Fix type

apps/backend/src/utils/requestValidator.ts

@@ -1,7 +1,33 @@
 import { zValidator } from "@hono/zod-validator";
 import DashboardError from "../errors/DashboardError";
-
+import type {
-type ValidatorParameters = Parameters<typeof zValidator>;
+	Context,
+	MiddlewareHandler,
+	Env,
+	ValidationTargets,
+	TypedResponse,
+	Input,
+} from "hono";
+import type { z, ZodError } from "zod";
+export type Hook<T, E extends Env, P extends string, O = {}> = (
+	result:
+		| {
+				success: true;
+				data: T;
+		  }
+		| {
+				success: false;
+				error: ZodError;
+				data: T;
+		  },
+	c: Context<E, P>
+) =>
+	| Response
+	| Promise<Response>
+	| void
+	| Promise<Response | void>
+	| TypedResponse<O>;
+type HasUndefined<T> = undefined extends T ? true : false;
 
 /**
  * Creates a request validator using the Zod schema.
@@ -12,11 +38,60 @@ type ValidatorParameters = Parameters<typeof zValidator>;
  * the second is options for the Zod validator, and the third is a custom error handler.
  * @returns A middleware function that validates the request against the provided schema.
  */
-const requestValidator = (...parameters: ValidatorParameters) => {
+function requestValidator<
+	T extends z.ZodType<any, z.ZodTypeDef, any>,
+	Target extends keyof ValidationTargets,
+	E extends Env,
+	P extends string,
+	In = z.input<T>,
+	Out = z.output<T>,
+	I extends Input = {
+		in: HasUndefined<In> extends true
+			? {
+					[K in Target]?:
+						| (K extends "json"
+								? In
+								: HasUndefined<
+											keyof ValidationTargets[K]
+									  > extends true
+									? {
+											[K2 in keyof In]?:
+												| ValidationTargets[K][K2]
+												| undefined;
+										}
+									: {
+											[K2_1 in keyof In]: ValidationTargets[K][K2_1];
+										})
+						| undefined;
+				}
+			: {
+					[K_1 in Target]: K_1 extends "json"
+						? In
+						: HasUndefined<
+									keyof ValidationTargets[K_1]
+							  > extends true
+							? {
+									[K2_2 in keyof In]?:
+										| ValidationTargets[K_1][K2_2]
+										| undefined;
+								}
+							: {
+									[K2_3 in keyof In]: ValidationTargets[K_1][K2_3];
+								};
+				};
+		out: { [K_2 in Target]: Out };
+	},
+	V extends I = I,
+>(
+	target: Target,
+	schema: T,
+	hook?: Hook<z.TypeOf<T>, E, P, {}> | undefined
+): MiddlewareHandler<E, P, V> {
+	//@ts-ignore
 	return zValidator(
-		parameters[0],
+		target,
-		parameters[1],
+		schema,
-		parameters[2] ??
+		hook ??
 			((result) => {
 				if (!result.success) {
 					let errors = result.error.flatten().fieldErrors as Record<
@@ -38,6 +113,6 @@ const requestValidator = (...parameters: ValidatorParameters) => {
 				}
 			})
 	);
-};
+}
 
 export default requestValidator;