Reorganize stages into parts

part7/ElmHub.elm

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+module ElmHub (..) where
+
+import Html exposing (..)
+import Html.Attributes exposing (..)
+import Html.Events exposing (..)
+import Http
+import Task exposing (Task)
+import Effects exposing (Effects)
+import Json.Decode exposing (Decoder, (:=))
+import Json.Encode
+import Signal exposing (Address)
+
+
+searchFeed : Address String -> String -> Task x Action
+searchFeed address query =
+  let
+    -- See https://developer.github.com/v3/search/#example for how to customize!
+    url =
+      "https://api.github.com/search/repositories?q="
+        ++ query
+        ++ "+language:elm&sort=stars&order=desc"
+
+    -- These only talk to JavaScript ports now. They don't
+    -- actually do any actions themselves.
+    task =
+      Signal.send address query
+        |> Task.map (\_ -> DoNothing)
+  in
+    Task.onError task (\_ -> Task.succeed DoNothing)
+
+
+responseDecoder : Decoder (List SearchResult)
+responseDecoder =
+  "items" := Json.Decode.list searchResultDecoder
+
+
+searchResultDecoder : Decoder SearchResult
+searchResultDecoder =
+  Json.Decode.object3
+    SearchResult
+    ("id" := Json.Decode.int)
+    ("full_name" := Json.Decode.string)
+    ("stargazers_count" := Json.Decode.int)
+
+
+type alias Model =
+  { query : String
+  , results : List SearchResult
+  }
+
+
+type alias SearchResult =
+  { id : ResultId
+  , name : String
+  , stars : Int
+  }
+
+
+type alias ResultId =
+  Int
+
+
+initialModel : Model
+initialModel =
+  { query = "tutorial"
+  , results = []
+  }
+
+
+view : Address Action -> Model -> Html
+view address model =
+  div
+    [ class "content" ]
+    [ header
+        []
+        [ h1 [] [ text "ElmHub" ]
+        , span [ class "tagline" ] [ text "“Like GitHub, but for Elm things.”" ]
+        ]
+    , input [ class "search-query", onInput address SetQuery, defaultValue model.query ] []
+    , button [ class "search-button", onClick address Search ] [ text "Search" ]
+    , ul
+        [ class "results" ]
+        (List.map (viewSearchResult address) model.results)
+    ]
+
+
+onInput address wrap =
+  on "input" targetValue (\val -> Signal.message address (wrap val))
+
+
+defaultValue str =
+  property "defaultValue" (Json.Encode.string str)
+
+
+viewSearchResult : Address Action -> SearchResult -> Html
+viewSearchResult address 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 address (DeleteById result.id) ]
+        [ text "X" ]
+    ]
+
+
+type Action
+  = Search
+  | SetQuery String
+  | DeleteById ResultId
+  | SetResults (List SearchResult)
+  | DoNothing
+
+
+update : Address String -> Action -> Model -> ( Model, Effects Action )
+update searchAddress action model =
+  case action of
+    Search ->
+      ( model, Effects.task (searchFeed searchAddress model.query) )
+
+    SetQuery query ->
+      ( { model | query = query }, Effects.none )
+
+    SetResults results ->
+      let
+        newModel =
+          { model | results = results }
+      in
+        ( newModel, Effects.none )
+
+    DeleteById idToHide ->
+      let
+        newResults =
+          model.results
+            |> List.filter (\{ id } -> id /= idToHide)
+
+        newModel =
+          { model | results = newResults }
+      in
+        ( newModel, Effects.none )
+
+    DoNothing ->
+      ( model, Effects.none )