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umami/components/metrics/PageviewsChart.js
2020-08-23 19:50:06 -07:00

175 lines
4.2 KiB
JavaScript

import React, { useState, useRef, useEffect, useCallback } from 'react';
import ReactTooltip from 'react-tooltip';
import classNames from 'classnames';
import ChartJS from 'chart.js';
import { format } from 'date-fns';
import styles from './PageviewsChart.module.css';
export default function PageviewsChart({
websiteId,
data,
unit,
animationDuration = 300,
className,
children,
}) {
const canvas = useRef();
const chart = useRef();
const [tooltip, setTooltip] = useState({});
const renderLabel = useCallback(
(label, index, values) => {
const d = new Date(values[index].value);
const n = data.pageviews.length;
switch (unit) {
case 'day':
if (n >= 15) {
return index % ~~(n / 15) === 0 ? format(d, 'MMM d') : '';
}
return format(d, 'EEE M/d');
case 'month':
return format(d, 'MMMM');
default:
return label;
}
},
[unit, data],
);
const renderTooltip = model => {
const { opacity, title, body, labelColors } = model;
if (!opacity) {
setTooltip(null);
} else {
const [label, value] = body[0].lines[0].split(':');
setTooltip({
title: title[0],
value,
label,
labelColor: labelColors[0].backgroundColor,
});
}
};
function draw() {
if (!canvas.current) return;
if (!chart.current) {
chart.current = new ChartJS(canvas.current, {
type: 'bar',
data: {
datasets: [
{
label: 'unique visitors',
data: data.uniques,
lineTension: 0,
backgroundColor: 'rgb(38, 128, 235, 0.4)',
borderColor: 'rgb(13, 102, 208, 0.4)',
borderWidth: 1,
},
{
label: 'page views',
data: data.pageviews,
lineTension: 0,
backgroundColor: 'rgb(38, 128, 235, 0.2)',
borderColor: 'rgb(13, 102, 208, 0.2)',
borderWidth: 1,
},
],
},
options: {
animation: {
duration: animationDuration,
},
tooltips: {
enabled: false,
custom: renderTooltip,
},
hover: {
animationDuration: 0,
},
scales: {
xAxes: [
{
type: 'time',
distribution: 'series',
time: {
unit,
tooltipFormat: 'ddd MMMM DD YYYY',
},
ticks: {
callback: renderLabel,
maxRotation: 0,
},
gridLines: {
display: false,
},
offset: true,
stacked: true,
},
],
yAxes: [
{
ticks: {
beginAtZero: true,
},
},
],
},
},
});
} else {
const {
data: { datasets },
options,
} = chart.current;
datasets[0].data = data.uniques;
datasets[1].data = data.pageviews;
options.scales.xAxes[0].time.unit = unit;
options.scales.xAxes[0].ticks.callback = renderLabel;
options.animation.duration = animationDuration;
chart.current.update();
}
}
useEffect(() => {
if (data) {
draw();
setTooltip(null);
}
}, [data]);
return (
<div
data-tip=""
data-for={`${websiteId}-tooltip`}
className={classNames(styles.chart, className)}
>
<canvas ref={canvas} width={960} height={400} />
<ReactTooltip id={`${websiteId}-tooltip`}>
{tooltip ? <Tooltip {...tooltip} /> : null}
</ReactTooltip>
{children}
</div>
);
}
const Tooltip = ({ title, value, label, labelColor }) => (
<div className={styles.tooltip}>
<div className={styles.content}>
<div className={styles.title}>{title}</div>
<div className={styles.metric}>
<div className={styles.dot}>
<div className={styles.color} style={{ backgroundColor: labelColor }} />
</div>
{value} {label}
</div>
</div>
</div>
);