Add exceptions for metadata modules (#6070)

Class exception for each metadata module + handler to map on graphql
error

TODO left :
- find a way to call handler on auto-resolvers nestjs query (probably
interceptors)
- discuss what should be done for pre-hooks errors
- discuss what should be done for Unauthorized exception

packages/twenty-server/src/engine/metadata-modules/relation-metadata/utils/relation-metadata-graphql-api-exception-handler.util.ts

@@ -0,0 +1,28 @@
+import {
+  RelationMetadataException,
+  RelationMetadataExceptionCode,
+} from 'src/engine/metadata-modules/relation-metadata/relation-metadata.exception';
+import {
+  UserInputError,
+  ConflictError,
+  InternalServerError,
+  NotFoundError,
+} from 'src/engine/utils/graphql-errors.util';
+
+export const relationMetadataGraphqlApiExceptionHandler = (error: Error) => {
+  if (error instanceof RelationMetadataException) {
+    switch (error.code) {
+      case RelationMetadataExceptionCode.RELATION_METADATA_NOT_FOUND:
+        throw new NotFoundError(error.message);
+      case RelationMetadataExceptionCode.INVALID_RELATION_INPUT:
+        throw new UserInputError(error.message);
+      case RelationMetadataExceptionCode.RELATION_ALREADY_EXISTS:
+        throw new ConflictError(error.message);
+      case RelationMetadataExceptionCode.FOREIGN_KEY_NOT_FOUND:
+      default:
+        throw new InternalServerError(error.message);
+    }
+  }
+
+  throw error;
+};