1 files changed, 11 insertions, 0 deletions
diff --git a/src/client/elm/Model/Payment.elm b/src/client/elm/Model/Payment.elm
index 27d5bed..69315a9 100644
--- a/src/client/elm/Model/Payment.elm
+++ b/src/client/elm/Model/Payment.elm
@@ -10,6 +10,7 @@ module Model.Payment
   , totalPayments
   , punctual
   , monthly
+  , groupAndSortByMonth
   ) where
 
 import Date exposing (..)
@@ -18,6 +19,9 @@ import Json.Decode as Json exposing ((:=))
 import Model.User exposing (UserId, userIdDecoder)
 import Model.Date exposing (dateDecoder)
 
+import Utils.List as List
+import Utils.Date as Date
+
 perPage : Int
 perPage = 8
 
@@ -81,3 +85,10 @@ punctual = List.filter ((==) Punctual << .frequency)
 
 monthly : UserId -> Payments -> Payments
 monthly userId = List.filter (\p -> p.frequency == Monthly && p.userId == userId)
+
+groupAndSortByMonth : Payments -> List ((Int, Int), Payments)
+groupAndSortByMonth payments =
+  payments
+    |> List.groupBy (\payment -> (Date.year payment.creation, Date.monthToNum << Date.month <| payment.creation))
+    |> List.sortBy fst
+    |> List.reverse