@trusthab/composable-resources/src/resources/kpi/zones_not_heating.js

migrating https://github.com/knetikmedia/hab-api/tree/integration/app/resources/composable

const composer = require('../../mixin_loader');

module.exports = (App) => {
  const { underscore } = require('inflected');

  class ZonesNotHeatingResource {
    static mixins() {
      return ['Kpi'];
    }

    getMetricId() {
      return 'zones_not_heating';
    }

    getMetricType() {
      return 'gauge';
    }

    getValue() {
      const { value, oldValue } = this.get('diff');
      const {
        device_type,
        climate_mode,
        heat_target
      } = this.get('obj');

      if (device_type !== 'thermostat') { return 0; }

      /*
       * Alert should trigger:
       *
       * IF Unit is set to climate mode=Heat
       *  AND Set Point is ABOVE Ambient Temperature (e.g. setpoint is 70, ambient temp is 65)
       *  IF Ambient Temperature has not gone up by a degree towards the setpoint after 30m
       *
       * OR ambient temperature drops
       */
      if (climate_mode === 'heat' || climate_mode === 'auto') {
        const currentValue = parseInt(value);
        const isSetPointAboveAmbientTemp = heat_target > currentValue;
        const isTempIncreasing = currentValue > oldValue;

        return isSetPointAboveAmbientTemp && !isTempIncreasing ? 1 : 0;
      }

      return 0;
    }
  }

  return composer(ZonesNotHeatingResource, App);
};