Files
elm-0.19-workshop/part7/ElmHub.elm
2016-06-24 17:40:54 -07:00

142 lines
3.6 KiB
Elm

module ElmHub exposing (..)
import Auth
import Html exposing (..)
import Html.Attributes exposing (class, target, href, property, defaultValue)
import Html.Events exposing (..)
import Http
import Task exposing (Task)
import Json.Decode exposing (Decoder)
import Json.Decode.Pipeline exposing (..)
searchFeed : String -> Cmd Msg
searchFeed query =
let
url =
"https://api.github.com/search/repositories?access_token="
++ Auth.token
++ "&q="
++ query
++ "+language:elm&sort=stars&order=desc"
in
Task.perform HandleSearchError HandleSearchResponse (Http.get responseDecoder url)
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 Http.Error
update : Msg -> Model -> ( Model, Cmd Msg )
update msg model =
case msg of
Search ->
( model, searchFeed model.query )
HandleSearchResponse results ->
( { model | results = results }, Cmd.none )
HandleSearchError error ->
let
errorMessage =
case error of
Http.UnexpectedPayload message ->
Just message
_ ->
Nothing
in
( { model | errorMessage = errorMessage }, Cmd.none )
SetQuery query ->
( { model | query = query }, Cmd.none )
DeleteById idToHide ->
let
newResults =
model.results
|> List.filter (\{ id } -> id /= idToHide)
newModel =
{ model | results = newResults }
in
( newModel, Cmd.none )