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<?php |
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/** |
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* Basic methods implemented by Jetpack Sync extensions |
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*/ |
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abstract class Jetpack_Sync_Module { |
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const ARRAY_CHUNK_SIZE = 10; |
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abstract public function name(); |
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public function get_object_by_id( $object_type, $id ) { |
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return false; |
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} |
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// override these to set up listeners and set/reset data/defaults |
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public function init_listeners( $callable ) { |
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} |
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public function init_full_sync_listeners( $callable ) { |
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} |
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public function init_before_send() { |
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} |
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public function set_defaults() { |
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} |
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public function reset_data() { |
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} |
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public function enqueue_full_sync_actions( $config, $max_items_to_enqueue, $state ) { |
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// in subclasses, return the number of actions enqueued, and next module state (true == done) |
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return array( 0, true ); |
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} |
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public function estimate_full_sync_actions( $config ) { |
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// in subclasses, return the number of items yet to be enqueued |
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return 0; |
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} |
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public function get_full_sync_actions() { |
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return array(); |
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} |
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protected function count_actions( $action_names, $actions_to_count ) { |
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return count( array_intersect( $action_names, $actions_to_count ) ); |
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} |
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protected function get_check_sum( $values ) { |
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return crc32( json_encode( $values ) ); |
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} |
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protected function still_valid_checksum( $sums_to_check, $name, $new_sum ) { |
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if ( isset( $sums_to_check[ $name ] ) && $sums_to_check[ $name ] === $new_sum ) { |
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return true; |
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} |
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return false; |
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} |
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protected function enqueue_all_ids_as_action( $action_name, $table_name, $id_field, $where_sql, $max_items_to_enqueue, $state ) { |
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global $wpdb; |
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if ( ! $where_sql ) { |
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$where_sql = '1 = 1'; |
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} |
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$items_per_page = 1000; |
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$page = 1; |
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$chunk_count = 0; |
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$previous_max_id = $state ? $state : '~0'; |
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$listener = Jetpack_Sync_Listener::get_instance(); |
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// count down from max_id to min_id so we get newest posts/comments/etc first |
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while ( $ids = $wpdb->get_col( "SELECT {$id_field} FROM {$table_name} WHERE {$where_sql} AND {$id_field} < {$previous_max_id} ORDER BY {$id_field} DESC LIMIT {$items_per_page}" ) ) { |
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// Request posts in groups of N for efficiency |
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$chunked_ids = array_chunk( $ids, self::ARRAY_CHUNK_SIZE ); |
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// if we hit our row limit, process and return |
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if ( $chunk_count + count( $chunked_ids ) >= $max_items_to_enqueue ) { |
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$remaining_items_count = $max_items_to_enqueue - $chunk_count; |
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$remaining_items = array_slice( $chunked_ids, 0, $remaining_items_count ); |
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$listener->bulk_enqueue_full_sync_actions( $action_name, $remaining_items ); |
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$last_chunk = end( $remaining_items ); |
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return array( $remaining_items_count + $chunk_count, end( $last_chunk ) ); |
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} |
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$listener->bulk_enqueue_full_sync_actions( $action_name, $chunked_ids ); |
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$chunk_count += count( $chunked_ids ); |
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$page += 1; |
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$previous_max_id = end( $ids ); |
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} |
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return array( $chunk_count, true ); |
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} |
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protected function get_metadata( $ids, $meta_type, $meta_key_whitelist ) { |
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global $wpdb; |
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$table = _get_meta_table( $meta_type ); |
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$id = $meta_type . '_id'; |
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if ( ! $table ) { |
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return array(); |
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} |
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$private_meta_whitelist_sql = "'" . implode( "','", array_map( 'esc_sql', $meta_key_whitelist ) ) . "'"; |
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return array_map( |
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array( $this, 'unserialize_meta' ), |
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$wpdb->get_results( |
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"SELECT $id, meta_key, meta_value, meta_id FROM $table WHERE $id IN ( " . implode( ',', wp_parse_id_list( $ids ) ) . ' )'. |
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" AND meta_key IN ( $private_meta_whitelist_sql ) " |
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, OBJECT ) |
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); |
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} |
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protected function get_term_relationships( $ids ) { |
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global $wpdb; |
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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 ); |
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} |
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public function unserialize_meta( $meta ) { |
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$meta->meta_value = maybe_unserialize( $meta->meta_value ); |
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return $meta; |
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} |
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public function get_objects_by_id( $object_type, $ids ) { |
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if ( empty( $ids ) || empty( $object_type ) ) { |
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return array(); |
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} |
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$objects = array(); |
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foreach( (array) $ids as $id ) { |
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$object = $this->get_object_by_id( $object_type, $id ); |
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// Only add object if we have the object. |
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if ( $object ) { |
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$objects[ $id ] = $object; |
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} |
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} |
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return $objects; |
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} |
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} |
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Automattic /
jetpack
