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hledger/hledger-lib/Hledger/Read/RulesReader.hs
Simon Michael 8f1ae401f4 dev: fix some partial head/tails, silence ghc 9.8's new warnings 
Note the headErr/tailErr calls will print stack traces if they fail
(small ones: five lines, one of which is the useful location info),
which may or may not be best UX.
2024-02-28 15:58:21 -10:00

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--- * module
--- ** doc
-- In Emacs, use TAB on lines beginning with "-- *" to collapse/expand sections.
{-|
A reader for a CSV rules file.
This reads the actual data from a file specified by a `source` rule
or from a similarly-named file in the same directory.
Most of the code for reading rules files and csv files is in this module.
-}
-- Lots of haddocks in this file are for non-exported types.
-- Here's a command that will render them:
-- stack haddock hledger-lib --fast --no-haddock-deps --haddock-arguments='--ignore-all-exports' --open
--- ** language
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE ViewPatterns #-}
{-# OPTIONS_GHC -Wno-unrecognised-pragmas #-}
{-# LANGUAGE LambdaCase #-}
--- ** exports
module Hledger.Read.RulesReader (
-- * Reader
reader,
-- * Misc.
readJournalFromCsv,
-- readRulesFile,
-- parseCsvRules,
-- validateCsvRules,
-- CsvRules,
dataFileFor,
rulesFileFor,
parseBalanceAssertionType,
-- * Tests
tests_RulesReader,
)
where
--- ** imports
import Prelude hiding (Applicative(..))
import Control.Applicative (Applicative(..))
import Control.Monad (unless, when, void)
import Control.Monad.Except (ExceptT(..), liftEither, throwError)
import qualified Control.Monad.Fail as Fail
import Control.Monad.IO.Class (MonadIO, liftIO)
import Control.Monad.State.Strict (StateT, get, modify', evalStateT)
import Control.Monad.Trans.Class (lift)
import Data.Char (toLower, isDigit, isSpace, isAlphaNum, ord)
import Data.Bifunctor (first)
import Data.Functor ((<&>))
import Data.List (elemIndex, foldl', mapAccumL, nub, sortOn)
import Data.List.Extra (groupOn)
import Data.Maybe (catMaybes, fromMaybe, isJust)
import Data.MemoUgly (memo)
import qualified Data.Set as S
import Data.Text (Text)
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
import qualified Data.Text.IO as T
import Data.Time ( Day, TimeZone, UTCTime, LocalTime, ZonedTime(ZonedTime),
defaultTimeLocale, getCurrentTimeZone, localDay, parseTimeM, utcToLocalTime, localTimeToUTC, zonedTimeToUTC)
import Safe (atMay, headMay, lastMay, readMay)
import System.FilePath ((</>), takeDirectory, takeExtension, stripExtension, takeFileName)
import qualified Data.Csv as Cassava
import qualified Data.Csv.Parser.Megaparsec as CassavaMegaparsec
import qualified Data.ByteString as B
import qualified Data.ByteString.Lazy as BL
import Data.Foldable (asum, toList)
import Text.Megaparsec hiding (match, parse)
import Text.Megaparsec.Char (char, newline, string, digitChar)
import Text.Megaparsec.Custom (parseErrorAt)
import Text.Printf (printf)
import Hledger.Data
import Hledger.Utils
import Hledger.Read.Common (aliasesFromOpts, Reader(..), InputOpts(..), amountp, statusp, journalFinalise, accountnamep, commenttagsp )
import Hledger.Read.CsvUtils
import System.Directory (doesFileExist, getHomeDirectory)
import Data.Either (fromRight)
--- ** doctest setup
-- $setup
-- >>> :set -XOverloadedStrings
--- ** reader
_READER__________________________________________ = undefined -- VSCode outline separator
reader :: MonadIO m => Reader m
reader = Reader
{rFormat = Rules
,rExtensions = ["rules"]
,rReadFn = parse
,rParser = error' "sorry, rules files can't be included" -- PARTIAL:
}
isFileName f = takeFileName f == f
getDownloadDir = do
home <- getHomeDirectory
return $ home </> "Downloads" -- XXX
-- | Parse and post-process a "Journal" from the given rules file path, or give an error.
-- A data file is inferred from the @source@ rule, otherwise from a similarly-named file
-- in the same directory.
-- The source rule can specify a glob pattern and supports ~ for home directory.
-- If it is a bare filename it will be relative to the defaut download directory
-- on this system. If is a relative file path it will be relative to the rules
-- file's directory. When a glob pattern matches multiple files, the alphabetically
-- last is used. (Eg in case of multiple numbered downloads, the highest-numbered
-- will be used.)
-- The provided text, or a --rules-file option, are ignored by this reader.
-- Balance assertions are not checked.
parse :: InputOpts -> FilePath -> Text -> ExceptT String IO Journal
parse iopts f _ = do
rules <- readRulesFile $ dbg4 "reading rules file" f
-- XXX higher-than usual debug level for file reading to bypass excessive noise from elsewhere, normally 6 or 7
mdatafile <- liftIO $ do
dldir <- getDownloadDir
let rulesdir = takeDirectory f
let msource = T.unpack <$> getDirective "source" rules
fs <- case msource of
Just src -> expandGlob dir (dbg4 "source" src) >>= sortByModTime <&> dbg4 ("matched files"<>desc<>", newest first")
where (dir,desc) = if isFileName src then (dldir," in download directory") else (rulesdir,"")
Nothing -> return [maybe err (dbg4 "inferred source") $ dataFileFor f] -- shouldn't fail, f has .rules extension
where err = error' $ "could not infer a data file for " <> f
return $ dbg4 "data file" $ headMay fs
case mdatafile of
Nothing -> return nulljournal -- data file specified by source rule was not found
Just dat -> do
exists <- liftIO $ doesFileExist dat
if not (dat=="-" || exists)
then return nulljournal -- data file inferred from rules file name was not found
else do
t <- liftIO $ readFileOrStdinPortably dat
readJournalFromCsv (Just $ Left rules) dat t Nothing
-- apply any command line account aliases. Can fail with a bad replacement pattern.
>>= liftEither . journalApplyAliases (aliasesFromOpts iopts)
-- journalFinalise assumes the journal's items are
-- reversed, as produced by JournalReader's parser.
-- But here they are already properly ordered. So we'd
-- better preemptively reverse them once more. XXX inefficient
. journalReverse
>>= journalFinalise iopts{balancingopts_=(balancingopts_ iopts){ignore_assertions_=True}} f ""
--- ** reading rules files
--- *** rules utilities
_RULES_READING__________________________________________ = undefined
-- | Given a rules file path, what would be the corresponding data file ?
-- (Remove a .rules extension.)
dataFileFor :: FilePath -> Maybe FilePath
dataFileFor = stripExtension "rules"
-- | Given a csv file path, what would be the corresponding rules file ?
-- (Add a .rules extension.)
rulesFileFor :: FilePath -> FilePath
rulesFileFor = (++ ".rules")
-- | An exception-throwing IO action that reads and validates
-- the specified CSV rules file (which may include other rules files).
readRulesFile :: FilePath -> ExceptT String IO CsvRules
readRulesFile f =
liftIO (do
dbg6IO "using conversion rules file" f
readFilePortably f >>= expandIncludes (takeDirectory f)
) >>= either throwError return . parseAndValidateCsvRules f
-- | Inline all files referenced by include directives in this hledger CSV rules text, recursively.
-- Included file paths may be relative to the directory of the provided file path.
-- This is done as a pre-parse step to simplify the CSV rules parser.
expandIncludes :: FilePath -> Text -> IO Text
expandIncludes dir0 content = mapM (expandLine dir0) (T.lines content) <&> T.unlines
where
expandLine dir1 line =
case line of
(T.stripPrefix "include " -> Just f) -> expandIncludes dir2 =<< T.readFile f'
where
f' = dir1 </> T.unpack (T.dropWhile isSpace f)
dir2 = takeDirectory f'
_ -> return line
-- defaultRulesText :: FilePath -> Text
-- defaultRulesText _csvfile = T.pack $ unlines
-- ["# hledger csv conversion rules" -- for " ++ csvFileFor (takeFileName csvfile)
-- ,"# cf http://hledger.org/hledger.html#csv"
-- ,""
-- ,"account1 assets:bank:checking"
-- ,""
-- ,"fields date, description, amount1"
-- ,""
-- ,"#skip 1"
-- ,"#newest-first"
-- ,""
-- ,"#date-format %-d/%-m/%Y"
-- ,"#date-format %-m/%-d/%Y"
-- ,"#date-format %Y-%h-%d"
-- ,""
-- ,"#currency $"
-- ,""
-- ,"if ITUNES"
-- ," account2 expenses:entertainment"
-- ,""
-- ,"if (TO|FROM) SAVINGS"
-- ," account2 assets:bank:savings\n"
-- ]
-- | An error-throwing IO action that parses this text as CSV conversion rules
-- and runs some extra validation checks. The file path is used in error messages.
parseAndValidateCsvRules :: FilePath -> T.Text -> Either String CsvRules
parseAndValidateCsvRules rulesfile s =
case parseCsvRules rulesfile s of
Left err -> Left $ customErrorBundlePretty err
Right rules -> first makeFancyParseError $ validateCsvRules rules
where
makeFancyParseError :: String -> String
makeFancyParseError errorString =
parseErrorPretty (FancyError 0 (S.singleton $ ErrorFail errorString) :: ParseError Text String)
instance ShowErrorComponent String where
showErrorComponent = id
-- | Parse this text as CSV conversion rules. The file path is for error messages.
parseCsvRules :: FilePath -> T.Text -> Either (ParseErrorBundle T.Text HledgerParseErrorData) CsvRules
-- parseCsvRules rulesfile s = runParser csvrulesfile nullrules{baseAccount=takeBaseName rulesfile} rulesfile s
parseCsvRules = runParser (evalStateT rulesp defrules)
-- | Return the validated rules, or an error.
validateCsvRules :: CsvRules -> Either String CsvRules
validateCsvRules rules = do
unless (isAssigned "date") $ Left "Please specify (at top level) the date field. Eg: date %1"
Right rules
where
isAssigned f = isJust $ getEffectiveAssignment rules [] f
--- *** rules types
_RULES_TYPES__________________________________________ = undefined
-- | A set of data definitions and account-matching patterns sufficient to
-- convert a particular CSV data file into meaningful journal transactions.
data CsvRules' a = CsvRules' {
rdirectives :: [(DirectiveName,Text)],
-- ^ top-level rules, as (keyword, value) pairs
rcsvfieldindexes :: [(CsvFieldName, CsvFieldIndex)],
-- ^ csv field names and their column number, if declared by a fields list
rassignments :: [(HledgerFieldName, FieldTemplate)],
-- ^ top-level assignments to hledger fields, as (field name, value template) pairs
rconditionalblocks :: [ConditionalBlock],
-- ^ conditional blocks, which containing additional assignments/rules to apply to matched csv records
rblocksassigning :: a -- (String -> [ConditionalBlock])
-- ^ all conditional blocks which can potentially assign field with a given name (memoized)
}
-- | Type used by parsers. Directives, assignments and conditional blocks
-- are in the reverse order compared to what is in the file and rblocksassigning is non-functional,
-- could not be used for processing CSV records yet
type CsvRulesParsed = CsvRules' ()
-- | Type used after parsing is done. Directives, assignments and conditional blocks
-- are in the same order as they were in the input file and rblocksassigning is functional.
-- Ready to be used for CSV record processing
type CsvRules = CsvRules' (Text -> [ConditionalBlock]) -- XXX simplify
instance Eq CsvRules where
r1 == r2 = (rdirectives r1, rcsvfieldindexes r1, rassignments r1) ==
(rdirectives r2, rcsvfieldindexes r2, rassignments r2)
-- Custom Show instance used for debug output: omit the rblocksassigning field, which isn't showable.
instance Show CsvRules where
show r = "CsvRules { rdirectives = " ++ show (rdirectives r) ++
", rcsvfieldindexes = " ++ show (rcsvfieldindexes r) ++
", rassignments = " ++ show (rassignments r) ++
", rconditionalblocks = " ++ show (rconditionalblocks r) ++
" }"
type CsvRulesParser a = StateT CsvRulesParsed SimpleTextParser a
-- | The keyword of a CSV rule - "fields", "skip", "if", etc.
type DirectiveName = Text
-- | CSV field name.
type CsvFieldName = Text
-- | 1-based CSV column number.
type CsvFieldIndex = Int
-- | Percent symbol followed by a CSV field name or column number. Eg: %date, %1.
type CsvFieldReference = Text
-- | One of the standard hledger fields or pseudo-fields that can be assigned to.
-- Eg date, account1, amount, amount1-in, date-format.
type HledgerFieldName = Text
-- | A text value to be assigned to a hledger field, possibly
-- containing csv field references to be interpolated.
type FieldTemplate = Text
-- | A reference to a regular expression match group. Eg \1.
type MatchGroupReference = Text
-- | A strptime date parsing pattern, as supported by Data.Time.Format.
type DateFormat = Text
-- | A prefix for a matcher test, either & or none (implicit or).
data MatcherPrefix = And | Not | None
deriving (Show, Eq)
-- | A single test for matching a CSV record, in one way or another.
data Matcher =
RecordMatcher MatcherPrefix Regexp -- ^ match if this regexp matches the overall CSV record
| FieldMatcher MatcherPrefix CsvFieldReference Regexp -- ^ match if this regexp matches the referenced CSV field's value
deriving (Show, Eq)
-- | A conditional block: a set of CSV record matchers, and a sequence
-- of rules which will be enabled only if one or more of the matchers
-- succeeds.
--
-- Three types of rule are allowed inside conditional blocks: field
-- assignments, skip, end. (A skip or end rule is stored as if it was
-- a field assignment, and executed in validateCsv. XXX)
data ConditionalBlock = CB {
cbMatchers :: [Matcher]
,cbAssignments :: [(HledgerFieldName, FieldTemplate)]
} deriving (Show, Eq)
defrules :: CsvRulesParsed
defrules = CsvRules' {
rdirectives=[],
rcsvfieldindexes=[],
rassignments=[],
rconditionalblocks=[],
rblocksassigning = ()
}
-- | Create CsvRules from the content parsed out of the rules file
mkrules :: CsvRulesParsed -> CsvRules
mkrules rules =
let conditionalblocks = reverse $ rconditionalblocks rules
maybeMemo = if length conditionalblocks >= 15 then memo else id
in
CsvRules' {
rdirectives=reverse $ rdirectives rules,
rcsvfieldindexes=rcsvfieldindexes rules,
rassignments=reverse $ rassignments rules,
rconditionalblocks=conditionalblocks,
rblocksassigning = maybeMemo (\f -> filter (any ((==f).fst) . cbAssignments) conditionalblocks)
}
--- *** rules parsers
_RULES_PARSING__________________________________________ = undefined
{-
Grammar for the CSV conversion rules, more or less:
RULES: RULE*
RULE: ( SOURCE | FIELD-LIST | FIELD-ASSIGNMENT | CONDITIONAL-BLOCK | SKIP | TIMEZONE | NEWEST-FIRST | INTRA-DAY-REVERSED | DATE-FORMAT | DECIMAL-MARK | COMMENT | BLANK ) NEWLINE
SOURCE: source SPACE FILEPATH
FIELD-LIST: fields SPACE FIELD-NAME ( SPACE? , SPACE? FIELD-NAME )*
FIELD-NAME: QUOTED-FIELD-NAME | BARE-FIELD-NAME
QUOTED-FIELD-NAME: " (any CHAR except double-quote)+ "
BARE-FIELD-NAME: any CHAR except space, tab, #, ;
FIELD-ASSIGNMENT: JOURNAL-FIELD ASSIGNMENT-SEPARATOR FIELD-VALUE
JOURNAL-FIELD: date | date2 | status | code | description | comment | account1 | account2 | amount | JOURNAL-PSEUDO-FIELD
JOURNAL-PSEUDO-FIELD: amount-in | amount-out | currency
ASSIGNMENT-SEPARATOR: SPACE | ( : SPACE? )
FIELD-VALUE: VALUE (possibly containing CSV-FIELD-REFERENCEs and REGEX-MATCHGROUP-REFERENCEs)
CSV-FIELD-REFERENCE: % CSV-FIELD
REGEX-MATCHGROUP-REFERENCE: \ DIGIT+
CSV-FIELD: ( FIELD-NAME | FIELD-NUMBER ) (corresponding to a CSV field)
FIELD-NUMBER: DIGIT+
CONDITIONAL-BLOCK: if ( FIELD-MATCHER NEWLINE )+ INDENTED-BLOCK
FIELD-MATCHER: ( CSV-FIELD-NAME SPACE? )? ( MATCHOP SPACE? )? PATTERNS
MATCHOP: ~
PATTERNS: ( NEWLINE REGEXP )* REGEXP
INDENTED-BLOCK: ( SPACE ( FIELD-ASSIGNMENT | COMMENT ) NEWLINE )+
REGEXP: ( NONSPACE CHAR* ) SPACE?
VALUE: SPACE? ( CHAR* ) SPACE?
COMMENT: SPACE? COMMENT-CHAR VALUE
COMMENT-CHAR: # | ; | *
NONSPACE: any CHAR not a SPACE-CHAR
BLANK: SPACE?
SPACE: SPACE-CHAR+
SPACE-CHAR: space | tab
CHAR: any character except newline
DIGIT: 0-9
-}
addDirective :: (DirectiveName, Text) -> CsvRulesParsed -> CsvRulesParsed
addDirective d r = r{rdirectives=d:rdirectives r}
addAssignment :: (HledgerFieldName, FieldTemplate) -> CsvRulesParsed -> CsvRulesParsed
addAssignment a r = r{rassignments=a:rassignments r}
setIndexesAndAssignmentsFromList :: [CsvFieldName] -> CsvRulesParsed -> CsvRulesParsed
setIndexesAndAssignmentsFromList fs = addAssignmentsFromList fs . setCsvFieldIndexesFromList fs
where
setCsvFieldIndexesFromList :: [CsvFieldName] -> CsvRulesParsed -> CsvRulesParsed
setCsvFieldIndexesFromList fs' r = r{rcsvfieldindexes=zip fs' [1..]}
addAssignmentsFromList :: [CsvFieldName] -> CsvRulesParsed -> CsvRulesParsed
addAssignmentsFromList fs' r = foldl' maybeAddAssignment r journalfieldnames
where
maybeAddAssignment rules f = (maybe id addAssignmentFromIndex $ elemIndex f fs') rules
where
addAssignmentFromIndex i = addAssignment (f, T.pack $ '%':show (i+1))
addConditionalBlock :: ConditionalBlock -> CsvRulesParsed -> CsvRulesParsed
addConditionalBlock b r = r{rconditionalblocks=b:rconditionalblocks r}
addConditionalBlocks :: [ConditionalBlock] -> CsvRulesParsed -> CsvRulesParsed
addConditionalBlocks bs r = r{rconditionalblocks=bs++rconditionalblocks r}
rulesp :: CsvRulesParser CsvRules
rulesp = do
_ <- many $ choice
[blankorcommentlinep <?> "blank or comment line"
,(directivep >>= modify' . addDirective) <?> "directive"
,(fieldnamelistp >>= modify' . setIndexesAndAssignmentsFromList) <?> "field name list"
,(fieldassignmentp >>= modify' . addAssignment) <?> "field assignment"
-- conditionalblockp backtracks because it shares "if" prefix with conditionaltablep.
,try (conditionalblockp >>= modify' . addConditionalBlock) <?> "conditional block"
-- 'reverse' is there to ensure that conditions are added in the order they listed in the file
,(conditionaltablep >>= modify' . addConditionalBlocks . reverse) <?> "conditional table"
]
eof
mkrules <$> get
blankorcommentlinep :: CsvRulesParser ()
blankorcommentlinep = lift (dbgparse 8 "trying blankorcommentlinep") >> choiceInState [blanklinep, commentlinep]
blanklinep :: CsvRulesParser ()
blanklinep = lift skipNonNewlineSpaces >> newline >> return () <?> "blank line"
commentlinep :: CsvRulesParser ()
commentlinep = lift skipNonNewlineSpaces >> commentcharp >> lift restofline >> return () <?> "comment line"
commentcharp :: CsvRulesParser Char
commentcharp = oneOf (";#*" :: [Char])
directivep :: CsvRulesParser (DirectiveName, Text)
directivep = (do
lift $ dbgparse 8 "trying directive"
d <- choiceInState $ map (lift . string) directives
v <- (((char ':' >> lift (many spacenonewline)) <|> lift (some spacenonewline)) >> directivevalp)
<|> (optional (char ':') >> lift skipNonNewlineSpaces >> lift eolof >> return "")
return (d, v)
) <?> "directive"
directives :: [Text]
directives =
["source"
,"date-format"
,"decimal-mark"
,"separator"
-- ,"default-account"
-- ,"default-currency"
,"skip"
,"timezone"
,"newest-first"
,"intra-day-reversed"
, "balance-type"
]
directivevalp :: CsvRulesParser Text
directivevalp = T.pack <$> anySingle `manyTill` lift eolof
fieldnamelistp :: CsvRulesParser [CsvFieldName]
fieldnamelistp = (do
lift $ dbgparse 8 "trying fieldnamelist"
string "fields"
optional $ char ':'
lift skipNonNewlineSpaces1
let separator = lift skipNonNewlineSpaces >> char ',' >> lift skipNonNewlineSpaces
f <- fromMaybe "" <$> optional fieldnamep
fs <- some $ (separator >> fromMaybe "" <$> optional fieldnamep)
lift restofline
return . map T.toLower $ f:fs
) <?> "field name list"
fieldnamep :: CsvRulesParser Text
fieldnamep = quotedfieldnamep <|> barefieldnamep
quotedfieldnamep :: CsvRulesParser Text
quotedfieldnamep =
char '"' *> takeWhile1P Nothing (`notElem` ("\"\n:;#~" :: [Char])) <* char '"'
barefieldnamep :: CsvRulesParser Text
barefieldnamep = takeWhile1P Nothing (`notElem` (" \t\n,;#~" :: [Char]))
fieldassignmentp :: CsvRulesParser (HledgerFieldName, FieldTemplate)
fieldassignmentp = do
lift $ dbgparse 8 "trying fieldassignmentp"
f <- journalfieldnamep
v <- choiceInState [ assignmentseparatorp >> fieldvalp
, lift eolof >> return ""
]
return (f,v)
<?> "field assignment"
journalfieldnamep :: CsvRulesParser Text
journalfieldnamep = do
lift (dbgparse 8 "trying journalfieldnamep")
choiceInState $ map (lift . string) journalfieldnames
maxpostings = 99
-- Transaction fields and pseudo fields for CSV conversion.
-- Names must precede any other name they contain, for the parser
-- (amount-in before amount; date2 before date). TODO: fix
journalfieldnames =
concat [[ "account" <> i
,"amount" <> i <> "-in"
,"amount" <> i <> "-out"
,"amount" <> i
,"balance" <> i
,"comment" <> i
,"currency" <> i
] | x <- [maxpostings, (maxpostings-1)..1], let i = T.pack $ show x]
++
["amount-in"
,"amount-out"
,"amount"
,"balance"
,"code"
,"comment"
,"currency"
,"date2"
,"date"
,"description"
,"status"
,"skip" -- skip and end are not really fields, but we list it here to allow conditional rules that skip records
,"end"
]
assignmentseparatorp :: CsvRulesParser ()
assignmentseparatorp = do
lift $ dbgparse 8 "trying assignmentseparatorp"
_ <- choiceInState [ lift skipNonNewlineSpaces >> char ':' >> lift skipNonNewlineSpaces
, lift skipNonNewlineSpaces1
]
return ()
fieldvalp :: CsvRulesParser Text
fieldvalp = do
lift $ dbgparse 8 "trying fieldvalp"
T.pack <$> anySingle `manyTill` lift eolof
-- A conditional block: one or more matchers, one per line, followed by one or more indented rules.
conditionalblockp :: CsvRulesParser ConditionalBlock
conditionalblockp = do
lift $ dbgparse 8 "trying conditionalblockp"
-- "if\nMATCHER" or "if \nMATCHER" or "if MATCHER"
start <- getOffset
string "if" >> ( (newline >> return Nothing)
<|> (lift skipNonNewlineSpaces1 >> optional newline))
ms <- some matcherp
as <- catMaybes <$>
many (lift skipNonNewlineSpaces1 >>
choice [ lift eolof >> return Nothing
, fmap Just fieldassignmentp
])
when (null as) $
customFailure $ parseErrorAt start $ "start of conditional block found, but no assignment rules afterward\n(assignment rules in a conditional block should be indented)"
return $ CB{cbMatchers=ms, cbAssignments=as}
<?> "conditional block"
-- A conditional table: "if" followed by separator, followed by some field names,
-- followed by many lines, each of which has:
-- one matchers, followed by field assignments (as many as there were fields)
conditionaltablep :: CsvRulesParser [ConditionalBlock]
conditionaltablep = do
lift $ dbgparse 8 "trying conditionaltablep"
start <- getOffset
string "if"
sep <- lift $ satisfy (\c -> not (isAlphaNum c || isSpace c))
fields <- journalfieldnamep `sepBy1` (char sep)
newline
body <- flip manyTill (lift eolof) $ do
off <- getOffset
m <- matcherp' $ void $ char sep
vs <- T.split (==sep) . T.pack <$> lift restofline
if (length vs /= length fields)
then customFailure $ parseErrorAt off $ ((printf "line of conditional table should have %d values, but this one has only %d" (length fields) (length vs)) :: String)
else return (m,vs)
when (null body) $
customFailure $ parseErrorAt start $ "start of conditional table found, but no assignment rules afterward"
return $ flip map body $ \(m,vs) ->
CB{cbMatchers=[m], cbAssignments=zip fields vs}
<?> "conditional table"
-- A single matcher, on one line.
matcherp' :: CsvRulesParser () -> CsvRulesParser Matcher
matcherp' end = try (fieldmatcherp end) <|> recordmatcherp end
matcherp :: CsvRulesParser Matcher
matcherp = matcherp' (lift eolof)
-- A single whole-record matcher.
-- A pattern on the whole line, not beginning with a csv field reference.
recordmatcherp :: CsvRulesParser () -> CsvRulesParser Matcher
recordmatcherp end = do
lift $ dbgparse 8 "trying recordmatcherp"
-- pos <- currentPos
-- _ <- optional (matchoperatorp >> lift skipNonNewlineSpaces >> optional newline)
p <- matcherprefixp
r <- regexp end
return $ RecordMatcher p r
-- when (null ps) $
-- Fail.fail "start of record matcher found, but no patterns afterward\n(patterns should not be indented)"
<?> "record matcher"
-- | A single matcher for a specific field. A csv field reference
-- (like %date or %1), and a pattern on the rest of the line,
-- optionally space-separated. Eg:
-- %description chez jacques
fieldmatcherp :: CsvRulesParser () -> CsvRulesParser Matcher
fieldmatcherp end = do
lift $ dbgparse 8 "trying fieldmatcher"
-- An optional fieldname (default: "all")
-- f <- fromMaybe "all" `fmap` (optional $ do
-- f' <- fieldnamep
-- lift skipNonNewlineSpaces
-- return f')
p <- matcherprefixp
f <- csvfieldreferencep <* lift skipNonNewlineSpaces
-- optional operator.. just ~ (case insensitive infix regex) for now
-- _op <- fromMaybe "~" <$> optional matchoperatorp
lift skipNonNewlineSpaces
r <- regexp end
return $ FieldMatcher p f r
<?> "field matcher"
matcherprefixp :: CsvRulesParser MatcherPrefix
matcherprefixp = do
lift $ dbgparse 8 "trying matcherprefixp"
(char '&' >> lift skipNonNewlineSpaces >> return And) <|> (char '!' >> lift skipNonNewlineSpaces >> return Not) <|> return None
csvfieldreferencep :: CsvRulesParser CsvFieldReference
csvfieldreferencep = do
lift $ dbgparse 8 "trying csvfieldreferencep"
char '%'
T.cons '%' . textQuoteIfNeeded <$> fieldnamep
-- A single regular expression
regexp :: CsvRulesParser () -> CsvRulesParser Regexp
regexp end = do
lift $ dbgparse 8 "trying regexp"
-- notFollowedBy matchoperatorp
c <- lift nonspace
cs <- anySingle `manyTill` end
case toRegexCI . T.strip . T.pack $ c:cs of
Left x -> Fail.fail $ "CSV parser: " ++ x
Right x -> return x
-- -- A match operator, indicating the type of match to perform.
-- -- Currently just ~ meaning case insensitive infix regex match.
-- matchoperatorp :: CsvRulesParser String
-- matchoperatorp = fmap T.unpack $ choiceInState $ map string
-- ["~"
-- -- ,"!~"
-- -- ,"="
-- -- ,"!="
-- ]
_RULES_LOOKUP__________________________________________ = undefined
getDirective :: DirectiveName -> CsvRules -> Maybe FieldTemplate
getDirective directivename = lookup directivename . rdirectives
-- | Look up the value (template) of a csv rule by rule keyword.
csvRule :: CsvRules -> DirectiveName -> Maybe FieldTemplate
csvRule rules = (`getDirective` rules)
-- | Look up the value template assigned to a hledger field by field
-- list/field assignment rules, taking into account the current record and
-- conditional rules.
hledgerField :: CsvRules -> CsvRecord -> HledgerFieldName -> Maybe FieldTemplate
hledgerField = getEffectiveAssignment
-- | Look up the final value assigned to a hledger field, with csv field
-- references interpolated.
hledgerFieldValue :: CsvRules -> CsvRecord -> HledgerFieldName -> Maybe Text
hledgerFieldValue rules record f = (fmap (renderTemplate rules record f) . hledgerField rules record) f
maybeNegate :: MatcherPrefix -> Bool -> Bool
maybeNegate Not origbool = not origbool
maybeNegate _ origbool = origbool
-- | Given the conversion rules, a CSV record and a hledger field name, find
-- the value template ultimately assigned to this field, if any, by a field
-- assignment at top level or in a conditional block matching this record.
--
-- Note conditional blocks' patterns are matched against an approximation of the
-- CSV record: all the field values, without enclosing quotes, comma-separated.
--
getEffectiveAssignment :: CsvRules -> CsvRecord -> HledgerFieldName -> Maybe FieldTemplate
getEffectiveAssignment rules record f = lastMay $ map snd $ assignments
where
-- all active assignments to field f, in order
assignments = dbg9 "csv assignments" $ filter ((==f).fst) $ toplevelassignments ++ conditionalassignments
-- all top level field assignments
toplevelassignments = rassignments rules
-- all field assignments in conditional blocks assigning to field f and active for the current csv record
conditionalassignments = concatMap cbAssignments $ filter (isBlockActive rules record) $ (rblocksassigning rules) f
-- does this conditional block match the current csv record ?
isBlockActive :: CsvRules -> CsvRecord -> ConditionalBlock -> Bool
isBlockActive rules record CB{..} = any (all matcherMatches) $ groupedMatchers cbMatchers
where
-- does this individual matcher match the current csv record ?
matcherMatches :: Matcher -> Bool
matcherMatches (RecordMatcher prefix pat) = maybeNegate prefix origbool
where
pat' = dbg7 "regex" pat
-- A synthetic whole CSV record to match against. Note, this can be
-- different from the original CSV data:
-- - any whitespace surrounding field values is preserved
-- - any quotes enclosing field values are removed
-- - and the field separator is always comma
-- which means that a field containing a comma will look like two fields.
wholecsvline = dbg7 "wholecsvline" $ T.intercalate "," record
origbool = regexMatchText pat' wholecsvline
matcherMatches (FieldMatcher prefix csvfieldref pat) = maybeNegate prefix origbool
where
-- the value of the referenced CSV field to match against.
csvfieldvalue = dbg7 "csvfieldvalue" $ replaceCsvFieldReference rules record csvfieldref
origbool = regexMatchText pat csvfieldvalue
-- | Group matchers into associative pairs based on prefix, e.g.:
-- A
-- & B
-- C
-- D
-- & E
-- => [[A, B], [C], [D, E]]
groupedMatchers :: [Matcher] -> [[Matcher]]
groupedMatchers [] = []
groupedMatchers (x:xs) = (x:ys) : groupedMatchers zs
where
(ys, zs) = span (\y -> matcherPrefix y == And) xs
matcherPrefix :: Matcher -> MatcherPrefix
matcherPrefix (RecordMatcher prefix _) = prefix
matcherPrefix (FieldMatcher prefix _ _) = prefix
-- | Render a field assignment's template, possibly interpolating referenced
-- CSV field values or match groups. Outer whitespace is removed from interpolated values.
renderTemplate :: CsvRules -> CsvRecord -> HledgerFieldName -> FieldTemplate -> Text
renderTemplate rules record f t =
maybe t mconcat $ parseMaybe
(many
( literaltextp
<|> (matchrefp <&> replaceRegexGroupReference rules record f)
<|> (fieldrefp <&> replaceCsvFieldReference rules record)
)
)
t
where
literaltextp :: SimpleTextParser Text
literaltextp = some (nonBackslashOrPercent <|> nonRefBackslash <|> nonRefPercent) <&> T.pack
where
nonBackslashOrPercent = noneOf ['\\', '%'] <?> "character other than backslash or percent"
nonRefBackslash = try (char '\\' <* notFollowedBy digitChar) <?> "backslash that does not begin a match group reference"
nonRefPercent = try (char '%' <* notFollowedBy (satisfy isFieldNameChar)) <?> "percent that does not begin a field reference"
matchrefp = liftA2 T.cons (char '\\') (takeWhile1P (Just "matchref") isDigit)
fieldrefp = liftA2 T.cons (char '%') (takeWhile1P (Just "reference") isFieldNameChar)
isFieldNameChar c = isAlphaNum c || c == '_' || c == '-'
-- | Replace something that looks like a Regex match group reference with the
-- resulting match group value after applying the Regex.
replaceRegexGroupReference :: CsvRules -> CsvRecord -> HledgerFieldName -> MatchGroupReference -> Text
replaceRegexGroupReference rules record f s = case T.uncons s of
Just ('\\', group) -> fromMaybe "" $ regexMatchValue rules record f group
_ -> s
regexMatchValue :: CsvRules -> CsvRecord -> HledgerFieldName -> Text -> Maybe Text
regexMatchValue rules record f sgroup = let
matchgroups = concatMap (getMatchGroups rules record)
$ concatMap cbMatchers
$ filter (isBlockActive rules record)
$ rblocksassigning rules f
group = (read (T.unpack sgroup) :: Int) - 1 -- adjust to 0-indexing
in atMay matchgroups group
getMatchGroups :: CsvRules -> CsvRecord -> Matcher -> [Text]
getMatchGroups _ record (RecordMatcher _ regex) = let
txt = T.intercalate "," record -- see caveats of wholecsvline, in `isBlockActive`
in regexMatchTextGroups regex txt
getMatchGroups rules record (FieldMatcher _ fieldref regex) = let
txt = replaceCsvFieldReference rules record fieldref
in regexMatchTextGroups regex txt
-- | Replace something that looks like a reference to a csv field ("%date" or "%1)
-- with that field's value. If it doesn't look like a field reference, or if we
-- can't find such a field, replace it with the empty string.
replaceCsvFieldReference :: CsvRules -> CsvRecord -> CsvFieldReference -> Text
replaceCsvFieldReference rules record s = case T.uncons s of
Just ('%', fieldname) -> fromMaybe "" $ csvFieldValue rules record fieldname
_ -> s
-- | Get the (whitespace-stripped) value of a CSV field, identified by its name or
-- column number, ("date" or "1"), from the given CSV record, if such a field exists.
csvFieldValue :: CsvRules -> CsvRecord -> CsvFieldName -> Maybe Text
csvFieldValue rules record fieldname = do
fieldindex <-
if T.all isDigit fieldname
then readMay $ T.unpack fieldname
else lookup (T.toLower fieldname) $ rcsvfieldindexes rules
T.strip <$> atMay record (fieldindex-1)
_CSV_READING__________________________________________ = undefined
-- | Read a Journal from the given CSV data (and filename, used for error
-- messages), or return an error. Proceed as follows:
--
-- 1. Conversion rules are provided, or they are parsed from the specified
-- rules file, or from the default rules file for the CSV data file.
-- If rules parsing fails, or the required rules file does not exist, throw an error.
--
-- 2. Parse the CSV data using the rules, or throw an error.
--
-- 3. Convert the CSV records to hledger transactions using the rules.
--
-- 4. Return the transactions as a Journal.
--
readJournalFromCsv :: Maybe (Either CsvRules FilePath) -> FilePath -> Text -> Maybe SepFormat -> ExceptT String IO Journal
readJournalFromCsv Nothing "-" _ _ = throwError "please use --rules-file when reading CSV from stdin"
readJournalFromCsv merulesfile csvfile csvtext sep = do
-- for now, correctness is the priority here, efficiency not so much
rules <- case merulesfile of
Just (Left rs) -> return rs
Just (Right rulesfile) -> readRulesFile rulesfile
Nothing -> readRulesFile $ rulesFileFor csvfile
dbg6IO "csv rules" rules
-- convert the csv data to lines and remove all empty/blank lines
let csvlines1 = dbg9 "csvlines1" $ filter (not . T.null . T.strip) $ dbg9 "csvlines0" $ T.lines csvtext
-- if there is a top-level skip rule, skip the specified number of non-empty lines
skiplines <- case getDirective "skip" rules of
Nothing -> return 0
Just "" -> return 1
Just s -> maybe (throwError $ "could not parse skip value: " ++ show s) return . readMay $ T.unpack s
let csvlines2 = dbg9 "csvlines2" $ drop skiplines csvlines1
-- convert back to text and parse as csv records
let
csvtext1 = T.unlines csvlines2
-- The separator in the rules file takes precedence over the extension or prefix
separator = case getDirective "separator" rules >>= parseSeparator of
Just c -> c
_ | ext == "ssv" -> ';'
_ | ext == "tsv" -> '\t'
_ ->
case sep of
Just Csv -> ','
Just Ssv -> ';'
Just Tsv -> '\t'
Nothing -> ','
where
ext = map toLower $ drop 1 $ takeExtension csvfile
-- parsec seemed to fail if you pass it "-" here -- TODO: try again with megaparsec
parsecfilename = if csvfile == "-" then "(stdin)" else csvfile
dbg6IO "using separator" separator
-- parse csv records
csvrecords0 <- dbg7 "parseCsv" <$> parseCsv separator parsecfilename csvtext1
-- remove any records skipped by conditional skip or end rules
let csvrecords1 = applyConditionalSkips rules csvrecords0
-- and check the remaining records for any obvious problems
csvrecords <- liftEither $ dbg7 "validateCsv" <$> validateCsv csvrecords1
dbg6IO "first 3 csv records" $ take 3 csvrecords
-- XXX identify header lines some day ?
-- let (headerlines, datalines) = identifyHeaderLines csvrecords'
-- mfieldnames = lastMay headerlines
tzout <- liftIO getCurrentTimeZone
mtzin <- case getDirective "timezone" rules of
Nothing -> return Nothing
Just s ->
maybe (throwError $ "could not parse time zone: " ++ T.unpack s) (return.Just) $
parseTimeM False defaultTimeLocale "%Z" $ T.unpack s
let
-- convert CSV records to transactions, saving the CSV line numbers for error positions
txns = dbg7 "csv txns" $ snd $ mapAccumL
(\pos r ->
let
SourcePos name line col = pos
line' = (mkPos . (+1) . unPos) line
pos' = SourcePos name line' col
in
(pos', transactionFromCsvRecord timesarezoned mtzin tzout pos rules r)
)
(initialPos parsecfilename) csvrecords
where
timesarezoned =
case csvRule rules "date-format" of
Just f | any (`T.isInfixOf` f) ["%Z","%z","%EZ","%Ez"] -> True
_ -> False
-- Do our best to ensure transactions will be ordered chronologically,
-- from oldest to newest. This is done in several steps:
-- 1. Intra-day order: if there's an "intra-day-reversed" rule,
-- assume each day's CSV records were ordered in reverse of the overall date order,
-- so reverse each day's txns.
intradayreversed = dbg6 "intra-day-reversed" $ isJust $ getDirective "intra-day-reversed" rules
txns1 = dbg7 "txns1" $
(if intradayreversed then concatMap reverse . groupOn tdate else id) txns
-- 2. Overall date order: now if there's a "newest-first" rule,
-- or if there's multiple dates and the first is more recent than the last,
-- assume CSV records were ordered newest dates first,
-- so reverse all txns.
newestfirst = dbg6 "newest-first" $ isJust $ getDirective "newest-first" rules
mdatalooksnewestfirst = dbg6 "mdatalooksnewestfirst" $
case nub $ map tdate txns of
ds@(d:_) -> Just $ d > last ds
[] -> Nothing
txns2 = dbg7 "txns2" $
(if newestfirst || mdatalooksnewestfirst == Just True then reverse else id) txns1
-- 3. Disordered dates: in case the CSV records were ordered by chaos,
-- do a final sort by date. If it was only a few records out of order,
-- this will hopefully refine any good ordering done by steps 1 and 2.
txns3 = dbg7 "date-sorted csv txns" $ sortOn tdate txns2
return nulljournal{jtxns=txns3}
-- | Parse special separator names TAB and SPACE, or return the first
-- character. Return Nothing on empty string
parseSeparator :: Text -> Maybe Char
parseSeparator = specials . T.toLower
where specials "space" = Just ' '
specials "tab" = Just '\t'
specials xs = fst <$> T.uncons xs
-- Call parseCassava on a file or stdin, converting the result to ExceptT.
parseCsv :: Char -> FilePath -> Text -> ExceptT String IO [CsvRecord]
parseCsv separator filePath csvtext = ExceptT $
case filePath of
"-" -> parseCassava separator "(stdin)" <$> T.getContents
_ -> return $ if T.null csvtext then Right mempty else parseCassava separator filePath csvtext
-- Parse text into CSV records, using Cassava and the given field separator.
parseCassava :: Char -> FilePath -> Text -> Either String [CsvRecord]
parseCassava separator path content =
-- XXX we now remove all blank lines before parsing; will Cassava will still produce [""] records ?
-- filter (/=[""])
either (Left . errorBundlePretty) (Right . parseResultToCsv) <$>
CassavaMegaparsec.decodeWith decodeOptions Cassava.NoHeader path $
BL.fromStrict $ T.encodeUtf8 content
where
decodeOptions = Cassava.defaultDecodeOptions {
Cassava.decDelimiter = fromIntegral (ord separator)
}
parseResultToCsv :: (Foldable t, Functor t) => t (t B.ByteString) -> [CsvRecord]
parseResultToCsv = toListList . unpackFields
where
toListList = toList . fmap toList
unpackFields = (fmap . fmap) T.decodeUtf8
-- | Scan for csv records where a conditional `skip` or `end` rule applies,
-- and apply that rule, removing one or more following records.
applyConditionalSkips :: CsvRules -> [CsvRecord] -> [CsvRecord]
applyConditionalSkips _ [] = []
applyConditionalSkips rules (r:rest) =
case skipnum r of
Nothing -> r : applyConditionalSkips rules rest
Just cnt -> applyConditionalSkips rules $ drop (cnt-1) rest
where
skipnum r1 =
case (getEffectiveAssignment rules r1 "end", getEffectiveAssignment rules r1 "skip") of
(Nothing, Nothing) -> Nothing
(Just _, _) -> Just maxBound
(Nothing, Just "") -> Just 1
(Nothing, Just x) -> Just (read $ T.unpack x)
-- | Do some validation on the parsed CSV records:
-- check that they all have at least two fields.
validateCsv :: [CsvRecord] -> Either String [CsvRecord]
validateCsv [] = Right []
validateCsv rs@(_first:_) =
case lessthan2 of
Just r -> Left $ printf "CSV record %s has less than two fields" (show r)
Nothing -> Right rs
where
lessthan2 = headMay $ filter ((<2).length) rs
-- -- | The highest (0-based) field index referenced in the field
-- -- definitions, or -1 if no fields are defined.
-- maxFieldIndex :: CsvRules -> Int
-- maxFieldIndex r = maximumDef (-1) $ catMaybes [
-- dateField r
-- ,statusField r
-- ,codeField r
-- ,amountField r
-- ,amountInField r
-- ,amountOutField r
-- ,currencyField r
-- ,accountField r
-- ,account2Field r
-- ,date2Field r
-- ]
--- ** converting csv records to transactions
transactionFromCsvRecord :: Bool -> Maybe TimeZone -> TimeZone -> SourcePos -> CsvRules -> CsvRecord -> Transaction
transactionFromCsvRecord timesarezoned mtzin tzout sourcepos rules record = t
where
----------------------------------------------------------------------
-- 1. Define some helpers:
rule = csvRule rules :: DirectiveName -> Maybe FieldTemplate
-- ruleval = csvRuleValue rules record :: DirectiveName -> Maybe String
field = hledgerField rules record :: HledgerFieldName -> Maybe FieldTemplate
fieldval = hledgerFieldValue rules record :: HledgerFieldName -> Maybe Text
mdateformat = rule "date-format"
parsedate = parseDateWithCustomOrDefaultFormats timesarezoned mtzin tzout mdateformat
mkdateerror datefield datevalue mdateformat' = T.unpack $ T.unlines
["error: could not parse \""<>datevalue<>"\" as a date using date format "
<>maybe "\"YYYY/M/D\", \"YYYY-M-D\" or \"YYYY.M.D\"" (T.pack . show) mdateformat'
,showRecord record
,"the "<>datefield<>" rule is: "<>(fromMaybe "required, but missing" $ field datefield)
,"the date-format is: "<>fromMaybe "unspecified" mdateformat'
,"you may need to "
<>"change your "<>datefield<>" rule, "
<>maybe "add a" (const "change your") mdateformat'<>" date-format rule, "
<>"or "<>maybe "add a" (const "change your") mskip<>" skip rule"
,"for m/d/y or d/m/y dates, use date-format %-m/%-d/%Y or date-format %-d/%-m/%Y"
]
where
mskip = rule "skip"
----------------------------------------------------------------------
-- 2. Gather values needed for the transaction itself, by evaluating the
-- field assignment rules using the CSV record's data, and parsing a bit
-- more where needed (dates, status).
date = fromMaybe "" $ fieldval "date"
-- PARTIAL:
date' = fromMaybe (error' $ mkdateerror "date" date mdateformat) $ parsedate date
mdate2 = fieldval "date2"
mdate2' = (maybe (error' $ mkdateerror "date2" (fromMaybe "" mdate2) mdateformat) Just . parsedate) =<< mdate2
status =
case fieldval "status" of
Nothing -> Unmarked
Just s -> either statuserror id $ runParser (statusp <* eof) "" s
where
statuserror err = error' . T.unpack $ T.unlines
["error: could not parse \""<>s<>"\" as a cleared status (should be *, ! or empty)"
,"the parse error is: "<>T.pack (customErrorBundlePretty err)
]
code = maybe "" singleline' $ fieldval "code"
description = maybe "" singleline' $ fieldval "description"
comment = maybe "" unescapeNewlines $ fieldval "comment"
ttags = fromRight [] $ rtp commenttagsp comment
precomment = maybe "" unescapeNewlines $ fieldval "precomment"
singleline' = T.unwords . filter (not . T.null) . map T.strip . T.lines
unescapeNewlines = T.intercalate "\n" . T.splitOn "\\n"
----------------------------------------------------------------------
-- 3. Generate the postings for which an account has been assigned
-- (possibly indirectly due to an amount or balance assignment)
p1IsVirtual = (accountNamePostingType <$> fieldval "account1") == Just VirtualPosting
ps = [p | n <- [1..maxpostings]
,let cmt = maybe "" unescapeNewlines $ fieldval ("comment"<> T.pack (show n))
,let ptags = fromRight [] $ rtp commenttagsp cmt
,let currency = fromMaybe "" (fieldval ("currency"<> T.pack (show n)) <|> fieldval "currency")
,let mamount = getAmount rules record currency p1IsVirtual n
,let mbalance = getBalance rules record currency n
,Just (acct,isfinal) <- [getAccount rules record mamount mbalance n] -- skips Nothings
,let acct' | not isfinal && acct==unknownExpenseAccount &&
fromMaybe False (mamount >>= isNegativeMixedAmount) = unknownIncomeAccount
| otherwise = acct
,let p = nullposting{paccount = accountNameWithoutPostingType acct'
,pamount = fromMaybe missingmixedamt mamount
,ptransaction = Just t
,pbalanceassertion = mkBalanceAssertion rules record <$> mbalance
,pcomment = cmt
,ptags = ptags
,ptype = accountNamePostingType acct
}
]
----------------------------------------------------------------------
-- 4. Build the transaction (and name it, so the postings can reference it).
t = nulltransaction{
tsourcepos = (sourcepos, sourcepos) -- the CSV line number
,tdate = date'
,tdate2 = mdate2'
,tstatus = status
,tcode = code
,tdescription = description
,tcomment = comment
,ttags = ttags
,tprecedingcomment = precomment
,tpostings = ps
}
-- | Parse the date string using the specified date-format, or if unspecified
-- the "simple date" formats (YYYY/MM/DD, YYYY-MM-DD, YYYY.MM.DD, leading
-- zeroes optional). If a timezone is provided, we assume the DateFormat
-- produces a zoned time and we localise that to the given timezone.
parseDateWithCustomOrDefaultFormats :: Bool -> Maybe TimeZone -> TimeZone -> Maybe DateFormat -> Text -> Maybe Day
parseDateWithCustomOrDefaultFormats timesarezoned mtzin tzout mformat s = localdate <$> mutctime
-- this time code can probably be simpler, I'm just happy to get out alive
where
localdate :: UTCTime -> Day =
localDay .
dbg7 ("time in output timezone "++show tzout) .
utcToLocalTime tzout
mutctime :: Maybe UTCTime = asum $ map parseWithFormat formats
parseWithFormat :: String -> Maybe UTCTime
parseWithFormat fmt =
if timesarezoned
then
dbg7 "zoned CSV time, expressed as UTC" $
parseTimeM True defaultTimeLocale fmt $ T.unpack s :: Maybe UTCTime
else
-- parse as a local day and time; then if an input timezone is provided,
-- assume it's in that, otherwise assume it's in the output timezone;
-- then convert to UTC like the above
let
mlocaltime =
fmap (dbg7 "unzoned CSV time") $
parseTimeM True defaultTimeLocale fmt $ T.unpack s :: Maybe LocalTime
localTimeAsZonedTime tz lt = ZonedTime lt tz
in
case mtzin of
Just tzin ->
(dbg7 ("unzoned CSV time, declared as "++show tzin++ ", expressed as UTC") .
localTimeToUTC tzin)
<$> mlocaltime
Nothing ->
(dbg7 ("unzoned CSV time, treated as "++show tzout++ ", expressed as UTC") .
zonedTimeToUTC .
localTimeAsZonedTime tzout)
<$> mlocaltime
formats = map T.unpack $ maybe
["%Y/%-m/%-d"
,"%Y-%-m-%-d"
,"%Y.%-m.%-d"
-- ,"%-m/%-d/%Y"
-- ,parseTimeM TruedefaultTimeLocale "%Y/%m/%e" (take 5 s ++ "0" ++ drop 5 s)
-- ,parseTimeM TruedefaultTimeLocale "%Y-%m-%e" (take 5 s ++ "0" ++ drop 5 s)
-- ,parseTimeM TruedefaultTimeLocale "%m/%e/%Y" ('0':s)
-- ,parseTimeM TruedefaultTimeLocale "%m-%e-%Y" ('0':s)
]
(:[])
mformat
-- | Figure out the amount specified for posting N, if any.
-- A currency symbol to prepend to the amount, if any, is provided,
-- and whether posting 1 requires balancing or not.
-- This looks for a non-empty amount value assigned to "amountN", "amountN-in", or "amountN-out".
-- For postings 1 or 2 it also looks at "amount", "amount-in", "amount-out".
-- If more than one of these has a value, it looks for one that is non-zero.
-- If there's multiple non-zeros, or no non-zeros but multiple zeros, it throws an error.
getAmount :: CsvRules -> CsvRecord -> Text -> Bool -> Int -> Maybe MixedAmount
getAmount rules record currency p1IsVirtual n =
-- Warning! Many tricky corner cases here.
-- Keep synced with:
-- hledger_csv.m4.md -> CSV FORMAT -> "amount", "Setting amounts",
-- hledger/test/csv.test -> 13, 31-34
let
unnumberedfieldnames = ["amount","amount-in","amount-out"]
-- amount field names which can affect this posting
fieldnames = map (("amount"<> T.pack (show n))<>) ["","-in","-out"]
-- For posting 1, also recognise the old amount/amount-in/amount-out names.
-- For posting 2, the same but only if posting 1 needs balancing.
++ if n==1 || n==2 && not p1IsVirtual then unnumberedfieldnames else []
-- assignments to any of these field names with non-empty values
assignments = [(f,a') | f <- fieldnames
, Just v <- [T.strip . renderTemplate rules record f <$> hledgerField rules record f]
, not $ T.null v
-- XXX maybe ignore rule-generated values like "", "-", "$", "-$", "$-" ? cf CSV FORMAT -> "amount", "Setting amounts",
, let a = parseAmount rules record currency v
-- With amount/amount-in/amount-out, in posting 2,
-- flip the sign and convert to cost, as they did before 1.17
, let a' = if f `elem` unnumberedfieldnames && n==2 then mixedAmountCost (maNegate a) else a
]
-- if any of the numbered field names are present, discard all the unnumbered ones
discardUnnumbered xs = if null numbered then xs else numbered
where
numbered = filter (T.any isDigit . fst) xs
-- discard all zero amounts, unless all amounts are zero, in which case discard all but the first
discardExcessZeros xs = if null nonzeros then take 1 xs else nonzeros
where
nonzeros = filter (not . mixedAmountLooksZero . snd) xs
-- for -out fields, flip the sign XXX unless it's already negative ? back compat issues / too confusing ?
negateIfOut f = if "-out" `T.isSuffixOf` f then maNegate else id
in case discardExcessZeros $ discardUnnumbered assignments of
[] -> Nothing
[(f,a)] -> Just $ negateIfOut f a
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["in CSV rules:"
,"While processing " <> showRecord record
,"while calculating amount for posting " <> T.pack (show n)
] ++
["rule \"" <> f <> " " <>
fromMaybe "" (hledgerField rules record f) <>
"\" assigned value \"" <> wbToText (showMixedAmountB defaultFmt a) <> "\"" -- XXX not sure this is showing all the right info
| (f,a) <- fs
] ++
[""
,"Multiple non-zero amounts were assigned for an amount field."
,"Please ensure just one non-zero amount is assigned, perhaps with an if rule."
,"See also: https://hledger.org/hledger.html#setting-amounts"
,"(hledger manual -> CSV format -> Tips -> Setting amounts)"
]
-- | Figure out the expected balance (assertion or assignment) specified for posting N,
-- if any (and its parse position).
getBalance :: CsvRules -> CsvRecord -> Text -> Int -> Maybe (Amount, SourcePos)
getBalance rules record currency n = do
v <- (fieldval ("balance"<> T.pack (show n))
-- for posting 1, also recognise the old field name
<|> if n==1 then fieldval "balance" else Nothing)
case v of
"" -> Nothing
s -> Just (
parseBalanceAmount rules record currency n s
,initialPos "" -- parse position to show when assertion fails,
) -- XXX the csv record's line number would be good
where
fieldval = fmap T.strip . hledgerFieldValue rules record :: HledgerFieldName -> Maybe Text
-- | Given a non-empty amount string (from CSV) to parse, along with a
-- possibly non-empty currency symbol to prepend,
-- parse as a hledger MixedAmount (as in journal format), or raise an error.
-- The whole CSV record is provided for the error message.
parseAmount :: CsvRules -> CsvRecord -> Text -> Text -> MixedAmount
parseAmount rules record currency s =
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runParser (evalStateT (amountp <* eof) journalparsestate) "" $
currency <> simplifySign s
where
journalparsestate = nulljournal{jparsedecimalmark=parseDecimalMark rules}
mkerror e = error' . T.unpack $ T.unlines
["error: could not parse \"" <> s <> "\" as an amount"
,showRecord record
,showRules rules record
-- ,"the default-currency is: "++fromMaybe "unspecified" (getDirective "default-currency" rules)
,"the parse error is: " <> T.pack (customErrorBundlePretty e)
,"you may need to \
\change your amount*, balance*, or currency* rules, \
\or add or change your skip rule"
]
-- | Show the values assigned to each journal field.
showRules rules record = T.unlines $ catMaybes
[ (("the "<>fld<>" rule is: ")<>) <$>
getEffectiveAssignment rules record fld | fld <- journalfieldnames ]
-- | Show a (approximate) recreation of the original CSV record.
showRecord :: CsvRecord -> Text
showRecord r = "CSV record: "<>T.intercalate "," (map (wrap "\"" "\"") r)
-- XXX unify these ^v
-- | Almost but not quite the same as parseAmount.
-- Given a non-empty amount string (from CSV) to parse, along with a
-- possibly non-empty currency symbol to prepend,
-- parse as a hledger Amount (as in journal format), or raise an error.
-- The CSV record and the field's numeric suffix are provided for the error message.
parseBalanceAmount :: CsvRules -> CsvRecord -> Text -> Int -> Text -> Amount
parseBalanceAmount rules record currency n s =
either (mkerror n s) id $
runParser (evalStateT (amountp <* eof) journalparsestate) "" $
currency <> simplifySign s
-- the csv record's line number would be good
where
journalparsestate = nulljournal{jparsedecimalmark=parseDecimalMark rules}
mkerror n' s' e = error' . T.unpack $ T.unlines
["error: could not parse \"" <> s' <> "\" as balance"<> T.pack (show n') <> " amount"
,showRecord record
,showRules rules record
-- ,"the default-currency is: "++fromMaybe "unspecified" mdefaultcurrency
,"the parse error is: "<> T.pack (customErrorBundlePretty e)
]
-- Read a valid decimal mark from the decimal-mark rule, if any.
-- If the rule is present with an invalid argument, raise an error.
parseDecimalMark :: CsvRules -> Maybe DecimalMark
parseDecimalMark rules = do
s <- rules `csvRule` "decimal-mark"
case T.uncons s of
Just (c, rest) | T.null rest && isDecimalMark c -> return c
_ -> error' . T.unpack $ "decimal-mark's argument should be \".\" or \",\" (not \""<>s<>"\")"
-- | Make a balance assertion for the given amount, with the given parse
-- position (to be shown in assertion failures), with the assertion type
-- possibly set by a balance-type rule.
-- The CSV rules and current record are also provided, to be shown in case
-- balance-type's argument is bad (XXX refactor).
mkBalanceAssertion :: CsvRules -> CsvRecord -> (Amount, SourcePos) -> BalanceAssertion
mkBalanceAssertion rules record (amt, pos) = assrt{baamount=amt, baposition=pos}
where
assrt =
case getDirective "balance-type" rules of
Nothing -> nullassertion
Just x ->
case parseBalanceAssertionType $ T.unpack x of
Just (total, inclusive) -> nullassertion{batotal=total, bainclusive=inclusive}
Nothing -> error' . T.unpack $ T.unlines -- PARTIAL:
[ "balance-type \"" <> x <>"\" is invalid. Use =, ==, =* or ==*."
, showRecord record
, showRules rules record
]
-- | Detect from a balance assertion's syntax (=, ==, =*, ==*)
-- whether it is (a) total (multi-commodity) and (b) subaccount-inclusive.
-- Returns nothing if invalid syntax was provided.
parseBalanceAssertionType :: String -> Maybe (Bool, Bool)
parseBalanceAssertionType = \case
"=" -> Just (False, False)
"==" -> Just (True, False)
"=*" -> Just (False, True )
"==*" -> Just (True, True )
_ -> Nothing
-- | Figure out the account name specified for posting N, if any.
-- And whether it is the default unknown account (which may be
-- improved later) or an explicitly set account (which may not).
getAccount :: CsvRules -> CsvRecord -> Maybe MixedAmount -> Maybe (Amount, SourcePos) -> Int -> Maybe (AccountName, Bool)
getAccount rules record mamount mbalance n =
let
fieldval = hledgerFieldValue rules record :: HledgerFieldName -> Maybe Text
maccount = T.strip <$> fieldval ("account"<> T.pack (show n))
in case maccount of
-- accountN is set to the empty string - no posting will be generated
Just "" -> Nothing
-- accountN is set (possibly to "expenses:unknown"! #1192) - mark it final
Just a ->
-- Check it and reject if invalid.. sometimes people try
-- to set an amount or comment along with the account name.
case parsewith (accountnamep >> eof) a of
Left e -> usageError $ errorBundlePretty e
Right _ -> Just (a, True)
-- accountN is unset
Nothing ->
case (mamount, mbalance) of
-- amountN is set, or implied by balanceN - set accountN to
-- the default unknown account ("expenses:unknown") and
-- allow it to be improved later
(Just _, _) -> Just (unknownExpenseAccount, False)
(_, Just _) -> Just (unknownExpenseAccount, False)
-- amountN is also unset - no posting will be generated
(Nothing, Nothing) -> Nothing
-- | Default account names to use when needed.
unknownExpenseAccount = "expenses:unknown"
unknownIncomeAccount = "income:unknown"
type CsvAmountString = Text
-- | Canonicalise the sign in a CSV amount string.
-- Such strings can have a minus sign, parentheses (equivalent to minus),
-- or any two of these (which cancel out),
-- or a plus sign (which is removed),
-- or any sign by itself with no following number (which is removed).
-- See hledger > CSV FORMAT > Tips > Setting amounts.
--
-- These are supported (note, not every possibile combination):
--
-- >>> simplifySign "1"
-- "1"
-- >>> simplifySign "+1"
-- "1"
-- >>> simplifySign "-1"
-- "-1"
-- >>> simplifySign "(1)"
-- "-1"
-- >>> simplifySign "--1"
-- "1"
-- >>> simplifySign "-(1)"
-- "1"
-- >>> simplifySign "-+1"
-- "-1"
-- >>> simplifySign "(-1)"
-- "1"
-- >>> simplifySign "((1))"
-- "1"
-- >>> simplifySign "-"
-- ""
-- >>> simplifySign "()"
-- ""
-- >>> simplifySign "+"
-- ""
simplifySign :: CsvAmountString -> CsvAmountString
simplifySign amtstr
| Just (' ',t) <- T.uncons amtstr = simplifySign t
| Just (t,' ') <- T.unsnoc amtstr = simplifySign t
| Just ('(',t) <- T.uncons amtstr, Just (amt,')') <- T.unsnoc t = simplifySign $ negateStr amt
| Just ('-',b) <- T.uncons amtstr, Just ('(',t) <- T.uncons b, Just (amt,')') <- T.unsnoc t = simplifySign amt
| Just ('-',m) <- T.uncons amtstr, Just ('-',amt) <- T.uncons m = amt
| Just ('-',m) <- T.uncons amtstr, Just ('+',amt) <- T.uncons m = negateStr amt
| amtstr `elem` ["-","+","()"] = ""
| Just ('+',amt) <- T.uncons amtstr = simplifySign amt
| otherwise = amtstr
negateStr :: Text -> Text
negateStr amtstr = case T.uncons amtstr of
Just ('-',s) -> s
_ -> T.cons '-' amtstr
--- ** tests
_TESTS__________________________________________ = undefined
tests_RulesReader = testGroup "RulesReader" [
testGroup "parseCsvRules" [
testCase "empty file" $
parseCsvRules "unknown" "" @?= Right (mkrules defrules)
]
,testGroup "rulesp" [
testCase "trailing comments" $
parseWithState' defrules rulesp "skip\n# \n#\n" @?= Right (mkrules $ defrules{rdirectives = [("skip","")]})
,testCase "trailing blank lines" $
parseWithState' defrules rulesp "skip\n\n \n" @?= (Right (mkrules $ defrules{rdirectives = [("skip","")]}))
,testCase "no final newline" $
parseWithState' defrules rulesp "skip" @?= (Right (mkrules $ defrules{rdirectives=[("skip","")]}))
,testCase "assignment with empty value" $
parseWithState' defrules rulesp "account1 \nif foo\n account2 foo\n" @?=
(Right (mkrules $ defrules{rassignments = [("account1","")], rconditionalblocks = [CB{cbMatchers=[RecordMatcher None (toRegex' "foo")],cbAssignments=[("account2","foo")]}]}))
]
,testGroup "conditionalblockp" [
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parseWithState' defrules conditionalblockp "if a\n account2 b\n \n" @?=
(Right $ CB{cbMatchers=[RecordMatcher None $ toRegexCI' "a"],cbAssignments=[("account2","b")]})
],
testGroup "csvfieldreferencep" [
testCase "number" $ parseWithState' defrules csvfieldreferencep "%1" @?= (Right "%1")
,testCase "name" $ parseWithState' defrules csvfieldreferencep "%date" @?= (Right "%date")
,testCase "quoted name" $ parseWithState' defrules csvfieldreferencep "%\"csv date\"" @?= (Right "%\"csv date\"")
]
,testGroup "matcherp" [
testCase "recordmatcherp" $
parseWithState' defrules matcherp "A A\n" @?= (Right $ RecordMatcher None $ toRegexCI' "A A")
,testCase "recordmatcherp.starts-with-&" $
parseWithState' defrules matcherp "& A A\n" @?= (Right $ RecordMatcher And $ toRegexCI' "A A")
,testCase "fieldmatcherp.starts-with-%" $
parseWithState' defrules matcherp "description A A\n" @?= (Right $ RecordMatcher None $ toRegexCI' "description A A")
,testCase "fieldmatcherp" $
parseWithState' defrules matcherp "%description A A\n" @?= (Right $ FieldMatcher None "%description" $ toRegexCI' "A A")
,testCase "fieldmatcherp.starts-with-&" $
parseWithState' defrules matcherp "& %description A A\n" @?= (Right $ FieldMatcher And "%description" $ toRegexCI' "A A")
-- ,testCase "fieldmatcherp with operator" $
-- parseWithState' defrules matcherp "%description ~ A A\n" @?= (Right $ FieldMatcher "%description" "A A")
]
,testGroup "getEffectiveAssignment" [
let rules = mkrules $ defrules {rcsvfieldindexes=[("csvdate",1)],rassignments=[("date","%csvdate")]}
in testCase "toplevel" $ getEffectiveAssignment rules ["a","b"] "date" @?= (Just "%csvdate")
,let rules = mkrules $ defrules{rcsvfieldindexes=[("csvdate",1)], rconditionalblocks=[CB [FieldMatcher None "%csvdate" $ toRegex' "a"] [("date","%csvdate")]]}
in testCase "conditional" $ getEffectiveAssignment rules ["a","b"] "date" @?= (Just "%csvdate")
,let rules = mkrules $ defrules{rcsvfieldindexes=[("csvdate",1)], rconditionalblocks=[CB [FieldMatcher Not "%csvdate" $ toRegex' "a"] [("date","%csvdate")]]}
in testCase "negated-conditional-false" $ getEffectiveAssignment rules ["a","b"] "date" @?= (Nothing)
,let rules = mkrules $ defrules{rcsvfieldindexes=[("csvdate",1)], rconditionalblocks=[CB [FieldMatcher Not "%csvdate" $ toRegex' "b"] [("date","%csvdate")]]}
in testCase "negated-conditional-true" $ getEffectiveAssignment rules ["a","b"] "date" @?= (Just "%csvdate")
,let rules = mkrules $ defrules{rcsvfieldindexes=[("csvdate",1),("description",2)], rconditionalblocks=[CB [FieldMatcher None "%csvdate" $ toRegex' "a", FieldMatcher None "%description" $ toRegex' "b"] [("date","%csvdate")]]}
in testCase "conditional-with-or-a" $ getEffectiveAssignment rules ["a"] "date" @?= (Just "%csvdate")
,let rules = mkrules $ defrules{rcsvfieldindexes=[("csvdate",1),("description",2)], rconditionalblocks=[CB [FieldMatcher None "%csvdate" $ toRegex' "a", FieldMatcher None "%description" $ toRegex' "b"] [("date","%csvdate")]]}
in testCase "conditional-with-or-b" $ getEffectiveAssignment rules ["_", "b"] "date" @?= (Just "%csvdate")
,let rules = mkrules $ defrules{rcsvfieldindexes=[("csvdate",1),("description",2)], rconditionalblocks=[CB [FieldMatcher None "%csvdate" $ toRegex' "a", FieldMatcher And "%description" $ toRegex' "b"] [("date","%csvdate")]]}
in testCase "conditional.with-and" $ getEffectiveAssignment rules ["a", "b"] "date" @?= (Just "%csvdate")
,let rules = mkrules $ defrules{rcsvfieldindexes=[("csvdate",1),("description",2)], rconditionalblocks=[CB [FieldMatcher None "%csvdate" $ toRegex' "a", FieldMatcher And "%description" $ toRegex' "b", FieldMatcher None "%description" $ toRegex' "c"] [("date","%csvdate")]]}
in testCase "conditional.with-and-or" $ getEffectiveAssignment rules ["_", "c"] "date" @?= (Just "%csvdate")
]
]
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