rss.php in Gutenberg 23.2.0, at build/scripts/block-library/rss.php

146 lines 4.5 KB Raw Download Zip

1	<?php
2	/**
3	* Server-side rendering of the `core/rss` block.
4	*
5	* @package WordPress
6	*/
7
8	/**
9	* Renders the `core/rss` block on server.
10	*
11	* @since 5.2.0
12	*
13	* @param array $attributes The block attributes.
14	*
15	* @return string Returns the block content with received rss items.
16	*/
17	function gutenberg_render_block_core_rss( $attributes ) {
18	if ( in_array( untrailingslashit( $attributes['feedURL'] ), array( site_url(), home_url() ), true ) ) {
19	return '<div class="components-placeholder"><div class="notice notice-error">' . __( 'Adding an RSS feed to this site’s homepage is not supported, as it could lead to a loop that slows down your site. Try using another block, like the <strong>Latest Posts</strong> block, to list posts from the site.' ) . '</div></div>';
20	}
21
22	$rss = fetch_feed( $attributes['feedURL'] );
23
24	if ( is_wp_error( $rss ) ) {
25	return '<div class="components-placeholder"><div class="notice notice-error"><strong>' . __( 'RSS Error:' ) . '</strong> ' . esc_html( $rss->get_error_message() ) . '</div></div>';
26	}
27
28	if ( ! $rss->get_item_quantity() ) {
29	return '<div class="components-placeholder"><div class="notice notice-error">' . __( 'An error has occurred, which probably means the feed is down. Try again later.' ) . '</div></div>';
30	}
31
32	$rss_items = $rss->get_items( 0, $attributes['itemsToShow'] );
33	$list_items = '';
34
35	$open_in_new_tab = ! empty( $attributes['openInNewTab'] );
36	$rel = ! empty( $attributes['rel'] ) ? trim( $attributes['rel'] ) : '';
37
38	$link_attributes = '';
39
40	if ( $open_in_new_tab ) {
41	$link_attributes .= ' target="_blank"';
42	}
43
44	if ( '' !== $rel ) {
45	$link_attributes .= ' rel="' . esc_attr( $rel ) . '"';
46	}
47
48	foreach ( $rss_items as $item ) {
49	$title = esc_html( trim( strip_tags( html_entity_decode( $item->get_title() ) ) ) );
50
51	if ( empty( $title ) ) {
52	$title = __( '(no title)' );
53	}
54	$link = $item->get_link();
55	$link = esc_url( $link );
56
57	if ( $link ) {
58	$title = "<a href='{$link}'{$link_attributes}>{$title}</a>";
59	}
60	$title = "<div class='wp-block-rss__item-title'>{$title}</div>";
61
62	$date_markup = '';
63	if ( ! empty( $attributes['displayDate'] ) ) {
64	$timestamp = $item->get_date( 'U' );
65
66	if ( $timestamp ) {
67	$gmt_offset = get_option( 'gmt_offset' );
68	$timestamp += (int) ( (float) $gmt_offset * HOUR_IN_SECONDS );
69
70	$date_markup = sprintf(
71	'<time datetime="%1$s" class="wp-block-rss__item-publish-date">%2$s</time> ',
72	esc_attr( date_i18n( 'c', $timestamp ) ),
73	esc_html( date_i18n( get_option( 'date_format' ), $timestamp ) )
74	);
75	}
76	}
77
78	$author = '';
79	if ( $attributes['displayAuthor'] ) {
80	$author = $item->get_author();
81	if ( is_object( $author ) ) {
82	$author = $author->get_name();
83	if ( ! empty( $author ) ) {
84	$author = '<span class="wp-block-rss__item-author">' . sprintf(
85	/* translators: byline. %s: author. */
86	__( 'by %s' ),
87	esc_html( strip_tags( $author ) )
88	) . '</span>';
89	}
90	}
91	}
92
93	$excerpt = '';
94	$description = $item->get_description();
95	if ( $attributes['displayExcerpt'] && ! empty( $description ) ) {
96	$excerpt = html_entity_decode( $description, ENT_QUOTES, get_option( 'blog_charset' ) );
97	$excerpt = esc_attr( wp_trim_words( $excerpt, $attributes['excerptLength'], ' […]' ) );
98
99	// Change existing [...] to […].
100	if ( '[...]' === substr( $excerpt, -5 ) ) {
101	$excerpt = substr( $excerpt, 0, -5 ) . '[…]';
102	}
103
104	$excerpt = '<div class="wp-block-rss__item-excerpt">' . esc_html( $excerpt ) . '</div>';
105	}
106
107	$list_items .= "<li class='wp-block-rss__item'>{$title}{$date_markup}{$author}{$excerpt}</li>";
108	}
109
110	$classnames = array();
111	if ( isset( $attributes['blockLayout'] ) && 'grid' === $attributes['blockLayout'] ) {
112	$classnames[] = 'is-grid';
113	}
114	if ( isset( $attributes['columns'] ) && 'grid' === $attributes['blockLayout'] ) {
115	$classnames[] = 'columns-' . $attributes['columns'];
116	}
117	if ( $attributes['displayDate'] ) {
118	$classnames[] = 'has-dates';
119	}
120	if ( $attributes['displayAuthor'] ) {
121	$classnames[] = 'has-authors';
122	}
123	if ( $attributes['displayExcerpt'] ) {
124	$classnames[] = 'has-excerpts';
125	}
126
127	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classnames ) ) );
128
129	return sprintf( '<ul %s>%s</ul>', $wrapper_attributes, $list_items );
130	}
131
132	/**
133	* Registers the `core/rss` block on server.
134	*
135	* @since 5.2.0
136	*/
137	function gutenberg_register_block_core_rss() {
138	register_block_type_from_metadata(
139	__DIR__ . '/rss',
140	array(
141	'render_callback' => 'gutenberg_render_block_core_rss',
142	)
143	);
144	}
145	add_action( 'init', 'gutenberg_register_block_core_rss', 20 );
146