level/src/channel.js

/**
 * @type {Reading}
 */
class Reading {
    constructor({ onRead, unit, min, max }) {
        this._val = onRead
        this.unit = unit
        this.max = max
        this.min = min
        this.created = Date.now()
    }
    /**
     * Reach out and grabs the value
     * from some sensor
     */
    get val() {
        return this._val()
    }
}

/**
 * @type {Channel}
 */
class Channel {
    constructor({ interval = 1, reader = null }) {
        this._interval = interval
        this._reader = reader
    }
    get interval() {
        return this._interval
    }
    get val() {
        return this._reader.val
    }
    get unit() {
        return this._reader.unit
    }
    get aboveRange() {
        return this._reader.val > this._reader.max
    }
    get belowRange() {
        return this._reader.val < this._reader.min
    }
    get inRange() {
        return this._reader.val && !this.aboveRange && !this.belowRange
            ? true
            : false
    }
    /** Always return a new Reading instance with new Channel instances */
    update() {
        const reader = new Reading({
            // !: Setup the callback to return a sensor value
            onRead: this._reader._val,
            unit: this._reader.unit,
            max: this._reader.max,
            min: this._reader.min,
        })

        const chan = new Channel({ interval: this.interval, reader })
        return chan
    }
}

export { Channel, Reading }