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<script lang="ts">
import { Chart } from 'chart.js';
import { onMount } from 'svelte';
function updateGraph() {
getTrendingSymbols().then((trendingSymbols) => {
const labels = trendingSymbols.map((d) => d.longName);
const datasets = [
{
label: '50 day performance',
data: trendingSymbols.map((ts) => ts.fiftyDayAverageChange),
backgroundColor: 'green'
},
{
label: '52 week performance',
data: trendingSymbols.map((ts) => ts.fiftyTwoWeekLowChange),
backgroundColor: 'orange'
}
];
const data = { labels, datasets };
// @ts-ignore
new Chart(document.getElementById('graph'), {
type: 'bar',
data: data,
options: {
indexAxis: 'y',
elements: {
bar: {
borderWidth: 2
}
},
responsive: true,
plugins: {
legend: {
position: 'bottom'
}
}
}
});
});
}
async function getTrendingSymbols() {
const trendingRes = await fetch('/stocksapi/trendingSymbols');
if (!trendingRes.ok) {
throw new Error('Failed to fetch trending symbols');
}
const trendingJson = await trendingRes.json();
const { quotes } = trendingJson;
const trendingSymbols = await Promise.all(
quotes.map(async (quote: any) => {
const quoteRes = await fetch(`/stocksapi/quote?query=${quote.symbol}`);
const quoteJson = await quoteRes.json();
return quoteJson;
})
);
return trendingSymbols;
}
onMount(() => {
updateGraph();
});
</script>
<h2>Tendances</h2>
<canvas id="graph"></canvas>
<style>
h2 {
font-weight: bold;
color: var(--text-lime);
font-size: 24px;
}
#graph {
max-height: 40vh;
max-width: 40vw;
}
</style>
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