From d57ea4eda1339ae55f1f1f6341d1af6b1a690330 Mon Sep 17 00:00:00 2001
From: Joris Guyonvarch
Date: Sat, 21 Mar 2015 15:57:37 +0100
Subject: Can remove numbers in timer edition

---
 src/Update/UpdateTimerEdition.elm | 35 +++++++++++++++++++++++++----------
 1 file changed, 25 insertions(+), 10 deletions(-)

(limited to 'src/Update/UpdateTimerEdition.elm')

diff --git a/src/Update/UpdateTimerEdition.elm b/src/Update/UpdateTimerEdition.elm
index cff39f7..e9493eb 100644
--- a/src/Update/UpdateTimerEdition.elm
+++ b/src/Update/UpdateTimerEdition.elm
@@ -1,19 +1,34 @@
 module Update.UpdateTimerEdition
   ( updateTimerEdition
+  , TimerEditionAction(..)
   ) where
 
 import Char (..)
 
 import Model.TimerEdition (..)
 
-updateTimerEdition : Maybe Char -> TimerEdition -> TimerEdition
-updateTimerEdition maybeChar timerEdition =
-  case maybeChar of
-    Just char ->
-      if isDigit char
-        then
-          { timerEdition | numbers <- char :: timerEdition.numbers }
-        else
+import Utils.List (..)
+
+type TimerEditionAction =
+  DeleteLast
+  | AddNumber KeyCode
+
+updateTimerEdition : TimerEditionAction -> TimerEdition -> TimerEdition
+updateTimerEdition action timerEdition =
+  case action of
+    DeleteLast ->
+      case maybeTail timerEdition.numbers of
+        Just tailNumbers ->
+          { timerEdition | numbers <- tailNumbers }
+        Nothing ->
+          timerEdition
+    AddNumber keyCode ->
+      case keyCodeToNumberChar keyCode of
+        Just char ->
+          if isDigit char
+            then
+              { timerEdition | numbers <- char :: timerEdition.numbers }
+            else
+              timerEdition
+        Nothing ->
           timerEdition
-    Nothing ->
-      timerEdition
-- 
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