TimeSeriesChart.tsx
137 lines
| 1 | import React, {useEffect, useState} from 'react'; |
| 2 | import Chart from 'react-apexcharts'; |
| 3 | import {ApexOptions} from 'apexcharts'; |
| 4 | import apiFetch from '@wordpress/api-fetch'; |
| 5 | |
| 6 | /** |
| 7 | * @since 4.4.0 |
| 8 | */ |
| 9 | type TimeSeriesChartProps = { |
| 10 | endpoint: string; |
| 11 | amountFormatter: Intl.NumberFormat; |
| 12 | title?: string; |
| 13 | }; |
| 14 | |
| 15 | /** |
| 16 | * @since 4.4.0 |
| 17 | */ |
| 18 | type Donation = { |
| 19 | createdAt: { |
| 20 | date: string; |
| 21 | }; |
| 22 | amount: { |
| 23 | value: string; |
| 24 | }; |
| 25 | }; |
| 26 | |
| 27 | /** |
| 28 | * @since 4.4.0 |
| 29 | */ |
| 30 | type DataPoint = { |
| 31 | x: string; |
| 32 | y: number; |
| 33 | }; |
| 34 | |
| 35 | /** |
| 36 | * @since 4.4.0 |
| 37 | * Generates a range of dates around a target date for displaying a single donation graph. |
| 38 | */ |
| 39 | const getCenteredGraphRange = (targetDate: string) => { |
| 40 | const result = []; |
| 41 | const date = new Date(targetDate); |
| 42 | |
| 43 | for (let i = -3; i <= 3; i++) { |
| 44 | const currentDate = new Date(date); |
| 45 | currentDate.setDate(date.getDate() + i); |
| 46 | result.push(currentDate.toISOString().split('T')[0]); |
| 47 | } |
| 48 | return result; |
| 49 | }; |
| 50 | |
| 51 | /** |
| 52 | * @since 4.4.0 |
| 53 | */ |
| 54 | const normalizeData = (donations: Donation[]): DataPoint[] => { |
| 55 | const map = new Map<string, number>(); |
| 56 | |
| 57 | // Group donations by date with sum amounts - fill missing dates with 0. |
| 58 | donations.forEach((donation) => { |
| 59 | const date = donation.createdAt.date.split(' ')[0]; |
| 60 | const amount = parseFloat(donation.amount.value); |
| 61 | map.set(date, (map.get(date) || 0) + amount); |
| 62 | }); |
| 63 | |
| 64 | // Set graph range & points for single donations. |
| 65 | if (map.size === 1) { |
| 66 | const donationDate = donations[0]?.createdAt.date.split(' ')[0]; |
| 67 | const graphRange = getCenteredGraphRange(donationDate); |
| 68 | |
| 69 | return graphRange.map((date) => ({ |
| 70 | x: date, |
| 71 | y: map.get(date) || 0, |
| 72 | })); |
| 73 | } |
| 74 | |
| 75 | // Convert to sorted array of data points. |
| 76 | return Array.from(map.entries()) |
| 77 | .map(([date, amount]) => ({ |
| 78 | x: date, |
| 79 | y: amount, |
| 80 | })) |
| 81 | .sort((a, b) => a.x.localeCompare(b.x)); |
| 82 | }; |
| 83 | |
| 84 | /** |
| 85 | * @since 4.4.0 |
| 86 | */ |
| 87 | export default function TimeSeriesChart({endpoint, amountFormatter, title = ''}: TimeSeriesChartProps) { |
| 88 | const [series, setSeries] = useState([{name: title, data: []}]); |
| 89 | |
| 90 | useEffect(() => { |
| 91 | apiFetch<Donation[]>({path: endpoint}).then((data) => { |
| 92 | const normalized = normalizeData(data); |
| 93 | setSeries([{name: title, data: normalized}]); |
| 94 | }); |
| 95 | }, [endpoint]); |
| 96 | |
| 97 | const options: ApexOptions = { |
| 98 | chart: { |
| 99 | type: 'area' as const, |
| 100 | toolbar: {show: false}, |
| 101 | zoom: {enabled: false}, |
| 102 | }, |
| 103 | xaxis: { |
| 104 | type: 'datetime', |
| 105 | labels: {format: 'MMM dd, yyyy'}, |
| 106 | }, |
| 107 | yaxis: { |
| 108 | min: 0, |
| 109 | labels: { |
| 110 | formatter: (val) => amountFormatter.format(val), |
| 111 | }, |
| 112 | }, |
| 113 | dataLabels: {enabled: false}, |
| 114 | stroke: { |
| 115 | curve: 'smooth', |
| 116 | width: 2, |
| 117 | colors: ['#60a1e2'], |
| 118 | }, |
| 119 | fill: { |
| 120 | type: 'gradient', |
| 121 | gradient: { |
| 122 | shadeIntensity: 1, |
| 123 | opacityFrom: 0.3, |
| 124 | opacityTo: 0, |
| 125 | stops: [0, 100], |
| 126 | }, |
| 127 | }, |
| 128 | tooltip: { |
| 129 | x: { |
| 130 | format: 'MMM dd, yyyy', |
| 131 | }, |
| 132 | }, |
| 133 | }; |
| 134 | |
| 135 | return <Chart options={options} series={series} type="area" height="250" />; |
| 136 | } |
| 137 |