import { Md5 } from 'ts-md5';

export class HashHelper {
  public static fromObject(obj: any | null): string | null {
    if (!obj) {
      return null;
    }

    if (obj instanceof Array) {
      const strs: Array<string | null> = (obj as Array<any>).map((x) =>
        this.fromObject(x)
      );

      return new Md5().appendStr(strs.join('')).end().toString();
    }

    if (typeof obj === 'number') {
      return new Md5().appendStr(obj.toString()).end().toString();
    }

    if (typeof obj === 'string') {
      return new Md5().appendStr(obj).end().toString();
    }

    const keys: Array<string> = Object.keys(obj);

    const str: string = keys
      .map((key: string) => this.fromObject(obj[key]))
      .join('');

    return new Md5().appendStr(str).end().toString();
  }
}