react-query/packages/svelte-query/src/queryOptions.ts

import type {
  DataTag,
  DefaultError,
  InitialDataFunction,
  NonUndefinedGuard,
  QueryKey,
} from '@tanstack/query-core'
import type { CreateQueryOptions } from './types.js'

export type UndefinedInitialDataOptions<
  TQueryFnData = unknown,
  TError = DefaultError,
  TData = TQueryFnData,
  TQueryKey extends QueryKey = QueryKey,
> = CreateQueryOptions<TQueryFnData, TError, TData, TQueryKey> & {
  initialData?: undefined | InitialDataFunction<NonUndefinedGuard<TQueryFnData>>
}

export type DefinedInitialDataOptions<
  TQueryFnData = unknown,
  TError = DefaultError,
  TData = TQueryFnData,
  TQueryKey extends QueryKey = QueryKey,
> = CreateQueryOptions<TQueryFnData, TError, TData, TQueryKey> & {
  initialData:
    | NonUndefinedGuard<TQueryFnData>
    | (() => NonUndefinedGuard<TQueryFnData>)
}

export function queryOptions<
  TQueryFnData = unknown,
  TError = DefaultError,
  TData = TQueryFnData,
  TQueryKey extends QueryKey = QueryKey,
>(
  options: DefinedInitialDataOptions<TQueryFnData, TError, TData, TQueryKey>,
): DefinedInitialDataOptions<TQueryFnData, TError, TData, TQueryKey> & {
  queryKey: DataTag<TQueryKey, TQueryFnData>
}

export function queryOptions<
  TQueryFnData = unknown,
  TError = DefaultError,
  TData = TQueryFnData,
  TQueryKey extends QueryKey = QueryKey,
>(
  options: UndefinedInitialDataOptions<TQueryFnData, TError, TData, TQueryKey>,
): UndefinedInitialDataOptions<TQueryFnData, TError, TData, TQueryKey> & {
  queryKey: DataTag<TQueryKey, TQueryFnData>
}

export function queryOptions(options: unknown) {
  return options
}