413 lines
15 KiB
Haskell
413 lines
15 KiB
Haskell
{-|
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A 'Posting' represents a change (by some 'MixedAmount') of the balance in
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some 'Account'. Each 'Transaction' contains two or more postings which
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should add up to 0. Postings reference their parent transaction, so we can
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look up the date or description there.
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-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE CPP #-}
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module Hledger.Data.Posting (
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-- * Posting
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nullposting,
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posting,
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post,
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vpost,
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post',
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vpost',
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nullsourcepos,
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nullassertion,
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assertion,
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balassert,
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balassertTot,
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balassertParInc,
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balassertTotInc,
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-- * operations
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originalPosting,
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postingStatus,
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isReal,
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isVirtual,
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isBalancedVirtual,
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isEmptyPosting,
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hasBalanceAssignment,
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hasAmount,
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postingAllTags,
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transactionAllTags,
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relatedPostings,
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removePrices,
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-- * date operations
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postingDate,
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postingDate2,
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isPostingInDateSpan,
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isPostingInDateSpan',
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postingsDateSpan,
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postingsDateSpan',
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-- * account name operations
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accountNamesFromPostings,
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accountNamePostingType,
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accountNameWithoutPostingType,
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accountNameWithPostingType,
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joinAccountNames,
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concatAccountNames,
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accountNameApplyAliases,
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accountNameApplyAliasesMemo,
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-- * transaction description operations
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transactionPayee,
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transactionNote,
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payeeAndNoteFromDescription,
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-- * arithmetic
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sumPostings,
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-- * rendering
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showPosting,
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-- * misc.
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showComment,
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postingTransformAmount,
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postingApplyValuation,
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postingToCost,
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tests_Posting
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)
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where
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import Data.List
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import qualified Data.Map as M
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import Data.Maybe
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import Data.MemoUgly (memo)
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#if !(MIN_VERSION_base(4,11,0))
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import Data.Monoid
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#endif
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import Data.Text (Text)
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import qualified Data.Text as T
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import Data.Time.Calendar
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import Safe
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import Hledger.Utils
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import Hledger.Data.Types
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import Hledger.Data.Amount
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import Hledger.Data.AccountName
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import Hledger.Data.Dates (nulldate, spanContainsDate)
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import Hledger.Data.Prices
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nullposting, posting :: Posting
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nullposting = Posting
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{pdate=Nothing
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,pdate2=Nothing
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,pstatus=Unmarked
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,paccount=""
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,pamount=nullmixedamt
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,pcomment=""
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,ptype=RegularPosting
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,ptags=[]
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,pbalanceassertion=Nothing
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,ptransaction=Nothing
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,poriginal=Nothing
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}
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posting = nullposting
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-- constructors
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-- | Make a posting to an account.
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post :: AccountName -> Amount -> Posting
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post acc amt = posting {paccount=acc, pamount=Mixed [amt]}
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-- | Make a virtual (unbalanced) posting to an account.
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vpost :: AccountName -> Amount -> Posting
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vpost acc amt = (post acc amt){ptype=VirtualPosting}
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-- | Make a posting to an account, maybe with a balance assertion.
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post' :: AccountName -> Amount -> Maybe BalanceAssertion -> Posting
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post' acc amt ass = posting {paccount=acc, pamount=Mixed [amt], pbalanceassertion=ass}
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-- | Make a virtual (unbalanced) posting to an account, maybe with a balance assertion.
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vpost' :: AccountName -> Amount -> Maybe BalanceAssertion -> Posting
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vpost' acc amt ass = (post' acc amt ass){ptype=VirtualPosting, pbalanceassertion=ass}
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nullsourcepos :: GenericSourcePos
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nullsourcepos = JournalSourcePos "" (1,1)
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nullassertion, assertion :: BalanceAssertion
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nullassertion = BalanceAssertion
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{baamount=nullamt
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,batotal=False
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,bainclusive=False
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,baposition=nullsourcepos
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}
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assertion = nullassertion
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-- | Make a partial, exclusive balance assertion.
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balassert :: Amount -> Maybe BalanceAssertion
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balassert amt = Just $ nullassertion{baamount=amt}
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-- | Make a total, exclusive balance assertion.
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balassertTot :: Amount -> Maybe BalanceAssertion
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balassertTot amt = Just $ nullassertion{baamount=amt, batotal=True}
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-- | Make a partial, inclusive balance assertion.
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balassertParInc :: Amount -> Maybe BalanceAssertion
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balassertParInc amt = Just $ nullassertion{baamount=amt, bainclusive=True}
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-- | Make a total, inclusive balance assertion.
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balassertTotInc :: Amount -> Maybe BalanceAssertion
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balassertTotInc amt = Just $ nullassertion{baamount=amt, batotal=True, bainclusive=True}
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-- Get the original posting, if any.
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originalPosting :: Posting -> Posting
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originalPosting p = fromMaybe p $ poriginal p
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-- XXX once rendered user output, but just for debugging now; clean up
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showPosting :: Posting -> String
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showPosting p@Posting{paccount=a,pamount=amt,ptype=t} =
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unlines $ [concatTopPadded [show (postingDate p) ++ " ", showaccountname a ++ " ", showamount amt, showComment (pcomment p)]]
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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 = fitString (Just acctnamewidth) Nothing False False . bracket . T.unpack . 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 = padLeftWide 12 . showMixedAmount
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showComment :: Text -> String
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showComment t = if T.null t then "" else " ;" ++ T.unpack t
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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 = (/= missingmixedamt) . pamount
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hasBalanceAssignment :: Posting -> Bool
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hasBalanceAssignment p = not (hasAmount p) && isJust (pbalanceassertion p)
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-- | Sorted unique account names referenced by these postings.
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accountNamesFromPostings :: [Posting] -> [AccountName]
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accountNamesFromPostings = nub . sort . map paccount
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sumPostings :: [Posting] -> MixedAmount
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sumPostings = sumStrict . map pamount
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-- | Remove all prices of a posting
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removePrices :: Posting -> Posting
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removePrices p = p{ pamount = Mixed $ remove <$> amounts (pamount p) }
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where remove a = a { aprice = Nothing }
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-- | Get a posting's (primary) date - it's own primary date if specified,
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-- otherwise the parent transaction's primary date, or the null date if
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-- there is no parent transaction.
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postingDate :: Posting -> Day
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postingDate p = fromMaybe txndate $ pdate p
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where
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txndate = maybe nulldate tdate $ ptransaction p
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-- | Get a posting's secondary (secondary) date, which is the first of:
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-- posting's secondary date, transaction's secondary date, posting's
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-- primary date, transaction's primary date, or the null date if there is
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-- no parent transaction.
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postingDate2 :: Posting -> Day
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postingDate2 p = headDef nulldate $ catMaybes dates
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where dates = [pdate2 p
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,maybe Nothing tdate2 $ ptransaction p
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,pdate p
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,fmap tdate (ptransaction p)
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]
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-- | Get a posting's status. This is cleared or pending if those are
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-- explicitly set on the posting, otherwise the status of its parent
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-- transaction, or unmarked if there is no parent transaction. (Note
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-- the ambiguity, unmarked can mean "posting and transaction are both
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-- unmarked" or "posting is unmarked and don't know about the transaction".
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postingStatus :: Posting -> Status
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postingStatus Posting{pstatus=s, ptransaction=mt}
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| s == Unmarked = case mt of Just t -> tstatus t
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Nothing -> Unmarked
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| otherwise = s
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transactionPayee :: Transaction -> Text
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transactionPayee = fst . payeeAndNoteFromDescription . tdescription
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transactionNote :: Transaction -> Text
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transactionNote = snd . payeeAndNoteFromDescription . tdescription
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-- | Parse a transaction's description into payee and note (aka narration) fields,
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-- assuming a convention of separating these with | (like Beancount).
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-- Ie, everything up to the first | is the payee, everything after it is the note.
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-- When there's no |, payee == note == description.
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payeeAndNoteFromDescription :: Text -> (Text,Text)
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payeeAndNoteFromDescription t
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| T.null n = (t, t)
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| otherwise = (textstrip p, textstrip $ T.drop 1 n)
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where
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(p, n) = T.span (/= '|') t
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-- | Tags for this posting including any inherited from its parent transaction.
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postingAllTags :: Posting -> [Tag]
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postingAllTags p = ptags p ++ maybe [] ttags (ptransaction p)
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-- | Tags for this transaction including any from its postings.
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transactionAllTags :: Transaction -> [Tag]
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transactionAllTags t = ttags t ++ concatMap ptags (tpostings t)
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-- Get the other postings from this posting's transaction.
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relatedPostings :: Posting -> [Posting]
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relatedPostings p@Posting{ptransaction=Just t} = filter (/= p) $ tpostings t
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relatedPostings _ = []
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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 s = spanContainsDate s . postingDate
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-- --date2-sensitive version, separate for now to avoid disturbing multiBalanceReport.
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isPostingInDateSpan' :: WhichDate -> DateSpan -> Posting -> Bool
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isPostingInDateSpan' PrimaryDate s = spanContainsDate s . postingDate
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isPostingInDateSpan' SecondaryDate s = spanContainsDate s . postingDate2
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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 the
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-- null date span 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' = sortOn postingDate ps
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-- --date2-sensitive version, as above.
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postingsDateSpan' :: WhichDate -> [Posting] -> DateSpan
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postingsDateSpan' _ [] = DateSpan Nothing Nothing
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postingsDateSpan' wd ps = DateSpan (Just $ postingdate $ head ps') (Just $ addDays 1 $ postingdate $ last ps')
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where
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ps' = sortOn postingdate ps
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postingdate = if wd == PrimaryDate then postingDate else postingDate2
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-- AccountName stuff that depends on PostingType
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accountNamePostingType :: AccountName -> PostingType
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accountNamePostingType a
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| T.null a = RegularPosting
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| T.head a == '[' && T.last a == ']' = BalancedVirtualPosting
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| T.head a == '(' && T.last a == ')' = VirtualPosting
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| otherwise = RegularPosting
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accountNameWithoutPostingType :: AccountName -> AccountName
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accountNameWithoutPostingType a = case accountNamePostingType a of
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BalancedVirtualPosting -> T.init $ T.tail a
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VirtualPosting -> T.init $ T.tail a
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RegularPosting -> a
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accountNameWithPostingType :: PostingType -> AccountName -> AccountName
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accountNameWithPostingType BalancedVirtualPosting a = "["<>accountNameWithoutPostingType a<>"]"
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accountNameWithPostingType VirtualPosting a = "("<>accountNameWithoutPostingType a<>")"
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accountNameWithPostingType RegularPosting a = accountNameWithoutPostingType a
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-- | Prefix one account name to another, preserving posting type
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-- indicators like concatAccountNames.
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joinAccountNames :: AccountName -> AccountName -> AccountName
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joinAccountNames a b = concatAccountNames $ filter (not . T.null) [a,b]
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-- | Join account names into one. If any of them has () or [] posting type
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-- indicators, these (the first type encountered) will also be applied to
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-- the resulting account name.
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concatAccountNames :: [AccountName] -> AccountName
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concatAccountNames as = accountNameWithPostingType t $ T.intercalate ":" $ map accountNameWithoutPostingType as
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where t = headDef RegularPosting $ filter (/= RegularPosting) $ map accountNamePostingType as
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-- | Rewrite an account name using all matching aliases from the given list, in sequence.
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-- Each alias sees the result of applying the previous aliases.
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accountNameApplyAliases :: [AccountAlias] -> AccountName -> AccountName
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accountNameApplyAliases aliases a = accountNameWithPostingType atype aname'
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where
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(aname,atype) = (accountNameWithoutPostingType a, accountNamePostingType a)
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aname' = foldl
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(\acct alias -> dbg6 "result" $ aliasReplace (dbg6 "alias" alias) (dbg6 "account" acct))
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aname
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aliases
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-- | Memoising version of accountNameApplyAliases, maybe overkill.
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accountNameApplyAliasesMemo :: [AccountAlias] -> AccountName -> AccountName
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accountNameApplyAliasesMemo aliases = memo (accountNameApplyAliases aliases)
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-- aliasMatches :: AccountAlias -> AccountName -> Bool
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-- aliasMatches (BasicAlias old _) a = old `isAccountNamePrefixOf` a
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-- aliasMatches (RegexAlias re _) a = regexMatchesCI re a
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aliasReplace :: AccountAlias -> AccountName -> AccountName
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aliasReplace (BasicAlias old new) a
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| old `isAccountNamePrefixOf` a || old == a = new <> T.drop (T.length old) a
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| otherwise = a
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aliasReplace (RegexAlias re repl) a = T.pack $ regexReplaceCIMemo re repl $ T.unpack a -- XXX
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-- Apply a specified valuation to this posting's amount, using the provided
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-- prices db, commodity styles, period-end/current dates, and whether
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-- this is for a multiperiod report or not.
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postingApplyValuation :: [PriceDirective] -> M.Map CommoditySymbol AmountStyle -> Day -> Day -> Bool -> Posting -> ValuationType -> Posting
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postingApplyValuation prices styles periodend today ismultiperiod p v =
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case v of
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AtCost Nothing -> postingToCost styles p
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AtCost mc -> postingValueAtDate prices mc periodend $ postingToCost styles p
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AtEnd mc -> postingValueAtDate prices mc periodend p
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AtNow mc -> postingValueAtDate prices mc today p
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AtDefault mc | ismultiperiod -> postingValueAtDate prices mc periodend p
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AtDefault mc -> postingValueAtDate prices mc today p
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AtDate d mc -> postingValueAtDate prices mc d p
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-- | Convert this posting's amount to cost, and apply the appropriate amount styles.
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postingToCost :: M.Map CommoditySymbol AmountStyle -> Posting -> Posting
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postingToCost styles p@Posting{pamount=a} = p{pamount=mixedAmountToCost styles a}
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-- | Convert this posting's amount to market value in the given commodity,
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-- or the default valuation commodity, at the given valuation date,
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-- using the given market prices.
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-- When market prices available on that date are not sufficient to
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-- calculate the value, amounts are left unchanged.
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postingValueAtDate :: [PriceDirective] -> Maybe CommoditySymbol -> Day -> Posting -> Posting
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postingValueAtDate prices mc d p = postingTransformAmount (mixedAmountValueAtDate prices mc d) p
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-- | Apply a transform function to this posting's amount.
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postingTransformAmount :: (MixedAmount -> MixedAmount) -> Posting -> Posting
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postingTransformAmount f p@Posting{pamount=a} = p{pamount=f a}
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-- tests
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tests_Posting = tests "Posting" [
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tests "accountNamePostingType" [
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accountNamePostingType "a" `is` RegularPosting
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,accountNamePostingType "(a)" `is` VirtualPosting
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,accountNamePostingType "[a]" `is` BalancedVirtualPosting
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]
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,tests "accountNameWithoutPostingType" [
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accountNameWithoutPostingType "(a)" `is` "a"
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]
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,tests "accountNameWithPostingType" [
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accountNameWithPostingType VirtualPosting "[a]" `is` "(a)"
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]
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,tests "joinAccountNames" [
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"a" `joinAccountNames` "b:c" `is` "a:b:c"
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,"a" `joinAccountNames` "(b:c)" `is` "(a:b:c)"
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,"[a]" `joinAccountNames` "(b:c)" `is` "[a:b:c]"
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,"" `joinAccountNames` "a" `is` "a"
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]
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,tests "concatAccountNames" [
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concatAccountNames [] `is` ""
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,concatAccountNames ["a","(b)","[c:d]"] `is` "(a:b:c:d)"
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]
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]
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