Function computeAggregateVirtualProps

packages/db/src/virtual-props.ts:238–255

(
  rows: Array<Partial<VirtualRowProps<string | number>>>,
  groupKey: TKey,
  collectionId: string,
)

 * @internal
 */
export function computeAggregateVirtualProps<TKey extends string | number>(
  rows: Array<Partial<VirtualRowProps<string | number>>>,
  groupKey: TKey,
  collectionId: string,
): VirtualRowProps<TKey> {
  // $synced = true only if ALL rows are synced (false if ANY is optimistic)
  const allSynced = rows.every((row) => row.$synced ?? true)

  // $origin = 'local' if ANY row is local (consistent with "local influence" semantics)
  const hasLocal = rows.some((row) => row.$origin === 'local')

  return {
    $synced: allSynced,
    $origin: hasLocal ? 'local' : 'remote',
    $key: groupKey,
    $collectionId: collectionId,
  }
}

/**
 * List of virtual property names for iteration and checking.