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+{-
+This modules describes output data for the command line utlity.
+-}
+{-# LANGUAGE DeriveAnyClass #-}
+{-# LANGUAGE DeriveGeneric #-}
+
+module Main.Output
+  ( BillBudget(..)
+  , zipBills
+  ) where
+
+import GHC.Generics (Generic)
+
+import Data.Aeson (ToJSON)
+
+import Malodivo.Budget (DistrictFunds)
+import Malodivo.Types.Bill (Bill)
+
+import Main.DistrictInfo (DistrictInfo, df2di)
+
+-- | This is output type. It describes contribution of each district into a bill.
+data BillBudget = BillBudget
+  { bill :: Bill
+  , districts :: [DistrictInfo]
+  } deriving (Generic, ToJSON)
+
+zipBills :: [Bill] -> [DistrictFunds] -> [BillBudget]
+zipBills = zipWith zipper
+  where
+    zipper b df = BillBudget {bill = b, districts = df2di df}