feat(loyalty): remind customers before balances expire

Adds what the customer sees of expiry (docs/prd-point-coin.md F6, F12,
PC-504).

GET /customer/wallet/expiring lists everything that will expire, per
currency and day, soonest first. GET /customer/wallet already had the
nearest expiry per currency.

The expiry job now also sends reminders, with the settings of note N4 as
decided: once, reminder_days before (7 by default, 0 for none), per
currency. A customer gets one FCM push per currency and expiry day,
however many lots make it up: "150 EnakPoint akan kedaluwarsa pada 31 Okt
2026. Pakai sebelum hangus.", with type WALLET_EXPIRING, the currency,
amount and expiry_date in its data. Reminders cover whatever falls within
the window, so a run that was missed catches up rather than skipping a day.

Migration 000097 adds wallet_expiry_reminders, one row per customer,
currency and expiry day. The row is written before the push is sent, so
several instances of the job or a restart never remind twice; a push that
then fails is logged and not retried. Lots that expire later on the same
day as an earlier reminder are not reminded of again.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
efrilm
2026-09-30 14:35:12 +07:00
co-authored by Claude Opus 5.5
parent d293786cde
commit 550122f29c
17 changed files with 374 additions and 11 deletions
@@ -47,6 +47,9 @@ type WalletQueryRepository interface {
// NearestExpiring returns, per currency, the earliest day after asOf on which some
// balance expires, and how much expires that day.
NearestExpiring(ctx context.Context, customerID uuid.UUID, asOf time.Time) ([]WalletExpiringAmount, error)
// ExpiringByDay returns, per currency and day, everything that expires after asOf,
// soonest first.
ExpiringByDay(ctx context.Context, customerID uuid.UUID, asOf time.Time) ([]WalletExpiringAmount, error)
// ListTransactions returns a page of the ledger, newest first, and the total count.
ListTransactions(ctx context.Context, filter WalletTransactionFilter) ([]entities.WalletTransaction, int64, error)
// OrganizationOutstanding sums every wallet balance of an organization.
@@ -181,3 +184,19 @@ func (r *walletQueryRepository) OrganizationOutstanding(ctx context.Context, org
}
return totals.Points, totals.Coins, nil
}
func (r *walletQueryRepository) ExpiringByDay(ctx context.Context, customerID uuid.UUID, asOf time.Time) ([]WalletExpiringAmount, error) {
var rows []WalletExpiringAmount
err := DBFromContext(ctx, r.db).WithContext(ctx).Raw(`
SELECT currency, to_char((expires_at AT TIME ZONE ?)::date, 'YYYY-MM-DD') AS date,
SUM(remaining_amount) AS amount
FROM wallet_lots
WHERE customer_id = ? AND remaining_amount > 0 AND expires_at > ?
GROUP BY currency, date
ORDER BY date, currency`, walletDisplayTimeZone, customerID, asOf).
Scan(&rows).Error
if err != nil {
return nil, fmt.Errorf("failed to list expiring wallet balance: %w", err)
}
return rows, nil
}