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<!--
SPDX-FileCopyrightText: syuilo and other misskey contributors
SPDX-License-Identifier: AGPL-3.0-only
-->
<template>
<canvas ref="chartEl"></canvas>
</template>
<script lang="ts" setup>
import { onMounted, shallowRef } from 'vue';
import { Chart } from 'chart.js';
import tinycolor from 'tinycolor2';
import { defaultStore } from '@/store.js';
import { useChartTooltip } from '@/scripts/use-chart-tooltip.js';
import { chartVLine } from '@/scripts/chart-vline.js';
import { alpha } from '@/scripts/color.js';
import { initChart } from '@/scripts/init-chart.js';
import * as os from '@/os.js';
initChart();
const chartEl = shallowRef<HTMLCanvasElement>(null);
const { handler: externalTooltipHandler } = useChartTooltip();
let chartInstance: Chart;
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}/${d}`;
};
const getDate = (ymd: string) => {
const [y, m, d] = ymd.split('-').map(x => parseInt(x, 10));
const date = new Date(y, m + 1, d, 0, 0, 0, 0);
return date;
};
onMounted(async () => {
let raw = await os.api('retention', { });
const vLineColor = defaultStore.state.darkMode ? 'rgba(255, 255, 255, 0.2)' : 'rgba(0, 0, 0, 0.2)';
const accent = tinycolor(getComputedStyle(document.documentElement).getPropertyValue('--accent'));
const color = accent.toHex();
chartInstance = new Chart(chartEl.value, {
type: 'line',
data: {
labels: [],
datasets: raw.map((record, i) => ({
label: getYYYYMMDD(new Date(record.createdAt)),
pointRadius: 0,
borderWidth: 2,
borderJoinStyle: 'round',
borderColor: alpha(color, Math.min(1, (raw.length - (i - 1)) / raw.length)),
fill: false,
tension: 0.4,
data: [{
x: '0',
y: 100,
d: getYYYYMMDD(new Date(record.createdAt)),
}, ...Object.entries(record.data).sort((a, b) => getDate(a[0]) > getDate(b[0]) ? 1 : -1).map(([k, v], i) => ({
x: (i + 1).toString(),
y: (v / record.users) * 100,
d: getYYYYMMDD(new Date(record.createdAt)),
}))],
})),
},
options: {
aspectRatio: 2.5,
layout: {
padding: {
left: 0,
right: 0,
top: 0,
bottom: 0,
},
},
scales: {
x: {
title: {
display: true,
text: 'Days later',
},
},
y: {
title: {
display: true,
text: 'Rate (%)',
},
ticks: {
callback: (value, index, values) => value + '%',
},
min: 0,
},
},
interaction: {
intersect: false,
},
plugins: {
legend: {
display: false,
},
tooltip: {
enabled: false,
callbacks: {
title(context) {
const v = context[0].dataset.data[context[0].dataIndex];
return `${v.x} days later`;
},
label(context) {
const v = context.dataset.data[context.dataIndex];
const p = Math.round(v.y) + '%';
return `${v.d} ${p}`;
},
},
mode: 'index',
animation: {
duration: 0,
},
external: externalTooltipHandler,
},
},
},
plugins: [chartVLine(vLineColor)],
});
});
</script>
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