{-# LANGUAGE OverloadedStrings #-} {-# LANGUAGE RecordWildCards #-} {-# LANGUAGE ViewPatterns #-} {-# LANGUAGE CPP #-} {-| This module provides helpers for applying 'TransactionModifier's (eg generating automated postings) and generating 'PeriodicTransaction's. -} module Hledger.Data.AutoTransaction ( -- * Transaction modifiers transactionModifierToFunction -- * Periodic transactions , runPeriodicTransaction , checkPeriodicTransactionStartDate -- -- * Accessors, seemingly unused -- , tmParseQuery -- , jdatespan -- , periodTransactionInterval ) where import Data.Maybe #if !(MIN_VERSION_base(4,11,0)) import Data.Monoid ((<>)) #endif import Data.Time.Calendar import qualified Data.Text as T import Hledger.Data.Types import Hledger.Data.Dates import Hledger.Data.Amount import Hledger.Data.Posting (post) import Hledger.Data.Transaction import Hledger.Utils.UTF8IOCompat (error') import Hledger.Query -- import Hledger.Utils.Debug -- $setup -- >>> :set -XOverloadedStrings -- >>> import Hledger.Data.Posting -- >>> import Hledger.Data.Journal -- | Converts a 'TransactionModifier' and a 'Query' to a -- 'Transaction'-transforming function. The query allows injection of -- additional restrictions on which postings to modify. -- The transformer function will not call 'txnTieKnot', you will -- probably want to call that after using it. -- -- >>> transactionModifierToFunction Any (TransactionModifier "" ["pong" `post` usd 2]) nulltransaction{tpostings=["ping" `post` usd 1]} -- 0000/01/01 -- ping $1.00 -- pong $2.00 -- -- -- >>> transactionModifierToFunction Any (TransactionModifier "miss" ["pong" `post` usd 2]) nulltransaction{tpostings=["ping" `post` usd 1]} -- 0000/01/01 -- ping $1.00 -- -- -- >>> transactionModifierToFunction None (TransactionModifier "" ["pong" `post` usd 2]) nulltransaction{tpostings=["ping" `post` usd 1]} -- 0000/01/01 -- ping $1.00 -- -- -- >>> transactionModifierToFunction Any (TransactionModifier "ping" ["pong" `post` amount{amultiplier=True, aquantity=3}]) nulltransaction{tpostings=["ping" `post` usd 2]} -- 0000/01/01 -- ping $2.00 -- pong $6.00 -- -- transactionModifierToFunction :: Query -> TransactionModifier -> (Transaction -> Transaction) transactionModifierToFunction q mt = \t@(tpostings -> ps) -> t { tpostings = generatePostings ps } -- TODO add modifier txn comment/tags ? where q' = simplifyQuery $ And [q, tmParseQuery mt (error' "a transaction modifier's query cannot depend on current date")] mods = map tmPostingToFunction $ tmpostings mt generatePostings ps = [p' | p <- ps , p' <- if q' `matchesPosting` p then p:[ m p | m <- mods] else [p]] -- | Parse the 'Query' from a 'TransactionModifier's 'tmquerytxt', -- and return it as a function requiring the current date. -- -- >>> mtvaluequery (TransactionModifier "" []) undefined -- Any -- >>> mtvaluequery (TransactionModifier "ping" []) undefined -- Acct "ping" -- >>> mtvaluequery (TransactionModifier "date:2016" []) undefined -- Date (DateSpan 2016) -- >>> mtvaluequery (TransactionModifier "date:today" []) (read "2017-01-01") -- Date (DateSpan 2017/01/01) tmParseQuery :: TransactionModifier -> (Day -> Query) tmParseQuery mt = fst . flip parseQuery (tmquerytxt mt) ---- | 'DateSpan' of all dates mentioned in 'Journal' ---- ---- >>> jdatespan nulljournal ---- DateSpan - ---- >>> jdatespan nulljournal{jtxns=[nulltransaction{tdate=read "2016-01-01"}] } ---- DateSpan 2016/01/01 ---- >>> jdatespan nulljournal{jtxns=[nulltransaction{tdate=read "2016-01-01", tpostings=[nullposting{pdate=Just $ read "2016-02-01"}]}] } ---- DateSpan 2016/01/01-2016/02/01 --jdatespan :: Journal -> DateSpan --jdatespan j -- | null dates = nulldatespan -- | otherwise = DateSpan (Just $ minimum dates) (Just $ 1 `addDays` maximum dates) -- where -- dates = concatMap tdates $ jtxns j ---- | 'DateSpan' of all dates mentioned in 'Transaction' ---- ---- >>> tdates nulltransaction ---- [0000-01-01] --tdates :: Transaction -> [Day] --tdates t = tdate t : concatMap pdates (tpostings t) ++ maybeToList (tdate2 t) where -- pdates p = catMaybes [pdate p, pdate2 p] postingScale :: Posting -> Maybe Quantity postingScale p = case amounts $ pamount p of [a] | amultiplier a -> Just $ aquantity a _ -> Nothing -- | Converts a 'TransactionModifier''s posting to a 'Posting'-generating function, -- which will be used to make a new posting based on the old one (an "automated posting"). tmPostingToFunction :: Posting -> (Posting -> Posting) tmPostingToFunction p' = \p -> renderPostingCommentDates $ p' { pdate = pdate p , pdate2 = pdate2 p , pamount = amount' p } where amount' = case postingScale p' of Nothing -> const $ pamount p' Just n -> \p -> withAmountType (head $ amounts $ pamount p') $ pamount p `divideMixedAmount` (1/n) withAmountType amount (Mixed as) = case acommodity amount of "" -> Mixed as c -> Mixed [a{acommodity = c, astyle = astyle amount, aprice = aprice amount} | a <- as] renderPostingCommentDates :: Posting -> Posting renderPostingCommentDates p = p { pcomment = comment' } where datesComment = T.concat $ catMaybes [T.pack . showDate <$> pdate p, ("=" <>) . T.pack . showDate <$> pdate2 p] comment' | T.null datesComment = pcomment p | otherwise = T.intercalate "\n" $ filter (not . T.null) [T.strip $ pcomment p, "[" <> datesComment <> "]"] -- doctest helper, too much hassle to define in the comment -- XXX duplicates some logic in periodictransactionp _ptgen str = do let t = T.pack str (i,s) = parsePeriodExpr' nulldate t case checkPeriodicTransactionStartDate i s t of Just e -> error' e Nothing -> mapM_ (putStr . show) $ runPeriodicTransaction nullperiodictransaction{ ptperiodexpr=t , ptspan=s, ptinterval=i, ptpostings=["a" `post` usd 1] } nulldatespan -- | Generate transactions from 'PeriodicTransaction' within a 'DateSpan' -- -- Note that new transactions require 'txnTieKnot' post-processing. -- -- >>> _ptgen "monthly from 2017/1 to 2017/4" -- 2017/01/01 -- ; recur: monthly from 2017/1 to 2017/4 -- a $1.00 -- -- 2017/02/01 -- ; recur: monthly from 2017/1 to 2017/4 -- a $1.00 -- -- 2017/03/01 -- ; recur: monthly from 2017/1 to 2017/4 -- a $1.00 -- -- -- >>> _ptgen "monthly from 2017/1 to 2017/5" -- 2017/01/01 -- ; recur: monthly from 2017/1 to 2017/5 -- a $1.00 -- -- 2017/02/01 -- ; recur: monthly from 2017/1 to 2017/5 -- a $1.00 -- -- 2017/03/01 -- ; recur: monthly from 2017/1 to 2017/5 -- a $1.00 -- -- 2017/04/01 -- ; recur: monthly from 2017/1 to 2017/5 -- a $1.00 -- -- -- >>> _ptgen "every 2nd day of month from 2017/02 to 2017/04" -- 2017/01/02 -- ; recur: every 2nd day of month from 2017/02 to 2017/04 -- a $1.00 -- -- 2017/02/02 -- ; recur: every 2nd day of month from 2017/02 to 2017/04 -- a $1.00 -- -- 2017/03/02 -- ; recur: every 2nd day of month from 2017/02 to 2017/04 -- a $1.00 -- -- -- >>> _ptgen "every 30th day of month from 2017/1 to 2017/5" -- 2016/12/30 -- ; recur: every 30th day of month from 2017/1 to 2017/5 -- a $1.00 -- -- 2017/01/30 -- ; recur: every 30th day of month from 2017/1 to 2017/5 -- a $1.00 -- -- 2017/02/28 -- ; recur: every 30th day of month from 2017/1 to 2017/5 -- a $1.00 -- -- 2017/03/30 -- ; recur: every 30th day of month from 2017/1 to 2017/5 -- a $1.00 -- -- 2017/04/30 -- ; recur: every 30th day of month from 2017/1 to 2017/5 -- a $1.00 -- -- -- >>> _ptgen "every 2nd Thursday of month from 2017/1 to 2017/4" -- 2016/12/08 -- ; recur: every 2nd Thursday of month from 2017/1 to 2017/4 -- a $1.00 -- -- 2017/01/12 -- ; recur: every 2nd Thursday of month from 2017/1 to 2017/4 -- a $1.00 -- -- 2017/02/09 -- ; recur: every 2nd Thursday of month from 2017/1 to 2017/4 -- a $1.00 -- -- 2017/03/09 -- ; recur: every 2nd Thursday of month from 2017/1 to 2017/4 -- a $1.00 -- -- -- >>> _ptgen "every nov 29th from 2017 to 2019" -- 2016/11/29 -- ; recur: every nov 29th from 2017 to 2019 -- a $1.00 -- -- 2017/11/29 -- ; recur: every nov 29th from 2017 to 2019 -- a $1.00 -- -- 2018/11/29 -- ; recur: every nov 29th from 2017 to 2019 -- a $1.00 -- -- -- >>> _ptgen "2017/1" -- 2017/01/01 -- ; recur: 2017/1 -- a $1.00 -- -- -- >>> _ptgen "" -- *** Exception: failed to parse... -- ... -- -- >>> _ptgen "weekly from 2017" -- *** Exception: Unable to generate transactions according to "weekly from 2017" because 2017-01-01 is not a first day of the week -- -- >>> _ptgen "monthly from 2017/5/4" -- *** Exception: Unable to generate transactions according to "monthly from 2017/5/4" because 2017-05-04 is not a first day of the month -- -- >>> _ptgen "every quarter from 2017/1/2" -- *** Exception: Unable to generate transactions according to "every quarter from 2017/1/2" because 2017-01-02 is not a first day of the quarter -- -- >>> _ptgen "yearly from 2017/1/14" -- *** Exception: Unable to generate transactions according to "yearly from 2017/1/14" because 2017-01-14 is not a first day of the year -- -- >>> let reportperiod="daily from 2018/01/03" in let (i,s) = parsePeriodExpr' nulldate reportperiod in runPeriodicTransaction (nullperiodictransaction{ptperiodexpr=reportperiod, ptspan=s, ptinterval=i, ptpostings=["a" `post` usd 1]}) (DateSpan (Just $ parsedate "2018-01-01") (Just $ parsedate "2018-01-03")) -- [] -- runPeriodicTransaction :: PeriodicTransaction -> DateSpan -> [Transaction] runPeriodicTransaction PeriodicTransaction{..} requestedspan = [ t{tdate=d} | (DateSpan (Just d) _) <- ptinterval `splitSpan` spantofill ] where spantofill = spanIntervalIntersect ptinterval ptspan requestedspan t = nulltransaction{ tstatus = ptstatus ,tcode = ptcode ,tdescription = ptdescription ,tcomment = (if T.null ptcomment then "\n" else ptcomment) <> "recur: " <> ptperiodexpr ,ttags = ("recur", ptperiodexpr) : pttags ,tpostings = ptpostings } -- | Check that this date span begins at a boundary of this interval, -- or return an explanatory error message including the provided period expression -- (from which the span and interval are derived). checkPeriodicTransactionStartDate :: Interval -> DateSpan -> T.Text -> Maybe String checkPeriodicTransactionStartDate i s periodexpr = case (i, spanStart s) of (Weeks _, Just d) -> checkStart d "week" (Months _, Just d) -> checkStart d "month" (Quarters _, Just d) -> checkStart d "quarter" (Years _, Just d) -> checkStart d "year" _ -> Nothing where checkStart d x = let firstDate = fixSmartDate d ("","this",x) in if d == firstDate then Nothing else Just $ "Unable to generate transactions according to "++show (T.unpack periodexpr) ++" because "++show d++" is not a first day of the "++x ---- | What is the interval of this 'PeriodicTransaction's period expression, if it can be parsed ? --periodTransactionInterval :: PeriodicTransaction -> Maybe Interval --periodTransactionInterval pt = -- let -- expr = ptperiodexpr pt -- err = error' $ "Current date cannot be referenced in " ++ show (T.unpack expr) -- in -- case parsePeriodExpr err expr of -- Left _ -> Nothing -- Right (i,_) -> Just i