add zod safe parser

Author: omermecitoglu

.npmrc

@@ -0,0 +1 @@
+git-tag-version=false

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@omer-x/next-openapi-route-handler",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "a Next.js plugin to generate OpenAPI documentation from route handlers",
   "keywords": [
     "next.js",

package.json

@@ -1,6 +1,7 @@
+import { safeParse } from "./zod-error-handler";
 import type { ZodType } from "zod";
 
-export default function parsePathParams<T>(source: unknown, schema?: ZodType<T>) {
-  if (!schema) return null;
-  return schema.parse(source);
+export default function parsePathParams<T>(source?: T, schema?: ZodType<T>) {
+  if (!schema || !source) return null;
+  return safeParse(schema, source as Record<string, unknown>);
 }

src/core/path-params.ts

@@ -1,3 +1,4 @@
+import { safeParse } from "./zod-error-handler";
 import type { ZodType } from "zod";
 
 export default function parseSearchParams<T>(source: URLSearchParams, schema?: ZodType<T>) {
@@ -6,5 +7,5 @@ export default function parseSearchParams<T>(source: URLSearchParams, schema?: Z
     ...collection,
     [key]: value,
   }), {});
-  return schema.parse(params);
+  return safeParse(schema, params);
 }

src/core/search-params.ts

@@ -0,0 +1,20 @@
+import type { ZodType } from "zod";
+
+function convertStringToNumber(input: Record<string, unknown>, keys: string[]) {
+  return keys.reduce((mutation, key) => {
+    return { ...mutation, [key]: parseInt(mutation[key] as string) } as Record<string, unknown>;
+  }, input);
+}
+
+export function safeParse<T>(schema: ZodType<T>, input: Record<string, unknown>) {
+  const result = schema.safeParse(input);
+  if (!result.success) {
+    for (const issue of result.error.issues) {
+      if (issue.code === "invalid_type" && issue.expected === "number" && issue.received === "string") {
+        return safeParse(schema, convertStringToNumber(input, issue.path as string[]));
+      }
+    }
+    throw new Error("There are some errors left unhandled. (next-openapi-route-handler)");
+  }
+  return result.data;
+}

src/core/zod-error-handler.ts

@@ -42,7 +42,7 @@ export default function createRoute<M extends HttpMethod, PP, QP, RB>(input: Rou
   const handler: RouteMethodHandler<PP> = async (request, props) => {
     try {
       const { searchParams } = new URL(request.url);
-      const pathParams = parsePathParams(props.params, input.pathParams) as PP;
+      const pathParams = parsePathParams<PP>(props.params, input.pathParams) as PP;
       const queryParams = parseSearchParams(searchParams, input.queryParams) as QP;
       const body = await parseRequestBody(request, input.method, input.requestBody ?? undefined, input.hasFormData) as RB;
       return await input.action({ pathParams, queryParams, body });