[READ-ONLY] Mirror of https://github.com/probablykasper/starchart. GitHub star history graph
starchart.kasper.space
chart
github
github-api
github-star
graph
history
star
star-history
stargazers
stars
Clearer code
+13
-15
+13
-15
src/routes/chart.ts
+13
-15
src/routes/chart.ts
···
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type DeepPartial,
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type IChartApi,
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type ISeriesApi,
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type SeriesDataItemTypeMap,
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type SingleValueData,
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type UTCTimestamp,
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} from 'lightweight-charts'
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import { writable } from 'svelte/store'
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function loadJsonLines(): LineJson[] {
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try {
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const seriesLocalStorage = JSON.parse(localStorage.getItem('starchart-series') || '[]')
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if (seriesLocalStorage?.v !== jsonTypeVersion || seriesLocalStorage?.expiry < Date.now()) {
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localStorage.removeItem('starchart-series')
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} else {
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const seriesLocalStorage = JSON.parse(localStorage.getItem('starchart-series') || '{}')
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if (seriesLocalStorage?.v === jsonTypeVersion || seriesLocalStorage?.expiry > Date.now()) {
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return (seriesLocalStorage as Json).lines
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} else {
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localStorage.removeItem('starchart-series')
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}
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} catch (_e) {
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// ignore
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} catch (e) {
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console.log('Could not load lines', e)
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}
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return []
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}
···
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if (lineJson.data.length >= 1) {
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const start = lineJson.data[0]
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const end = lineJson.final ?? lineJson.data[lineJson.data.length - 1]
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const chartData = toChartData(lineJson.data, start, end)
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const chartData = toChartSeries(lineJson.data, start, end)
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series.setData(chartData)
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}
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const line: Line = {
···
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}
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const start = line.data[line.data.length - 1] ?? data[0]
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const end = line.final ?? data[data.length - 1]
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const chartData = toChartData(data, start, end)
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const chartData = toChartSeries(data, start, end)
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const fresh = line.data.length === 0
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if (fresh) {
···
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localStorage.setItem('starchart-series', JSON.stringify(json))
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}
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type Series = SeriesDataItemTypeMap['Area'][]
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function toChartData(data: DataPoint[], start: DataPoint, final: DataPoint): Series {
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const dataPoints: { date: Date; value?: number }[] = []
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function toChartSeries(data: DataPoint[], start: DataPoint, final: DataPoint) {
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const dataPoints: { date: Date; value: number }[] = []
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for (const dataPoint of [start, ...data, final]) {
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const dt = new Date(dataPoint.t * 1000)
···
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}
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return dataPoints.map((dataPoint) => {
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const dp: SeriesDataItemTypeMap['Area'] = {
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return {
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time: (dataPoint.date.getTime() / 1000) as UTCTimestamp,
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value: dataPoint.value,
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}
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return dp
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} satisfies SingleValueData
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})
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}