feat(server): introduce user friendly server errors (#7111)

packages/backend/server/src/core/utils/validators.ts

@@ -1,36 +1,23 @@
-import { BadRequestException } from '@nestjs/common';
 import z from 'zod';
 
-function assertValid<T>(z: z.ZodType<T>, value: unknown) {
-  const result = z.safeParse(value);
-
-  if (!result.success) {
-    const firstIssue = result.error.issues.at(0);
-    if (firstIssue) {
-      throw new BadRequestException(firstIssue.message);
-    } else {
-      throw new BadRequestException('Invalid credential');
-    }
-  }
-}
+import { InvalidEmail, InvalidPasswordLength } from '../../fundamentals';
 
 export function assertValidEmail(email: string) {
-  assertValid(z.string().email({ message: 'Invalid email address' }), email);
+  const result = z.string().email().safeParse(email);
+  if (!result.success) {
+    throw new InvalidEmail();
+  }
 }
 
 export function assertValidPassword(
   password: string,
   { min, max }: { min: number; max: number }
 ) {
-  assertValid(
-    z
-      .string()
-      .min(min, { message: `Password must be ${min} or more charactors long` })
-      .max(max, {
-        message: `Password must be ${max} or fewer charactors long`,
-      }),
-    password
-  );
+  const result = z.string().min(min).max(max).safeParse(password);
+
+  if (!result.success) {
+    throw new InvalidPasswordLength({ min, max });
+  }
 }
 
 export const validators = {