mizzkey/packages/frontend/src/components/MkRetentionHeatmap.vue

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<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';
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import { Chart } from 'chart.js';
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import * as os from '@/os';
import { defaultStore } from '@/store';
import { useChartTooltip } from '@/scripts/use-chart-tooltip';
import { alpha } from '@/scripts/color';
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import { initChart } from '@/scripts/init-chart';
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initChart();
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const rootEl = $shallowRef<HTMLDivElement>(null);
const chartEl = $shallowRef<HTMLCanvasElement>(null);
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const now = new Date();
let chartInstance: Chart = null;
let fetching = $ref(true);
const { handler: externalTooltipHandler } = useChartTooltip({
position: 'middle',
});
async function renderChart() {
if (chartInstance) {
chartInstance.destroy();
}
const wide = rootEl.offsetWidth > 600;
const narrow = rootEl.offsetWidth < 400;
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const maxDays = wide ? 10 : narrow ? 5 : 7;
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let raw = await os.api('retention', { });
raw = raw.slice(0, maxDays + 1);
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const data = [];
for (const record of raw) {
data.push({
x: 0,
y: record.createdAt,
v: record.users,
});
let i = 1;
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for (const date of Object.keys(record.data).sort((a, b) => new Date(a).getTime() - new Date(b).getTime())) {
data.push({
x: i,
y: record.createdAt,
v: record.data[date],
});
i++;
}
}
fetching = false;
await nextTick();
const color = defaultStore.state.darkMode ? '#b4e900' : '#86b300';
const getYYYYMMDD = (date: Date) => {
const y = date.getFullYear().toString().padStart(2, '0');
const m = (date.getMonth() + 1).toString().padStart(2, '0');
const d = date.getDate().toString().padStart(2, '0');
return `${y}/${m}/${d}`;
};
const max = (createdAt: string) => raw.find(x => x.createdAt === createdAt)!.users;
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const marginEachCell = 12;
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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);
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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,
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padding: 0,
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maxRotation: 0,
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autoSkipPadding: 0,
autoSkip: false,
callback: (value, index, values) => value,
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},
},
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)));
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},
label(context) {
const v = context.dataset.data[context.dataIndex];
return [`Active: ${v.v} (${Math.round((v.v / max(v.y)) * 100)}%)`];
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},
},
//mode: 'index',
animation: {
duration: 0,
},
external: externalTooltipHandler,
},
},
},
});
}
onMounted(async () => {
renderChart();
});
</script>