101 lines
3.5 KiB
Haskell
101 lines
3.5 KiB
Haskell
{-|
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Utilities for doing I/O with ledger files.
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-}
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module Ledger.IO
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where
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import Control.Monad.Error
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import Ledger.Ledger (cacheLedger)
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import Ledger.Parse (parseLedger)
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import Ledger.RawLedger (canonicaliseAmounts,filterRawLedger,rawLedgerSelectingDate)
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import Ledger.Types (FilterSpec(..),WhichDate(..),DateSpan(..),RawLedger(..),Ledger(..))
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import Ledger.Utils (getCurrentLocalTime)
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import System.Directory (getHomeDirectory)
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import System.Environment (getEnv)
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import System.IO
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import System.FilePath ((</>))
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ledgerenvvar = "LEDGER"
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timelogenvvar = "TIMELOG"
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ledgerdefaultfilename = ".ledger"
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timelogdefaultfilename = ".timelog"
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nullfilterspec = FilterSpec {
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datespan=DateSpan Nothing Nothing
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,cleared=Nothing
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,real=False
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,costbasis=False
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,acctpats=[]
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,descpats=[]
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,whichdate=ActualDate
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}
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-- | Get the user's default ledger file path.
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myLedgerPath :: IO String
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myLedgerPath =
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getEnv ledgerenvvar `catch`
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(\_ -> do
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home <- getHomeDirectory
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return $ home </> ledgerdefaultfilename)
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-- | Get the user's default timelog file path.
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myTimelogPath :: IO String
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myTimelogPath =
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getEnv timelogenvvar `catch`
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(\_ -> do
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home <- getHomeDirectory
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return $ home </> timelogdefaultfilename)
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-- | Read the user's default ledger file, or give an error.
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myLedger :: IO Ledger
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myLedger = myLedgerPath >>= readLedger
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-- | Read the user's default timelog file, or give an error.
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myTimelog :: IO Ledger
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myTimelog = myTimelogPath >>= readLedger
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-- | Read a ledger from this file, with no filtering, or give an error.
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readLedger :: FilePath -> IO Ledger
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readLedger = readLedgerWithFilterSpec nullfilterspec
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-- | Read a ledger from this file, filtering according to the filter spec.,
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-- | or give an error.
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readLedgerWithFilterSpec :: FilterSpec -> FilePath -> IO Ledger
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readLedgerWithFilterSpec fspec f = do
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s <- readFile f
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rl <- rawLedgerFromString s
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return $ filterAndCacheLedger fspec s rl
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-- | Read a RawLedger from the given string, using the current time as
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-- reference time, or give a parse error.
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rawLedgerFromString :: String -> IO RawLedger
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rawLedgerFromString s = do
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t <- getCurrentLocalTime
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liftM (either error id) $ runErrorT $ parseLedger t "(string)" s
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-- | Convert a RawLedger to a canonicalised, cached and filtered Ledger.
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filterAndCacheLedger :: FilterSpec -> String -> RawLedger -> Ledger
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filterAndCacheLedger (FilterSpec{datespan=datespan,cleared=cleared,real=real,
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costbasis=costbasis,acctpats=acctpats,
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descpats=descpats,whichdate=whichdate})
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rawtext
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rl =
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(cacheLedger acctpats
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$ filterRawLedger datespan descpats cleared real
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$ rawLedgerSelectingDate whichdate
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$ canonicaliseAmounts costbasis rl
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){rawledgertext=rawtext}
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-- -- | Expand ~ in a file path (does not handle ~name).
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-- tildeExpand :: FilePath -> IO FilePath
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-- tildeExpand ('~':[]) = getHomeDirectory
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-- tildeExpand ('~':'/':xs) = getHomeDirectory >>= return . (++ ('/':xs))
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-- --handle ~name, requires -fvia-C or ghc 6.8:
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-- --import System.Posix.User
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-- -- tildeExpand ('~':xs) = do let (user, path) = span (/= '/') xs
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-- -- pw <- getUserEntryForName user
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-- -- return (homeDirectory pw ++ path)
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-- tildeExpand xs = return xs
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