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import type {
AdminCreateNotificationResponse,
AdminNotificationDeliveryMode,
} from '@/models/admin';
import { ApiError } from '@/services/api';
import { createAdminNotification } from '@/services/adminService';
const UUID_RE = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
interface NotificationForm {
targetUserInput: string;
targetUserIds: string[];
deliveryMode: AdminNotificationDeliveryMode;
title: string;
body: string;
type: string;
deepLink: string;
eventId: string;
dataText: string;
}
const INITIAL_FORM: NotificationForm = {
targetUserInput: '',
targetUserIds: [],
deliveryMode: 'IN_APP',
title: '',
body: '',
type: '',
deepLink: '',
eventId: '',
dataText: '',
};
type NotificationField = keyof NotificationForm;
type FieldErrors = Partial<Record<NotificationField, string>>;
function parseUserIds(value: string): string[] {
return Array.from(new Set(value.split(/[\s,]+/).map((item) => item.trim()).filter(Boolean)));
}
function parseData(value: string): Record<string, string> | undefined {
const trimmed = value.trim();
if (!trimmed) return undefined;
const parsed = JSON.parse(trimmed) as unknown;
if (!parsed || typeof parsed !== 'object' || Array.isArray(parsed)) {
throw new Error('Data must be a JSON object.');
}
const data: Record<string, string> = {};
Object.entries(parsed).forEach(([key, entry]) => {
if (typeof entry !== 'string') {
throw new Error('Data values must be strings.');
}
data[key] = entry;
});
return data;
}
function apiErrorMessage(err: unknown, fallback: string): string {
if (err instanceof ApiError) {
const details = err.details ? Object.values(err.details).filter(Boolean).join(' ') : '';
return details ? `${err.message} ${details}` : err.message;
}
return fallback;
}
export function useAdminNotificationViewModel(token: string | null) {
const [form, setForm] = useState<NotificationForm>(INITIAL_FORM);
const [fieldErrors, setFieldErrors] = useState<FieldErrors>({});
const [submitError, setSubmitError] = useState<string | null>(null);
const [result, setResult] = useState<AdminCreateNotificationResponse | null>(null);
const [isSubmitting, setIsSubmitting] = useState(false);
const targetUserIds = useMemo(() => form.targetUserIds, [form.targetUserIds]);
function setField<K extends NotificationField>(field: K, value: NotificationForm[K]) {
setForm((current) => ({ ...current, [field]: value }));
setFieldErrors((current) => ({ ...current, [field]: undefined }));
setSubmitError(null);
}
function addTargetUser() {
const values = parseUserIds(form.targetUserInput);
if (values.length === 0) {
setFieldErrors((current) => ({ ...current, targetUserInput: 'Enter a user ID.' }));
return;
}
const invalid = values.find((id) => !UUID_RE.test(id));
if (invalid) {
setFieldErrors((current) => ({ ...current, targetUserInput: 'User IDs must be valid UUIDs.' }));
return;
}
setForm((current) => ({
...current,
targetUserInput: '',
targetUserIds: Array.from(new Set([...current.targetUserIds, ...values])),
}));
setFieldErrors((current) => ({ ...current, targetUserInput: undefined }));
setSubmitError(null);
}
function removeTargetUser(userId: string) {
setForm((current) => ({
...current,
targetUserIds: current.targetUserIds.filter((id) => id !== userId),
}));
setFieldErrors((current) => ({ ...current, targetUserInput: undefined }));
}
async function submit(): Promise<boolean> {
const errors: FieldErrors = {};
if (targetUserIds.length === 0) {
const pendingTargets = parseUserIds(form.targetUserInput);
errors.targetUserInput = pendingTargets.some((id) => !UUID_RE.test(id))
? 'User IDs must be valid UUIDs.'
: 'Add at least one user ID.';
} else if (targetUserIds.some((id) => !UUID_RE.test(id))) {
errors.targetUserInput = 'User IDs must be valid UUIDs.';
}
if (!form.title.trim()) errors.title = 'Title is required.';
if (!form.body.trim()) errors.body = 'Body is required.';
if (form.eventId.trim() && !UUID_RE.test(form.eventId.trim())) {
errors.eventId = 'Event ID must be a valid UUID.';
}
let data: Record<string, string> | undefined;
try {
data = parseData(form.dataText);
} catch (err) {
errors.dataText = err instanceof Error ? err.message : 'Data must be valid JSON.';
}
setFieldErrors(errors);
setResult(null);
if (Object.keys(errors).length > 0) return false;
if (!token) {
setSubmitError('Admin session is not available.');
return false;
}
setIsSubmitting(true);
setSubmitError(null);
try {
const response = await createAdminNotification(token, {
user_ids: targetUserIds,
delivery_mode: form.deliveryMode,
title: form.title.trim(),
body: form.body.trim(),
type: form.type.trim() || null,
deep_link: form.deepLink.trim() || null,
event_id: form.eventId.trim() || null,
data,
});
setResult(response);
return true;
} catch (err) {
setSubmitError(apiErrorMessage(err, 'Failed to send notification.'));
return false;
} finally {
setIsSubmitting(false);
}
}
return {
form,
fieldErrors,
submitError,
result,
isSubmitting,
targetUserIds,
setField,
addTargetUser,
removeTargetUser,
submit,
};
}
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