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/*global document, d3, XMLHttpRequest, navigator */
"use strict";
function gid(text) {
return document.getElementById(text);
}
function dilate(a) {
var delta = (a[1] - a[0]) * 0.1;
return [a[0] - delta, a[1] + delta];
}
function set_weather(d) {
gid("temperature").textContent = Math.round(d.temperature) + "°C";
gid("icon").className = "wi wi-forecast-io-" + d.icon;
gid("summary").textContent = d.summary;
gid("humidity").textContent = Math.round(d.humidity * 100) + "%";
gid("precipitation").textContent = (d.precipIntensity.toFixed(2) +
" mm/hr (" + Math.round(d.precipProbability * 100) + "%)");
gid("wind").textContent = Math.round(d.windSpeed) + " km/hr";
gid("wind-icon").className = "wi wi-wind from-" + d.windBearing + "-deg";
gid("date").textContent = (d3.time.format("%a %I %p"))(d.time);
}
function plot(data, current) {
data.forEach(function (d) {
d.time = new Date(d.time * 1000);
});
var margin = {top: 30, right: 30, bottom: 30, left: 30},
width = 390 - margin.left - margin.right,
height = 170 - margin.top - margin.bottom,
x = d3.time.scale().range([0, width]),
y1 = d3.scale.linear().range([height, 0]),
y2 = d3.scale.linear().range([height, 0]),
xAxis = d3.svg.axis().scale(x)
.orient("bottom").ticks(5),
y1Axis = d3.svg.axis().scale(y1)
.orient("left").ticks(3),
y2Axis = d3.svg.axis().scale(y2)
.orient("right").ticks(3),
templine = d3.svg.line()
.x(function (d) { return x(d.time); })
.y(function (d) { return y1(d.temperature); }),
precipline = d3.svg.line()
.x(function (d) { return x(d.time); })
.y(function (d) { return y2(d.precipIntensity); }),
svg = d3.select("#plot")
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" +
margin.left + "," + margin.top + ")"),
background,
tempspot,
precipspot;
x.domain(d3.extent(data, function (d) { return d.time; }));
y1.domain(dilate(d3.extent(data, function (d) { return d.temperature; })));
y2.domain(dilate(d3.extent(data, function (d) {
return d.precipIntensity;
})));
background = svg.append("g")
.attr("class", "background");
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(y1Axis);
svg.append("g")
.attr("class", "y2 axis")
.attr("transform", "translate(" + width + ",0)")
.call(y2Axis);
background.selectAll("rect")
.data(data.slice(0, -1))
.enter().append("rect")
.attr("class", function (d) { return d.icon; })
.attr("x", function (d) { return x(d.time); })
.attr("y", "0")
.attr("height", height)
.attr("width", width / data.length + 2)
.on("mouseover", function (d) {
set_weather(d);
tempspot
.style("display", "inherit")
.attr("cx", x(d.time))
.attr("cy", y1(d.temperature));
precipspot
.style("display", "inherit")
.attr("cx", x(d.time))
.attr("cy", y2(d.precipIntensity));
})
.on("mouseout", function () {
tempspot
.style("display", "none");
precipspot
.style("display", "none");
set_weather(current);
});
svg.append("path")
.datum(data)
.attr("class", "templine")
.attr("d", templine);
svg.append("path")
.datum(data)
.attr("class", "precipline")
.attr("d", precipline);
tempspot = svg.append("circle")
.attr("class", "spot tempspot")
.attr("r", 3.5);
precipspot = svg.append("circle")
.attr("class", "spot precipspot")
.attr("r", 3.5);
}
function process_data(text) {
var data = JSON.parse(text);
data.currently.time = new Date(data.currently.time * 1000);
console.log(data.hourly.data[0]);
set_weather(data.currently);
plot(data.hourly.data.slice(0, 26), data.currently);
gid("weather").style.display = "inherit";
}
function process_request(request) {
if (request.readyState === 4) {
if (request.status === 200) {
process_data(request.responseText);
} else {
console.log("There was a problem with the request.");
}
}
}
function get_weather(latitude, longitude) {
var httpRequest = new XMLHttpRequest(),
url = "weather/" + latitude + "/" + longitude;
httpRequest.onreadystatechange = function () {
process_request(httpRequest);
};
httpRequest.open("GET", url);
httpRequest.send();
}
document.addEventListener("DOMContentLoaded", function () {
navigator.geolocation.getCurrentPosition(function (position) {
get_weather(position.coords.latitude, position.coords.longitude);
});
});
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