Changing things on the front-end

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Sun Dec 12 2021 10:42:54 GMT+0000 (Coordinated Universal Time)

// One of the functions that react to the dropdown menus being changed and
// to prevent duplicate stations.
function onChange1() {
  if (isRunning || isPaused) {
    alert(
      "Please reset the model first before changing this parameter. Changing the parameter will reset the simulation."
    );
  } else {
    var choice1 = document.getElementsByName("choices1")[0].value;
    if (choice1 == "none") {
      let position2 = getKeyByValue(positions, 2);
      positions[position2] = 0;
    } else {
      let position2 = getKeyByValue(positions, 2);
      let position3 = getKeyByValue(positions, 3);
      let position4 = getKeyByValue(positions, 4);
      if (choice1 == position3 || choice1 == position4) {
        alert("Duplicates found. Please choose a different station.");
        let select = document.querySelector("#select1");
        select.value = "none";
      } else {
        positions[choice1] = 2;
      }
      positions[position2] = 0;
    }
    redrawWindow();
  }
}

// Function to track changes in the input value boxes.
function changeProb() {
  if (isRunning || isPaused) {
    alert(
      "Please reset the model first before changing this parameter. Changing the parameter will reset the simulation."
    );
  } else {
    probArrival = 1 / Number(document.getElementById("probArrival").value);
    probImmigration =
      1 / Number(document.getElementById("probImmigration").value);
    probTesting = 1 / Number(document.getElementById("probTesting").value);
    probCovid = Number(document.getElementById("probCOVID").value);
    testingTime = Number(document.getElementById("timeTest").value);
    probFindBaggage = Number(document.getElementById("probBaggage").value);
    animationDelay = Number(document.getElementById("animationDelay").value);
    passengerCount = Number(document.getElementById("passengerCount").value);
    simulationRuns = Number(document.getElementById("simulationRuns").value);
    randomChosenQueue = Number(
      document.getElementById("randomChosenQueue").value
    );
  }
}

// Value safety for the input boxes
function runSim() {
  let choice1 = document.getElementsByName("choices1")[0].value;
  let choice2 = document.getElementsByName("choices2")[0].value;
  let choice3 = document.getElementsByName("choices3")[0].value;
  isPaused = false;
  changeProb();

  if (choice1 == "none" && choice2 == "none" && choice3 == "none") {
    alert("Please make at least one station choice.");
  } else if (isRunning) {
    alert("Already running.");
  } else if (
    isNaN(probArrival) ||
    isNaN(probCovid) ||
    isNaN(probImmigration) ||
    isNaN(probTesting) ||
    isNaN(probFindBaggage) ||
    isNaN(testingTime) ||
    isNaN(animationDelay) ||
    isNaN(passengerCount) ||
    isNaN(simulationRuns) ||
    isNaN(randomChosenQueue)
  ) {
    alert("At least one of the inputs is not a number.");
  } else {
    isRunning = true;
    simTimer = window.setInterval(simStep, animationDelay);
  }
}

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Changing things on the front-end

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