import { useId, useRef, useState, type CSSProperties, type FormEvent } from 'react';
import {
Alert,
AlertContent,
AlertIcon,
AlertMain,
AlertTitle,
Avatar,
AvatarFallback,
Badge,
Button,
Card,
Checkbox,
CheckboxCheckedIcon,
CheckboxIndicator,
CheckboxInput,
Heading,
HelperText,
Icon,
IconButton,
Label,
Link,
Popover,
PopoverContent,
PopoverTrigger,
SegmentedControl,
SegmentedControlIndicator,
SegmentedControlItem,
SegmentedControlItemInput,
Select,
SelectCombobox,
SelectIcon,
SelectListbox,
SelectOption,
SelectValue,
Separator,
Switch,
SwitchIndicator,
SwitchInput,
Table,
TableBody,
TableData,
TableHead,
TableHeading,
TableRow,
Text,
TimeField,
TimeFieldInput,
VisuallyHidden,
} from '@vega-ui/react';
import { Bell, BellOff } from '@vega-ui/icons';
import './notifications.css';
type Filter = 'all' | 'mentions' | 'unread';
type Channel = 'email' | 'push' | 'inApp';
type Event = 'mentions' | 'comments' | 'assigned' | 'requests' | 'digest' | 'product';
interface Notification {
id: string
actor: string
action: string
target: string
quote?: string
time: string
group: 'Today' | 'Earlier'
unread: boolean
mention: boolean
request?: 'pending' | 'approved' | 'declined'
}
const people: Record<string, { name: string, initials: string }> = {
priya: { name: 'Priya Nair', initials: 'PN' },
omar: { name: 'Omar Haddad', initials: 'OH' },
alex: { name: 'Alex Kim', initials: 'AK' },
lena: { name: 'Lena Fischer', initials: 'LF' },
jonas: { name: 'Jonas Weber', initials: 'JW' },
sofia: { name: 'Sofia Lindqvist', initials: 'SL' },
};
const initialNotifications: Notification[] = [
{ id: 'n1', actor: 'priya', action: 'mentioned you in', target: 'Checkout v3 flows', quote: '@Elena can you check the spacing of the tax row on mobile?', time: '12 min ago', group: 'Today', unread: true, mention: true },
{ id: 'n2', actor: 'omar', action: 'requested access to', target: 'Q4 budget.xlsx', time: '1 hour ago', group: 'Today', unread: true, mention: false, request: 'pending' },
{ id: 'n3', actor: 'alex', action: 'commented on', target: 'Sticky order summary', quote: 'Pushed a fix, ready for another look.', time: '2 hours ago', group: 'Today', unread: true, mention: false },
{ id: 'n4', actor: 'lena', action: 'assigned you', target: 'Dark theme contrast pass', time: '4 hours ago', group: 'Today', unread: false, mention: false },
{ id: 'n5', actor: 'jonas', action: 'mentioned you in', target: 'Release notes 2.8', quote: 'Elena owns the checkout section.', time: 'Yesterday', group: 'Earlier', unread: true, mention: true },
{ id: 'n6', actor: 'sofia', action: 'shared', target: 'Usability findings, round 2', time: 'Yesterday', group: 'Earlier', unread: false, mention: false },
{ id: 'n7', actor: 'priya', action: 'requested access to', target: 'Brand guidelines.pdf', time: 'Monday', group: 'Earlier', unread: false, mention: false, request: 'approved' },
];
const channels: { key: Channel, label: string }[] = [
{ key: 'email', label: 'Email' },
{ key: 'push', label: 'Push' },
{ key: 'inApp', label: 'In-app' },
];
const events: { key: Event, label: string, description: string, only?: Channel[] }[] = [
{ key: 'mentions', label: 'Mentions and replies', description: 'Someone @mentions you or replies to your comment' },
{ key: 'comments', label: 'Comments', description: 'New comments on items you own or follow' },
{ key: 'assigned', label: 'Assignments', description: 'A task or review is assigned to you' },
{ key: 'requests', label: 'Access requests', description: 'Someone asks to open a file you own' },
{ key: 'digest', label: 'Weekly digest', description: 'A summary of activity every Monday', only: ['email'] },
{ key: 'product', label: 'Product updates', description: 'New features and changes to Northwind', only: ['email', 'inApp'] },
];
const pauses = [
{ value: 'off', label: 'Don’t pause' },
{ value: '1h', label: 'For 1 hour' },
{ value: '8h', label: 'For 8 hours' },
{ value: 'tomorrow', label: 'Until tomorrow, 9:00 AM' },
{ value: 'week', label: 'For 1 week' },
];
const initialPreferences: Record<Event, Record<Channel, boolean>> = {
mentions: { email: true, push: true, inApp: true },
comments: { email: false, push: true, inApp: true },
assigned: { email: true, push: true, inApp: true },
requests: { email: true, push: false, inApp: true },
digest: { email: true, push: false, inApp: false },
product: { email: false, push: false, inApp: true },
};
const field = { display: 'grid', gridTemplateColumns: 'minmax(0, 1fr)', gap: 'var(--spacing-3)', alignContent: 'start' } as const;
const ghost = { variant: 'secondary', appearance: 'ghost' } as const;
const quiet = { variant: 'secondary', appearance: 'transparent' } as const;
export default function Notifications() {
const id = useId();
const popoverTitleRef = useRef<HTMLHeadingElement>(null);
const settingsRef = useRef<HTMLHeadingElement>(null);
const [open, setOpen] = useState(false);
const [filter, setFilter] = useState<Filter>('all');
const [items, setItems] = useState(initialNotifications);
const [preferences, setPreferences] = useState(initialPreferences);
const [pause, setPause] = useState('off');
const [quietHours, setQuietHours] = useState(true);
const [quietFrom, setQuietFrom] = useState('22:00');
const [quietTo, setQuietTo] = useState('07:00');
const [errors, setErrors] = useState<Partial<Record<'requests' | 'from' | 'to', string>>>({});
const [saved, setSaved] = useState(false);
const unread = items.filter((item) => item.unread).length;
const visible = items.filter((item) => {
if (filter === 'mentions') return item.mention;
if (filter === 'unread') return item.unread;
return true;
});
const groups = (['Today', 'Earlier'] as const)
.map((name) => ({ name, items: visible.filter((item) => item.group === name) }))
.filter((group) => group.items.length > 0);
const markRead = (target: string) => {
setItems((current) => current.map((item) => item.id === target ? { ...item, unread: false } : item));
};
const markAllRead = () => {
setItems((current) => current.map((item) => ({ ...item, unread: false })));
popoverTitleRef.current?.focus();
};
const respond = (target: string, request: 'approved' | 'declined') => {
setItems((current) => current.map((item) => item.id === target ? { ...item, request, unread: false } : item));
};
const edit = () => {
setSaved(false);
};
const toggleChannel = (event: Event, channel: Channel) => {
setPreferences({ ...preferences, [event]: { ...preferences[event], [channel]: !preferences[event][channel] } });
if (event === 'requests') setErrors({ ...errors, requests: undefined });
edit();
};
const save = (event: FormEvent<HTMLFormElement>) => {
event.preventDefault();
const form = event.currentTarget;
const nextErrors: Partial<Record<'requests' | 'from' | 'to', string>> = {};
if (!Object.values(preferences.requests).some(Boolean)) nextErrors.requests = 'Keep at least one channel for access requests, or people will wait for an answer that never comes.';
if (quietHours && quietFrom === '') nextErrors.from = 'Enter a start time, like 22:00.';
if (quietHours && quietTo === '') nextErrors.to = 'Enter an end time, like 07:00.';
if (quietHours && quietFrom !== '' && quietFrom === quietTo) nextErrors.to = 'Quiet hours need to end at a different time than they start.';
setErrors(nextErrors);
const invalid = (['requests', 'from', 'to'] as const).find((name) => nextErrors[name]);
if (invalid) {
form.querySelector<HTMLElement>(`[data-field='${invalid}']`)?.focus();
return;
}
setSaved(true);
};
const describe = (name: 'from' | 'to') => errors[name] ? `${id}-${name}-error` : `${id}-quiet-hint`;
return (
<div className='nt-root' style={{ display: 'grid', gap: 'var(--spacing-16)', width: '100%', maxWidth: 960, marginInline: 'auto' }}>
<header style={{ display: 'flex', alignItems: 'center', gap: 'var(--spacing-6)', padding: 'var(--spacing-4) var(--spacing-4) var(--spacing-4) var(--spacing-8)', border: '1px solid var(--separator-opaque)', borderRadius: 'var(--radius-5)', background: 'var(--surface-primary)' }}>
<Text size={3} fontWeight={700} style={{ flex: 1 }}>Northwind</Text>
<Popover role='dialog' placement='bottom-end' open={open} onChangeOpen={setOpen}>
<span style={{ position: 'relative', display: 'inline-flex' }}>
<PopoverTrigger asChild>
<IconButton size='xs' type='button' {...ghost} aria-label={unread > 0 ? `Notifications, ${unread} unread` : 'Notifications'}>
<Icon size='sm'><Bell /></Icon>
</IconButton>
</PopoverTrigger>
{unread > 0 && (
<Badge size='xs' variant='error' appearance='fill' aria-hidden='true' className='nt-count'>{unread}</Badge>
)}
</span>
<PopoverContent aria-labelledby={`${id}-popover-title`} className='nt-popover'>
<div style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', gap: 'var(--spacing-8)', padding: 'var(--spacing-8) var(--spacing-8) 0' }}>
<Heading ref={popoverTitleRef} tabIndex={-1} id={`${id}-popover-title`} as='h2' size={4} fontWeight={600} style={{ outline: 'none' }}>Notifications</Heading>
<Button size='xs' type='button' {...quiet} disabled={unread === 0} onClick={markAllRead}>Mark all as read</Button>
</div>
<div style={{ padding: 'var(--spacing-6) var(--spacing-8) var(--spacing-4)' }}>
<SegmentedControl
size='xs'
name={`${id}-filter`}
role='radiogroup'
aria-label='Show'
value={filter}
style={{ width: '100%' }}
onChange={(event) => setFilter(event.currentTarget.value as Filter)}
>
<SegmentedControlItem value='all' style={{ flex: 1 }}>
<SegmentedControlItemInput />
All
</SegmentedControlItem>
<SegmentedControlItem value='mentions' style={{ flex: 1 }}>
<SegmentedControlItemInput />
Mentions
</SegmentedControlItem>
<SegmentedControlItem value='unread' style={{ flex: 1, fontVariantNumeric: 'tabular-nums' }}>
<SegmentedControlItemInput />
{unread > 0 ? `Unread · ${unread}` : 'Unread'}
</SegmentedControlItem>
<SegmentedControlIndicator />
</SegmentedControl>
</div>
<div className='nt-scroller' tabIndex={-1}>
{groups.length === 0 && (
<div style={{ display: 'grid', justifyItems: 'center', gap: 'var(--spacing-3)', padding: 'var(--spacing-20) var(--spacing-8)', textAlign: 'center' }}>
<Icon size='lg' aria-hidden='true' style={{ color: 'var(--label-tertiary)' }}><BellOff /></Icon>
<Text size={3} fontWeight={500}>You’re all caught up</Text>
<Text size={2} style={{ color: 'var(--label-secondary)' }}>
{filter === 'mentions' ? 'No one has mentioned you yet.' : 'New notifications will show up here.'}
</Text>
</div>
)}
{groups.map((group) => (
<section key={group.name} aria-labelledby={`${id}-${group.name}`}>
<Heading id={`${id}-${group.name}`} as='h3' size={1} fontWeight={600} className='nt-group'>{group.name}</Heading>
<ul style={{ display: 'grid', margin: 0, padding: 0, listStyle: 'none' }}>
{group.items.map((item) => (
<li key={item.id} className='nt-item' data-unread={item.unread}>
<Avatar size='md' aria-hidden='true' style={{ flexShrink: 0 }}>
<AvatarFallback>{people[item.actor].initials}</AvatarFallback>
</Avatar>
<div style={{ display: 'grid', gap: 'var(--spacing-2)', flex: 1, minWidth: 0 }}>
<Text size={2} style={{ overflowWrap: 'anywhere' }}>
{item.unread && <VisuallyHidden asChild><span>Unread: </span></VisuallyHidden>}
<Text size={2} fontWeight={600}>{people[item.actor].name}</Text>
{` ${item.action} `}
<Link
href={`?notification=${item.id}`}
onClick={(event) => {
event.preventDefault();
markRead(item.id);
}}
>
{item.target}
</Link>
</Text>
{item.quote && <Text size={2} className='nt-quote'>{item.quote}</Text>}
<Text size={1} style={{ color: 'var(--label-tertiary)' }}>{item.time}</Text>
{item.request === 'pending' && (
<div style={{ display: 'flex', gap: 'var(--spacing-4)', marginBlockStart: 'var(--spacing-2)' }}>
<Button size='xs' type='button' onClick={() => respond(item.id, 'approved')} aria-label={`Approve ${people[item.actor].name}’s request`}>Approve</Button>
<Button size='xs' type='button' {...ghost} onClick={() => respond(item.id, 'declined')} aria-label={`Decline ${people[item.actor].name}’s request`}>Decline</Button>
</div>
)}
{item.request === 'approved' && <Text size={2} style={{ color: 'var(--label-secondary)' }}>Access granted</Text>}
{item.request === 'declined' && <Text size={2} style={{ color: 'var(--label-secondary)' }}>Request declined</Text>}
</div>
<span style={{ display: 'flex', justifyContent: 'center', flexShrink: 0, inlineSize: 'var(--spacing-16)' }}>
{item.unread && (
<IconButton size='xs' type='button' {...quiet} aria-label={`Mark as read: ${item.target}`} onClick={() => markRead(item.id)} style={{ '--icon-button-size': '24px' } as CSSProperties}>
<span className='nt-dot' />
</IconButton>
)}
</span>
</li>
))}
</ul>
</section>
))}
</div>
<Separator />
<div style={{ display: 'flex', justifyContent: 'center', padding: 'var(--spacing-4)' }}>
<Button size='xs' asChild {...quiet}>
<a
href={`#${id}-settings`}
onClick={(event) => {
event.preventDefault();
setOpen(false);
settingsRef.current?.scrollIntoView({ block: 'start' });
settingsRef.current?.focus({ preventScroll: true });
}}
>
Notification settings
</a>
</Button>
</div>
</PopoverContent>
</Popover>
<Avatar size='sm' role='img' aria-label='Elena Moreau' title='Elena Moreau'>
<AvatarFallback>EM</AvatarFallback>
</Avatar>
</header>
<form noValidate onSubmit={save} aria-labelledby={`${id}-settings`} style={{ display: 'grid', gap: 'var(--spacing-12)' }}>
<div style={{ display: 'grid', gap: 'var(--spacing-2)' }}>
<Heading ref={settingsRef} tabIndex={-1} id={`${id}-settings`} as='h1' size={7} fontWeight={700} style={{ outline: 'none', scrollMarginBlockStart: 'var(--spacing-40)' }}>Notifications</Heading>
<Text size={3} style={{ color: 'var(--label-secondary)' }}>Choose what reaches you and where. In-app notifications live under the bell.</Text>
</div>
<section aria-labelledby={`${id}-delivery`} style={{ display: 'grid', gap: 'var(--spacing-6)' }}>
<Heading id={`${id}-delivery`} as='h2' size={4} fontWeight={600}>Delivery</Heading>
<div
role='region'
aria-labelledby={`${id}-delivery`}
tabIndex={0}
style={{ minWidth: 0, overflowX: 'auto', border: '1px solid', borderColor: errors.requests ? 'var(--color-error)' : 'var(--separator-opaque)', borderRadius: 'var(--radius-4)', background: 'var(--surface-primary)' }}
>
<Table fullWidth edgePadded style={{ borderStyle: 'hidden' }}>
<TableHead>
<TableRow>
<TableHeading scope='col' dataAlign='start' style={{ fontSize: 'var(--font-size-2)' }}>Event</TableHeading>
{channels.map((channel) => <TableHeading key={channel.key} scope='col' dataAlign='center' style={{ width: 1, whiteSpace: 'nowrap', fontSize: 'var(--font-size-2)' }}>{channel.label}</TableHeading>)}
</TableRow>
</TableHead>
<TableBody>
{events.map((row) => (
<TableRow key={row.key}>
<TableHeading scope='row' dataAlign='start' style={{ fontWeight: 400 }}>
<span style={{ display: 'grid', gap: 'var(--spacing-1)', minWidth: 0 }}>
<Text size={3} fontWeight={500}>{row.label}</Text>
<Text size={2} className='nt-description'>{row.description}</Text>
</span>
</TableHeading>
{channels.map((channel, index) => {
const available = !row.only || row.only.includes(channel.key);
return (
<TableData key={channel.key} dataAlign='center'>
{!available && <Text size={2} aria-label='Not available' style={{ color: 'var(--label-quaternary)' }}>—</Text>}
{available && (
<Checkbox style={{ display: 'inline-flex' }}>
<CheckboxInput
data-field={row.key === 'requests' && index === 0 ? 'requests' : undefined}
aria-label={`${row.label} by ${channel.label.toLowerCase()}`}
aria-invalid={row.key === 'requests' && errors.requests !== undefined}
aria-describedby={row.key === 'requests' && errors.requests ? `${id}-requests-error` : undefined}
checked={preferences[row.key][channel.key]}
onChange={() => toggleChannel(row.key, channel.key)}
/>
<CheckboxIndicator>
<CheckboxCheckedIcon />
</CheckboxIndicator>
</Checkbox>
)}
</TableData>
);
})}
</TableRow>
))}
</TableBody>
</Table>
</div>
{errors.requests && <HelperText id={`${id}-requests-error`} error>{errors.requests}</HelperText>}
</section>
<Card style={{ alignItems: 'stretch', gap: 'var(--spacing-12)' }}>
<div style={{ ...field, maxWidth: 360 }}>
<Label htmlFor={`${id}-pause`}>Pause notifications</Label>
<Select
value={pause}
onChangeValue={(value) => {
setPause(value ?? 'off');
edit();
}}
>
<SelectCombobox id={`${id}-pause`} aria-describedby={`${id}-pause-hint`}>
<SelectValue />
<SelectIcon />
</SelectCombobox>
<SelectListbox>
{pauses.map((option) => <SelectOption key={option.value} value={option.value}>{option.label}</SelectOption>)}
</SelectListbox>
</Select>
<HelperText id={`${id}-pause-hint`}>
{pause === 'off' ? 'Pausing stops email and push. The bell keeps collecting everything.' : `Email and push are paused ${pauses.find((option) => option.value === pause)?.label.toLowerCase()}.`}
</HelperText>
</div>
<Separator />
<div style={{ display: 'grid', gap: 'var(--spacing-8)' }}>
<div style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', gap: 'var(--spacing-8)' }}>
<div style={{ display: 'grid', gap: 'var(--spacing-1)', minWidth: 0 }}>
<Label htmlFor={`${id}-quiet`}>Quiet hours</Label>
<Text id={`${id}-quiet-description`} size={2} style={{ color: 'var(--label-secondary)' }}>Hold push notifications every night and deliver them in the morning.</Text>
</div>
<Switch style={{ flexShrink: 0 }}>
<SwitchInput
id={`${id}-quiet`}
checked={quietHours}
aria-describedby={`${id}-quiet-description`}
onChange={(event) => {
setQuietHours(event.currentTarget.checked);
setErrors({ ...errors, from: undefined, to: undefined });
edit();
}}
/>
<SwitchIndicator />
</Switch>
</div>
{quietHours && (
<fieldset style={{ display: 'grid', gap: 'var(--spacing-3)', margin: 0, padding: 0, border: 0, minWidth: 0 }}>
<legend style={{ padding: 0 }}><VisuallyHidden>Quiet hours range</VisuallyHidden></legend>
<div style={{ display: 'flex', flexWrap: 'wrap', alignItems: 'flex-start', gap: 'var(--spacing-8)' }}>
<div style={{ ...field, flex: '0 1 160px' }}>
<Label htmlFor={`${id}-from`}>From</Label>
<TimeField
value={quietFrom}
error={errors.from !== undefined}
onChangeValue={(value) => {
setQuietFrom(value);
setErrors({ ...errors, from: undefined, to: undefined });
edit();
}}
>
<TimeFieldInput id={`${id}-from`} data-field='from' placeholder='hh:mm' aria-invalid={errors.from !== undefined} aria-describedby={describe('from')} />
</TimeField>
{errors.from && <HelperText id={`${id}-from-error`} error>{errors.from}</HelperText>}
</div>
<div style={{ ...field, flex: '0 1 160px' }}>
<Label htmlFor={`${id}-to`}>To</Label>
<TimeField
value={quietTo}
error={errors.to !== undefined}
onChangeValue={(value) => {
setQuietTo(value);
setErrors({ ...errors, to: undefined });
edit();
}}
>
<TimeFieldInput id={`${id}-to`} data-field='to' placeholder='hh:mm' aria-invalid={errors.to !== undefined} aria-describedby={describe('to')} />
</TimeField>
{errors.to && <HelperText id={`${id}-to-error`} error>{errors.to}</HelperText>}
</div>
</div>
<HelperText id={`${id}-quiet-hint`}>Times are in Berlin (CET). A range past midnight ends the next morning.</HelperText>
</fieldset>
)}
</div>
</Card>
<div style={{ display: 'grid', gap: 'var(--spacing-8)' }}>
<VisuallyHidden asChild>
<div role='status'>{saved ? 'Preferences saved' : ''}</div>
</VisuallyHidden>
{saved && (
<Alert variant='success'>
<AlertIcon />
<AlertMain>
<AlertTitle>Preferences saved</AlertTitle>
<AlertContent>{pause === 'off' ? 'New notifications follow these settings right away.' : 'Saved. Email and push stay paused until the pause ends.'}</AlertContent>
</AlertMain>
</Alert>
)}
<div style={{ display: 'flex', flexWrap: 'wrap', justifyContent: 'flex-end', gap: 'var(--spacing-4)' }}>
<Button
size='xs'
type='button'
{...ghost}
onClick={() => {
setPreferences(initialPreferences);
setPause('off');
setQuietHours(true);
setQuietFrom('22:00');
setQuietTo('07:00');
setErrors({});
edit();
}}
>
Reset to defaults
</Button>
<Button size='xs' type='submit'>Save preferences</Button>
</div>
</div>
</form>
</div>
);
}