source type

interface DepartMember {
  accountId: string;
  name: string;
  phone: string;
  deptNames: string[];
  deptIds: string[];
  role: number;
}

target type

export interface DepartMemberView extends Omit<DepartMember, 'role' | 'deptNames'> {
  role: string;
  _role?: DepartMember['role'];
  deptNames: string;
  _deptNames?: DepartMember['role'];
}

How can I define some TS code to auto convert source type to target type