lib/Hcompta/Model/Date.hs

   1 {-# LANGUAGE DeriveDataTypeable #-}
   2 module Hcompta.Model.Date where
   3
   4 import Data.Data
   5 import qualified Data.Time.Calendar    as Time (Day)
   6 import qualified Data.Time.Clock       as Time (UTCTime)
   7 import qualified Data.Time.Format      as Time ()
   8 import qualified Data.Time.Clock.POSIX as Time (posixSecondsToUTCTime)
   9 import Data.Typeable ()
  10
  11 -- * The 'Date' type
  12
  13 type Date
  14  = Time.UTCTime
  15
  16 null :: Date
  17 null = Time.posixSecondsToUTCTime 0
  18
  19 data Interval
  20  =   Interval_None
  21  |   Interval_Days Int
  22  |   Interval_Weeks Int
  23  |   Interval_Months Int
  24  |   Interval_Quarters Int
  25  |   Interval_Years Int
  26  |   Interval_DayOfMonth Int
  27  |   Interval_DayOfWeek Int
  28  -- Interval_WeekOfYear Int
  29  -- Interval_MonthOfYear Int
  30  -- Interval_QuarterOfYear Int
  31  deriving (Data, Eq, Ord, Read, Show, Typeable)
  32
  33 type Smart
  34  = (String, String, String)
  35
  36 data Span
  37  =   Span (Maybe Time.Day) (Maybe Time.Day)
  38  deriving (Data, Eq, Ord, Read, Show, Typeable)
  39
  40 data Which
  41  =   Which_Primary
  42  |   Which_Secondary
  43  deriving (Eq, Read, Show)
  44
  45 type Year
  46  = Integer