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* Event Participants Tab Component (GREEN Phase)
*
* Container for the participants view within EventPage.
* Story 3.3: Event Participants Tab - Task 8 (GREEN Phase)
*
* Features:
* - Displays participant count badge
* - Renders participant list for specific event
* - Name-badge XLSX export (auto-participant-email-aliases-excel-export)
* - Name-badge DOCX export (Avery L4784 + BAT logo, printable physical badges)
*/
import React, { useState } from 'react';
import {
Box,
Typography,
Chip,
Stack,
LinearProgress,
Button,
Alert,
Snackbar,
} from '@mui/material';
import {
People as PeopleIcon,
Download as DownloadIcon,
Article as ArticleIcon,
GroupAdd as GroupAddIcon,
PersonAdd as PersonAddIcon,
} from '@mui/icons-material';
import { useTranslation } from 'react-i18next';
import type { Event } from '@/types/event.types';
import EventParticipantList from '@/components/organizer/EventPage/EventParticipantList';
import { AddParticipantDialog } from '@/components/organizer/EventPage/AddParticipantDialog';
import { eventApiClient } from '@/services/eventApiClient';
import { enrollStakeholders } from '@/services/api/eventRegistrationService';
interface EventParticipantsTabProps {
event: Event;
}
const EventParticipantsTab: React.FC<EventParticipantsTabProps> = ({ event }) => {
const { t } = useTranslation('events');
const [isExporting, setIsExporting] = useState(false);
const [isExportingDocx, setIsExportingDocx] = useState(false);
const [exportError, setExportError] = useState<string | null>(null);
// Add participant (organizer manually adds an existing user as confirmed).
const [addOpen, setAddOpen] = useState(false);
// Enrol organizers & partners (Epic 14 FR25 — moved here from the Overview).
const [enrolling, setEnrolling] = useState(false);
const [enrollSnackbar, setEnrollSnackbar] = useState<{
open: boolean;
message: string;
severity: 'success' | 'error';
}>({ open: false, message: '', severity: 'success' });
const handleEnrollStakeholders = async (): Promise<void> => {
setEnrolling(true);
try {
const result = await enrollStakeholders(event.eventCode);
setEnrollSnackbar({
open: true,
message: t(
'eventPage.overview.enrollStakeholdersSuccess',
'Enrolled {{enrolled}} organizers/partners ({{skipped}} already registered)',
{ enrolled: result.enrolled, skipped: result.skipped }
),
severity: 'success',
});
} catch {
setEnrollSnackbar({
open: true,
message: t('eventPage.overview.enrollStakeholdersError', 'Failed to enroll stakeholders'),
severity: 'error',
});
} finally {
setEnrolling(false);
}
};
const capacity = (event as { registrationCapacity?: number | null }).registrationCapacity ?? null;
const confirmedCount = (event as { confirmedCount?: number }).confirmedCount ?? 0;
const waitlistCount = (event as { waitlistCount?: number }).waitlistCount ?? 0;
// Badge: total active registrations (registered + confirmed + waitlist, no cancelled)
const activeTotal = confirmedCount + waitlistCount;
const fillPct =
capacity != null && capacity > 0 ? Math.min(100, (confirmedCount / capacity) * 100) : 0;
const isFull = capacity != null && confirmedCount >= capacity;
const handleExport = async (): Promise<void> => {
setExportError(null);
setIsExporting(true);
let objectUrl: string | null = null;
try {
const blob = await eventApiClient.exportParticipantsXlsx(event.eventCode);
objectUrl = URL.createObjectURL(blob);
const anchor = document.createElement('a');
anchor.href = objectUrl;
anchor.download = `${event.eventCode}-namensschilder.xlsx`;
document.body.appendChild(anchor);
anchor.click();
document.body.removeChild(anchor);
} catch (error) {
const message = error instanceof Error ? error.message : t('event.participants.exportError');
console.error('[EventParticipantsTab] Export failed:', error);
setExportError(message);
} finally {
if (objectUrl) {
// Slight delay so the browser has time to start the download before revoking.
setTimeout(() => URL.revokeObjectURL(objectUrl as string), 100);
}
setIsExporting(false);
}
};
const handleExportDocx = async (): Promise<void> => {
setExportError(null);
setIsExportingDocx(true);
let objectUrl: string | null = null;
try {
const blob = await eventApiClient.exportParticipantsDocx(event.eventCode);
objectUrl = URL.createObjectURL(blob);
const anchor = document.createElement('a');
anchor.href = objectUrl;
anchor.download = `${event.eventCode}-namensschilder.docx`;
document.body.appendChild(anchor);
anchor.click();
document.body.removeChild(anchor);
} catch (error) {
const message = error instanceof Error ? error.message : t('event.participants.exportError');
console.error('[EventParticipantsTab] DOCX export failed:', error);
setExportError(message);
} finally {
if (objectUrl) {
setTimeout(() => URL.revokeObjectURL(objectUrl as string), 100);
}
setIsExportingDocx(false);
}
};
return (
<Box sx={{ py: 3 }}>
{/* Header: title row, then the action buttons on their OWN line below it — a single
row on desktop (sm+), stacked full-width on mobile (xs). (Epic 14 follow-up: the 4th
"Add participant" button no longer fits beside the title.) */}
<Stack direction="column" spacing={2} sx={{ mb: 3 }}>
<Stack direction="row" spacing={2} alignItems="center">
<PeopleIcon sx={{ fontSize: 32, color: 'primary.main' }} />
<Typography variant="h5" component="h2">
{t('eventPage.participantsTab.title')}
</Typography>
<Chip label={activeTotal} color="primary" size="small" sx={{ fontWeight: 'bold' }} />
</Stack>
<Stack direction={{ xs: 'column', sm: 'row' }} spacing={1} flexWrap="wrap" useFlexGap>
<Button
variant="contained"
startIcon={<PersonAddIcon />}
onClick={() => setAddOpen(true)}
sx={{ width: { xs: '100%', sm: 'auto' } }}
data-testid="add-participant-button"
>
{t('eventPage.participantsTab.addParticipant', 'Add participant')}
</Button>
<Button
variant="outlined"
startIcon={<DownloadIcon />}
onClick={handleExport}
disabled={isExporting || isExportingDocx}
sx={{ width: { xs: '100%', sm: 'auto' } }}
data-testid="participants-export-xlsx"
>
{t('event.participants.exportNameBadges')}
</Button>
<Button
variant="outlined"
startIcon={<ArticleIcon />}
onClick={handleExportDocx}
disabled={isExporting || isExportingDocx}
sx={{ width: { xs: '100%', sm: 'auto' } }}
data-testid="participants-export-docx"
>
{t('event.participants.exportNameBadgesDocx')}
</Button>
<Button
variant="outlined"
startIcon={<GroupAddIcon />}
onClick={handleEnrollStakeholders}
disabled={enrolling}
sx={{ width: { xs: '100%', sm: 'auto' } }}
data-testid="enroll-stakeholders-button"
>
{enrolling
? t('eventPage.overview.enrollStakeholdersLoading', 'Enrolling…')
: t('eventPage.overview.enrollStakeholders', 'Enroll Organizers & Partners')}
</Button>
</Stack>
</Stack>
<AddParticipantDialog
open={addOpen}
onClose={() => setAddOpen(false)}
eventCode={event.eventCode}
onAdded={(name) =>
setEnrollSnackbar({
open: true,
severity: 'success',
message: t('eventPage.participantsTab.addParticipantSuccess', {
name,
defaultValue: 'Added {{name}} as a confirmed participant',
}),
})
}
/>
{exportError && (
<Alert severity="error" sx={{ mb: 2 }} onClose={() => setExportError(null)}>
{exportError}
</Alert>
)}
{/* Story 10.11: Capacity progress bar (only when registrationCapacity is set) */}
{capacity != null && (
<Box sx={{ mb: 3 }}>
<Stack direction="row" justifyContent="space-between" sx={{ mb: 0.5 }}>
<Typography variant="body2" color="text.secondary">
{t('eventPage.participantsTab.capacityBar', {
confirmed: confirmedCount,
capacity,
waitlist: waitlistCount,
})}
</Typography>
</Stack>
<LinearProgress
variant="determinate"
value={fillPct}
color={isFull ? 'error' : 'primary'}
sx={{ height: 8, borderRadius: 4 }}
/>
</Box>
)}
{/* Participant List (the waitlist now lives inside this list via the
"Waitlisted" filter — Epic 14 FR28, replacing the old WaitlistSection). */}
<EventParticipantList eventCode={event.eventCode} />
<Snackbar
open={enrollSnackbar.open}
autoHideDuration={5000}
onClose={() => setEnrollSnackbar((s) => ({ ...s, open: false }))}
anchorOrigin={{ vertical: 'bottom', horizontal: 'center' }}
>
<Alert
severity={enrollSnackbar.severity}
onClose={() => setEnrollSnackbar((s) => ({ ...s, open: false }))}
>
{enrollSnackbar.message}
</Alert>
</Snackbar>
</Box>
);
};
export default EventParticipantsTab;
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