1 files changed, 56 insertions, 0 deletions
diff --git a/src/Timer/Update.elm b/src/Timer/Update.elm
new file mode 100644
index 0000000..31e8a43
--- /dev/null
+++ b/src/Timer/Update.elm
@@ -0,0 +1,56 @@
+module Timer.Update exposing
+  ( updateTimer
+  )
+
+import Time exposing (Time)
+
+import Model.Id exposing (..)
+
+import Timer.Model exposing (..)
+import Timer.Model.State exposing (..)
+import Timer.Msg exposing (..)
+
+updateTimer : Msg -> Timer -> Timer
+updateTimer msg timer =
+  case msg of
+
+    Rename name ->
+      { timer | name = Just name }
+
+    Pause ->
+      { timer | state = Idle }
+
+    ToggleRunning ->
+      { timer
+      | state =
+          if timer.time > 0 && timer.state == Idle
+            then Running
+            else Idle
+      }
+
+    Stop ->
+      { timer
+      | time = timer.initialTime
+      , state = Idle
+      }
+
+    SetTime time ->
+      { timer
+      | initialTime = time
+      , time = time
+      }
+
+    SubstractTime time ->
+      if timer.state == Running
+        then
+          let newTime = timer.time - time
+          in  if newTime <= 0.0
+                then
+                  { timer
+                  | time = 0.0
+                  , state = Ringing
+                  }
+                else
+                  { timer | time = newTime }
+        else
+          timer