import { Serializable } from '../classes/Serializable';

export class RenameColumn implements Serializable {
  public column: string;
  public new_name: string;

  public constructor (column: string, new_name = null) {
    if (new_name === null) {
      const regex = /(?<column>[a-z_]+) (?<new_name>[a-z_]+)/iu;
      const res = regex.exec (column);
      if (res === null || typeof res.groups === 'undefined')
        throw new Error ('invalid string to deserialize');

      this.column = res.groups.column;
      this.new_name = res.groups.new_name;
      return;
    }

    this.column = column;
    this.new_name = new_name as unknown as string;
  }

  public serialize (): string {
    return `${this.column} ${this.new_name}`;
  }
}