level/index.js

const { nanoid } = require('nanoid')

const US_LIQUID_GALLONS_TO_CUBIC_INCHES = 231
const CUBIC_INCHES_TO_US_LIQUID_GALLONS = 1 / US_LIQUID_GALLONS_TO_CUBIC_INCHES

const toLiquid = cubicInches => cubicInches * CUBIC_INCHES_TO_US_LIQUID_GALLONS
const fromLiquid = gallons => gallons * US_LIQUID_GALLONS_TO_CUBIC_INCHES

const makeContainerT = (inputs, outputs, container) => [
    inputs,
    outputs,
    container,
]

const fromConfig = {
    tank_1: {
        inputs: [1],
        outputs: ['foo'],
        dims: { l: 24, w: 12, h: 12 },
    },
    sump_1: {
        inputs: [],
        outputs: [],
        dims: { l: 18, w: 12, h: 12 },
    },
    ato_1: {
        inputs: [],
        outputs: [],
        dims: { l: 6, w: 12, h: 12 },
    },
}
const digestConfig = config => {
    const sys = new System()
    for (const [containerName, inputsOutputsDims] of Object.entries(config)) {
        const { inputs, outputs, dims } = inputsOutputsDims
        const containerT = makeContainerT(
            inputs,
            outputs,
            new Container(dims, 0, containerName)
        )
        sys.add(containerT[2].id, containerT)
    }
    return sys
}

class InOut {
    constructor() {
        this.value = null
    }
}

/** Holds systems or containers */
class Controller {}

/** Holds systems or containers */
class System {
    constructor() {
        this.inventory = {}
    }
    get inputs() {
        return Object.values(this.inventory).map(containerT => containerT[0])
    }
    get outputs() {
        return Object.values(this.inventory).map(containerT => containerT[1])
    }
    get containers() {
        return Object.values(this.inventory).map(containerT => containerT[2])
    }
    add(id, containerT) {
        this.inventory[id] = containerT
    }
    inputsFor({ id }) {
        return Object.values(this.inventory).find(
            containerT => containerT[2].id == id
        )[0]
    }
    outputsFor({ id }) {
        return Object.values(this.inventory).find(
            containerT => containerT[2].id == id
        )[1]
    }
}

class Container {
    constructor({ l, w, h }, level = 0, label) {
        this._id = nanoid() //=> "V1StGXR8_Z5jdHi6B-myT"
        this._label = label ? label : ''
        this.l = l
        this.w = w
        this.h = h
        this.level = level
    }
    get id() {
        return this._id
    }
    get label() {
        return this._label
    }
    get liquidVolumeCapacity() {
        return toLiquid(this.l * this.w * this.h)
    }
    get liquidVolumeFilled() {
        return toLiquid(this.l * this.w * this.level)
    }
    get liquidVolumeRemaining() {
        return this.liquidVolumeCapacity - this.liquidVolumeFilled
    }
    setLevel(updatedLevel) {
        this.level = updatedLevel
    }
}

const _changeLevel = (amount, container) => {
    const updatedLevel =
        fromLiquid(container.liquidVolumeFilled + amount) /
        container.l /
        container.w
    container.setLevel(updatedLevel)
}
const fill = ({ container, amount }) => _changeLevel(amount, container)
const drain = ({ container, amount }) => _changeLevel(-1 * amount, container)

mySystem = digestConfig(fromConfig)
const tanks = mySystem.containers
console.log('mySystem :>> ', mySystem.inventory)
console.log('tank :>> ', tanks[0].liquidVolumeCapacity)
console.log('tank :>> ', tanks[0].liquidVolumeFilled)
fill({ container: tanks[0], amount: 10 })
console.log('tank :>> ', tanks[0].liquidVolumeFilled)
console.log('refs intact?', mySystem.containers[0] === tanks[0])
drain({ container: tanks[0], amount: 3 })
console.log('tank :>> ', tanks[0].liquidVolumeFilled)
console.log('inputs :>> ', mySystem.inputsFor(tanks[0]))
console.log('outputs :>> ', mySystem.outputsFor(tanks[0]))