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@tomfinitely
Created June 20, 2024 15:43
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Synchronize Reusable Blocks Between WordPress Multisite Subsites
/**
* Sync the reusable blocks between the sites of the multisite.
*
* @param int $post_id The post id.
* @param WP_Post $post The post object.
*/
add_action( 'publish_wp_block', 'slug_sync_reusable_blocks', 10, 2 );
function slug_sync_reusable_blocks( $post_id, $post ) {
// Check if the post already has a sync_hash or create one.
if ( get_post_meta( $post_id, 'sync_hash', true ) !== '' ) {
$sync_hash = get_post_meta( $post_id, 'sync_hash', true );
} else {
$sync_hash = uniqid( $post->post_title );
update_post_meta( $post_id, 'sync_hash', $sync_hash );
}
$current_site_id = get_current_blog_id();
// Get the site IDs.
$sites = get_sites(
[
'fields' => 'ids',
]
);
remove_action( 'publish_wp_block', 'slug_sync_reusable_blocks', 10 );
foreach ( $sites as $site_id ) {
if ( $current_site_id !== $site_id ) {
switch_to_blog( $site_id );
// Check if we already synced the block and only need to update it.
$existing_block_query = new WP_Query(
[
'post_type' => 'wp_block',
'no_found_rows' => true,
'update_post_meta_cache' => false,
'update_post_term_cache' => false,
'fields' => 'ids',
'meta_key' => 'sync_hash',
'meta_value' => $sync_hash,
'posts_per_page' => 1,
]
);
if ( $existing_block_query->have_posts() ) {
// Update the post.
$existing_post_id = $existing_block_query->posts[0];
wp_update_post(
[
'ID' => $existing_block_query->posts[0],
'post_content' => $post->post_content,
'post_title' => $post->post_title,
'post_status' => 'publish',
]
);
} else {
// Create the post if we do not have the block already.
wp_insert_post(
[
'post_type' => 'wp_block',
'post_content' => $post->post_content,
'post_title' => $post->post_title,
'post_status' => 'publish',
'meta_input' =>
[
'sync_hash' => $sync_hash,
],
]
);
}
restore_current_blog();
}
}
add_action( 'publish_wp_block', 'slug_sync_reusable_blocks', 10, 2 );
}
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