<template> <div ref="rootEl"> <MkLoading v-if="fetching"/> <div v-else> <canvas ref="chartEl"></canvas> </div> </div> </template> <script lang="ts" setup> import { onMounted, nextTick } from 'vue'; import { Chart } from 'chart.js'; import * as os from '@/os'; import { defaultStore } from '@/store'; import { useChartTooltip } from '@/scripts/use-chart-tooltip'; import { alpha } from '@/scripts/color'; import { initChart } from '@/scripts/init-chart'; initChart(); const rootEl = $shallowRef<HTMLDivElement>(null); const chartEl = $shallowRef<HTMLCanvasElement>(null); const now = new Date(); let chartInstance: Chart = null; let fetching = $ref(true); const { handler: externalTooltipHandler } = useChartTooltip({ position: 'middle', }); async function renderChart() { if (chartInstance) { chartInstance.destroy(); } const wide = rootEl.offsetWidth > 600; const narrow = rootEl.offsetWidth < 400; const maxDays = wide ? 10 : narrow ? 5 : 7; let raw = await os.api('retention', { }); raw = raw.slice(0, maxDays + 1); const data = []; for (const record of raw) { data.push({ x: 0, y: record.createdAt, v: record.users, }); let i = 1; for (const date of Object.keys(record.data).sort((a, b) => new Date(a).getTime() - new Date(b).getTime())) { data.push({ x: i, y: record.createdAt, v: record.data[date], }); i++; } } fetching = false; await nextTick(); const color = defaultStore.state.darkMode ? '#b4e900' : '#86b300'; const getYYYYMMDD = (date: Date) => { const y = date.getFullYear().toString().padStart(2, '0'); const m = (date.getMonth() + 1).toString().padStart(2, '0'); const d = date.getDate().toString().padStart(2, '0'); return `${y}/${m}/${d}`; }; const max = (createdAt: string) => raw.find(x => x.createdAt === createdAt)!.users; const marginEachCell = 12; chartInstance = new Chart(chartEl, { type: 'matrix', data: { datasets: [{ label: 'Active', data: data, pointRadius: 0, borderWidth: 0, borderJoinStyle: 'round', borderRadius: 3, backgroundColor(c) { const value = c.dataset.data[c.dataIndex].v; const a = value / max(c.dataset.data[c.dataIndex].y); return alpha(color, a); }, fill: true, width(c) { const a = c.chart.chartArea ?? {}; return (a.right - a.left) / maxDays - marginEachCell; }, height(c) { const a = c.chart.chartArea ?? {}; return (a.bottom - a.top) / maxDays - (marginEachCell / 1.5); }, }], }, options: { aspectRatio: wide ? 2 : narrow ? 2 : 2, layout: { padding: { left: 8, right: 0, top: 0, bottom: 0, }, }, scales: { x: { position: 'top', suggestedMax: maxDays, grid: { display: false, }, ticks: { display: true, padding: 0, maxRotation: 0, autoSkipPadding: 0, autoSkip: false, callback: (value, index, values) => value, }, title: { display: true, text: 'Days later', }, }, y: { type: 'time', min: new Date(new Date().getFullYear(), new Date().getMonth(), new Date().getDate() - maxDays), offset: true, reverse: true, position: 'left', time: { unit: 'day', round: 'day', }, grid: { display: false, }, ticks: { maxRotation: 0, autoSkip: true, padding: 1, font: { size: 9, }, }, }, }, plugins: { legend: { display: false, }, tooltip: { enabled: false, callbacks: { title(context) { const v = context[0].dataset.data[context[0].dataIndex]; return getYYYYMMDD(new Date(new Date(v.y).getTime() + (v.x * 86400000))); }, label(context) { const v = context.dataset.data[context.dataIndex]; return [`Active: ${v.v} (${Math.round((v.v / max(v.y)) * 100)}%)`]; }, }, //mode: 'index', animation: { duration: 0, }, external: externalTooltipHandler, }, }, }, }); } onMounted(async () => { renderChart(); }); </script>