Zod image validation

imageValidationWithZod.tsx

"use client";
import { Button } from "@/components/ui/button";
import {
  Form,
  FormControl,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from "@/components/ui/form"; //shadcn ui folder
import { cn } from "@/lib/utils";
import { zodResolver } from "@hookform/resolvers/zod";
import { useState } from "react";
import { useForm } from "react-hook-form";
import { BsImages, BsPaperclip } from "react-icons/bs";
import { IoSendOutline } from "react-icons/io5";
import * as z from "zod";
const MAX_FILE_SIZE = 1024 * 1024 * 5;
const ACCEPTED_IMAGE_MIME_TYPES = [
  "image/jpeg",
  "image/jpg",
  "image/png",
  "image/webp",
];
const ACCEPTED_IMAGE_TYPES = ["jpeg", "jpg", "png", "webp"];
const formSchema = z.object({
  adImage: z
    .any()
    .refine((files) => {
      return files?.[0]?.size <= MAX_FILE_SIZE;
    }, `Max image size is 5MB.`)
    .refine(
      (files) => ACCEPTED_IMAGE_MIME_TYPES.includes(files?.[0]?.type),
      "Only .jpg, .jpeg, .png and .webp formats are supported."
    ),
});
export type ContactFormData = z.infer<typeof formSchema>;

export default function Home() {
  const [selectedImage, setSelectedImage] = useState<File | null>(null);
  const form = useForm<ContactFormData>({
    resolver: zodResolver(formSchema),
    defaultValues: {
      adImage: undefined,
    },
  });

  const onSubmit = async (data: ContactFormData) => {
    console.log(data);
  };
  return (
    <main className="flex min-h-screen flex-col items-center justify-between p-24">
      <Form {...form}>
        <form onSubmit={form.handleSubmit(onSubmit)}>
          <div className={cn("flex md:flex-row w-[100%] gap-4 flex-col")}>
            <div className="flex  w-[100%] gap-4 flex-col ">
              <FormLabel>your form title</FormLabel>
              <div
                className={`flex w-[100%] gap-4 p-4 rounded border border-neutral-200 flex-col items-center md:flex-row md:justify-between md:items-center`}
              >
                <div
                  className={`flex  md:flex-[1] h-[fit-content] md:p-4 md:justify-between md:flex-row 
                        
            `}
                >
                  {selectedImage ? (
                    <div className="md:max-w-[200px]">
                      <img
                        src={URL.createObjectURL(selectedImage)}
                        alt="Selected"
                      />
                    </div>
                  ) : (
                    <div className="inline-flex items-center justify-between">
                      <div className="p-3 bg-slate-200  justify-center items-center flex">
                        <BsImages size={56} />
                      </div>
                    </div>
                  )}
                </div>
                <FormField
                  control={form.control}
                  name="adImage"
                  render={({ field }) => (
                    <FormItem>
                      <FormControl>
                        <Button size="lg" type="button">
                          <input
                            type="file"
                            className="hidden"
                            id="fileInput"
                            accept="image/*"
                            onBlur={field.onBlur}
                            name={field.name}
                            onChange={(e) => {
                              field.onChange(e.target.files);
                              setSelectedImage(e.target.files?.[0] || null);
                            }}
                            ref={field.ref}
                          />
                          <label
                            htmlFor="fileInput"
                            className="bg-blue-500 hover:bg-blue-600 text-neutral-90  rounded-md cursor-pointer inline-flex items-center"
                          >
                            <BsPaperclip />
                            <span className="whitespace-nowrap">
                              choose your image
                            </span>
                          </label>
                        </Button>
                      </FormControl>
                      {/* <FormDescription>This is your public display email.</FormDescription> */}

                      <FormMessage />
                    </FormItem>
                  )}
                />
              </div>
            </div>
          </div>
          <div className={cn("flex w-[100%] gap-4 justify-end")}>
            <div className="space-y-2">
              <Button className="gap-1 py-4 px-4" type="submit">
                <span>SUBMIT</span>
                <IoSendOutline />
              </Button>
            </div>
          </div>
        </form>
      </Form>
    </main>
  );
}

Thank you!

However, if I want to check if the file is uploaded in the first, the resolved error message would be "Max document size is 10MB." instead of "Document is required.".

Here's the code I'm using:

document: z
  .any()
  .refine(
    (files) => !files || files?.length === 0,
    "Document is required."
  )
  .refine((files) => {
    return files?.[0]?.size <= MAX_DOCUMENT_FILE_SIZE;
  }, `Max document size is 10MB.`)
  .refine(
    (files) => ACCEPTED_DOCUMENT_MIME_TYPES.includes(files?.[0]?.type),
    "Only .pdf format is supported."
  ),

here is for file required
.refine((files) => files?.length !== 0, 'Document is required')