54 lines
1.9 KiB
Haskell
54 lines
1.9 KiB
Haskell
{-|
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A ledger-compatible @register@ command.
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-}
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module RegisterCommand
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where
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import Ledger
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import Options
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-- | Print a register report.
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register :: [Opt] -> [String] -> Ledger -> IO ()
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register opts args l = putStr $ showRegisterReport opts args l
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{- |
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Generate the register report. Each ledger entry is displayed as two or
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more lines like this:
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@
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date (10) description (20) account (22) amount (11) balance (12)
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DDDDDDDDDD dddddddddddddddddddd aaaaaaaaaaaaaaaaaaaaaa AAAAAAAAAAA AAAAAAAAAAAA
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aaaaaaaaaaaaaaaaaaaaaa AAAAAAAAAAA AAAAAAAAAAAA
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... ... ...
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@
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-}
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showRegisterReport :: [Opt] -> [String] -> Ledger -> String
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showRegisterReport opts args l = showtxns ts nulltxn nullmixedamt
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where
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ts = filter matchtxn $ ledgerTransactions l
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matchtxn Transaction{account=a} = matchpats apats a
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apats = fst $ parseAccountDescriptionArgs args
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-- show transactions, one per line, with a running balance
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showtxns [] _ _ = ""
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showtxns (t@Transaction{amount=a}:ts) tprev bal =
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(if isZeroMixedAmount a then "" else this) ++ showtxns ts t bal'
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where
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this = showtxn (t `issame` tprev) t bal'
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issame t1 t2 = entryno t1 == entryno t2
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bal' = bal + amount t
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-- show one transaction line, with or without the entry details
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showtxn :: Bool -> Transaction -> MixedAmount -> String
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showtxn omitdesc t b = entrydesc ++ txn ++ bal ++ "\n"
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where
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entrydesc = if omitdesc then replicate 32 ' ' else printf "%s %s " date desc
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date = show $ da
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desc = printf "%-20s" $ elideRight 20 de :: String
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txn = showRawTransaction $ RawTransaction a amt "" tt
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bal = printf " %12s" (showMixedAmountOrZero b)
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Transaction{date=da,description=de,account=a,amount=amt,ttype=tt} = t
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