[Summary view] [Print] [Text view]

   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   * @since 5.2.0
  12   *
  13   * @global int $monthnum.
  14   * @global int $year.
  15   *
  16   * @param array $attributes The block attributes.
  17   *
  18   * @return string Returns the block content.
  19   */
  20  function render_block_core_calendar( $attributes ) {
  21      global $monthnum, $year;
  22  
  23      // Calendar shouldn't be rendered
  24      // when there are no published posts on the site.
  25      if ( ! block_core_calendar_has_published_posts() ) {
  26          if ( is_user_logged_in() ) {
  27              return '<div>' . __( 'The calendar block is hidden because there are no published posts.' ) . '</div>';
  28          }
  29          return '';
  30      }
  31  
  32      $previous_monthnum = $monthnum;
  33      $previous_year     = $year;
  34  
  35      if ( isset( $attributes['month'] ) && isset( $attributes['year'] ) ) {
  36          $permalink_structure = get_option( 'permalink_structure' );
  37          if (
  38              str_contains( $permalink_structure, '%monthnum%' ) &&
  39              str_contains( $permalink_structure, '%year%' )
  40          ) {
  41              $monthnum = $attributes['month'];
  42              $year     = $attributes['year'];
  43          }
  44      }
  45  
  46      $color_block_styles = array();
  47  
  48      // Text color.
  49      $preset_text_color          = array_key_exists( 'textColor', $attributes ) ? "var:preset|color|{$attributes['textColor']}" : null;
  50      $custom_text_color          = $attributes['style']['color']['text'] ?? null;
  51      $color_block_styles['text'] = $preset_text_color ? $preset_text_color : $custom_text_color;
  52  
  53      // Background Color.
  54      $preset_background_color          = array_key_exists( 'backgroundColor', $attributes ) ? "var:preset|color|{$attributes['backgroundColor']}" : null;
  55      $custom_background_color          = $attributes['style']['color']['background'] ?? null;
  56      $color_block_styles['background'] = $preset_background_color ? $preset_background_color : $custom_background_color;
  57  
  58      // Generate color styles and classes.
  59      $styles        = wp_style_engine_get_styles( array( 'color' => $color_block_styles ), array( 'convert_vars_to_classnames' => true ) );
  60      $inline_styles = empty( $styles['css'] ) ? '' : sprintf( ' style="%s"', esc_attr( $styles['css'] ) );
  61      $classnames    = empty( $styles['classnames'] ) ? '' : ' ' . esc_attr( $styles['classnames'] );
  62      if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
  63          $classnames .= ' has-link-color';
  64      }
  65      // Apply color classes and styles to the calendar.
  66      $calendar = str_replace( '<table', '<table' . $inline_styles, get_calendar( true, false ) );
  67      $calendar = str_replace( 'class="wp-calendar-table', 'class="wp-calendar-table' . $classnames, $calendar );
  68  
  69      $wrapper_attributes = get_block_wrapper_attributes();
  70      $output             = sprintf(
  71          '<div %1$s>%2$s</div>',
  72          $wrapper_attributes,
  73          $calendar
  74      );
  75  
  76      $monthnum = $previous_monthnum;
  77      $year     = $previous_year;
  78  
  79      return $output;
  80  }
  81  
  82  /**
  83   * Registers the `core/calendar` block on server.
  84   *
  85   * @since 5.2.0
  86   */
  87  function register_block_core_calendar() {
  88      register_block_type_from_metadata(
  89          __DIR__ . '/calendar',
  90          array(
  91              'render_callback' => 'render_block_core_calendar',
  92          )
  93      );
  94  }
  95  
  96  add_action( 'init', 'register_block_core_calendar' );
  97  
  98  /**
  99   * Returns whether or not there are any published posts.
 100   *
 101   * Used to hide the calendar block when there are no published posts.
 102   * This compensates for a known Core bug: https://core.trac.wordpress.org/ticket/12016
 103   *
 104   * @since 5.9.0
 105   *
 106   * @return bool Has any published posts or not.
 107   */
 108  function block_core_calendar_has_published_posts() {
 109      // Multisite already has an option that stores the count of the published posts.
 110      // Let's use that for multisites.
 111      if ( is_multisite() ) {
 112          return 0 < (int) get_option( 'post_count' );
 113      }
 114  
 115      // On single sites we try our own cached option first.
 116      $has_published_posts = get_option( 'wp_calendar_block_has_published_posts', null );
 117      if ( null !== $has_published_posts ) {
 118          return (bool) $has_published_posts;
 119      }
 120  
 121      // No cache hit, let's update the cache and return the cached value.
 122      return block_core_calendar_update_has_published_posts();
 123  }
 124  
 125  /**
 126   * Queries the database for any published post and saves
 127   * a flag whether any published post exists or not.
 128   *
 129   * @since 5.9.0
 130   *
 131   * @global wpdb $wpdb WordPress database abstraction object.
 132   *
 133   * @return bool Has any published posts or not.
 134   */
 135  function block_core_calendar_update_has_published_posts() {
 136      global $wpdb;
 137      $has_published_posts = (bool) $wpdb->get_var( "SELECT 1 as test FROM {$wpdb->posts} WHERE post_type = 'post' AND post_status = 'publish' LIMIT 1" );
 138      update_option( 'wp_calendar_block_has_published_posts', $has_published_posts );
 139      return $has_published_posts;
 140  }
 141  
 142  // We only want to register these functions and actions when
 143  // we are on single sites. On multi sites we use `post_count` option.
 144  if ( ! is_multisite() ) {
 145      /**
 146       * Handler for updating the has published posts flag when a post is deleted.
 147       *
 148       * @since 5.9.0
 149       *
 150       * @param int $post_id Deleted post ID.
 151       */
 152      function block_core_calendar_update_has_published_post_on_delete( $post_id ) {
 153          $post = get_post( $post_id );
 154  
 155          if ( ! $post || 'publish' !== $post->post_status || 'post' !== $post->post_type ) {
 156              return;
 157          }
 158  
 159          block_core_calendar_update_has_published_posts();
 160      }
 161  
 162      /**
 163       * Handler for updating the has published posts flag when a post status changes.
 164       *
 165       * @since 5.9.0
 166       *
 167       * @param string  $new_status The status the post is changing to.
 168       * @param string  $old_status The status the post is changing from.
 169       * @param WP_Post $post       Post object.
 170       */
 171      function block_core_calendar_update_has_published_post_on_transition_post_status( $new_status, $old_status, $post ) {
 172          if ( $new_status === $old_status ) {
 173              return;
 174          }
 175  
 176          if ( 'post' !== get_post_type( $post ) ) {
 177              return;
 178          }
 179  
 180          if ( 'publish' !== $new_status && 'publish' !== $old_status ) {
 181              return;
 182          }
 183  
 184          block_core_calendar_update_has_published_posts();
 185      }
 186  
 187      add_action( 'delete_post', 'block_core_calendar_update_has_published_post_on_delete' );
 188      add_action( 'transition_post_status', 'block_core_calendar_update_has_published_post_on_transition_post_status', 10, 3 );
 189  }