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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 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 ( ! 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 strpos( $permalink_structure, '%monthnum%' ) !== false && 34 strpos( $permalink_structure, '%year%' ) !== false 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 $wrapper_attributes = get_block_wrapper_attributes(); 44 $output = sprintf( 45 '<div %1$s>%2$s</div>', 46 $wrapper_attributes, 47 get_calendar( true, false ) 48 ); 49 50 // phpcs:ignore WordPress.WP.GlobalVariablesOverride.OverrideProhibited 51 $monthnum = $previous_monthnum; 52 // phpcs:ignore WordPress.WP.GlobalVariablesOverride.OverrideProhibited 53 $year = $previous_year; 54 55 return $output; 56 } 57 58 /** 59 * Registers the `core/calendar` block on server. 60 */ 61 function register_block_core_calendar() { 62 register_block_type_from_metadata( 63 __DIR__ . '/calendar', 64 array( 65 'render_callback' => 'render_block_core_calendar', 66 ) 67 ); 68 } 69 70 add_action( 'init', 'register_block_core_calendar' ); 71 72 /** 73 * Returns whether or not there are any published posts. 74 * 75 * Used to hide the calendar block when there are no published posts. 76 * This compensates for a known Core bug: https://core.trac.wordpress.org/ticket/12016 77 * 78 * @return bool Has any published posts or not. 79 */ 80 function block_core_calendar_has_published_posts() { 81 // Multisite already has an option that stores the count of the published posts. 82 // Let's use that for multisites. 83 if ( is_multisite() ) { 84 return 0 < (int) get_option( 'post_count' ); 85 } 86 87 // On single sites we try our own cached option first. 88 $has_published_posts = get_option( 'wp_calendar_block_has_published_posts', null ); 89 if ( null !== $has_published_posts ) { 90 return (bool) $has_published_posts; 91 } 92 93 // No cache hit, let's update the cache and return the cached value. 94 return block_core_calendar_update_has_published_posts(); 95 } 96 97 /** 98 * Queries the database for any published post and saves 99 * a flag whether any published post exists or not. 100 * 101 * @return bool Has any published posts or not. 102 */ 103 function block_core_calendar_update_has_published_posts() { 104 global $wpdb; 105 $has_published_posts = (bool) $wpdb->get_var( "SELECT 1 as test FROM {$wpdb->posts} WHERE post_type = 'post' AND post_status = 'publish' LIMIT 1" ); 106 update_option( 'wp_calendar_block_has_published_posts', $has_published_posts ); 107 return $has_published_posts; 108 } 109 110 // We only want to register these functions and actions when 111 // we are on single sites. On multi sites we use `post_count` option. 112 if ( ! is_multisite() ) { 113 /** 114 * Handler for updating the has published posts flag when a post is deleted. 115 * 116 * @param int $post_id Deleted post ID. 117 */ 118 function block_core_calendar_update_has_published_post_on_delete( $post_id ) { 119 $post = get_post( $post_id ); 120 121 if ( ! $post || 'publish' !== $post->post_status || 'post' !== $post->post_type ) { 122 return; 123 } 124 125 block_core_calendar_update_has_published_posts(); 126 } 127 128 /** 129 * Handler for updating the has published posts flag when a post status changes. 130 * 131 * @param string $new_status The status the post is changing to. 132 * @param string $old_status The status the post is changing from. 133 * @param WP_Post $post Post object. 134 */ 135 function block_core_calendar_update_has_published_post_on_transition_post_status( $new_status, $old_status, $post ) { 136 if ( $new_status === $old_status ) { 137 return; 138 } 139 140 if ( 'post' !== get_post_type( $post ) ) { 141 return; 142 } 143 144 if ( 'publish' !== $new_status && 'publish' !== $old_status ) { 145 return; 146 } 147 148 block_core_calendar_update_has_published_posts(); 149 } 150 151 add_action( 'delete_post', 'block_core_calendar_update_has_published_post_on_delete' ); 152 add_action( 'transition_post_status', 'block_core_calendar_update_has_published_post_on_transition_post_status', 10, 3 ); 153 }
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