SRP_new1_updated.ts

class DailyAttendanceReport {
  public constructor(
    private reportGenerator: DailyAttendanceReportGenerator,
    private reportSender: DailyAttendanceReportSender
  ) {}

  public generate = () => {
    const report = this.reportGenerator.generate();
    this.reportSender.send(report);
  };
}

class DailyAttendanceReportGenerator {
  public constructor(private knex: Knex) {}

  public generate = () => {
    const since = moment()
      .subtract(1, "days")
      .startOf("day");
    const till = moment().startOf("day");
    return this.knex("daily_attendance")
      .column("DATE(inserted_at)", "COUNT(*)")
      .groupByRaw("DATE(inserted_at)")
      .where("inserted_at", ">=", since)
      .where("inserted_at", "<", till);
  };
}

class DailyAttendanceReportSender {
  public constructor(
    private knex: Knex,
    private viewRenderer: ViewRenderer,
    private emailTransport: EmailTransport
  ) {}

  public send = report => {
    const adminEmails = this.knex("users")
      .where({ team: "Marketing", role: "ADMIN" })
      .map(admin => admin.email);
    const emailBody = this.viewRenderer.render("daily_attendance_report", {
      report
    });
    adminEmails.forEach(adminEmail => {
      this.emailTransport.send(
        adminEmail,
        "Daily Attendance Report",
        emailBody
      );
    });
  };
}