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packages/frontend/src/components/MkVisitorDashboard.ActiveUsersChart.vue

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+<template>
+<div>
+	<MkLoading v-if="fetching"/>
+	<div v-show="!fetching" :class="$style.root">
+		<canvas ref="chartEl"></canvas>
+	</div>
+</div>
+</template>
+
+<script lang="ts" setup>
+import { onMounted } from 'vue';
+import { Chart } from 'chart.js';
+import gradient from 'chartjs-plugin-gradient';
+import tinycolor from 'tinycolor2';
+import * as os from '@/os';
+import { defaultStore } from '@/store';
+import { useChartTooltip } from '@/scripts/use-chart-tooltip';
+import { chartVLine } from '@/scripts/chart-vline';
+import { initChart } from '@/scripts/init-chart';
+
+initChart();
+
+const chartEl = $shallowRef<HTMLCanvasElement>(null);
+const now = new Date();
+let chartInstance: Chart = null;
+const chartLimit = 30;
+let fetching = $ref(true);
+
+const { handler: externalTooltipHandler } = useChartTooltip();
+
+async function renderChart() {
+	if (chartInstance) {
+		chartInstance.destroy();
+	}
+
+	const getDate = (ago: number) => {
+		const y = now.getFullYear();
+		const m = now.getMonth();
+		const d = now.getDate();
+
+		return new Date(y, m, d - ago);
+	};
+
+	const format = (arr) => {
+		return arr.map((v, i) => ({
+			x: getDate(i).getTime(),
+			y: v,
+		}));
+	};
+
+	const raw = await os.api('charts/active-users', { limit: chartLimit, span: 'day' });
+
+	const vLineColor = defaultStore.state.darkMode ? 'rgba(255, 255, 255, 0.2)' : 'rgba(0, 0, 0, 0.2)';
+
+	const computedStyle = getComputedStyle(document.documentElement);
+	const accent = tinycolor(computedStyle.getPropertyValue('--accent')).toHexString();
+
+	const colorRead = accent;
+	const colorWrite = '#2ecc71';
+
+	const max = Math.max(...raw.read);
+
+	chartInstance = new Chart(chartEl, {
+		type: 'bar',
+		data: {
+			datasets: [{
+				parsing: false,
+				label: 'Read',
+				data: format(raw.read).slice().reverse(),
+				pointRadius: 0,
+				borderWidth: 0,
+				borderJoinStyle: 'round',
+				borderRadius: 4,
+				backgroundColor: colorRead,
+				barPercentage: 0.5,
+				categoryPercentage: 1,
+				fill: true,
+			}],
+		},
+		options: {
+			aspectRatio: 2.5,
+			layout: {
+				padding: {
+					left: 0,
+					right: 8,
+					top: 0,
+					bottom: 0,
+				},
+			},
+			scales: {
+				x: {
+					type: 'time',
+					offset: true,
+					time: {
+						stepSize: 1,
+						unit: 'day',
+						displayFormats: {
+							day: 'M/d',
+							month: 'Y/M',
+						},
+					},
+					grid: {
+						display: false,
+					},
+					ticks: {
+						display: true,
+						maxRotation: 0,
+						autoSkipPadding: 8,
+					},
+				},
+				y: {
+					position: 'left',
+					suggestedMax: 10,
+					grid: {
+						display: true,
+					},
+					ticks: {
+						display: true,
+						//mirror: true,
+					},
+				},
+			},
+			interaction: {
+				intersect: false,
+				mode: 'index',
+			},
+			plugins: {
+				legend: {
+					display: false,
+				},
+				tooltip: {
+					enabled: false,
+					mode: 'index',
+					animation: {
+						duration: 0,
+					},
+					external: externalTooltipHandler,
+				},
+				gradient,
+			},
+		},
+		plugins: [chartVLine(vLineColor)],
+	});
+
+	fetching = false;
+}
+
+onMounted(async () => {
+	renderChart();
+});
+</script>
+
+<style lang="scss" module>
+.root {
+	padding: 20px;
+}
+</style>