gutenberg / build / block-library / blocks / calendar.php

calendar.php in Gutenberg 16.6.0, at build/block-library/blocks/calendar.php

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1	<?php
2	/**
3	* Server-side rendering of the `core/calendar` block.
4	*
5	* @package WordPress
6	*/
7
8	/**
9	* Renders the `core/calendar` block on server.
10	*
11	* @param array $attributes The block attributes.
12	*
13	* @return string Returns the block content.
14	*/
15	function gutenberg_render_block_core_calendar( $attributes ) {
16	global $monthnum, $year;
17
18	// Calendar shouldn't be rendered
19	// when there are no published posts on the site.
20	if ( ! gutenberg_block_core_calendar_has_published_posts() ) {
21	if ( is_user_logged_in() ) {
22	return '<div>' . __( 'The calendar block is hidden because there are no published posts.' ) . '</div>';
23	}
24	return '';
25	}
26
27	$previous_monthnum = $monthnum;
28	$previous_year = $year;
29
30	if ( isset( $attributes['month'] ) && isset( $attributes['year'] ) ) {
31	$permalink_structure = get_option( 'permalink_structure' );
32	if (
33	str_contains( $permalink_structure, '%monthnum%' ) &&
34	str_contains( $permalink_structure, '%year%' )
35	) {
36	// phpcs:ignore WordPress.WP.GlobalVariablesOverride.OverrideProhibited
37	$monthnum = $attributes['month'];
38	// phpcs:ignore WordPress.WP.GlobalVariablesOverride.OverrideProhibited
39	$year = $attributes['year'];
40	}
41	}
42
43	$color_block_styles = array();
44
45	// Text color.
46	$preset_text_color = array_key_exists( 'textColor', $attributes ) ? "var:preset\|color\|{$attributes['textColor']}" : null;
47	$custom_text_color = _wp_array_get( $attributes, array( 'style', 'color', 'text' ), null );
48	$color_block_styles['text'] = $preset_text_color ? $preset_text_color : $custom_text_color;
49
50	// Background Color.
51	$preset_background_color = array_key_exists( 'backgroundColor', $attributes ) ? "var:preset\|color\|{$attributes['backgroundColor']}" : null;
52	$custom_background_color = _wp_array_get( $attributes, array( 'style', 'color', 'background' ), null );
53	$color_block_styles['background'] = $preset_background_color ? $preset_background_color : $custom_background_color;
54
55	// Generate color styles and classes.
56	$styles = gutenberg_style_engine_get_styles( array( 'color' => $color_block_styles ), array( 'convert_vars_to_classnames' => true ) );
57	$inline_styles = empty( $styles['css'] ) ? '' : sprintf( ' style="%s"', esc_attr( $styles['css'] ) );
58	$classnames = empty( $styles['classnames'] ) ? '' : ' ' . esc_attr( $styles['classnames'] );
59	if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
60	$classnames .= ' has-link-color';
61	}
62	// Apply color classes and styles to the calendar.
63	$calendar = str_replace( '<table', '<table' . $inline_styles, get_calendar( true, false ) );
64	$calendar = str_replace( 'class="wp-calendar-table', 'class="wp-calendar-table' . $classnames, $calendar );
65
66	$wrapper_attributes = get_block_wrapper_attributes();
67	$output = sprintf(
68	'<div %1$s>%2$s</div>',
69	$wrapper_attributes,
70	$calendar
71	);
72
73	// phpcs:ignore WordPress.WP.GlobalVariablesOverride.OverrideProhibited
74	$monthnum = $previous_monthnum;
75	// phpcs:ignore WordPress.WP.GlobalVariablesOverride.OverrideProhibited
76	$year = $previous_year;
77
78	return $output;
79	}
80
81	/**
82	* Registers the `core/calendar` block on server.
83	*/
84	function gutenberg_register_block_core_calendar() {
85	register_block_type_from_metadata(
86	__DIR__ . '/calendar',
87	array(
88	'render_callback' => 'gutenberg_render_block_core_calendar',
89	)
90	);
91	}
92
93	add_action( 'init', 'gutenberg_register_block_core_calendar', 20 );
94
95	/**
96	* Returns whether or not there are any published posts.
97	*
98	* Used to hide the calendar block when there are no published posts.
99	* This compensates for a known Core bug: https://core.trac.wordpress.org/ticket/12016
100	*
101	* @return bool Has any published posts or not.
102	*/
103	function gutenberg_block_core_calendar_has_published_posts() {
104	// Multisite already has an option that stores the count of the published posts.
105	// Let's use that for multisites.
106	if ( is_multisite() ) {
107	return 0 < (int) get_option( 'post_count' );
108	}
109
110	// On single sites we try our own cached option first.
111	$has_published_posts = get_option( 'wp_calendar_block_has_published_posts', null );
112	if ( null !== $has_published_posts ) {
113	return (bool) $has_published_posts;
114	}
115
116	// No cache hit, let's update the cache and return the cached value.
117	return gutenberg_block_core_calendar_update_has_published_posts();
118	}
119
120	/**
121	* Queries the database for any published post and saves
122	* a flag whether any published post exists or not.
123	*
124	* @return bool Has any published posts or not.
125	*/
126	function gutenberg_block_core_calendar_update_has_published_posts() {
127	global $wpdb;
128	$has_published_posts = (bool) $wpdb->get_var( "SELECT 1 as test FROM {$wpdb->posts} WHERE post_type = 'post' AND post_status = 'publish' LIMIT 1" );
129	update_option( 'wp_calendar_block_has_published_posts', $has_published_posts );
130	return $has_published_posts;
131	}
132
133	// We only want to register these functions and actions when
134	// we are on single sites. On multi sites we use `post_count` option.
135	if ( ! is_multisite() ) {
136	/**
137	* Handler for updating the has published posts flag when a post is deleted.
138	*
139	* @param int $post_id Deleted post ID.
140	*/
141	function gutenberg_block_core_calendar_update_has_published_post_on_delete( $post_id ) {
142	$post = get_post( $post_id );
143
144	if ( ! $post \|\| 'publish' !== $post->post_status \|\| 'post' !== $post->post_type ) {
145	return;
146	}
147
148	gutenberg_block_core_calendar_update_has_published_posts();
149	}
150
151	/**
152	* Handler for updating the has published posts flag when a post status changes.
153	*
154	* @param string $new_status The status the post is changing to.
155	* @param string $old_status The status the post is changing from.
156	* @param WP_Post $post Post object.
157	*/
158	function gutenberg_block_core_calendar_update_has_published_post_on_transition_post_status( $new_status, $old_status, $post ) {
159	if ( $new_status === $old_status ) {
160	return;
161	}
162
163	if ( 'post' !== get_post_type( $post ) ) {
164	return;
165	}
166
167	if ( 'publish' !== $new_status && 'publish' !== $old_status ) {
168	return;
169	}
170
171	gutenberg_block_core_calendar_update_has_published_posts();
172	}
173
174	add_action( 'delete_post', 'gutenberg_block_core_calendar_update_has_published_post_on_delete' );
175	add_action( 'transition_post_status', 'gutenberg_block_core_calendar_update_has_published_post_on_transition_post_status', 10, 3 );
176	}
177