Change a Google Ads tROAS for a campaign based on temperature

set tROAS by Min Temp

function main() {
  
  var units = "metric"; // imperial or metric
  var lat = "37.384998";
  var lon = "-122.106689";
  var openWeatherAPIKey = "7d5883a423a025b9bf565291147115b4";  // get your own key for the One Call API from https://openweathermap.org/api
  
  var campaignName = 'Search: Executive Summary Report'; // put your campaign name here
  var bidAdjustment = 1.5; // this is the scaling factor of the current tROAS
  
  var tempThreshold = 11; // this is the temperature below which the tROAS should be changed
  
  
  
  var minTemp = getLowestTemperature(units, lat, lon, openWeatherAPIKey);
  Logger.log("The minimum temperature will be: " + minTemp);
  
  if(minTemp < tempThreshold) {
    Logger.log("Setting a new tROAS because the temperature will be too low");
    setCampaignTRoas(campaignName, bidAdjustment);
  } else {
    Logger.log("The temperature won't be cold enough to change the tROAS.")
  }
  
}

function getLowestTemperature(units, lat, lon, APIKey) {
  
  const weatherUrl = "https://api.openweathermap.org/data/2.5/onecall?units=" + units + "&lat=" + lat + "&lon=" + lon + 
        "&exclude=current,minutely,hourly,alerts&appid=" + APIKey;
  
  const response = UrlFetchApp.fetch(weatherUrl);

  Logger.log("weatherUrl: " + weatherUrl);
  
  if(response.getResponseCode() == 200) {
    var json = JSON.parse(response.getContentText());
  } else {
    throw "An error occured while trying to parse: "+weatherUrl;
  }

  
  var min = json.daily[0].temp.min;
  Logger.log("min: " + min);
  return min;
}

function setCampaignTRoas(name, bidAdjustment) {
  var campaignIterator = AdsApp.campaigns()
                          .withCondition("campaign.name LIKE '" + name + "'")
                          .get();
  
  while(campaignIterator.hasNext()) {
    var campaign = campaignIterator.next();
    const currentTRoas = campaign.bidding().getTargetRoas();
    var newTRoas = bidAdjustment * currentTRoas;
    campaign.bidding().setTargetRoas(newTRoas);
  }
}