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https://github.com/dillonkearns/elm-pages-v3-beta.git
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102 lines
2.2 KiB
Elm
102 lines
2.2 KiB
Elm
module Effect exposing (Effect(..), batch, fromCmd, map, none, perform)
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import Browser.Navigation
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import Http
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import Json.Decode as Decode
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import Url exposing (Url)
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type Effect msg
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= None
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| Cmd (Cmd msg)
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| Batch (List (Effect msg))
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| GetStargazers (Result Http.Error Int -> msg)
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| FetchPageData
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{ body : Maybe { contentType : String, body : String }
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, path : Maybe String
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, toMsg : Result Http.Error Url -> msg
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}
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type alias RequestInfo =
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{ contentType : String
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, body : String
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}
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none : Effect msg
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none =
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None
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batch : List (Effect msg) -> Effect msg
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batch =
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Batch
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fromCmd : Cmd msg -> Effect msg
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fromCmd =
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Cmd
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map : (a -> b) -> Effect a -> Effect b
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map fn effect =
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case effect of
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None ->
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None
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Cmd cmd ->
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Cmd (Cmd.map fn cmd)
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Batch list ->
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Batch (List.map (map fn) list)
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GetStargazers toMsg ->
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GetStargazers (toMsg >> fn)
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FetchPageData fetchInfo ->
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FetchPageData
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{ body = fetchInfo.body
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, path = fetchInfo.path
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, toMsg = fetchInfo.toMsg >> fn
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}
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perform :
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{ fetchRouteData :
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{ body : Maybe { contentType : String, body : String }
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, path : Maybe String
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, toMsg : Result Http.Error Url -> pageMsg
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}
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-> Cmd msg
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--, fromSharedMsg : Shared.Msg -> msg
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, fromPageMsg : pageMsg -> msg
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, key : Browser.Navigation.Key
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}
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-> Effect pageMsg
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-> Cmd msg
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perform ({ fetchRouteData, fromPageMsg } as info) effect =
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case effect of
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None ->
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Cmd.none
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Cmd cmd ->
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Cmd.map fromPageMsg cmd
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Batch list ->
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Cmd.batch (List.map (perform info) list)
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GetStargazers toMsg ->
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Http.get
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{ url = "https://api.github.com/repos/dillonkearns/elm-pages"
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, expect = Http.expectJson (toMsg >> fromPageMsg) (Decode.field "stargazers_count" Decode.int)
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}
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FetchPageData fetchInfo ->
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fetchRouteData
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{ body = fetchInfo.body
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, path = fetchInfo.path
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, toMsg = fetchInfo.toMsg
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}
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