internal-utils.ts

import type { NextParsedUrlQuery } from './request-meta'

import { NEXT_RSC_UNION_QUERY } from '../client/components/app-router-headers'

const INTERNAL_QUERY_NAMES = [
  '__nextFallback',
  '__nextLocale',
  '__nextInferredLocaleFromDefault',
  '__nextDefaultLocale',
  '__nextIsNotFound',
  NEXT_RSC_UNION_QUERY,
] as const

const EDGE_EXTENDED_INTERNAL_QUERY_NAMES = ['__nextDataReq'] as const

export function stripInternalQueries(query: NextParsedUrlQuery) {
  for (const name of INTERNAL_QUERY_NAMES) {
    delete query[name]
  }
}

export function stripInternalSearchParams<T extends string | URL>(
  url: T,
  isEdge: boolean
): T {
  const isStringUrl = typeof url === 'string'
  const instance = isStringUrl ? new URL(url) : (url as URL)
  for (const name of INTERNAL_QUERY_NAMES) {
    instance.searchParams.delete(name)
  }

  if (isEdge) {
    for (const name of EDGE_EXTENDED_INTERNAL_QUERY_NAMES) {
      instance.searchParams.delete(name)
    }
  }

  return (isStringUrl ? instance.toString() : instance) as T
}