Dark Sky Forecast

script

// set personal API key credential
let credential = Credential.create("Dark Sky API Key", "Enter your Dark Sky API key, which can be copied from the darksky.net developer console page after creating a free account.");

credential.addTextField("key", "API Key");
credential.authorize();
let apiKey = credential.getValue("key");

// method to fetch forecast data
let getForecast = (latitude, longitude) => {
	// build URL to Dark Sky API forecast endpoint
	let endpoint = `https://api.darksky.net/forecast/${apiKey}/${latitude},${longitude}`;

	// create and make HTTP request
	let http = HTTP.create();
	let response = http.request({
		"url": endpoint,
		"method": "GET"
	});

	// check for a success 200 response
	if (response.statusCode != 200) {
		context.fail();
		console.log("Dark Sky Error: " + response.error);
		return null;
	}

	// parse response JSON to object
	let data = JSON.parse(response.responseText);
	if (!data) {
		context.fail();
		console.log("Dark Sky Error: Unable to parse response");
		return null;
	}

	// return the forecast data object
	return data;	
}

let lat = draft.processTemplate("[[latitude]]")
let lon = draft.processTemplate("[[longitude]]");
let darkSkyURL = `https://darksky.net/forecast/${lat},${lon}`;

let data = getForecast(lat, lon);
if (data) {
	// See details on all information in response at API docs
	// https://darksky.net/dev/docs
	let d = [];
	d.push(`Temperature: ${data.currently.temperature}`);
	d.push(`Summary: ${data.currently.summary}`);
	d.push(`Expected: ${data.minutely.summary}`);
	d.push(`Today's High: ${data.daily.data[0].temperatureHigh}`);
	d.push(`Today's Low: ${data.daily.data[0].temperatureLow}`);

	let p = Prompt.create();
	p.title = "Dark Sky Forecast";
	p.message = d.join("\n");

	p.addButton("Open at DarkSky.net");
	if (p.show()) {
		app.openURL(darkSkyURL, true);
	}
}
else {
	alert("Unable to fetch Dark Sky forecast information. Check action log for details");
}