ewelink-api/classes/PowerUsage/CurrentMonth.js

class CurrentMonth {
  /**
   * Return daily power usage
   *
   * @param hundredDaysKwhData
   *
   * @returns {{daily: *, monthly: *}}
   */
  static parse({ hundredDaysKwhData }) {
    const today = new Date();
    const days = today.getDate();

    let monthlyUsage = 0;
    const dailyUsage = [];

    for (let day = 0; day < days; day += 1) {
      const s = hundredDaysKwhData.substr(6 * day, 2);
      const c = hundredDaysKwhData.substr(6 * day + 2, 2);
      const f = hundredDaysKwhData.substr(6 * day + 4, 2);
      const h = parseInt(s, 16);
      const y = parseInt(c, 16);
      const I = parseInt(f, 16);
      const E = parseFloat(`${h}.${y}${I}`);

      dailyUsage.push({
        day: days - day,
        usage: E,
      });

      monthlyUsage += E;
    }

    return {
      monthly: monthlyUsage,
      daily: dailyUsage,
    };
  }
}

module.exports = CurrentMonth;