feat: added subscriber endpoint for fetching active cert

backend/src/services/certificate/certificate-dal.ts

@@ -3,11 +3,24 @@ import { TableName } from "@app/db/schemas";
 import { DatabaseError } from "@app/lib/errors";
 import { ormify } from "@app/lib/knex";
 
+import { CertStatus } from "./certificate-types";
+
 export type TCertificateDALFactory = ReturnType<typeof certificateDALFactory>;
 
 export const certificateDALFactory = (db: TDbClient) => {
   const certificateOrm = ormify(db, TableName.Certificate);
 
+  const findLatestActiveCertForSubscriber = async ({ subscriberId }: { subscriberId: string }) => {
+    const cert = await db
+      .replicaNode()(TableName.Certificate)
+      .where({ pkiSubscriberId: subscriberId, status: CertStatus.ACTIVE })
+      .where("notAfter", ">", new Date())
+      .orderBy("notBefore", "desc")
+      .first();
+
+    return cert;
+  };
+
   const countCertificatesInProject = async ({
     projectId,
     friendlyName,
@@ -65,6 +78,7 @@ export const certificateDALFactory = (db: TDbClient) => {
   return {
     ...certificateOrm,
     countCertificatesInProject,
-    countCertificatesForPkiSubscriber
+    countCertificatesForPkiSubscriber,
+    findLatestActiveCertForSubscriber
   };
 };