route.ts

import { db } from '@/lib/db'
import { getCurrentUser } from '@/lib/session'
import { UsernameValidator } from '@/lib/validations/username'
import { z } from 'zod'

export async function PATCH(req: Request) {
    try {
        const session = await getCurrentUser()

        if (!session) {
            return new Response('Unauthorized', { status: 401 })
        }

        const body = await req.json()
        const { name } = UsernameValidator.parse(body)

        // check if username is taken
        const username = await db.user.findFirst({
            where: {
                username: name,
            },
        })

        if (username) {
            return new Response('Username is taken', { status: 409 })
        }

        // update username
        await db.user.update({
            where: {
                id: session.id,
            },
            data: {
                username: name,
            },
        })

        return new Response('OK')
    } catch (error) {
        (error)

        if (error instanceof z.ZodError) {
            return new Response(error.message, { status: 400 })
        }

        return new Response(
            'Could not update username at this time. Please try later',
            { status: 500 }
        )
    }
}