wongjiahau/ttap-web

const isEqual = require("lodash.isequal");
const isInt = require("validator/lib/isInt");
export class Week {
  public static Parse(s: string): Week {
    const result = new Array<number>();
    const tokens = s.split(",");
    tokens.forEach((t) => {
      if (isInt(t)) {
        result.push(parseInt(t, 10));
      } else {
        const toks = t.split("-");
        const first = parseInt(toks[0], 10);
        const last = parseInt(toks[1], 10);
        for (let i = first; i <= last; i++) {
          result.push(i);
        }
      }
    });
    return new Week(result);
  }

  public readonly BinaryData: number;
  public readonly WeekNumberList: number[];
  public constructor(weekNumberList: number[]) {
    this.WeekNumberList = weekNumberList;
    this.BinaryData = this.GenerateBinaryForm(weekNumberList);
  }

  public Equals(other: Week): boolean {
    return isEqual(this.WeekNumberList, other.WeekNumberList);
  }

  public IntersectWith(other: Week): boolean {
    return (this.BinaryData & other.BinaryData) > 0;
    // return intersection(this.WeekNumberList, other.WeekNumberList).length > 0;
  }

  private GenerateBinaryForm(weekNumberList: number[]): number {
    // 14 zeroes signifies 14 weeks
    const result = [
      "0",
      "0",
      "0",
      "0",
      "0",
      "0",
      "0",
      "0",
      "0",
      "0",
      "0",
      "0",
      "0",
      "0",
    ];
    weekNumberList.forEach((w) => {
      result[w - 1] = "1";
    });
    return parseInt(result.reverse().join(""), 2);
  }
}