Add part11

part11/ElmHub.elm

@@ -0,0 +1,150 @@
+module ElmHub exposing (..)
+
+import Html exposing (..)
+import Html.Attributes exposing (class, target, href, defaultValue, type', checked, placeholder, value)
+import Html.Events exposing (..)
+import Html.App as Html
+import Json.Decode exposing (Decoder)
+import Json.Decode.Pipeline exposing (..)
+import Search
+import Tuple2
+
+
+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 =
+    { results : List SearchResult
+    , errorMessage : Maybe String
+    , search : Search.Model
+    }
+
+
+type alias SearchResult =
+    { id : Int
+    , name : String
+    , stars : Int
+    }
+
+
+initialModel : Model
+initialModel =
+    { results = []
+    , errorMessage = Nothing
+    , search = Search.initialModel
+    }
+
+
+type Msg
+    = SearchMsg Search.Msg
+    | DeleteById Int
+    | HandleSearchResponse (List SearchResult)
+    | HandleSearchError (Maybe String)
+    | DoNothing
+
+
+init : ( Model, Cmd Msg )
+init =
+    -- TODO Incorporate Search.init
+    --
+    -- Search.init has the type ( Search.Model, Cmd Search.Msg )
+    -- which we will convert to ( Model,        Cmd Msg )
+    --
+    -- Use Tuple2.mapEach to translate, by passing functions with these types:
+    --
+    -- (Search.Model -> Model)
+    -- (Cmd Search.Msg -> Cmd Msg)
+    --
+    -- For reference:
+    --
+    -- mapEach : (a -> newA) -> (b -> newB) -> ( a, b ) -> ( newA, newB )
+    ( initialModel, Cmd.none )
+
+
+update : Msg -> Model -> ( Model, Cmd Msg )
+update msg model =
+    case msg of
+        SearchMsg searchMsg ->
+            -- TODO Call Search.update passing the appropriate two arguments.
+            --
+            -- Then, since Search.update's return type is the same as Search.init,
+            -- use the same process as we did with Search.init and init
+            -- to translate between Search.update and update.
+            --
+            -- HINT: When you're done here, don't forget the TODO in Search.elm!
+            Search.update searchMsg model.search
+                |> Tuple2.mapEach (\search -> { model | search = search }) (Cmd.map SearchMsg)
+
+        HandleSearchResponse results ->
+            ( { model | results = results }, Cmd.none )
+
+        HandleSearchError error ->
+            ( { model | errorMessage = error }, Cmd.none )
+
+        DeleteById idToHide ->
+            let
+                newResults =
+                    model.results
+                        |> List.filter (\{ id } -> id /= idToHide)
+
+                newModel =
+                    { model | results = newResults }
+            in
+                ( newModel, Cmd.none )
+
+        DoNothing ->
+            ( model, Cmd.none )
+
+
+view : Model -> Html Msg
+view model =
+    div [ class "content" ]
+        [ header []
+            [ h1 [] [ text "ElmHub" ]
+            , span [ class "tagline" ] [ text "Like GitHub, but for Elm things." ]
+            ]
+        , Html.map SearchMsg (Search.view model.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" ]
+        ]
+
+
+decodeGithubResponse : Json.Decode.Value -> Msg
+decodeGithubResponse value =
+    case Json.Decode.decodeValue responseDecoder value of
+        Ok results ->
+            HandleSearchResponse results
+
+        Err err ->
+            HandleSearchError (Just err)