81 lines
2.9 KiB
Haskell
81 lines
2.9 KiB
Haskell
{-|
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An 'Entry' represents a regular entry in the ledger file. It contains two
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or more 'RawTransaction's whose sum must be zero.
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-}
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module Ledger.Entry
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where
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import Ledger.Utils
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import Ledger.Types
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import Ledger.RawTransaction
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import Ledger.Amount
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instance Show Entry where show = showEntry
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instance Show ModifierEntry where
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show e = "= " ++ (valueexpr e) ++ "\n" ++ unlines (map show (m_transactions e))
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instance Show PeriodicEntry where
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show e = "~ " ++ (periodexpr e) ++ "\n" ++ unlines (map show (p_transactions e))
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{-|
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Show a ledger entry, formatted for the print command. ledger 2.x's
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standard format looks like this:
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@
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yyyy/mm/dd[ *][ CODE] description......... [ ; comment...............]
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account name 1..................... ...$amount1[ ; comment...............]
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account name 2..................... ..$-amount1[ ; comment...............]
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pcodewidth = no limit -- 10
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pdescwidth = no limit -- 20
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pacctwidth = 35 minimum, no maximum
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pamtwidth = 11
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pcommentwidth = no limit -- 22
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@
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-}
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showEntry :: Entry -> String
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showEntry e =
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unlines $ [precedingcomment ++ description] ++ (showtxns $ etransactions e) ++ [""]
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where
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precedingcomment = epreceding_comment_lines e
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description = concat [date, status, code, desc] -- , comment]
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date = showDate $ edate e
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status = if estatus e then " *" else ""
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code = if (length $ ecode e) > 0 then (printf " (%s)" $ ecode e) else ""
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desc = " " ++ edescription e
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comment = if (length $ ecomment e) > 0 then " ; "++(ecomment e) else ""
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showtxns (t1:t2:[]) = [showtxn t1, showtxnnoamt t2]
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showtxns ts = map showtxn ts
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showtxn t = showacct t ++ " " ++ (showamount $ tamount t) ++ (showcomment $ tcomment t)
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showtxnnoamt t = showacct t ++ " " ++ (showcomment $ tcomment t)
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showacct t = " " ++ (showaccountname $ taccount t)
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showamount = printf "%12s" . showMixedAmount
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showaccountname s = printf "%-34s" s
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showcomment s = if (length s) > 0 then " ; "++s else ""
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showDate = printf "%-10s"
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isEntryBalanced :: Entry -> Bool
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isEntryBalanced (Entry {etransactions=ts}) =
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isZeroMixedAmount $ sum $ map tamount $ filter isReal ts
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-- | Fill in a missing balance in this entry, if we have enough
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-- information to do that. Excluding virtual transactions, there should be
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-- at most one missing balance. Otherwise, raise an error.
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balanceEntry :: Entry -> Entry
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balanceEntry e@(Entry{etransactions=ts}) = e{etransactions=ts'}
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where
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(withamounts, missingamounts) = partition hasAmount $ filter isReal ts
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ts' = case (length missingamounts) of
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0 -> ts
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1 -> map balance ts
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otherwise -> error $ "could not balance this entry, too many missing amounts:\n" ++ show e
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otherstotal = sum $ map tamount withamounts
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balance t
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| isReal t && not (hasAmount t) = t{tamount = -otherstotal}
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| otherwise = t
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