From 340c9d6101a7531b2d167ed59ac0ba56ae4b8f7c Mon Sep 17 00:00:00 2001
From: bholmesdev <hey@bholmes.dev>
Date: Tue, 23 Apr 2024 14:34:26 -0400
Subject: [PATCH] feat: basic validationError class

---
 packages/actions/src/runtime/utils.ts | 16 ++++++++++++++++
 packages/actions/src/virtual.ts       |  8 +++++++-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/packages/actions/src/runtime/utils.ts b/packages/actions/src/runtime/utils.ts
index 73a2c2b1ec..24048c870c 100644
--- a/packages/actions/src/runtime/utils.ts
+++ b/packages/actions/src/runtime/utils.ts
@@ -1,5 +1,6 @@
 import type { APIContext } from 'astro';
 import { AsyncLocalStorage } from 'node:async_hooks';
+import type { ZodError } from 'zod';
 
 export const ApiContextStorage = new AsyncLocalStorage<APIContext>();
 
@@ -18,3 +19,18 @@ export async function getAction(pathKeys: string[]): Promise<Function> {
 	}
 	return actionLookup;
 }
+
+export class ActionError extends Error {
+	constructor(message: string) {
+		super(message);
+	}
+}
+
+export class ValidationError extends ActionError {
+	error: ZodError;
+
+	constructor(error: ZodError) {
+		super('Failed to validate');
+		this.error = error;
+	}
+}
diff --git a/packages/actions/src/virtual.ts b/packages/actions/src/virtual.ts
index 4aeaff9141..a43f14976d 100644
--- a/packages/actions/src/virtual.ts
+++ b/packages/actions/src/virtual.ts
@@ -1,3 +1,5 @@
+import { ValidationError } from './runtime/utils.js';
+
 function toActionProxy(
 	actionCallback = {},
 	aggregatedPath = '/_actions/'
@@ -21,7 +23,11 @@ function toActionProxy(
 					body,
 					headers,
 				});
-				return res.json();
+				const json = await res.json();
+				if (res.status === 400) {
+					throw new ValidationError(json);
+				}
+				return json;
 			}
 			action.toString = () => path;
 			// recurse to construct queries for nested object paths