Add part5

advanced/part5/src/Viewer.elm

@@ -0,0 +1,71 @@
+module Viewer exposing (Viewer, cred, decoder, email, encode, profile)
+
+{-| The logged-in user currently viewing this page.
+-}
+
+import Avatar exposing (Avatar)
+import Email exposing (Email)
+import Json.Decode as Decode exposing (Decoder)
+import Json.Decode.Pipeline exposing (custom, required)
+import Json.Encode as Encode exposing (Value)
+import Profile exposing (Profile)
+import Username exposing (Username)
+import Viewer.Cred as Cred exposing (Cred)
+
+
+
+-- TYPES
+
+
+type Viewer
+    = Viewer Internals
+
+
+type alias Internals =
+    { cred : Cred
+    , profile : Profile
+    , email : Email
+    }
+
+
+
+-- INFO
+
+
+cred : Viewer -> Cred
+cred (Viewer info) =
+    info.cred
+
+
+profile : Viewer -> Profile
+profile (Viewer info) =
+    info.profile
+
+
+email : Viewer -> Email
+email (Viewer info) =
+    info.email
+
+
+
+-- SERIALIZATION
+
+
+encode : Viewer -> Value
+encode (Viewer info) =
+    Encode.object
+        [ ( "email", Email.encode info.email )
+        , ( "username", Username.encode (Cred.username info.cred) )
+        , ( "bio", Maybe.withDefault Encode.null (Maybe.map Encode.string (Profile.bio info.profile)) )
+        , ( "image", Avatar.encode (Profile.avatar info.profile) )
+        , ( "token", Cred.encodeToken info.cred )
+        ]
+
+
+decoder : Decoder Viewer
+decoder =
+    Decode.succeed Internals
+        |> custom Cred.decoder
+        |> custom Profile.decoder
+        |> required "email" Email.decoder
+        |> Decode.map Viewer