95 lines
3.6 KiB
Haskell
95 lines
3.6 KiB
Haskell
{-|
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A 'Posting' represents a 'MixedAmount' being added to or subtracted from a
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single 'Account'. Each 'Transaction' contains two or more postings which
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should add up to 0. Postings also reference their parent transaction, so
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we can get a date or description for a posting (from the transaction).
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-}
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module Ledger.Posting
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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.Amount
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import Ledger.AccountName
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import Ledger.Dates (nulldate)
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instance Show Posting where show = showPosting
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nullposting = Posting False "" nullmixedamt "" RegularPosting Nothing
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showPosting :: Posting -> String
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showPosting (Posting{paccount=a,pamount=amt,pcomment=com,ptype=t}) =
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concatTopPadded [showaccountname a ++ " ", showamount amt, comment]
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where
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ledger3ishlayout = False
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acctnamewidth = if ledger3ishlayout then 25 else 22
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showaccountname = printf ("%-"++(show acctnamewidth)++"s") . bracket . elideAccountName width
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(bracket,width) = case t of
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BalancedVirtualPosting -> (\s -> "["++s++"]", acctnamewidth-2)
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VirtualPosting -> (\s -> "("++s++")", acctnamewidth-2)
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_ -> (id,acctnamewidth)
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showamount = padleft 12 . showMixedAmountOrZero
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comment = if null com then "" else " ; " ++ com
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-- XXX refactor
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showPostingForRegister (Posting{paccount=a,pamount=amt,ptype=t}) =
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concatTopPadded [showaccountname a ++ " ", showamount amt]
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where
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ledger3ishlayout = False
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acctnamewidth = if ledger3ishlayout then 25 else 22
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showaccountname = printf ("%-"++(show acctnamewidth)++"s") . bracket . elideAccountName width
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(bracket,width) = case t of
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BalancedVirtualPosting -> (\s -> "["++s++"]", acctnamewidth-2)
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VirtualPosting -> (\s -> "("++s++")", acctnamewidth-2)
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_ -> (id,acctnamewidth)
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showamount = padleft 12 . showMixedAmountOrZeroWithoutPrice
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isReal :: Posting -> Bool
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isReal p = ptype p == RegularPosting
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isVirtual :: Posting -> Bool
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isVirtual p = ptype p == VirtualPosting
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isBalancedVirtual :: Posting -> Bool
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isBalancedVirtual p = ptype p == BalancedVirtualPosting
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hasAmount :: Posting -> Bool
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hasAmount = (/= missingamt) . pamount
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postingTypeFromAccountName a
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| head a == '[' && last a == ']' = BalancedVirtualPosting
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| head a == '(' && last a == ')' = VirtualPosting
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| otherwise = RegularPosting
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accountNamesFromPostings :: [Posting] -> [AccountName]
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accountNamesFromPostings = nub . map paccount
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sumPostings :: [Posting] -> MixedAmount
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sumPostings = sum . map pamount
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postingDate :: Posting -> Day
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postingDate p = maybe nulldate tdate $ ptransaction p
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postingCleared :: Posting -> Bool
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postingCleared p = maybe False tstatus $ ptransaction p
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-- | Does this posting fall within the given date span ?
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isPostingInDateSpan :: DateSpan -> Posting -> Bool
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isPostingInDateSpan (DateSpan Nothing Nothing) _ = True
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isPostingInDateSpan (DateSpan Nothing (Just e)) p = postingDate p < e
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isPostingInDateSpan (DateSpan (Just b) Nothing) p = postingDate p >= b
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isPostingInDateSpan (DateSpan (Just b) (Just e)) p = d >= b && d < e where d = postingDate p
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isEmptyPosting :: Posting -> Bool
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isEmptyPosting = isZeroMixedAmount . pamount
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-- | Get the minimal date span which contains all the postings, or
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-- DateSpan Nothing Nothing if there are none.
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postingsDateSpan :: [Posting] -> DateSpan
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postingsDateSpan [] = DateSpan Nothing Nothing
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postingsDateSpan ps = DateSpan (Just $ postingDate $ head ps') (Just $ addDays 1 $ postingDate $ last ps')
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where ps' = sortBy (comparing postingDate) ps
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