( $data, $key, $taxonomy ) {
125	$terms = \get_the_terms( $this->context->id, $taxonomy );
126
127	if ( ! \is_array( $terms ) ) {
128	return $data;
129	}
130
131	$callback = static function( $term ) {
132	// We are using the WordPress internal translation.
133	return $term->name !== \__( 'Uncategorized', 'default' );
134	};
135	$terms = \array_filter( $terms, $callback );
136
137	if ( empty( $terms ) ) {
138	return $data;
139	}
140
141	$data[ $key ] = \wp_list_pluck( $terms, 'name' );
142
143	return $data;
144	}
145
146	/**
147	* Adds an image node if the post has a featured image.
148	*
149	* @param array $data The Article data.
150	*
151	* @return array The Article data.
152	*/
153	private function add_image( $data ) {
154	if ( $this->context->main_image_url !== null ) {
155	$data['image'] = [
156	'@id' => $this->context->canonical . Schema_IDs::PRIMARY_IMAGE_HASH,
157	];
158	$data['thumbnailUrl'] = $this->context->main_image_url;
159	}
160
161	return $data;
162	}
163
164	/**
165	* Adds the potential action property to the Article Schema piece.
166	*
167	* @param array $data The Article data.
168	*
169	* @return array The Article data with the potential action added.
170	*/
171	private function add_potential_action( $data ) {
172	/**
173	* Filter: 'wpseo_schema_article_potential_action_target' - Allows filtering of the schema Article potentialAction target.
174	*
175	* @api array $targets The URLs for the Article potentialAction target.
176	*/
177	$targets = \apply_filters( 'wpseo_schema_article_potential_action_target', [ $this->context->canonical . '#respond' ] );
178
179	$data['potentialAction'][] = [
180	'@type' => 'CommentAction',
181	'name' => 'Comment',
182	'target' => $targets,
183	];
184
185	return $data;
186	}
187
188	/**
189	* Does a simple word count but tries to be relatively smart about it.
190	*
191	* @param string $post_content The post content.
192	* @param string $post_title The post title.
193	*
194	* @return int The number of words in the content.
195	*/
196	private function word_count( $post_content, $post_title = '' ) {
197	// Add the title to our word count.
198	$post_content = $post_title . ' ' . $post_content;
199
200	// Strip pre/code blocks and their content.
201	$post_content = \preg_replace( '@<(pre\|code)[^>]?>.?</\\1>@si', '', $post_content );
202
203	// Strips all other tags.
204	$post_content = \wp_strip_all_tags( $post_content );
205
206	return \str_word_count( $post_content, 0 );
207	}
208	}
209