65 lines
2.1 KiB
Haskell
65 lines
2.1 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 nullamt
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where
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ts = filter matchtxn $ ledgerTransactions l
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matchtxn Transaction{account=a} = matchLedgerPatterns False apats a
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apats = fst $ parseAccountDescriptionArgs args
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-- show transactions, one per line, keeping 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 isZeroAmount a then "" else this) ++ showtxns ts t bal'
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where
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this = if t `issame` tprev
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then showTransactionWithoutDescription t bal'
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else showTransactionWithDescription 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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showTransactionWithDescription :: Transaction -> Amount -> String
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showTransactionWithDescription t b =
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(showEntryDescription $ Entry (date t) False "" (description t) "" [] "")
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++ (showTransactionFormatted t)
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++ (showBalance b)
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showTransactionWithoutDescription :: Transaction -> Amount -> String
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showTransactionWithoutDescription t b =
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(replicate 32 ' ')
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++ (showTransactionFormatted t)
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++ (showBalance b)
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showTransactionFormatted :: Transaction -> String
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showTransactionFormatted (Transaction eno d desc a amt ttype) =
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showRawTransaction $ RawTransaction a amt "" ttype
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showBalance :: Amount -> String
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showBalance b = printf " %12s" (showAmountOrZero b)
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