# Mass Email Notifications

Modern replacement for the four PHP scripts under
`email.notifications/send*.php` that fired bulk emails off the legacy
`utility_dbo.email_alert_log` table. Lives in this codebase from
`massive-email-notification` onward; the PHP scripts stay operational
until the office flips over.

## Why

The legacy scripts did three things this app needed to keep doing: send
outstanding-payment reminders, send payment-confirmation letters, and
fire account-status alerts (red and yellow). They also sent a fourth
trust-payment confirmation tied to `TRUSTHFEE`. Each was a separate CGI
script the office hit manually or via cron, talking to `utility_dbo` over
the same `mysqli` connection as the rest of the portal.

The unified schema (see [`PLAN.md`](../PLAN.md) and
[`docs/INSURANCE_FEATURES_SPEC.md`](INSURANCE_FEATURES_SPEC.md)) folded
`datosfreak` and `TRUSTHFEE` into `customers` + `transactions` +
`trust_accounts`, so the scripts' SQL no longer maps to anything. Rather
than maintain parallel sync code to keep `utility_dbo` populated, this
feature ports the four jobs onto the unified data and writes its own log.

## What ships

- `apps/api/src/mail/` — outbound mail transport. Amazon SES (matches
  the `StorageService` env-driven optional-client pattern). Dev falls
  back to stdout logging so a fresh checkout can exercise the jobs
  without SES credentials.
- `apps/api/src/notifications/` — the four jobs (`outstanding`,
  `payment-confirm`, `account-status`, `trust-confirm`), each a public
  service method + a `POST /notifications/{slug}` HTTP endpoint gated on
  the new `notification:send` ability (MANAGER).
- `packages/database/prisma/migrations/20260801200000_mass_email_notifications/migration.sql`
  — two new tables (`email_notification_log`, `account_status_history`)
  with enums and FKs to `customers`.
- `apps/web/src/app/notificaciones/` — admin page with 4 trigger cards,
  a flags panel, a transport-status header, and a paginated log browser.

## Job semantics

Preserved from the PHP originals (see
`~/Documents/Claude-Memory/email-notifications-spec.md`):

| Job | Recipients | Subject | Response key |
|---|---|---|---|
| 1. Outstanding payments | Customers with ≥1 outstanding Transaction (amount<0) | "Jorge Cuadros - Outstanding Payments" | `result:"success", notificationType:"sendPaymentConfirmation"` |
| 2. Payment confirmation | Customers with a credit in last 24h | "Jorge Cuadros - Payment Confirmation" | `request:"success", notificationType:"sendPaymentConfirmation"` |
| 3. Account status | All customers with a balance; yellow/red thresholds | "Jorge Cuadros - Account Status Alert" | `request:"success", notificationType:"sendAccountStatus"` |
| 4. Trust confirmation | Customers with TrustAccount + recent TRUST-domain credit | "Jorge Cuadros - Trust Payment Confirmation" | `request:"success", notificationType:"sendTrustPaymentConfirmation"` |

Wire shapes match the PHP originals byte-for-byte so anything downstream
that scrapes `notificationType:"sendPaymentConfirmation"` keeps working.
Job 1 reports `result` (not `request`) and `notificationType` literally
`sendPaymentConfirmation` — these are the legacy quirks, preserved.

### Day gates (Job 3 only)

- **Yellow** ("DEBAJO DEL TIPO"): Wed only (or `ignoreDayRestriction`).
- **Red** ("EN ROJO"): Mon/Wed/Fri only (or `ignoreDayRestriction`).
- A customer who is red on Tuesday is logged as `SKIPPED_GATE` until
  Wed, when both checks can fire on the same row.

### Threshold logic (Job 3)

The PHP used `datosfreak.TIPO` (50/100/200/300/500) and a hardcoded
threshold table. The new schema encodes this as `Customer.minimumBalance`:

- Yellow: `0 ≤ balance < minimumBalance`
- Red: `balance < 0`

Per-currency balance uses `BillingService.balances()` semantics (signed
`SUM(transactions.amount)`, voided + outstanding excluded), so a
yellow/red alert always lines up with what the receivables worklist shows
staff. The customer-servicing letter reports in USD because the legacy
letter was always USD; the union of `balanceUsd` and `balanceMxn` is
reported per-customer, never collapsed (see `BillingService.balances()`).

### Rate limit (Job 3 only)

`useEmailLimit=true` enables a vestigial throttle: pause the sweep 1h
after 100 sends. Off by default; SES does not need it.

## Tables

### `email_notification_log`

One row per send attempt (sent, failed, skipped). Carries the rendered
body verbatim so a customer reply quoting an old email can be traced to
the exact letter sent. SES MessageId stored for bounce/complaint
correlation.

Indexes: `(sendDate)`, `(notificationType, sendDate)`, `(customerId, sendDate)`.

### `account_status_history`

Mirrors the legacy `utility_dbo.send_account_status_history` table:
`(customerId, customerName, customerEmail, tipo, tCambio, balance,
solicitado, level)`. `tipo` is the literal `"DEBAJO DEL TIPO"` or
`"EN ROJO"` string the PHP used. `solicitado` keeps the legacy formula
(`0 - TIPO - BALANCE`) even though it double-subtracts; downstream
reports depend on the exact figure.

Indexes: `(sendDate)`, `(customerId, sendDate)`, `(level, sendDate)`.

## Environment

```
SES_REGION=us-east-1
SES_ACCESS_KEY=...
SES_SECRET_KEY=...
SES_FROM=mail@jorgecuadros.com
SES_FROM_NAME=Information Server
SES_CONFIGURATION_SET=...      # optional
NOTIFICATION_ADMIN_EMAILS=rmancinas@freakma.net,mpulido@freakma.net
```

Without SES_* the API still boots and `MailService` falls back to stdout
in dev (`NODE_ENV !== "production"`). In production every send throws
`ServiceUnavailableException` and the row is recorded as `FAILED`.

## UI

`/notificaciones` (gated on `notification:send`) — four trigger cards,
a debug/ignoreDayRestriction/useEmailLimit flags panel, a transport
status header, and a paginated log table. STAFF users see the log
read-only.

## Cron (future)

The four service methods (`runOutstandingPayments`, `runPaymentConfirmation`,
`runAccountStatus`, `runTrustConfirmation`) are the entry points. A future
`@nestjs/schedule` cron would call them on the legacy cadence (Job 3 on
Mon/Wed/Fri, Job 2 daily, Jobs 1 + 4 ad-hoc). Pattern matches
`OpsService`'s single-running-job guard: one `email_notification_sweep`
OpsJob per run, with its log streamed to `OpsJob.log`.

## What is intentionally NOT in scope

- Per-recipient preview / HTML view in the UI. The log table shows what
  was sent; previewing one requires fetching `bodySnapshot` and rendering
  HTML in the browser, deferred until a customer-service need surfaces.
- Bounce / complaint webhooks. `providerMessageId` is captured so a future
  SNS topic can write back; the integration itself is a separate piece
  of work.
- Spanish / English body toggle. Legacy letters are English; the legacy
  customer base is bilingual. `Customer` has no language preference.
  Add one when the need is concrete (same open question as
  [`INSURANCE_FEATURES_SPEC.md`](INSURANCE_FEATURES_SPEC.md) §1.6).
- Importing the legacy `utility_dbo.email_alert_log` rows. They reference
  the old `NUMid` (a stringified double) which no longer maps to a
  unified customer; an import would be destructive.