Relay transactional email through Salesforce instead of SMTP (#9)

Reviewed-on: #9
Co-authored-by: Patrick Müller <patrick@mueller-patrick.tech>
Co-committed-by: Patrick Müller <patrick@mueller-patrick.tech>

src/models/tickets/admin/redemptions.admin.service.ts

@@ -1,5 +1,6 @@
 import {NachklangTicketsDB} from '../Tickets.db';
 import {getEventTicketState} from '../tickets.capacity';
+import {recordConfirmationEmailResult, sendRedemptionConfirmation} from '../tickets.confirmation-email';
 import {AuditLogEntry, RedemptionSummary} from '../tickets.interface';
 import {isValidEmail} from '../tickets.validation';
 
@@ -13,7 +14,8 @@ const mapRedemptionRow = (row: any, guests: string[]): RedemptionSummary => ({
 	contactAddress: row.contact_address,
 	guestCount: row.guest_count,
 	guests,
-	redeemedAt: row.redeemed_at
+	redeemedAt: row.redeemed_at,
+	confirmationEmailStatus: row.confirmation_email_status ?? null
 });
 
 export interface ListRedemptionsFilter {
@@ -227,6 +229,29 @@ export const editRedemption = async (redemptionId: number, input: EditRedemption
 	}
 };
 
+export type ResendConfirmationResult = 'SENT' | 'FAILED' | 'NOT_FOUND' | 'NOT_ACTIVE';
+
+/**
+ * Rebuilds and re-sends the redemption confirmation email from the stored
+ * redemption data, then records the new outcome on the row. Used by the admin
+ * UI's "resend" action on a redemption whose confirmation email failed. Only
+ * active redemptions can be resent.
+ */
+export const resendRedemptionConfirmation = async (redemptionId: number): Promise<ResendConfirmationResult> => {
+	const redemption = await getRedemption(redemptionId);
+	if (!redemption) return 'NOT_FOUND';
+	if (redemption.status !== 'ACTIVE') return 'NOT_ACTIVE';
+
+	const sent = await sendRedemptionConfirmation({
+		eventId: redemption.eventId,
+		contactName: redemption.contactName,
+		contactEmail: redemption.contactEmail,
+		guestNames: redemption.guests
+	});
+	await recordConfirmationEmailResult(redemptionId, sent);
+	return sent ? 'SENT' : 'FAILED';
+};
+
 export const getAuditHistory = async (code: string): Promise<AuditLogEntry[]> => {
 	let conn = await NachklangTicketsDB.getConnection();
 	try {