subtree(users/wpcarro): docking briefcase at '24f5a642'

git-subtree-dir: users/wpcarro
git-subtree-mainline: 464bbcb15c
git-subtree-split: 24f5a642af
Change-Id: I6105b3762b79126b3488359c95978cadb3efa789

users/wpcarro/website/habit-screens/src/Utils.elm

@@ -0,0 +1,37 @@
+module Utils exposing (..)
+
+import Html exposing (..)
+import Html.Attributes exposing (..)
+import Maybe.Extra
+
+
+type Strategy
+    = Always String
+    | When Bool String
+    | If Bool String String
+
+
+class : List Strategy -> Attribute msg
+class classes =
+    classes
+        |> List.map
+            (\strategy ->
+                case strategy of
+                    Always x ->
+                        Just x
+
+                    When True x ->
+                        Just x
+
+                    When False _ ->
+                        Nothing
+
+                    If True x _ ->
+                        Just x
+
+                    If False _ x ->
+                        Just x
+            )
+        |> Maybe.Extra.values
+        |> String.join " "
+        |> Html.Attributes.class