feat: refactor folder structure (#4498)

* feat: wip refactor folder structure

* Fix

* fix position

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/api/rest/api-rest-query-builder/utils/compute-depth.utils.ts

@@ -0,0 +1,25 @@
+import { BadRequestException } from '@nestjs/common';
+
+import { Request } from 'express';
+
+const ALLOWED_DEPTH_VALUES = [1, 2];
+
+export const computeDepth = (request: Request): number | undefined => {
+  if (!request.query.depth) {
+    return undefined;
+  }
+
+  const depth = +request.query.depth;
+
+  if (isNaN(depth) || !ALLOWED_DEPTH_VALUES.includes(depth)) {
+    throw new BadRequestException(
+      `'depth=${
+        request.query.depth
+      }' parameter invalid. Allowed values are ${ALLOWED_DEPTH_VALUES.join(
+        ', ',
+      )}`,
+    );
+  }
+
+  return depth;
+};