Add part14

part14/ElmHub.elm

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+port 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 Html.Lazy exposing (lazy, lazy3)
+import Auth
+import Json.Decode exposing (Decoder)
+import Json.Decode.Pipeline exposing (..)
+import String
+import Table
+
+
+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
+    , options : SearchOptions
+    , tableState : Table.State
+    }
+
+
+type alias SearchOptions =
+    { minStars : Int
+    , minStarsError : Maybe String
+    , searchIn : String
+    , userFilter : String
+    }
+
+
+type alias SearchResult =
+    { id : Int
+    , name : String
+    , stars : Int
+    }
+
+
+initialModel : Model
+initialModel =
+    { query = "tutorial"
+    , results = []
+    , errorMessage = Nothing
+    , options =
+        { minStars = 0
+        , minStarsError = Nothing
+        , searchIn = "name"
+        , userFilter = ""
+        }
+    , tableState = Table.initialSort "Stars"
+    }
+
+
+init : ( Model, Cmd Msg )
+init =
+    ( initialModel, githubSearch (getQueryString initialModel) )
+
+
+subscriptions : Model -> Sub Msg
+subscriptions _ =
+    githubResponse decodeResponse
+
+
+viewOptions : SearchOptions -> Html OptionsMsg
+viewOptions opts =
+    div [ class "search-options" ]
+        [ div [ class "search-option" ]
+            [ label [ class "top-label" ] [ text "Search in" ]
+            , select [ onChange SetSearchIn, value opts.searchIn ]
+                [ option [ value "name" ] [ text "Name" ]
+                , option [ value "description" ] [ text "Description" ]
+                , option [ value "name,description" ] [ text "Name and Description" ]
+                ]
+            ]
+        , div [ class "search-option" ]
+            [ label [ class "top-label" ] [ text "Owned by" ]
+            , input
+                [ type' "text"
+                , placeholder "Enter a username"
+                , defaultValue (Debug.log "username" opts.userFilter)
+                , onInput SetUserFilter
+                ]
+                []
+            ]
+        , div [ class "search-option" ]
+            [ label [ class "top-label" ] [ text "Minimum Stars" ]
+            , input
+                [ type' "text"
+                , onBlurWithTargetValue SetMinStars
+                , defaultValue (toString opts.minStars)
+                ]
+                []
+            , viewMinStarsError opts.minStarsError
+            ]
+        ]
+
+
+viewMinStarsError : Maybe String -> Html msg
+viewMinStarsError message =
+    case message of
+        Nothing ->
+            text " "
+
+        Just errorMessage ->
+            div [ class "stars-error" ] [ text errorMessage ]
+
+
+type Msg
+    = Search
+    | Options OptionsMsg
+    | SetQuery String
+    | DeleteById Int
+    | HandleSearchResponse (List SearchResult)
+    | HandleSearchError (Maybe String)
+    | SetTableState Table.State
+    | DoNothing
+
+
+update : Msg -> Model -> ( Model, Cmd Msg )
+update msg model =
+    case msg of
+        Options optionsMsg ->
+            ( { model | options = updateOptions optionsMsg model.options }, Cmd.none )
+
+        Search ->
+            ( model, githubSearch (getQueryString model) )
+
+        SetQuery query ->
+            ( { model | query = query }, Cmd.none )
+
+        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 )
+
+        SetTableState tableState ->
+            ( { model | tableState = tableState }, Cmd.none )
+
+        DoNothing ->
+            ( model, Cmd.none )
+
+
+onBlurWithTargetValue : (String -> msg) -> Attribute msg
+onBlurWithTargetValue toMsg =
+    on "blur" (Json.Decode.map toMsg targetValue)
+
+
+tableConfig : Table.Config SearchResult Msg
+tableConfig =
+    Table.config
+        { toId = .id >> toString
+        , toMsg = SetTableState
+        , columns = [ starsColumn, nameColumn ]
+        }
+
+
+starsColumn : Table.Column SearchResult Msg
+starsColumn =
+    Table.veryCustomColumn
+        { name = "Stars"
+        , viewData = viewStars
+        , sorter = Table.increasingOrDecreasingBy (negate << .stars)
+        }
+
+
+nameColumn : Table.Column SearchResult Msg
+nameColumn =
+    Table.veryCustomColumn
+        { name = "Name"
+        , viewData = viewSearchResult
+        , sorter = Table.increasingOrDecreasingBy .name
+        }
+
+
+updateOptions : OptionsMsg -> SearchOptions -> SearchOptions
+updateOptions optionsMsg options =
+    case optionsMsg of
+        SetMinStars minStarsStr ->
+            case String.toInt minStarsStr of
+                Ok minStars ->
+                    { options | minStars = minStars, minStarsError = Nothing }
+
+                Err _ ->
+                    { options
+                        | minStarsError =
+                            Just "Must be an integer!"
+                    }
+
+        SetSearchIn searchIn ->
+            { options | searchIn = searchIn }
+
+        SetUserFilter userFilter ->
+            { options | userFilter = userFilter }
+
+
+view : Model -> Html Msg
+view model =
+    div [ class "content" ]
+        [ header []
+            [ h1 [] [ text "ElmHub" ]
+            , span [ class "tagline" ] [ text "Like GitHub, but for Elm things." ]
+            ]
+        , div [ class "search" ]
+            [ Html.map Options (lazy viewOptions model.options)
+            , div [ class "search-input" ]
+                [ input [ class "search-query", onInput SetQuery, defaultValue model.query ] []
+                , button [ class "search-button", onClick Search ] [ text "Search" ]
+                ]
+            ]
+        , viewErrorMessage model.errorMessage
+        , lazy3 Table.view tableConfig model.tableState model.results
+        ]
+
+
+viewErrorMessage : Maybe String -> Html msg
+viewErrorMessage errorMessage =
+    case errorMessage of
+        Just message ->
+            div [ class "error" ] [ text message ]
+
+        Nothing ->
+            text ""
+
+
+viewStars : SearchResult -> Table.HtmlDetails Msg
+viewStars result =
+    Table.HtmlDetails []
+        [ span [ class "star-count" ] [ text (toString result.stars) ] ]
+
+
+viewSearchResult : SearchResult -> Table.HtmlDetails Msg
+viewSearchResult result =
+    Table.HtmlDetails []
+        [ a [ href ("https://github.com/" ++ result.name), target "_blank" ]
+            [ text result.name ]
+        , button [ class "hide-result", onClick (DeleteById result.id) ]
+            [ text "X" ]
+        ]
+
+
+type OptionsMsg
+    = SetMinStars String
+    | SetSearchIn String
+    | SetUserFilter String
+
+
+decodeGithubResponse : Json.Decode.Value -> Msg
+decodeGithubResponse value =
+    case Json.Decode.decodeValue responseDecoder value of
+        Ok results ->
+            HandleSearchResponse results
+
+        Err err ->
+            HandleSearchError (Just err)
+
+
+onChange : (String -> msg) -> Attribute msg
+onChange toMsg =
+    on "change" (Json.Decode.map toMsg Html.Events.targetValue)
+
+
+decodeResponse : Json.Decode.Value -> Msg
+decodeResponse json =
+    case Json.Decode.decodeValue responseDecoder json of
+        Err err ->
+            HandleSearchError (Just err)
+
+        Ok results ->
+            HandleSearchResponse results
+
+
+port githubSearch : String -> Cmd msg
+
+
+port githubResponse : (Json.Decode.Value -> msg) -> Sub msg
+
+
+getQueryString : Model -> String
+getQueryString model =
+    -- See https://developer.github.com/v3/search/#example for how to customize!
+    "access_token="
+        ++ Auth.token
+        ++ "&q="
+        ++ model.query
+        ++ "+in:"
+        ++ model.options.searchIn
+        ++ "+stars:>="
+        ++ (toString model.options.minStars)
+        ++ "+language:elm"
+        ++ (if String.isEmpty model.options.userFilter then
+                ""
+            else
+                "+user:" ++ model.options.userFilter
+           )