4 files changed, 66 insertions, 17 deletions
diff --git a/src/client/Model/Payers.elm b/src/client/Model/Payers.elm
index 6550eaa..983e7b3 100644
--- a/src/client/Model/Payers.elm
+++ b/src/client/Model/Payers.elm
@@ -11,21 +11,23 @@ import Dict exposing (..)
 import List
 import Maybe
 
-type alias Payers = Dict String Int
+import Model.User exposing (UserId, userIdDecoder)
+
+type alias Payers = Dict UserId Int
 
 payersDecoder : Decoder Payers
 payersDecoder = Json.map Dict.fromList (list payerDecoder)
 
-payerDecoder : Decoder (String, Int)
+payerDecoder : Decoder (UserId, Int)
 payerDecoder =
   object2 (,)
-    ("userName" := string)
+    ("userId" := userIdDecoder)
     ("totalPayment" := int)
 
-updatePayers : Payers -> String -> Int -> Payers
-updatePayers payers userName amountDiff =
+updatePayers : Payers -> UserId -> Int -> Payers
+updatePayers payers userId amountDiff =
   Dict.update
-    userName
+    userId
     (\mbAmount ->
       case mbAmount of
         Just amount -> Just (amount + amountDiff)
@@ -34,7 +36,7 @@ updatePayers payers userName amountDiff =
     payers
 
 type alias ExceedingPayer =
-  { userName : String
+  { userId : UserId
   , amount : Int
   }
 
@@ -42,7 +44,7 @@ getOrderedExceedingPayers : Payers -> List ExceedingPayer
 getOrderedExceedingPayers payers =
   let orderedPayers =
         Dict.toList payers
-          |> List.map (\(userName, amount) -> ExceedingPayer userName amount)
+          |> List.map (\(userId, amount) -> ExceedingPayer userId amount)
           |> List.sortBy .amount
       maybeMinAmount =
         List.head orderedPayers
diff --git a/src/client/Model/Payment.elm b/src/client/Model/Payment.elm
index 8a51c66..4ae50de 100644
--- a/src/client/Model/Payment.elm
+++ b/src/client/Model/Payment.elm
@@ -12,6 +12,8 @@ import Date exposing (..)
 import Json.Decode as Json exposing ((:=))
 import Dict exposing (..)
 
+import Model.User exposing (UserId, userIdDecoder)
+
 perPage : Int
 perPage = 8
 
@@ -23,17 +25,17 @@ type alias Payment =
   { creation : Date
   , name : String
   , cost : Int
-  , userName : String
+  , userId : UserId
   }
 
-type alias PaymentId = String
+type alias PaymentId = Int
 
 paymentsDecoder : Json.Decoder Payments
 paymentsDecoder = Json.map Dict.fromList (Json.list paymentWithIdDecoder)
 
 paymentWithIdDecoder : Json.Decoder (PaymentId, Payment)
 paymentWithIdDecoder =
-  paymentDecoder `Json.andThen` (\payment -> Json.map (\id -> (id, payment)) ("id" := Json.string))
+  paymentDecoder `Json.andThen` (\payment -> Json.map (\id -> (id, payment)) ("id" := paymentIdDecoder))
 
 paymentDecoder : Json.Decoder Payment
 paymentDecoder =
@@ -41,10 +43,10 @@ paymentDecoder =
     ("creation" := dateDecoder)
     ("name" := Json.string)
     ("cost" := Json.int)
-    ("userName" := Json.string)
+    ("userId" := userIdDecoder)
 
 paymentIdDecoder : Json.Decoder PaymentId
-paymentIdDecoder = Json.string
+paymentIdDecoder = Json.int
 
 dateDecoder : Json.Decoder Date
 dateDecoder = Json.customDecoder Json.string Date.fromString
diff --git a/src/client/Model/User.elm b/src/client/Model/User.elm
new file mode 100644
index 0000000..b0d62a6
--- /dev/null
+++ b/src/client/Model/User.elm
@@ -0,0 +1,42 @@
+module Model.User
+  ( Users
+  , usersDecoder
+  , User
+  , userDecoder
+  , UserId
+  , userIdDecoder
+  , getUserName
+  ) where
+
+import Json.Decode as Json exposing ((:=))
+import Dict exposing (Dict)
+
+type alias Users = Dict UserId User
+
+type alias UserId = Int
+
+type alias User =
+  { name : String
+  , email : String
+  }
+
+usersDecoder : Json.Decoder Users
+usersDecoder = Json.map Dict.fromList (Json.list userWithIdDecoder)
+
+userWithIdDecoder : Json.Decoder (UserId, User)
+userWithIdDecoder =
+  userDecoder `Json.andThen` (\user -> Json.map (\id -> (id, user)) ("id" := userIdDecoder))
+
+userDecoder : Json.Decoder User
+userDecoder =
+  Json.object2 User
+    ("name" := Json.string)
+    ("email" := Json.string)
+
+userIdDecoder : Json.Decoder UserId
+userIdDecoder = Json.int
+
+getUserName : Users -> UserId -> Maybe String
+getUserName users userId =
+  Dict.get userId users
+    |> Maybe.map .name
diff --git a/src/client/Model/View/PaymentView.elm b/src/client/Model/View/PaymentView.elm
index bf5804f..93ab457 100644
--- a/src/client/Model/View/PaymentView.elm
+++ b/src/client/Model/View/PaymentView.elm
@@ -3,13 +3,15 @@ module Model.View.PaymentView
   , initPaymentView
   ) where
 
+import Model.User exposing (Users, UserId)
 import Model.Payment exposing (Payments)
 import Model.Payers exposing (Payers)
 import Model.View.Payment.Add exposing (..)
 import Model.View.Payment.Edition exposing (..)
 
 type alias PaymentView =
-  { userName : String
+  { users : Users
+  , me : UserId
   , add : AddPayment
   , payments : Payments
   , paymentsCount : Int
@@ -18,9 +20,10 @@ type alias PaymentView =
   , currentPage : Int
   }
 
-initPaymentView : String -> Payments -> Int -> Payers -> PaymentView
-initPaymentView userName payments paymentsCount payers =
-  { userName = userName
+initPaymentView : Users -> UserId -> Payments -> Int -> Payers -> PaymentView
+initPaymentView users me payments paymentsCount payers =
+  { users = users
+  , me = me
   , add = initAddPayment
   , payments = payments
   , paymentsCount = paymentsCount