$listener->bulk_enqueue_full_sync_actions( $action_name, $chunked_ids_with_previous_end );

$chunk_count += count( $chunked_ids );
$page++;
// The $ids are ordered in descending order.
$previous_interval_end = end( $ids );
}

if ( $wpdb->last_error ) {
// return the values that were passed in so all these chunks get retried.
return array( $max_items_to_enqueue, $state );
}

return array( $chunk_count, true );
}

/**
* Given the Module Full Sync Configuration and Status return the next chunk of items to send.
*
* @param array $config This module Full Sync configuration.
* @param array $status This module Full Sync status.
* @param int $chunk_size Chunk size.
*
* @return array|object|null
*/
public function get_next_chunk( $config, $status, $chunk_size ) {
global $wpdb;
return $wpdb->get_col(
<<id_field()}
FROM {$wpdb->{$this->table_name()}}
WHERE {$this->get_where_sql( $config )}
AND {$this->id_field()} < {$status[‘last_sent’]} ORDER BY {$this->id_field()}
DESC LIMIT {$chunk_size}
SQL
);
}

/**
* Return the initial last sent object.
*
* @return string|array initial status.
*/
public function get_initial_last_sent() {
return ‘~0’;
}

/**
* Immediately send all items of a sync type as an action.
*
* @access protected
*
* @param string $config Full sync configuration for this module.
* @param array $status the current module full sync status.
* @param float $send_until timestamp until we want this request to send full sync events.
*
* @return array Status, the module full sync status updated.
*/
public function send_full_sync_actions( $config, $status, $send_until ) {
global $wpdb;

if ( empty( $status[‘last_sent’] ) ) {
$status[‘last_sent’] = $this->get_initial_last_sent();
}

$limits = Settings::get_setting( ‘full_sync_limits’ )[ $this->name() ];

$chunks_sent = 0;
// phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition
while ( $objects = $this->get_next_chunk( $config, $status, $limits[‘chunk_size’] ) ) {
if ( $chunks_sent++ === $limits[‘max_chunks’] || microtime( true ) >= $send_until ) {
return $status;
}

$result = $this->send_action( ‘jetpack_full_sync_’ . $this->name(), array( $objects, $status[‘last_sent’] ) );

if ( is_wp_error( $result ) || $wpdb->last_error ) {
return $status;
}
// The $ids are ordered in descending order.
$status[‘last_sent’] = end( $objects );
$status[‘sent’] += count( $objects );
}

if ( ! $wpdb->last_error ) {
$status[‘finished’] = true;
}

return $status;
}

/**
* Immediately sends a single item without firing or enqueuing it
*
* @param string $action_name The action.
* @param array $data The data associated with the action.
*/
public function send_action( $action_name, $data = null ) {
$sender = Sender::get_instance();
return $sender->send_action( $action_name, $data );
}

/**
* Retrieve chunk IDs with previous interval end.
*
* @access protected
*
* @param array $chunks All remaining items.
* @param int $previous_interval_end The last item from the previous interval.
* @return array Chunk IDs with the previous interval end.
*/
protected function get_chunks_with_preceding_end( $chunks, $previous_interval_end ) {
$chunks_with_ends = array();
foreach ( $chunks as $chunk ) {
$chunks_with_ends[] = array(
‘ids’ => $chunk,
‘previous_end’ => $previous_interval_end,
);
// Chunks are ordered in descending order.
$previous_interval_end = end( $chunk );
}
return $chunks_with_ends;
}

/**
* Get metadata of a particular object type within the designated meta key whitelist.
*
* @access protected
*
* @todo Refactor to use $wpdb->prepare() on the SQL query.
*
* @param array $ids Object IDs.
* @param string $meta_type Meta type.
* @param array $meta_key_whitelist Meta key whitelist.
* @return array Unserialized meta values.
*/
protected function get_metadata( $ids, $meta_type, $meta_key_whitelist ) {
global $wpdb;
$table = _get_meta_table( $meta_type );
$id = $meta_type . ‘_id’;
if ( ! $table ) {
return array();
}

$private_meta_whitelist_sql = “‘” . implode( “‘,'”, array_map( ‘esc_sql’, $meta_key_whitelist ) ) . “‘”;

return array_map(
array( $this, ‘unserialize_meta’ ),
$wpdb->get_results(
// phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared, WordPress.DB.PreparedSQL.NotPrepared
“SELECT $id, meta_key, meta_value, meta_id FROM $table WHERE $id IN ( ” . implode( ‘,’, wp_parse_id_list( $ids ) ) . ‘ )’ .
” AND meta_key IN ( $private_meta_whitelist_sql ) “,
// phpcs:enable WordPress.DB.PreparedSQL.InterpolatedNotPrepared, WordPress.DB.PreparedSQL.NotPrepared
OBJECT
)
);
}

/**
* Initialize listeners for the particular meta type.
*
* @access public
*
* @param string $meta_type Meta type.
* @param callable $callable Action handler callable.
*/
public function init_listeners_for_meta_type( $meta_type, $callable ) {
add_action( “added_{$meta_type}_meta”, $callable, 10, 4 );
add_action( “updated_{$meta_type}_meta”, $callable, 10, 4 );
add_action( “deleted_{$meta_type}_meta”, $callable, 10, 4 );
}

/**
* Initialize meta whitelist handler for the particular meta type.
*
* @access public
*
* @param string $meta_type Meta type.
* @param callable $whitelist_handler Action handler callable.
*/
public function init_meta_whitelist_handler( $meta_type, $whitelist_handler ) {
add_filter( “jetpack_sync_before_enqueue_added_{$meta_type}_meta”, $whitelist_handler );
add_filter( “jetpack_sync_before_enqueue_updated_{$meta_type}_meta”, $whitelist_handler );
add_filter( “jetpack_sync_before_enqueue_deleted_{$meta_type}_meta”, $whitelist_handler );
}

/**
* Retrieve the term relationships for the specified object IDs.
*
* @access protected
*
* @todo This feels too specific to be in the abstract sync Module class. Move it?
*
* @param array $ids Object IDs.
* @return array Term relationships – object ID and term taxonomy ID pairs.
*/
protected function get_term_relationships( $ids ) {
global $wpdb;

// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
return $wpdb->get_results( “SELECT object_id, term_taxonomy_id FROM $wpdb->term_relationships WHERE object_id IN ( ” . implode( ‘,’, wp_parse_id_list( $ids ) ) . ‘ )’, OBJECT );
}

/**
* Unserialize the value of a meta object, if necessary.
*
* @access public
*
* @param object $meta Meta object.
* @return object Meta object with possibly unserialized value.
*/
public function unserialize_meta( $meta ) {
$meta->meta_value = maybe_unserialize( $meta->meta_value );
return $meta;
}

/**
* Retrieve a set of objects by their IDs.
*
* @access public
*
* @param string $object_type Object type.
* @param array $ids Object IDs.
* @return array Array of objects.
*/
public function get_objects_by_id( $object_type, $ids ) {
if ( empty( $ids ) || empty( $object_type ) ) {
return array();
}

$objects = array();
foreach ( (array) $ids as $id ) {
$object = $this->get_object_by_id( $object_type, $id );

// Only add object if we have the object.
if ( $object ) {
$objects[ $id ] = $object;
}
}

return $objects;
}

/**
* Gets a list of minimum and maximum object ids for each batch based on the given batch size.
*
* @access public
*
* @param int $batch_size The batch size for objects.
* @param string|bool $where_sql The sql where clause minus ‘WHERE’, or false if no where clause is needed.
*
* @return array|bool An array of min and max ids for each batch. FALSE if no table can be found.
*/
public function get_min_max_object_ids_for_batches( $batch_size, $where_sql = false ) {
global $wpdb;

if ( ! $this->table_name() ) {
return false;
}

$results = array();
$table = $wpdb->{$this->table_name()};
$current_max = 0;
$current_min = 1;
$id_field = $this->id_field();
$replicastore = new Replicastore();

$total = $replicastore->get_min_max_object_id(
$id_field,
$table,
$where_sql,
false
);

while ( $total->max > $current_max ) {
$where = $where_sql ?
$where_sql . ” AND $id_field > $current_max” :
“$id_field > $current_max”;
$result = $replicastore->get_min_max_object_id(
$id_field,
$table,
$where,
$batch_size
);
if ( empty( $result->min ) && empty( $result->max ) ) {
// Our query produced no min and max. We can assume the min from the previous query,
// and the total max we found in the initial query.
$current_max = (int) $total->max;
$result = (object) array(
‘min’ => $current_min,
‘max’ => $current_max,
);
} else {
$current_min = (int) $result->min;
$current_max = (int) $result->max;
}
$results[] = $result;
}

return $results;
}

/**
* Return Total number of objects.
*
* @param array $config Full Sync config.
*
* @return int total
*/
public function total( $config ) {
global $wpdb;
$table = $wpdb->{$this->table_name()};
$where = $this->get_where_sql( $config );

// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
return $wpdb->get_var( “SELECT COUNT(*) FROM $table WHERE $where” );
}

/**
* Retrieve the WHERE SQL clause based on the module config.
*
* @access public
*
* @param array $config Full sync configuration for this sync module.
* @return string WHERE SQL clause, or `null` if no comments are specified in the module config.
*/
public function get_where_sql( $config ) {
return ‘1=1’;
}

}