SLDepartures.js

// Variables used by Scriptable.
// These must be at the very top of the file. Do not edit.
// icon-color: blue; icon-glyph: bus-alt;

// Script to show real time SL departure information using the SL real-time API https://www.trafiklab.se/node/15754/documentation

// Todo: Pass siteID and StopPointNumber as arguments
const siteID = "9001" // 9001 is T-Centralen, replace with your station's ID. See: https://www.trafiklab.se/api/sl-platsuppslag/dokumentation
const myKey = "thekey" // Replace with your key, get it from https://www.trafiklab.se/api/sl-platsuppslag
const timeWindow = "30" // Show departures in the next 30 minutes
const myStopPointNumber = "" // Specify a StopPointNumber if you want departures only from a specific spot — e.g. with buses, each "direction" has a direction has a different StopPointNumber, even if siteID is the same. Leave it blank if you want to track departures in all directions

const maxEntries = 6 // Display the next 6 departures
const maxChars = 22 // Max characters to display of the Destination (middle column)

const bgColour = new Color("#000000") // Use solid black background
const lineFont = new Font("Menlo",14)
const footerFont = new Font("Helvetica",13)

let url = "https://api.sl.se/api2/realtimedeparturesV4.json?key=" + myKey + "&siteid=" + siteID + "&timewindow=" + timeWindow

let req = new Request(url)
let json = await req.loadJSON()

// Todo: Show all/ specific departure types (e.g. Metro/ Train/ Ship etc.) as well
items = json.ResponseData.Buses // This script only cares about buses, refer to documentation at https://www.trafiklab.se/node/15754/documentation for details about other departure types

let widget = await createWidget(items)

if (!config.runsInWidget) { // Show a preview of the widget, if it's not being run as a widget
  await widget.presentMedium()
}

Script.setWidget(widget)
Script.complete()

async function createWidget(items) {
  let w = new ListWidget()
  let num = 0
  
  w.backgroundColor = bgColour
      
  for (item of items) {
    
    let lineNumber = item.LineNumber
    let stopPointNumber = item.StopPointNumber
    
    if (myStopPointNumber != "") { // If it's not empty, we only care about a specific StopPointNumber
      if (stopPointNumber != myStopPointNumber) { // We don't care about this StopPointNumber
        continue 
      }
    }
    
    let destination = item.Destination
    let displayTime = item.DisplayTime
    
    let theLine = w.addText(lineNumber + "\t" + destination.trim(maxChars).padEnd(maxChars," ") + "\t" + displayTime)
    theLine.font = lineFont
    
    num = num + 1
    if (num == maxEntries) {
      break
    }
  }
  
  w.addSpacer(10)

  let theFooter = w.addText("Updated: " + await timehMMSS())
  theFooter.font = footerFont
  
  return w
}

async function timehMMSS() {
  var theDate = new Date() 
  return theDate.getHours() + ":" + ("0"+theDate.getMinutes()).slice(-2) + ":" + ("0"+theDate.getSeconds()).slice(-2)
}