2.0 first commit

src/sample-data.ts

@@ -0,0 +1,59 @@
+import type { Time, } from 'lightweight-charts';
+
+type LineData = {
+	time: Time;
+	value: number;
+};
+
+export type CandleData = {
+	time: Time;
+	high: number;
+	low: number;
+	close: number;
+	open: number;
+};
+
+let randomFactor = 25 + Math.random() * 25;
+const samplePoint = (i: number) =>
+	i *
+		(0.5 +
+			Math.sin(i / 10) * 0.2 +
+			Math.sin(i / 20) * 0.4 +
+			Math.sin(i / randomFactor) * 0.8 +
+			Math.sin(i / 500) * 0.5) +
+	200;
+
+export function generateLineData(numberOfPoints: number = 500): LineData[] {
+	randomFactor = 25 + Math.random() * 25;
+	const res = [];
+	const date = new Date(Date.UTC(2018, 0, 1, 12, 0, 0, 0));
+	for (let i = 0; i < numberOfPoints; ++i) {
+		const time = (date.getTime() / 1000) as Time;
+		const value = samplePoint(i);
+		res.push({
+			time,
+			value,
+		});
+
+		date.setUTCDate(date.getUTCDate() + 1);
+	}
+
+	return res;
+}
+
+export function generateCandleData(numberOfPoints: number = 250): CandleData[] {
+	const lineData = generateLineData(numberOfPoints);
+	return lineData.map((d, i) => {
+		const randomRanges = [-1 * Math.random(), Math.random(), Math.random()].map(
+			j => j * 10
+		);
+		const sign = Math.sin(Math.random() - 0.5);
+		return {
+			time: d.time,
+			low: d.value + randomRanges[0],
+			high: d.value + randomRanges[1],
+			open: d.value + sign * randomRanges[2],
+			close: samplePoint(i + 1),
+		};
+	});
+}