@cardbrother/up-fetch/src/up.ts

Advanced fetch client builder for typescript.

import type { StandardSchemaV1 } from '@standard-schema/spec'
import { resolveOptions } from './resolve-options'
import type {
   FetcherOptions,
   DefaultOptions,
   BaseFetchFn,
   FallbackOptions,
} from './types'
import { emptyOptions, validate } from './utils'



export function up<
   TFetchFn extends BaseFetchFn,
   TDefaultParsedData = any,
   TDefaultRawBody = Parameters<FallbackOptions<any>['serializeBody']>[0],
>(
   fetchFn: TFetchFn,
   getDefaultOptions: (
      input: Parameters<TFetchFn>[0],
      fetcherOpts: FetcherOptions<TFetchFn, any, any, any>,
      ctx?: Parameters<TFetchFn>[2],
   ) => DefaultOptions<TFetchFn, TDefaultParsedData, TDefaultRawBody> = () =>
      emptyOptions,
) {
   return async <
      TParsedData = TDefaultParsedData,
      TSchema extends StandardSchemaV1<
         TParsedData,
         any
      > = StandardSchemaV1<TParsedData>,
      TRawBody = TDefaultRawBody,
   >(
      input: Parameters<TFetchFn>[0],
      fetcherOpts: FetcherOptions<
         TFetchFn,
         TSchema,
         TParsedData,
         TRawBody
      > = emptyOptions,
      ctx?: Parameters<TFetchFn>[2],
   ) => {
      let defaultOpts = getDefaultOptions(input, fetcherOpts, ctx)
      let options = resolveOptions(input, defaultOpts, fetcherOpts)

      await defaultOpts?.onRequest?.(options)
      // if (defaultOpts.onRequest && isPromise(defaultOpts.onRequest)) {
      // } else {
      //    defaultOpts.onRequest?.(options)
      // }
         return fetchFn(options.input, options, ctx)
         .catch((error) => {
            defaultOpts.onError?.(error, options)
            throw error
         })
         .then(async (response: Response) => {
            if (!(await options.reject(response))) {
               let parsed: Awaited<TParsedData>
               try {
                  parsed = await options.parseResponse(response, options)
               } catch (error: any) {
                  defaultOpts.onError?.(error, options)
                  throw error
               }
               let data: Awaited<StandardSchemaV1.InferOutput<TSchema>>
               try {
                  data = options.schema
                     ? await validate(options.schema, parsed)
                     : parsed
               } catch (error: any) {
                  defaultOpts.onError?.(error, options)
                  throw error
               }
               defaultOpts.onSuccess?.(data, options)
               return data
            } else {
               let respError: any
               try {
                  respError = await options.parseRejected(response, options)
               } catch (error: any) {
                  defaultOpts.onError?.(error, options)
                  throw error
               }
               defaultOpts.onError?.(respError, options)
               throw respError
            }
         })
   }
}