# MystBin ! - signup-form.tsx
"use client";

import { getInputProps, useForm } from "@conform-to/react";
import { getZodConstraint, parseWithZod } from "@conform-to/zod";
import { signup } from "~/app/actions/auth";
import { signupSchema } from "~/lib/schema/auth";
import { useActionState } from "react";
import { Button } from "./ui/button";
import { Input } from "./ui/input";
import { Label } from "./ui/label";

export function SignupForm() {
  const [lastResult, action, isSubmitting] = useActionState(signup, undefined);
  const [form, fields] = useForm({
    id: "signup",
    lastResult,
    constraint: getZodConstraint(signupSchema),
    shouldValidate: "onBlur",
    onValidate({ formData }) {
      return parseWithZod(formData, { schema: signupSchema });
    },
  });
  return (
    <form
      className="flex flex-col gap-2"
      id={form.id}
      onSubmit={form.onSubmit}
      action={action}
      noValidate
    >
      <div>
        <Label htmlFor={fields.firstName.id}>First Name:</Label>
        <Input
          placeholder="First Name"
          {...getInputProps(fields.firstName, { type: "text" })}
        />
        <p>{fields.firstName.errors?.join(", ")}</p>
      </div>

      <div>
        <Label htmlFor={fields.lastName.id}>Last Name:</Label>
        <Input
          placeholder="Last Name"
          {...getInputProps(fields.lastName, { type: "text" })}
        />
        <p>{fields.lastName.errors?.join(", ")}</p>
      </div>

      <div>
        <Label htmlFor={fields.email.id}>Email:</Label>
        <Input
          placeholder="example@email.com"
          {...getInputProps(fields.email, { type: "email" })}
        />
        <p>{fields.email.errors?.join(", ")}</p>
      </div>

      <div>
        <Label htmlFor={fields.password.id}>Password:</Label>
        <Input {...getInputProps(fields.password, { type: "password" })} />
        <p>{fields.password.errors?.join(", ")}</p>
      </div>

      <Button className="mt-2" type="submit" disabled={isSubmitting}>
        Sign up
      </Button>
    </form>
  );
}




# MystBin ! - auth.ts
"use server";

import { parseWithZod } from "@conform-to/zod";
import { signupSchema } from "~/lib/schema/auth";
import { signUpEmail } from "~/server/auth";
import { APIError } from "better-auth/api";

export async function signup(prevState: unknown, formData: FormData) {
  const submission = parseWithZod(formData, { schema: signupSchema });

  if (submission.status !== "success") {
    return submission.reply();
  }

  const { firstName, lastName, email, password } = submission.value;

  try {
    await signUpEmail({
      body: {
        name: `${firstName} ${lastName}`,
        email,
        password,
      },
    });
  } catch (error) {
    if (error instanceof APIError) {
      return submission.reply({
        fieldErrors: { email: ["Email already exists"] },
        resetForm: false,
      });
    }
  }
}