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import { derived, get, readable } from 'svelte/store'
import { noop, notifyManager } from '@tanstack/query-core'
import { useIsRestoring } from './useIsRestoring.js'
import { useQueryClient } from './useQueryClient.js'
import { isSvelteStore } from './utils.js'
import type {
QueryClient,
QueryKey,
QueryObserver,
QueryObserverResult,
} from '@tanstack/query-core'
import type {
CreateBaseQueryOptions,
CreateBaseQueryResult,
StoreOrVal,
} from './types.js'
export function createBaseQuery<
TQueryFnData,
TError,
TData,
TQueryData,
TQueryKey extends QueryKey,
>(
options: StoreOrVal<
CreateBaseQueryOptions<TQueryFnData, TError, TData, TQueryData, TQueryKey>
>,
Observer: typeof QueryObserver,
queryClient?: QueryClient,
): CreateBaseQueryResult<TData, TError> {
/** Load query client */
const client = useQueryClient(queryClient)
const isRestoring = useIsRestoring()
/** Converts options to a svelte store if not already a store object */
const optionsStore = isSvelteStore(options) ? options : readable(options)
/** Creates a store that has the default options applied */
const defaultedOptionsStore = derived(
[optionsStore, isRestoring],
([$optionsStore, $isRestoring]) => {
const defaultedOptions = client.defaultQueryOptions($optionsStore)
defaultedOptions._optimisticResults = $isRestoring
? 'isRestoring'
: 'optimistic'
return defaultedOptions
},
)
/** Creates the observer */
const observer = new Observer<
TQueryFnData,
TError,
TData,
TQueryData,
TQueryKey
>(client, get(defaultedOptionsStore))
defaultedOptionsStore.subscribe(($defaultedOptions) => {
observer.setOptions($defaultedOptions)
})
const result = derived<
typeof isRestoring,
QueryObserverResult<TData, TError>
>(isRestoring, ($isRestoring, set) => {
const unsubscribe = $isRestoring
? noop
: observer.subscribe(notifyManager.batchCalls(set))
observer.updateResult()
return unsubscribe
})
/** Subscribe to changes in result and defaultedOptionsStore */
const { subscribe } = derived(
[result, defaultedOptionsStore],
([$result, $defaultedOptionsStore]) => {
$result = observer.getOptimisticResult($defaultedOptionsStore)
return !$defaultedOptionsStore.notifyOnChangeProps
? observer.trackResult($result)
: $result
},
)
return { subscribe }
}
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