Image validation using Zod

imageSchema.ts

import { z } from 'zod';

const MAX_FILE_SIZE = 1024 * 1024 * 1;
const ACCEPTED_IMAGE_MIME_TYPES = [
  'image/jpeg',
  'image/jpg',
  'image/png',
];

export const imageSchema = z.object({
    image: z
    .any()
    .optional()
    .refine((files) => {
      if (!files || !files[0]) return true;
      return files[0].size <= MAX_FILE_SIZE;
    }, `The max size is 1MB.`)
    .refine((files) => {
      if (!files || !files[0]) return true;
      return ACCEPTED_IMAGE_MIME_TYPES.includes(files[0].type);
    }, 'Only .jpg, .jpeg, .png are supported.'),
})