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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| import { UUID } from '@/lib/types'; | ||
| import { PublicAttendance } from '@/lib/types/apiResponses'; | ||
| import { Community } from '@/lib/types/enums'; | ||
| import { seededRandom, toCommunity } from '@/lib/utils'; | ||
| import { useEffect, useMemo, useRef, useState } from 'react'; | ||
| import styles from './style.module.scss'; | ||
|
|
||
| const communityColors: [Community, string][] = [ | ||
| [Community.DESIGN, styles.design], | ||
| [Community.CYBER, styles.cyber], | ||
| [Community.HACK, styles.hack], | ||
| [Community.AI, styles.ai], | ||
| [Community.GENERAL, styles.general], | ||
| ]; | ||
|
|
||
| type PieSlice = { | ||
| path: string; | ||
| className: string; | ||
| }; | ||
|
|
||
| function computePie( | ||
| uuid: UUID, | ||
| recentAttendances: PublicAttendance[], | ||
| width: number, | ||
| height: number | ||
| ): PieSlice[] { | ||
| if (width === 0 && height === 0) { | ||
| return []; | ||
| } | ||
|
|
||
| const hex = uuid.replaceAll('-', ''); | ||
| const random = seededRandom( | ||
| parseInt(hex.slice(0, 8), 16), | ||
| parseInt(hex.slice(8, 16), 16), | ||
| parseInt(hex.slice(16, 24), 16), | ||
| parseInt(hex.slice(24, 32), 16) | ||
| ); | ||
|
|
||
| const communities: Record<Community, number> = { | ||
| [Community.HACK]: 0, | ||
| [Community.AI]: 0, | ||
| [Community.CYBER]: 0, | ||
| [Community.DESIGN]: 0, | ||
| [Community.GENERAL]: 0, | ||
| }; | ||
| let total = 0; | ||
|
|
||
| recentAttendances.forEach(({ event: { committee } }) => { | ||
| const community = toCommunity(committee); | ||
| communities[community] += 1; | ||
| total += 1; | ||
| }); | ||
|
|
||
| const radius = Math.hypot(width / 2, height / 2); | ||
| let angle = random() * Math.PI * 2; | ||
|
|
||
| return ( | ||
| communityColors | ||
| .map(([community, className]) => { | ||
| const portion = communities[community] / total; | ||
| if (portion === 0) { | ||
| return { path: '', className, portion }; | ||
| } | ||
| if (portion === 1) { | ||
| // Draw a circle | ||
| return { | ||
| path: [ | ||
| `M ${width / 2 - radius} ${height / 2}`, | ||
| `A ${radius} ${radius} 0 0 0 ${width / 2 + radius} ${height / 2}`, | ||
| `A ${radius} ${radius} 0 0 0 ${width / 2 - radius} ${height / 2}`, | ||
| 'z', | ||
| ].join(''), | ||
| className, | ||
| portion, | ||
| }; | ||
| } | ||
|
|
||
| const endAngle = angle + portion * Math.PI * 2; | ||
|
|
||
| const path = [ | ||
| `M ${width / 2} ${height / 2}`, | ||
| `L ${width / 2 + Math.cos(angle) * radius} ${height / 2 + Math.sin(angle) * radius}`, | ||
| // A rx ry x-axis-rotation large-arc-flag sweep-flag x y | ||
| `A ${radius} ${radius} 0 ${portion > 0.5 ? 1 : 0} 1 ${ | ||
| width / 2 + Math.cos(endAngle) * radius | ||
| } ${height / 2 + Math.sin(endAngle) * radius}`, | ||
| 'z', | ||
| ].join(''); | ||
|
|
||
| angle = endAngle; | ||
| return { path, className, portion }; | ||
| }) | ||
| // Make the biggest blobs fade in first | ||
| .sort((a, b) => b.portion - a.portion) | ||
| ); | ||
| } | ||
|
|
||
| interface BannerProps { | ||
| uuid: UUID; | ||
| recentAttendances: PublicAttendance[]; | ||
| } | ||
|
|
||
| const Banner = ({ uuid, recentAttendances }: BannerProps) => { | ||
| const [width, setWidth] = useState(0); | ||
| const [height, setHeight] = useState(0); | ||
|
|
||
| const ref = useRef<SVGSVGElement>(null); | ||
|
|
||
| useEffect(() => { | ||
| const observer = new ResizeObserver(entries => { | ||
| const size = entries[0]?.borderBoxSize[0]; | ||
| if (size) { | ||
| setWidth(size.inlineSize); | ||
| setHeight(size.blockSize); | ||
| } | ||
| }); | ||
| if (ref.current) { | ||
| observer.observe(ref.current); | ||
| } | ||
| return () => { | ||
| observer.disconnect(); | ||
| }; | ||
| }); | ||
|
|
||
| const slices = useMemo( | ||
| () => computePie(uuid, recentAttendances, width, height), | ||
| [uuid, recentAttendances, width, height] | ||
| ); | ||
| const blurRadius = useMemo(() => Math.hypot(width / 2, height / 2) / 4, [width, height]); | ||
|
|
||
| return ( | ||
| <svg ref={ref} className={styles.banner}> | ||
| {/* Avoid clipping off the blur: https://stackoverflow.com/a/6556655 */} | ||
| <filter id="blur" x="-50%" y="-50%" width="200%" height="200%"> | ||
| <feGaussianBlur in="SourceGraphic" stdDeviation={blurRadius} /> | ||
| </filter> | ||
|
|
||
| {slices.map(({ path, className }, i) => | ||
| path ? ( | ||
| <path | ||
| d={path} | ||
| className={`${styles.path} ${className}`} | ||
| filter="url(#blur)" | ||
| style={{ animationDelay: `${i * 0.7 + 0.5}s` }} | ||
| key={className} | ||
| /> | ||
| ) : null | ||
| )} | ||
| </svg> | ||
| ); | ||
| }; | ||
|
|
||
| export default Banner; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| @use 'src/styles/vars.scss' as vars; | ||
|
|
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| .banner { | ||
| height: 100%; | ||
| inset: 0; | ||
| position: absolute; | ||
| width: 100%; | ||
|
|
||
| .path { | ||
| animation: fade-in 2s backwards; | ||
|
|
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| @keyframes fade-in { | ||
| from { | ||
| opacity: 0; | ||
| } | ||
|
|
||
| to { | ||
| opacity: 1; | ||
| } | ||
| } | ||
|
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| &.hack { | ||
| fill: vars.$orange-5; | ||
| } | ||
|
|
||
| &.ai { | ||
| fill: vars.$scarlet-4; | ||
| } | ||
|
|
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| &.cyber { | ||
| fill: vars.$cyan-5; | ||
| } | ||
|
|
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| &.design { | ||
| fill: vars.$pink-4; | ||
| } | ||
|
|
||
| &.general { | ||
| fill: vars.$blue-5; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| export type Styles = { | ||
| ai: string; | ||
| banner: string; | ||
| cyber: string; | ||
| design: string; | ||
| fadeIn: string; | ||
| general: string; | ||
| hack: string; | ||
| path: string; | ||
| }; | ||
|
|
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| export type ClassNames = keyof Styles; | ||
|
|
||
| declare const styles: Styles; | ||
|
|
||
| export default styles; |
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