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Editing: calendar.php
<?php /** * Server-side rendering of the `core/calendar` block. * * @package WordPress */ /** * Renders the `core/calendar` block on server. * * @since 5.2.0 * * @global int $monthnum. * @global int $year. * * @param array $attributes The block attributes. * * @return string Returns the block content. */ function render_block_core_calendar( $attributes ) { global $monthnum, $year; // Calendar shouldn't be rendered // when there are no published posts on the site. if ( ! block_core_calendar_has_published_posts() ) { if ( is_user_logged_in() ) { return '<div>' . __( 'The calendar block is hidden because there are no published posts.' ) . '</div>'; } return ''; } $previous_monthnum = $monthnum; $previous_year = $year; if ( isset( $attributes['month'] ) && isset( $attributes['year'] ) ) { $permalink_structure = get_option( 'permalink_structure' ); if ( str_contains( $permalink_structure, '%monthnum%' ) && str_contains( $permalink_structure, '%year%' ) ) { $monthnum = $attributes['month']; $year = $attributes['year']; } } $color_block_styles = array(); // Text color. $preset_text_color = array_key_exists( 'textColor', $attributes ) ? "var:preset|color|{$attributes['textColor']}" : null; $custom_text_color = $attributes['style']['color']['text'] ?? null; $color_block_styles['text'] = $preset_text_color ? $preset_text_color : $custom_text_color; // Background Color. $preset_background_color = array_key_exists( 'backgroundColor', $attributes ) ? "var:preset|color|{$attributes['backgroundColor']}" : null; $custom_background_color = $attributes['style']['color']['background'] ?? null; $color_block_styles['background'] = $preset_background_color ? $preset_background_color : $custom_background_color; // Generate color styles and classes. $styles = wp_style_engine_get_styles( array( 'color' => $color_block_styles ), array( 'convert_vars_to_classnames' => true ) ); $inline_styles = empty( $styles['css'] ) ? '' : sprintf( ' style="%s"', esc_attr( $styles['css'] ) ); $classnames = empty( $styles['classnames'] ) ? '' : ' ' . esc_attr( $styles['classnames'] ); if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) { $classnames .= ' has-link-color'; } // Apply color classes and styles to the calendar. $calendar = str_replace( '<table', '<table' . $inline_styles, get_calendar( true, false ) ); $calendar = str_replace( 'class="wp-calendar-table', 'class="wp-calendar-table' . $classnames, $calendar ); $wrapper_attributes = get_block_wrapper_attributes(); $output = sprintf( '<div %1$s>%2$s</div>', $wrapper_attributes, $calendar ); $monthnum = $previous_monthnum; $year = $previous_year; return $output; } /** * Registers the `core/calendar` block on server. * * @since 5.2.0 */ function register_block_core_calendar() { register_block_type_from_metadata( __DIR__ . '/calendar', array( 'render_callback' => 'render_block_core_calendar', ) ); } add_action( 'init', 'register_block_core_calendar' ); /** * Returns whether or not there are any published posts. * * Used to hide the calendar block when there are no published posts. * This compensates for a known Core bug: https://core.trac.wordpress.org/ticket/12016 * * @since 5.9.0 * * @return bool Has any published posts or not. */ function block_core_calendar_has_published_posts() { // Multisite already has an option that stores the count of the published posts. // Let's use that for multisites. if ( is_multisite() ) { return 0 < (int) get_option( 'post_count' ); } // On single sites we try our own cached option first. $has_published_posts = get_option( 'wp_calendar_block_has_published_posts', null ); if ( null !== $has_published_posts ) { return (bool) $has_published_posts; } // No cache hit, let's update the cache and return the cached value. return block_core_calendar_update_has_published_posts(); } /** * Queries the database for any published post and saves * a flag whether any published post exists or not. * * @since 5.9.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @return bool Has any published posts or not. */ function block_core_calendar_update_has_published_posts() { global $wpdb; $has_published_posts = (bool) $wpdb->get_var( "SELECT 1 as test FROM {$wpdb->posts} WHERE post_type = 'post' AND post_status = 'publish' LIMIT 1" ); update_option( 'wp_calendar_block_has_published_posts', $has_published_posts ); return $has_published_posts; } // We only want to register these functions and actions when // we are on single sites. On multi sites we use `post_count` option. if ( ! is_multisite() ) { /** * Handler for updating the has published posts flag when a post is deleted. * * @since 5.9.0 * * @param int $post_id Deleted post ID. */ function block_core_calendar_update_has_published_post_on_delete( $post_id ) { $post = get_post( $post_id ); if ( ! $post || 'publish' !== $post->post_status || 'post' !== $post->post_type ) { return; } block_core_calendar_update_has_published_posts(); } /** * Handler for updating the has published posts flag when a post status changes. * * @since 5.9.0 * * @param string $new_status The status the post is changing to. * @param string $old_status The status the post is changing from. * @param WP_Post $post Post object. */ function block_core_calendar_update_has_published_post_on_transition_post_status( $new_status, $old_status, $post ) { if ( $new_status === $old_status ) { return; } if ( 'post' !== get_post_type( $post ) ) { return; } if ( 'publish' !== $new_status && 'publish' !== $old_status ) { return; } block_core_calendar_update_has_published_posts(); } add_action( 'delete_post', 'block_core_calendar_update_has_published_post_on_delete' ); add_action( 'transition_post_status', 'block_core_calendar_update_has_published_post_on_transition_post_status', 10, 3 ); }
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