From 763217dfdf2579ecc22d27dfd57853e9ac7b355f Mon Sep 17 00:00:00 2001
From: Mathis <avnyr@yidhra.fr>
Date: Tue, 9 Jul 2024 16:02:17 +0200
Subject: [PATCH] feat(pipes): add zod filter and zod pipe

This commit introduces two new files: zod.pipe.filter.ts and zod.pipe.ts. The `ZodFilter` catches ZodErrors and defines the HTTP response json format. The `ZodPipe` validates incoming data against a predefined schema.
---
 src/pipes/zod.pipe.filter.ts | 17 +++++++++++++++++
 src/pipes/zod.pipe.ts        | 13 +++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 src/pipes/zod.pipe.filter.ts
 create mode 100644 src/pipes/zod.pipe.ts

diff --git a/src/pipes/zod.pipe.filter.ts b/src/pipes/zod.pipe.filter.ts
new file mode 100644
index 0000000..c08c61a
--- /dev/null
+++ b/src/pipes/zod.pipe.filter.ts
@@ -0,0 +1,17 @@
+import { ArgumentsHost, Catch, ExceptionFilter, HttpStatus } from "@nestjs/common";
+import { ZodError } from "zod";
+
+
+@Catch(ZodError)
+export class ZodFilter<T extends ZodError> implements ExceptionFilter {
+  catch(exception: T, host: ArgumentsHost) {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse();
+    const status = HttpStatus.BAD_REQUEST;
+    response.status(status).json({
+      errors: exception.errors,
+      message: exception.message,
+      statusCode: status,
+    });
+  }
+}
\ No newline at end of file
diff --git a/src/pipes/zod.pipe.ts b/src/pipes/zod.pipe.ts
new file mode 100644
index 0000000..c96e68f
--- /dev/null
+++ b/src/pipes/zod.pipe.ts
@@ -0,0 +1,13 @@
+import { ArgumentMetadata, Injectable, PipeTransform } from "@nestjs/common";
+import { z } from "zod";
+
+
+@Injectable()
+export class ZodPipe implements PipeTransform {
+  constructor(private readonly schema: z.ZodObject<any>) {}
+
+  transform(value: any, metadata: ArgumentMetadata) {
+    this.schema.parse(value);
+    return value;
+  }
+}
\ No newline at end of file