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fetch.ts
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fetch.ts
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import type { FetchError, FetchOptions } from 'ofetch'
import type { TypedInternalResponse, NitroFetchRequest } from 'nitropack'
import { computed, unref, Ref, reactive } from 'vue'
import type { AsyncDataOptions, _Transform, KeyOfRes, AsyncData, PickFrom } from './asyncData'
import { useAsyncData } from './asyncData'
export type FetchResult<ReqT extends NitroFetchRequest> = TypedInternalResponse<ReqT, unknown>
type ComputedOptions<T extends Record<string, any>> = {
[K in keyof T]: T[K] extends Function ? T[K] : T[K] extends Record<string, any> ? ComputedOptions<T[K]> | Ref<T[K]> | T[K] : Ref<T[K]> | T[K]
}
type ComputedFetchOptions = ComputedOptions<FetchOptions>
export interface UseFetchOptions<
DataT,
Transform extends _Transform<DataT, any> = _Transform<DataT, DataT>,
PickKeys extends KeyOfRes<Transform> = KeyOfRes<Transform>
> extends AsyncDataOptions<DataT, Transform, PickKeys>, ComputedFetchOptions {
key?: string
}
export function useFetch<
ResT = void,
ErrorT = FetchError,
ReqT extends NitroFetchRequest = NitroFetchRequest,
_ResT = ResT extends void ? FetchResult<ReqT> : ResT,
Transform extends (res: _ResT) => any = (res: _ResT) => _ResT,
PickKeys extends KeyOfRes<Transform> = KeyOfRes<Transform>
> (
request: Ref<ReqT> | ReqT | (() => ReqT),
opts?: UseFetchOptions<_ResT, Transform, PickKeys>
): AsyncData<PickFrom<ReturnType<Transform>, PickKeys>, ErrorT | null>
export function useFetch<
ResT = void,
ErrorT = FetchError,
ReqT extends NitroFetchRequest = NitroFetchRequest,
_ResT = ResT extends void ? FetchResult<ReqT> : ResT,
Transform extends (res: _ResT) => any = (res: _ResT) => _ResT,
PickKeys extends KeyOfRes<Transform> = KeyOfRes<Transform>
> (
request: Ref<ReqT> | ReqT | (() => ReqT),
arg1?: string | UseFetchOptions<_ResT, Transform, PickKeys>,
arg2?: string
) {
const [opts = {}, autoKey] = typeof arg1 === 'string' ? [{}, arg1] : [arg1, arg2]
const _key = opts.key || autoKey
if (!_key || typeof _key !== 'string') {
throw new TypeError('[nuxt] [useFetch] key must be a string: ' + _key)
}
if (!request) {
throw new Error('[nuxt] [useFetch] request is missing.')
}
const key = _key === autoKey ? '$f' + _key : _key
const _request = computed(() => {
let r = request
if (typeof r === 'function') {
r = r()
}
return unref(r)
})
const {
server,
lazy,
default: defaultFn,
transform,
pick,
watch,
immediate,
...fetchOptions
} = opts
const _fetchOptions = reactive({
...fetchOptions,
cache: typeof opts.cache === 'boolean' ? undefined : opts.cache
})
const _asyncDataOptions: AsyncDataOptions<_ResT, Transform, PickKeys> = {
server,
lazy,
default: defaultFn,
transform,
pick,
immediate,
watch: [
_fetchOptions,
_request,
...(watch || [])
]
}
let controller: AbortController
const asyncData = useAsyncData<_ResT, ErrorT, Transform, PickKeys>(key, () => {
controller?.abort?.()
controller = typeof AbortController !== 'undefined' ? new AbortController() : {} as AbortController
return $fetch(_request.value, { signal: controller.signal, ..._fetchOptions }) as Promise<_ResT>
}, _asyncDataOptions)
return asyncData
}
export function useLazyFetch<
ResT = void,
ErrorT = FetchError,
ReqT extends NitroFetchRequest = NitroFetchRequest,
_ResT = ResT extends void ? FetchResult<ReqT> : ResT,
Transform extends (res: _ResT) => any = (res: _ResT) => _ResT,
PickKeys extends KeyOfRes<Transform> = KeyOfRes<Transform>
> (
request: Ref<ReqT> | ReqT | (() => ReqT),
opts?: Omit<UseFetchOptions<_ResT, Transform, PickKeys>, 'lazy'>
): AsyncData<PickFrom<ReturnType<Transform>, PickKeys>, ErrorT | null>
export function useLazyFetch<
ResT = void,
ErrorT = FetchError,
ReqT extends NitroFetchRequest = NitroFetchRequest,
_ResT = ResT extends void ? FetchResult<ReqT> : ResT,
Transform extends (res: _ResT) => any = (res: _ResT) => _ResT,
PickKeys extends KeyOfRes<Transform> = KeyOfRes<Transform>
> (
request: Ref<ReqT> | ReqT | (() => ReqT),
arg1?: string | Omit<UseFetchOptions<_ResT, Transform, PickKeys>, 'lazy'>,
arg2?: string
) {
const [opts, autoKey] = typeof arg1 === 'string' ? [{}, arg1] : [arg1, arg2]
return useFetch<ResT, ErrorT, ReqT, _ResT, Transform, PickKeys>(request, {
...opts,
lazy: true
},
// @ts-ignore
autoKey)
}