Amber Electricity Real-time price widget for iOS 14

// Change this to your postcode. Amber rates vary by region.
let postcode = "3089";

// Rest of this doesn't need to be changed unless you want to get your hands dirty

// Initialise variables. These will be set based on Amber API
var currentPrice = 0
var nextPrice = 0
var currentRenewables = 0

// API call to get prices for the provided postcode
let req = new Request("https://api.amberelectric.com.au/prices/listprices")
req.method = 'POST'
req.headers = {'Content-Type': 'application/json'}
req.body = '{ "postcode": "' + postcode + '" }'

let json = await req.loadJSON()
let data = json.data

// Static per-kwh prices: these include supply charges, the Amber fee, green energy rates, etc.
var staticKwhPrice = parseFloat(data.staticPrices.E1.totalfixedKWHPrice)
var lossFactor = parseFloat(data.staticPrices.E1.lossFactor)

// Variable prices: This is a list of 30-minute intervals of past/current (ACTUAL) and future (FORECAST) 
// power prices.
for (i=0; i<data.variablePricesAndRenewables.length; i++) {
    var thisPeriod = data.variablePricesAndRenewables[i]
    if (thisPeriod.periodType == 'ACTUAL') {
        // We push the actual figures into currentPrice/currentRenewables. These are in time order so we'll end up 
        // using the last one for 'current'.
        currentPrice = Math.round((parseFloat(thisPeriod.wholesaleKWHPrice) * lossFactor) + staticKwhPrice, 4) / 100
        currentRenewables = Math.round(parseFloat(thisPeriod.renewablesPercentage) * 100)
    } else if (thisPeriod.periodType == 'FORECAST' && nextPrice == 0) {
        // the first 'FORECAST' becomes the next period price.
        nextPrice = Math.round((parseFloat(thisPeriod.wholesaleKWHPrice) * lossFactor) + staticKwhPrice, 4) / 100

    }
}

if (config.runsInWidget) {
    let widget = createWidget()
    Script.setWidget(widget)
    Script.complete()
} else {
    QuickLook.present(createWidget());
}

function createWidget() {
    let w = new ListWidget()

    // Set background color to green / orange / red based on current rate.
    if (currentPrice <= 0.20) {
        bgColor = '#18df95'
    } else if (currentPrice <= 0.25) {
        bgColor = '#ffad10'
    } else {
        bgColor = '#e23a3b'
    }
    w.backgroundColor = new Color(bgColor)

    // Add 'AMBER' heading
    let header = w.addText('AMBER ELECTRICITY')
    header.textColor = Color.white()
    header.textOpacity = 0.7

    // Add 'Current price' in 22pt font
    let bodyText = w.addText("$" + currentPrice + "/kwh")
    bodyText.font = Font.mediumRoundedSystemFont(22)
    bodyText.textColor = Color.white()

    // Add 'Next price' in smaller 14pt font
    let nextText = w.addText("Next $" + nextPrice + "/kwh")
    nextText.font = Font.mediumRoundedSystemFont(14)
    nextText.textColor = Color.white()

    // Add '% Renewables' annotation in 14pt font, lower opacity
    let renewableText = w.addText(currentRenewables + "% renewables")
    renewableText.font = Font.mediumRoundedSystemFont(14)
    renewableText.textColor = Color.white()
    renewableText.textOpacity = 0.8


    // Add 'last updated' date to footer   
    var nowDate = new Date()
    var nowFormDate = nowDate.toLocaleTimeString('en-AU')
    let footer = w.addText("as at " + nowFormDate)
    footer.font = Font.footnote()
    footer.textColor = Color.white()
    footer.textOpacity = 0.8

    return w
}