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| { | |
| "repository": "https://github.com/user/project.git", | |
| "version": "1.0.0", | |
| "elm-version": "0.18.0 <= v < 1.0.0", | |
| "summary": "Tell the world about your project!", | |
| "license": "BSD3", | |
| "source-directories": [ | |
| "." | |
| ], | |
| "exposed-modules": [], | |
| "native-modules": false, | |
| "dependencies": { | |
| "elm-lang/core": "5.1.1 <= v < 6.0.0", | |
| "elm-lang/html": "2.0.0 <= v < 3.0.0", | |
| "elm-lang/http": "1.0.0 <= v < 2.0.0" | |
| } | |
| } |
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| <html> | |
| <head> | |
| <style> | |
| html { | |
| background: #F7F7F7; | |
| color: red; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| var app = Elm.Main.fullscreen() | |
| </script> | |
| </body> | |
| </html> |
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| import Html exposing (..) | |
| import Html.Attributes exposing (..) | |
| import Html.Events exposing (..) | |
| import Http | |
| import Json.Decode as Decode | |
| main : Program Never Model Msg | |
| main = | |
| Html.program | |
| { init = init "cats" | |
| , view = view | |
| , update = update | |
| , subscriptions = subscriptions | |
| } | |
| -- MODEL | |
| type alias Model = | |
| { topic : String | |
| , gifUrl : String | |
| , error : Maybe String | |
| } | |
| init : String -> (Model, Cmd Msg) | |
| init topic = | |
| ( Model topic "waiting.gif" Nothing | |
| , getRandomGif topic | |
| ) | |
| -- UPDATE | |
| type Msg | |
| = MorePlease | |
| | NewGif (Result Http.Error String) | |
| update : Msg -> Model -> (Model, Cmd Msg) | |
| update msg model = | |
| case msg of | |
| MorePlease -> | |
| (model, getRandomGif model.topic) | |
| NewGif (Ok newUrl) -> | |
| (Model model.topic newUrl Nothing, Cmd.none) | |
| NewGif (Err _) -> | |
| ( { model | error = Just "Something went wrong." }, Cmd.none) | |
| -- VIEW | |
| view : Model -> Html Msg | |
| view model = | |
| div [] | |
| [ h2 [] [text model.topic] | |
| , button [ onClick MorePlease ] [ text "More Please!" ] | |
| , br [] [] | |
| , case model.error of | |
| Nothing -> | |
| img [src model.gifUrl] [] | |
| Just error -> | |
| div [ ] [ text error ] | |
| ] | |
| -- SUBSCRIPTIONS | |
| subscriptions : Model -> Sub Msg | |
| subscriptions model = | |
| Sub.none | |
| -- HTTP | |
| getRandomGif : String -> Cmd Msg | |
| getRandomGif topic = | |
| let | |
| url = | |
| "https://api.giphy.com/v1/gifs/random?api_key=dc6zaTOxFJmzC&tag=" ++ topic | |
| in | |
| Http.send NewGif (Http.get url decodeGifUrl) | |
| decodeGifUrl : Decode.Decoder String | |
| decodeGifUrl = | |
| Decode.at ["data", "image_url"] Decode.string |
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