pwncash/lib/Internal/History.hs

365 lines
11 KiB
Haskell

module Internal.History
( splitHistory
, readHistTransfer
, readHistStmt
, insertHistory
)
where
import Control.Monad.Except
import Data.Csv
import Database.Persist.Monad
import Internal.Database
import Internal.Types.Main
import Internal.Utils
import RIO hiding (to)
import qualified RIO.ByteString.Lazy as BL
import RIO.FilePath
import qualified RIO.List as L
import qualified RIO.Map as M
import qualified RIO.NonEmpty as NE
import qualified RIO.Text as T
import RIO.Time
import qualified RIO.Vector as V
splitHistory :: [History] -> ([HistTransfer], [Statement])
splitHistory = partitionEithers . fmap go
where
go (HistTransfer x) = Left x
go (HistStatement x) = Right x
insertHistory
:: (MonadInsertError m, MonadSqlQuery m, MonadFinance m)
=> [(CommitR, [RawTx])]
-> m ()
insertHistory hs = do
bs <- balanceTxs $ concatMap (\(c, xs) -> fmap (c,) xs) hs
forM_ (groupKey (\(CommitR h _) -> h) bs) $ \(c, ts) -> do
ck <- insert c
mapM_ (insertTx ck) ts
groupKey :: Ord c => (a -> c) -> [(a, b)] -> [(a, [b])]
groupKey f = fmap go . NE.groupAllWith (f . fst)
where
go xs@((c, _) :| _) = (c, NE.toList $ fmap snd xs)
readHistTransfer
:: (MonadInsertError m, MonadFinance m)
=> HistTransfer
-> m (Maybe (CommitR, [RawTx]))
readHistTransfer
m@Transfer
{ transFrom = from
, transTo = to
, transCurrency = u
, transAmounts = amts
} = do
whenHash_ CTManual m $ do
bounds <- askDBState kmStatementInterval
let precRes = lookupCurrencyPrec u
let go Amount {amtWhen, amtValue, amtDesc} = do
let dayRes = liftExcept $ expandDatePat bounds amtWhen
(days, precision) <- combineError dayRes precRes (,)
let tx day = txPair day from to u (roundPrecision precision amtValue) amtDesc
return $ fmap tx days
concat <$> mapErrors go amts
readHistStmt
:: (MonadUnliftIO m, MonadFinance m)
=> FilePath
-> Statement
-> m (Maybe (CommitR, [RawTx]))
readHistStmt root i = whenHash_ CTImport i $ do
bs <- readImport root i
bounds <- askDBState kmStatementInterval
return $ filter (inDaySpan bounds . txDate) bs
--------------------------------------------------------------------------------
-- low-level transaction stuff
-- TODO tags here?
txPair
:: Day
-> AcntID
-> AcntID
-> CurID
-> Rational
-> T.Text
-> RawTx
txPair day from to cur val desc = tx
where
split a v =
Entry
{ eAcnt = a
, eValue = ConstD v
, eComment = ""
, eCurrency = cur
, eTags = []
}
tx =
Tx
{ txDescr = desc
, txDate = day
, txEntries = [split from (-val), split to val]
}
resolveTx :: (MonadInsertError m, MonadFinance m) => BalTx -> m KeyTx
resolveTx t@Tx {txEntries = ss} =
fmap (\kss -> t {txEntries = kss}) $
combineErrors $
fmap resolveEntry ss
insertTx :: MonadSqlQuery m => CommitRId -> KeyTx -> m ()
insertTx c Tx {txDate = d, txDescr = e, txEntries = ss} = do
k <- insert $ TransactionR c d e
mapM_ (insertEntry k) ss
--------------------------------------------------------------------------------
-- Statements
-- TODO this probably won't scale well (pipes?)
readImport :: (MonadUnliftIO m, MonadFinance m) => FilePath -> Statement -> m [RawTx]
readImport root Statement {stmtTxOpts, stmtParsers, stmtSkipLines, stmtDelim, stmtPaths} = do
let ores = compileOptions stmtTxOpts
let cres = combineErrors $ compileMatch <$> stmtParsers
(compiledOptions, compiledMatches) <- liftIOExcept $ combineError ores cres (,)
let readStmt = readImport_ stmtSkipLines stmtDelim compiledOptions
records <- L.sort . concat <$> mapErrorsIO readStmt paths
m <- askDBState kmCurrency
fromEither $
flip runReader m $
runExceptT $
matchRecords compiledMatches records
where
paths = (root </>) <$> stmtPaths
readImport_
:: MonadUnliftIO m
=> Natural
-> Word
-> TxOptsRe
-> FilePath
-> m [TxRecord]
readImport_ n delim tns p = do
res <- tryIO $ BL.readFile p
bs <- fromEither $ first (InsertException . (: []) . InsertIOError . showT) res
case decodeByNameWithP (parseTxRecord p tns) opts $ skip bs of
Left m -> throwIO $ InsertException [ParseError $ T.pack m]
Right (_, v) -> return $ catMaybes $ V.toList v
where
opts = defaultDecodeOptions {decDelimiter = fromIntegral delim}
skip = BL.intercalate "\n" . L.drop (fromIntegral n) . BL.split 10
-- TODO handle this better, this maybe thing is a hack to skip lines with
-- blank dates but will likely want to make this more flexible
parseTxRecord :: FilePath -> TxOptsRe -> NamedRecord -> Parser (Maybe TxRecord)
parseTxRecord p TxOpts {toDate, toAmountFmt, toDesc, toAmount, toOther, toDateFmt} r = do
d <- r .: T.encodeUtf8 toDate
if d == ""
then return Nothing
else do
a <- parseRational toAmountFmt =<< r .: T.encodeUtf8 toAmount
e <- r .: T.encodeUtf8 toDesc
os <- M.fromList <$> mapM (\n -> (n,) <$> r .: T.encodeUtf8 n) toOther
d' <- parseTimeM True defaultTimeLocale (T.unpack toDateFmt) d
return $ Just $ TxRecord d' a e os p
-- TODO need to somehow balance temporally here (like I do in the budget for
-- directives that "pay off" a balance)
matchRecords :: [MatchRe] -> [TxRecord] -> InsertExceptT CurrencyM [RawTx]
matchRecords ms rs = do
(matched, unmatched, notfound) <- matchAll (matchPriorities ms) rs
case (matched, unmatched, notfound) of
(ms_, [], []) -> return ms_ -- liftInner $ combineErrors $ fmap balanceTx ms_
(_, us, ns) -> throwError $ InsertException [StatementError us ns]
matchPriorities :: [MatchRe] -> [MatchGroup]
matchPriorities =
fmap matchToGroup
. L.groupBy (\a b -> spPriority a == spPriority b)
. L.sortOn (Down . spPriority)
matchToGroup :: [MatchRe] -> MatchGroup
matchToGroup ms =
uncurry MatchGroup $
first (L.sortOn spDate) $
L.partition (isJust . spDate) ms
data MatchGroup = MatchGroup
{ mgDate :: ![MatchRe]
, mgNoDate :: ![MatchRe]
}
deriving (Show)
data Zipped a = Zipped ![a] ![a]
data Unzipped a = Unzipped ![a] ![a] ![a]
initZipper :: [a] -> Zipped a
initZipper = Zipped []
resetZipper :: Zipped a -> Zipped a
resetZipper = initZipper . recoverZipper
recoverZipper :: Zipped a -> [a]
recoverZipper (Zipped as bs) = reverse as ++ bs
zipperSlice
:: (a -> b -> Ordering)
-> b
-> Zipped a
-> Either (Zipped a) (Unzipped a)
zipperSlice f x = go
where
go z@(Zipped _ []) = Left z
go z@(Zipped bs (a : as)) =
case f a x of
GT -> go $ Zipped (a : bs) as
EQ -> Right $ goEq (Unzipped bs [a] as)
LT -> Left z
goEq z@(Unzipped _ _ []) = z
goEq z@(Unzipped bs cs (a : as)) =
case f a x of
GT -> goEq $ Unzipped (a : bs) cs as
EQ -> goEq $ Unzipped bs (a : cs) as
LT -> z
zipperMatch
:: Unzipped MatchRe
-> TxRecord
-> InsertExceptT CurrencyM (Zipped MatchRe, MatchRes RawTx)
zipperMatch (Unzipped bs cs as) x = go [] cs
where
go _ [] = return (Zipped bs $ cs ++ as, MatchFail)
go prev (m : ms) = do
res <- matches m x
case res of
MatchFail -> go (m : prev) ms
skipOrPass ->
let ps = reverse prev
ms' = maybe ms (: ms) (matchDec m)
in return (Zipped bs $ ps ++ ms' ++ as, skipOrPass)
zipperMatch'
:: Zipped MatchRe
-> TxRecord
-> InsertExceptT CurrencyM (Zipped MatchRe, MatchRes RawTx)
zipperMatch' z x = go z
where
go (Zipped bs (a : as)) = do
res <- matches a x
case res of
MatchFail -> go (Zipped (a : bs) as)
skipOrPass ->
return (Zipped (maybe bs (: bs) $ matchDec a) as, skipOrPass)
go z' = return (z', MatchFail)
matchDec :: MatchRe -> Maybe MatchRe
matchDec m = case spTimes m of
Just 1 -> Nothing
Just n -> Just $ m {spTimes = Just $ n - 1}
Nothing -> Just m
matchAll :: [MatchGroup] -> [TxRecord] -> InsertExceptT CurrencyM ([RawTx], [TxRecord], [MatchRe])
matchAll = go ([], [])
where
go (matched, unused) gs rs = case (gs, rs) of
(_, []) -> return (matched, [], unused)
([], _) -> return (matched, rs, unused)
(g : gs', _) -> do
(ts, unmatched, us) <- matchGroup g rs
go (ts ++ matched, us ++ unused) gs' unmatched
matchGroup :: MatchGroup -> [TxRecord] -> InsertExceptT CurrencyM ([RawTx], [TxRecord], [MatchRe])
matchGroup MatchGroup {mgDate = ds, mgNoDate = ns} rs = do
(md, rest, ud) <- matchDates ds rs
(mn, unmatched, un) <- matchNonDates ns rest
return (md ++ mn, unmatched, filter ((/= Nothing) . spTimes) $ ud ++ un)
matchDates :: [MatchRe] -> [TxRecord] -> InsertExceptT CurrencyM ([RawTx], [TxRecord], [MatchRe])
matchDates ms = go ([], [], initZipper ms)
where
go (matched, unmatched, z) [] =
return
( catMaybes matched
, reverse unmatched
, recoverZipper z
)
go (matched, unmatched, z) (r : rs) =
case zipperSlice findDate r z of
Left zipped -> go (matched, r : unmatched, zipped) rs
Right unzipped -> do
(z', res) <- zipperMatch unzipped r
let (m, u) = case res of
(MatchPass p) -> (Just p : matched, unmatched)
MatchSkip -> (Nothing : matched, unmatched)
MatchFail -> (matched, r : unmatched)
go (m, u, z') rs
findDate m r = maybe EQ (`compareDate` trDate r) $ spDate m
matchNonDates :: [MatchRe] -> [TxRecord] -> InsertExceptT CurrencyM ([RawTx], [TxRecord], [MatchRe])
matchNonDates ms = go ([], [], initZipper ms)
where
go (matched, unmatched, z) [] =
return
( catMaybes matched
, reverse unmatched
, recoverZipper z
)
go (matched, unmatched, z) (r : rs) = do
(z', res) <- zipperMatch' z r
let (m, u) = case res of
MatchPass p -> (Just p : matched, unmatched)
MatchSkip -> (Nothing : matched, unmatched)
MatchFail -> (matched, r : unmatched)
in go (m, u, resetZipper z') rs
balanceTxs
:: (MonadInsertError m, MonadFinance m)
=> [(CommitR, RawTx)]
-> m [(CommitR, KeyTx)]
balanceTxs ts = do
bs <- mapM balanceTx $ snd $ L.mapAccumR balanceTxTargets M.empty ts'
return $ zip cs bs
where
(cs, ts') = L.unzip $ L.sortOn (txDate . snd) ts
balanceTxTargets
:: M.Map a Rational
-> Tx (Entry a (Deferred Rational) c t)
-> (M.Map a Rational, Tx (Entry a (Maybe Rational) c t))
balanceTxTargets = undefined
balanceEntryTargets
:: M.Map a Rational
-> Entry a (Deferred Rational) c t
-> (M.Map a Rational, Entry a (Maybe Rational) c t)
balanceEntryTargets = undefined
balanceTx
:: (MonadInsertError m, MonadFinance m)
=> Tx (Entry AcntID (Maybe Rational) CurID TagID)
-> m KeyTx
balanceTx t@Tx {txEntries = ss} = do
bs <- liftExcept $ balanceEntries ss
resolveTx $ t {txEntries = bs}
balanceEntries :: [Entry AcntID (Maybe Rational) CurID TagID] -> InsertExcept [BalEntry]
balanceEntries ss =
fmap concat
<$> mapM (uncurry bal)
$ groupByKey
$ fmap (\s -> (eCurrency s, s)) ss
where
haeValue s@Entry {eValue = Just v} = Right s {eValue = v}
haeValue s = Left s
bal cur rss
| length rss < 2 = throwError $ InsertException [BalanceError TooFewEntries cur rss]
| otherwise = case partitionEithers $ fmap haeValue rss of
([noVal], val) -> return $ noVal {eValue = foldr (\s x -> x - eValue s) 0 val} : val
([], val) -> return val
_ -> throwError $ InsertException [BalanceError NotOneBlank cur rss]
groupByKey :: Ord k => [(k, v)] -> [(k, [v])]
groupByKey = M.toList . M.fromListWith (++) . fmap (second (: []))