Function composeOperations

packages/core/src/engine/ot/compose.ts:28–47

(operations: IOperation[])

 * @param operations Operations Array
 */
export function composeOperations(operations: IOperation[]): IOperation[] {
  return operations.reduce<IOperation[]>((pre, cur) => {
    delete cur.resourceType;
    delete cur.revision;
    delete cur.fieldTypeMap;
    if (pre.length) {
      const preOp = pre.pop();
      const { operation, isComposed } = composeOperation(cur, preOp!);
      if (operation != null) {
        pre.push(operation);
        if (!isComposed) {
          pre.push(cur);
        }
      }
    } else {
      pre.push(cur);
    }
    return pre;
  }, []);
}

export function composeOperation(preOperation: IOperation, curOperation: IOperation): { operation: IOperation | null; isComposed: boolean } {
  if (