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Exposed mapExpect function. #73

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Exposed mapExpect function. #73

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19 changes: 16 additions & 3 deletions src/Http.elm
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@ effect module Http where { command = MyCmd, subscription = MySub } exposing
, Header, header
, Body, emptyBody, stringBody, jsonBody, fileBody, bytesBody
, multipartBody, Part, stringPart, filePart, bytesPart
, Expect, expectString, expectJson, expectBytes, expectWhatever, Error(..)
, Expect, expectString, expectJson, expectBytes, expectWhatever, mapExpect, Error(..)
, track, Progress(..), fractionSent, fractionReceived
, cancel
, riskyRequest
Expand All @@ -26,7 +26,7 @@ effect module Http where { command = MyCmd, subscription = MySub } exposing
@docs multipartBody, Part, stringPart, filePart, bytesPart

# Expect
@docs Expect, expectString, expectJson, expectBytes, expectWhatever, Error
@docs Expect, expectString, expectJson, expectBytes, expectWhatever, mapExpect, Error

# Progress
@docs track, Progress, fractionSent, fractionReceived
Expand Down Expand Up @@ -541,6 +541,19 @@ resolve toResult response =
GoodStatus_ _ body -> Result.mapError BadBody (toResult body)


{-| Transform the messages produced by an expect.
Very similar to [`Html.map`](/packages/elm/html/latest/Html#map).

This is very rarely useful in well-structured Elm code, so definitely read the
section on [structure] in the guide before reaching for this!

[structure]: https://guide.elm-lang.org/webapps/structure.html
-}
mapExpect : (a -> msg) -> Expect a -> Expect msg
mapExpect =
Elm.Kernel.Http.mapExpect


{-| A `Request` can fail in a couple ways:

- `BadUrl` means you did not provide a valid URL.
Expand Down Expand Up @@ -950,7 +963,7 @@ cmdMap func cmd =
, headers = r.headers
, url = r.url
, body = r.body
, expect = Elm.Kernel.Http.mapExpect func r.expect
, expect = mapExpect func r.expect
, timeout = r.timeout
, tracker = r.tracker
, allowCookiesFromOtherDomains = r.allowCookiesFromOtherDomains
Expand Down