Fetch available remote tables (#4665)

* Build remote table module

* Use transactions

* Export url builder in util

---------

Co-authored-by: Thomas Trompette <thomast@twenty.com>

packages/twenty-server/src/engine/metadata-modules/remote-server/remote-table/utils/remote-table-postgres.util.ts

@@ -0,0 +1,29 @@
+import { decryptText } from 'src/engine/core-modules/auth/auth.util';
+import {
+  RemoteServerEntity,
+  RemoteServerType,
+} from 'src/engine/metadata-modules/remote-server/remote-server.entity';
+
+export const EXCLUDED_POSTGRES_SCHEMAS = [
+  'information_schema',
+  'pg_catalog',
+  'pg_toast',
+];
+
+export const buildPostgresUrl = (
+  secretKey: string,
+  remoteServer: RemoteServerEntity<RemoteServerType>,
+): string => {
+  const foreignDataWrapperOptions = remoteServer.foreignDataWrapperOptions;
+  const userMappingOptions = remoteServer.userMappingOptions;
+
+  const password = decryptText(
+    userMappingOptions.password,
+    secretKey,
+    secretKey,
+  );
+
+  const url = `postgres://${userMappingOptions.username}:${password}@${foreignDataWrapperOptions.host}:${foreignDataWrapperOptions.port}/${foreignDataWrapperOptions.dbname}`;
+
+  return url;
+};