Initial commit: sap-legacy-webhook-emulator

Reconstruye el Webhook Messenger nativo de SAP B1 (FP2605) para
clientes que aun no estan en esa version: captura eventos via
SBO_SP_PostTransactionNotice, provisiona UserTables OEVC/EVC1/OEVN/EVN1
y despacha CloudEvents al mismo endpoint que el messenger real.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/dispatcher/evn1-repository.ts

@@ -0,0 +1,72 @@
+import type { ServiceLayerClient } from '../service-layer-client.ts';
+import { generateCode } from '../lib/codes.ts';
+import { hhmmss } from '../lib/timestamps.ts';
+import { userTableEntity } from '../lib/service-layer-paths.ts';
+
+const ENTITY = userTableEntity('EVN1');
+
+export interface Evn1Row {
+  code: string;
+  eventId: string;
+  webhookId: string;
+  status: string;
+  retry: number;
+}
+
+function toRow(raw: Record<string, unknown>): Evn1Row {
+  return {
+    code: raw.Code as string,
+    eventId: raw.U_EventID as string,
+    webhookId: raw.U_WebhookID as string,
+    status: raw.U_Status as string,
+    retry: (raw.U_Retry as number) ?? 0,
+  };
+}
+
+export async function findExisting(client: ServiceLayerClient, eventId: string, webhookId: string): Promise<Evn1Row | null> {
+  const filter = encodeURIComponent(`U_EventID eq '${eventId}' and U_WebhookID eq '${webhookId}'`);
+  const res = await client.get(`/${ENTITY}?$filter=${filter}`);
+  const rows = (res.data?.value as Record<string, unknown>[]) ?? [];
+  return rows.length > 0 ? toRow(rows[0]) : null;
+}
+
+export async function create(client: ServiceLayerClient, eventId: string, webhookId: string): Promise<void> {
+  await client.post(`/${ENTITY}`, {
+    Code: generateCode(),
+    Name: `${eventId}/${webhookId}`,
+    U_EventID: eventId,
+    U_WebhookID: webhookId,
+    U_Status: 'F',
+    U_Retry: 0,
+  });
+}
+
+export async function listPending(client: ServiceLayerClient): Promise<Evn1Row[]> {
+  const rows = await client.getAll(`/${ENTITY}?$filter=${encodeURIComponent("U_Status eq 'F'")}`);
+  return rows.map(toRow);
+}
+
+export async function listForEvent(client: ServiceLayerClient, eventId: string): Promise<Evn1Row[]> {
+  const rows = await client.getAll(`/${ENTITY}?$filter=${encodeURIComponent(`U_EventID eq '${eventId}'`)}`);
+  return rows.map(toRow);
+}
+
+export async function markDelivered(client: ServiceLayerClient, code: string, returnCode: number): Promise<void> {
+  const now = new Date();
+  await client.patch(`/${ENTITY}('${code}')`, {
+    U_Status: 'D',
+    U_ReturnCode: returnCode,
+    U_LastSentDT: now.toISOString(),
+    U_LastSentTM: hhmmss(now),
+  });
+}
+
+export async function markFailedAttempt(client: ServiceLayerClient, row: Evn1Row, returnCode: number): Promise<void> {
+  const now = new Date();
+  await client.patch(`/${ENTITY}('${row.code}')`, {
+    U_Retry: row.retry + 1,
+    U_ReturnCode: returnCode,
+    U_LastSentDT: now.toISOString(),
+    U_LastSentTM: hhmmss(now),
+  });
+}