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elm-0.19-workshop/part7/ElmHub.elm
Richard Feldman dee37fa458 Update tagline
2016-08-19 03:44:01 -07:00

137 lines
3.5 KiB
Elm

module ElmHub exposing (..)
import Html exposing (..)
import Html.Attributes exposing (class, target, href, property, defaultValue)
import Html.Events exposing (..)
import Auth
import Json.Decode exposing (Decoder)
import Json.Decode.Pipeline exposing (..)
getQueryString : String -> String
getQueryString query =
-- See https://developer.github.com/v3/search/#example for how to customize!
"access_token="
++ Auth.token
++ "&q="
++ query
++ "+language:elm&sort=stars&order=desc"
responseDecoder : Decoder (List SearchResult)
responseDecoder =
Json.Decode.at [ "items" ] (Json.Decode.list searchResultDecoder)
searchResultDecoder : Decoder SearchResult
searchResultDecoder =
decode SearchResult
|> required "id" Json.Decode.int
|> required "full_name" Json.Decode.string
|> required "stargazers_count" Json.Decode.int
type alias Model =
{ query : String
, results : List SearchResult
, errorMessage : Maybe String
}
type alias SearchResult =
{ id : ResultId
, name : String
, stars : Int
}
type alias ResultId =
Int
initialModel : Model
initialModel =
{ query = "tutorial"
, results = []
, errorMessage = Nothing
}
view : Model -> Html Msg
view model =
div [ class "content" ]
[ header []
[ h1 [] [ text "ElmHub" ]
, span [ class "tagline" ] [ text "Like GitHub, but for Elm things." ]
]
, input [ class "search-query", onInput SetQuery, defaultValue model.query ] []
, button [ class "search-button", onClick Search ] [ text "Search" ]
, viewErrorMessage model.errorMessage
, ul [ class "results" ] (List.map viewSearchResult model.results)
]
viewErrorMessage : Maybe String -> Html a
viewErrorMessage errorMessage =
case errorMessage of
Just message ->
div [ class "error" ] [ text message ]
Nothing ->
text ""
viewSearchResult : SearchResult -> Html Msg
viewSearchResult result =
li []
[ span [ class "star-count" ] [ text (toString result.stars) ]
, a [ href ("https://github.com/" ++ result.name), target "_blank" ]
[ text result.name ]
, button [ class "hide-result", onClick (DeleteById result.id) ]
[ text "X" ]
]
type Msg
= Search
| SetQuery String
| DeleteById ResultId
| HandleSearchResponse (List SearchResult)
| HandleSearchError (Maybe String)
update : (String -> Cmd Msg) -> Msg -> Model -> ( Model, Cmd Msg )
update searchFeed msg model =
case msg of
Search ->
( model, searchFeed (getQueryString model.query) )
SetQuery query ->
( { model | query = query }, Cmd.none )
HandleSearchResponse results ->
( { model | results = results }, Cmd.none )
HandleSearchError error ->
( { model | errorMessage = error }, Cmd.none )
DeleteById idToDelete ->
let
newResults =
model.results
|> List.filter (\{ id } -> id /= idToDelete)
newModel =
{ model | results = newResults }
in
( newModel, Cmd.none )
decodeGithubResponse : Json.Decode.Value -> Msg
decodeGithubResponse value =
-- TODO use Json.Decode.DecodeValue to decode the response into a Msg.
--
-- Hint: look at the definition of Msg and
-- the definition of responseDecoder
HandleSearchError (Just "TODO decode the response!")