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| document.body.innerHTML = ""; | |
| var script = document.createElement("script"); | |
| script.src = | |
| "https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.bundle.min.js"; | |
| document.body.appendChild(script); | |
| document.body.style.background = "#fff"; | |
| var script = document.createElement("script"); | |
| script.src = | |
| "https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.min.css"; | |
| document.body.appendChild(script); | |
| var link = document.createElement("link"); | |
| link.rel = "stylesheet"; | |
| link.type = "text/css"; | |
| link.href = | |
| "https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.3/Chart.min.css"; | |
| link.media = "all"; | |
| document.getElementsByTagName("head")[0].appendChild(link); | |
| var charts = [ | |
| { | |
| id: "Long", | |
| label: "BTC/USD Long", | |
| backgroundColor: "rgba(0, 255, 0, 0.2)", | |
| url: | |
| "https://api-pub.bitfinex.com/v2/stats1/pos.size:1m:tBTCUSD:long/hist?limit=120", | |
| }, | |
| { | |
| id: "Short", | |
| label: "BTC/USD Short", | |
| backgroundColor: "rgba(255, 0, 0, 0.2)", | |
| url: | |
| "https://api-pub.bitfinex.com/v2/stats1/pos.size:1m:tBTCUSD:short/hist?limit=120", | |
| }, | |
| ]; | |
| var parentDiv = document.createElement("div"); | |
| parentDiv.setAttribute("style", "height: 300px"); | |
| document.body.appendChild(parentDiv); | |
| charts.forEach(({ id }) => { | |
| var div = document.createElement("canvas"); | |
| div.setAttribute("id", id); | |
| div.height = "300px"; | |
| parentDiv.appendChild(div); | |
| }); | |
| var summaryPie = document.createElement("canvas"); | |
| summaryPie.setAttribute("id", "summaryPie"); | |
| summaryPie.height = "300px"; | |
| parentDiv.appendChild(summaryPie); | |
| async function chart() { | |
| const promises = await Promise.all(charts.map(({ url }) => fetch(url))); | |
| const data = await Promise.all(promises.map((res) => res.json())); | |
| charts.forEach(({ id, label, backgroundColor }, index) => { | |
| if (!charts[index].chart) { | |
| // create | |
| charts[index].chart = new Chart(id, { | |
| type: "line", | |
| data: { | |
| datasets: [ | |
| { | |
| label, | |
| backgroundColor, | |
| data: data[index].map(([t, y]) => ({ x: new Date(t), y })), | |
| }, | |
| ], | |
| }, | |
| options: { | |
| scales: { | |
| xAxes: [ | |
| { | |
| type: "time", | |
| }, | |
| ], | |
| }, | |
| }, | |
| }); | |
| } else { | |
| // update | |
| charts[index].chart.data.datasets[0].data = data[index].map(([t, y]) => ({ | |
| x: new Date(t), | |
| y, | |
| })); | |
| charts[index].chart.update(); | |
| } | |
| }); | |
| if (!charts.summaryPie) { | |
| // create | |
| charts.summaryPie = new Chart("summaryPie", { | |
| type: "pie", | |
| data: { | |
| datasets: [{ | |
| data: data.map((d) => d[0][1]), | |
| backgroundColor: charts.map(({ backgroundColor }) => backgroundColor), | |
| }], | |
| labels: charts.map(({ label }) => label), | |
| }, | |
| }); | |
| } else { | |
| // update | |
| charts.summaryPie.data.datasets[0].data = data.map((d) => d[0][1]) | |
| charts.summaryPie.update(); | |
| } | |
| } | |
| chart(); | |
| setInterval(chart, 60000); |
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