wine-shop/src/server/actions/addWine.ts

'use server'
import { ZodError, z } from 'zod';
import { db } from '../db/index'
import { wines } from '../db/schema'
import { QueryResult } from 'pg';

type NewWine = typeof wines.$inferInsert;

export type InsertResult = {
  name: string;
  producer: string;
  id: string;
  createdAt: Date;
  updatedAt: Date | null;
  
}[];
export type Fields = {
  name: FormDataEntryValue | null
  producer: FormDataEntryValue | null;
}

export type FormState = {
  message: string | QueryResult<never>;
  errors: Record<keyof Fields, string> | undefined;
  fieldValues: NewWine;
}

const schema = z.object({
  name: z.string(),
  producer: z.string().uuid(),
})

export const addWine = async (
  prevState: FormState,
  formData: FormData): Promise<FormState>  => {
  const newWine: NewWine = {
    name: formData.get('name') as string,
    producer: formData.get('producer') as string
  }
  try {
    schema.parse(newWine)

    await db.insert(wines).values(newWine);
    return {
      message: 'success',
      errors: undefined,
      fieldValues: {
        name: "",
        producer: ""
      }
    }
  } catch (error) {
    const zodError = error as ZodError;
    const errorMap = zodError.flatten().fieldErrors;
    return {
      message: "error",
      errors: {
        name: errorMap["name"]?.[0] ?? "",
        producer: errorMap["producer"]?.[0] ?? ""
      },
      fieldValues: {
        name: newWine.name,
        producer: newWine.producer
      }
    }
  }
  }