Initial attendee management

apps/backend/src/modules/attendees/lib/helpers.ts

@@ -0,0 +1,40 @@
+import type { AttendeeDto } from '@gruperly/shared';
+
+export type AttendeeRecord = {
+  id: string;
+  groupId: string;
+  fullName: string;
+  email: string | null;
+  phone: string | null;
+  guardianName: string | null;
+  guardianPhone: string | null;
+  notes: string | null;
+  createdAt: Date;
+  updatedAt: Date;
+};
+
+export function toAttendeeDto(record: AttendeeRecord): AttendeeDto {
+  return {
+    id: record.id,
+    groupId: record.groupId,
+    fullName: record.fullName,
+    email: record.email,
+    phone: record.phone,
+    guardianName: record.guardianName,
+    guardianPhone: record.guardianPhone,
+    notes: record.notes,
+    createdAt: record.createdAt.toISOString(),
+    updatedAt: record.updatedAt.toISOString(),
+  };
+}
+
+/**
+ * Normaliza números de teléfono eliminando espacios, guiones, paréntesis y puntos.
+ * Conserva el '+' si lo tiene al inicio para números internacionales.
+ */
+export function normalizePhone(rawPhone: string): string {
+  const trimmed = rawPhone.trim();
+  const hasPlus = trimmed.startsWith('+');
+  const digitsOnly = trimmed.replace(/\D/g, '');
+  return hasPlus ? `+${digitsOnly}` : digitsOnly;
+}