Add part3

advanced/part3/src/Article/Body.elm

@@ -0,0 +1,38 @@
+module Article.Body exposing (Body, MarkdownString, decoder, toHtml, toMarkdownString)
+
+import Html exposing (Attribute, Html)
+import Json.Decode as Decode exposing (Decoder)
+import Markdown
+
+
+
+-- TYPES
+
+
+type Body
+    = Body MarkdownString
+
+
+{-| Internal use only. I want to remind myself that the string inside Body contains markdown.
+-}
+type alias MarkdownString =
+    String
+
+
+
+-- CONVERSIONS
+
+
+toHtml : Body -> List (Attribute msg) -> Html msg
+toHtml (Body markdown) attributes =
+    Markdown.toHtml attributes markdown
+
+
+toMarkdownString : Body -> MarkdownString
+toMarkdownString (Body markdown) =
+    markdown
+
+
+decoder : Decoder Body
+decoder =
+    Decode.map Body Decode.string