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index.html
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<!DOCTYPE html>
<meta charset="utf-8">
<style>
.chart rect {
fill: steelblue;
}
.chart text {
fill: white;
font: 10px sans-serif;
text-anchor: middle;
}
.chart text.axis {
fill: black;
}
</style>
<svg class="chart"></svg>
<script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script>
var width = 5000,
height = 500;
var week = d3.time.format("%Y-%W");
var y = d3.scale.linear()
.range([height, 0]);
var chart = d3.select(".chart")
.attr("width", width)
.attr("height", height + 30);
function param(name) {
name = name.replace(/[\[\]]/g, "\\$&");
var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
results = regex.exec(window.location.href);
if (!results) return null;
if (!results[2]) return '';
return decodeURIComponent(results[2].replace(/\+/g, " "));
}
var token = param('token');
if (!token) {
document.body.innerHTML = 'No token query parameter provided';
}
d3.json("https://strecku.festu.se/api/v1/purchases?limit=" + Number.MAX_SAFE_INTEGER)
.header("authorization", token)
.get(function(error, data) {
data = data.purchases.filter(d => d.price > 0);
data = d3.nest()
.key(function(d) { return week(new Date(d.time)); }).sortKeys(d3.ascending)
.rollup(function(d) { return d3.sum(d, function(d) {
return d.amount !== undefined ? d.amount : 1; });
})
.entries(data);
y.domain([0, d3.max(data, function(d) { return d.values; })]);
var barWidth = width / data.length;
var bar = chart.selectAll("g")
.data(data)
.enter().append("g")
.attr("transform", function(d, i) { return "translate(" + i * barWidth + ",0)"; });
bar.append("rect")
.attr("y", function(d) { return y(d.values); })
.attr("height", function(d) { return height - y(d.values); })
.attr("width", barWidth - 1);
bar.append("text")
.attr("x", barWidth / 2)
.attr("y", function(d) { return y(d.values) + 3; })
.attr("dy", ".75em")
.text(function(d) { return d.values; });
bar.append("text")
.attr("class", "axis")
.attr("x", barWidth / 2)
.attr("y", function(d) { return height + (data.indexOf(d) % 2 === 0 ? 6 : 18); })
.attr("dy", ".75em")
.text(function(d) { return d.key; });
});
</script>