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April 25, 2017 22:00
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| module Main exposing (..) | |
| import Html exposing (Html, text, div, ul, li) | |
| import Http | |
| import Json.Decode as Decode | |
| import Json.Decode.Pipeline as Pipeline | |
| main = | |
| Html.program | |
| { init = init | |
| , view = view | |
| , update = update | |
| , subscriptions = \_ -> Sub.none | |
| } | |
| type alias Model = | |
| { issues : List Issue | |
| , message : String | |
| } | |
| type alias Issue = | |
| { id : Int | |
| , title : String | |
| } | |
| type Msg | |
| = FetchGithubIssues (Result Http.Error (List Issue)) | |
| githubRepo : String | |
| githubRepo = | |
| """ | |
| { | |
| github { | |
| repo(ownerUsername: "nodejs", name: "node") { | |
| id | |
| name | |
| issues(limit: 1) { | |
| id | |
| state | |
| title | |
| } | |
| } | |
| } | |
| } | |
| """ | |
| issueDecoder : Decode.Decoder Issue | |
| issueDecoder = | |
| Pipeline.decode Issue | |
| |> Pipeline.required "id" Decode.int | |
| |> Pipeline.required "title" Decode.string | |
| request : Http.Request (List Issue) | |
| request = | |
| let | |
| encoded = | |
| Http.encodeUri githubRepo | |
| decoder = | |
| Decode.at [ "data", "github", "repo", "issues" ] <| | |
| Decode.list issueDecoder | |
| in | |
| Http.get ("https://www.graphqlhub.com/graphql?query=" ++ encoded) decoder | |
| init : ( Model, Cmd Msg ) | |
| init = | |
| { issues = [] | |
| , message = "Waiting for a response... " | |
| } | |
| ! [ Http.send FetchGithubIssues request ] | |
| update : Msg -> Model -> ( Model, Cmd Msg ) | |
| update msg model = | |
| case msg of | |
| FetchGithubIssues (Ok issues) -> | |
| { model | issues = issues, message = "Got issues!" } ! [] | |
| FetchGithubIssues (Err res) -> | |
| { model | message = toString res } ! [] | |
| listItem : String -> Html Msg | |
| listItem str = | |
| li [] [ text str ] | |
| view : Model -> Html Msg | |
| view model = | |
| let | |
| items = | |
| List.map (listItem << .title) model.issues | |
| issuesList = | |
| ul [] items | |
| in | |
| div [] [ text model.message, issuesList ] |
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