386 lines
13 KiB
Haskell
386 lines
13 KiB
Haskell
{-|
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Convert account data in CSV format (eg downloaded from a bank) to ledger
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format, and print it on stdout. See the manual for more details.
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-}
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module Hledger.Cli.Commands.Convert where
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import Hledger.Cli.Options (Opt(Debug))
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import Hledger.Cli.Version (versionstr)
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import Hledger.Data.Types (Ledger,AccountName,Transaction(..),Posting(..),PostingType(..))
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import Hledger.Data.Utils (strip, spacenonewline, restofline, parseWithCtx, assertParse, assertParseEqual)
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import Hledger.Data.Parse (someamount, emptyCtx, ledgeraccountname)
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import Hledger.Data.Amount (nullmixedamt)
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import Safe (atDef, maximumDef)
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import System.IO (stderr)
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import Text.CSV (parseCSVFromFile, printCSV)
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import Text.Printf (hPrintf)
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import Text.RegexPR (matchRegexPR, gsubRegexPR)
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import Data.Maybe
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import Hledger.Data.Dates (firstJust, showDate, parsedate)
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import System.Locale (defaultTimeLocale)
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import Data.Time.Format (parseTime)
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import Control.Monad (when, guard, liftM)
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import Safe (readDef, readMay)
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import System.Directory (doesFileExist)
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import System.Exit (exitFailure)
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import System.FilePath.Posix (takeBaseName, replaceExtension)
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import Text.ParserCombinators.Parsec
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import Test.HUnit
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{- |
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A set of data definitions and account-matching patterns sufficient to
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convert a particular CSV data file into meaningful ledger transactions. See above.
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-}
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data CsvRules = CsvRules {
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dateField :: Maybe FieldPosition,
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statusField :: Maybe FieldPosition,
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codeField :: Maybe FieldPosition,
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descriptionField :: Maybe FieldPosition,
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amountField :: Maybe FieldPosition,
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currencyField :: Maybe FieldPosition,
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baseCurrency :: Maybe String,
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baseAccount :: AccountName,
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accountRules :: [AccountRule]
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} deriving (Show, Eq)
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nullrules = CsvRules {
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dateField=Nothing,
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statusField=Nothing,
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codeField=Nothing,
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descriptionField=Nothing,
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amountField=Nothing,
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currencyField=Nothing,
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baseCurrency=Nothing,
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baseAccount="unknown",
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accountRules=[]
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}
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type FieldPosition = Int
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type AccountRule = (
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[(String, Maybe String)] -- list of regex match patterns with optional replacements
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,AccountName -- account name to use for a transaction matching this rule
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)
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type CsvRecord = [String]
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-- | Read the CSV file named as an argument and print equivalent ledger transactions,
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-- using/creating a .rules file.
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convert :: [Opt] -> [String] -> Ledger -> IO ()
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convert opts args _ = do
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when (null args) $ error "please specify a csv data file."
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let csvfile = head args
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csvparse <- parseCSVFromFile csvfile
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let records = case csvparse of
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Left e -> error $ show e
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Right rs -> reverse $ filter (/= [""]) rs
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let debug = Debug `elem` opts
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rulesfile = rulesFileFor csvfile
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exists <- doesFileExist rulesfile
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if (not exists) then do
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hPrintf stderr "creating conversion rules file %s, edit this file for better results\n" rulesfile
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writeFile rulesfile initialRulesFileContent
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else
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hPrintf stderr "using conversion rules file %s\n" rulesfile
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rules <- liftM (either (error.show) id) $ parseCsvRulesFile rulesfile
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when debug $ hPrintf stderr "rules: %s\n" (show rules)
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let requiredfields = max 2 (maxFieldIndex rules + 1)
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badrecords = take 1 $ filter ((< requiredfields).length) records
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if null badrecords
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then mapM_ (printTxn debug rules) records
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else do
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hPrintf stderr (unlines [
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"Warning, at least one CSV record does not contain a field referenced by the"
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,"conversion rules file, or has less than two fields. Are you converting a"
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,"valid CSV file ? First bad record:\n%s"
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]) (show $ head badrecords)
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exitFailure
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-- | The highest (0-based) field index referenced in the field
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-- definitions, or -1 if no fields are defined.
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maxFieldIndex :: CsvRules -> Int
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maxFieldIndex r = maximumDef (-1) $ catMaybes [
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dateField r
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,statusField r
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,codeField r
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,descriptionField r
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,amountField r
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,currencyField r
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]
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rulesFileFor :: FilePath -> FilePath
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rulesFileFor csvfile = replaceExtension csvfile ".rules"
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initialRulesFileContent :: String
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initialRulesFileContent =
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"# csv conversion rules file generated by hledger "++versionstr++"\n" ++
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"# Add rules to this file for more accurate conversion, see\n"++
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"# http://hledger.org/MANUAL.html#convert\n" ++
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"\n" ++
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"base-account assets:bank:checking\n" ++
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"date-field 0\n" ++
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"description-field 4\n" ++
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"amount-field 1\n" ++
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"currency $\n" ++
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"\n" ++
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"# account-assigning rules\n" ++
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"\n" ++
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"SPECTRUM\n" ++
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"expenses:health:gym\n" ++
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"\n" ++
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"ITUNES\n" ++
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"BLKBSTR=BLOCKBUSTER\n" ++
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"expenses:entertainment\n" ++
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"\n" ++
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"(TO|FROM) SAVINGS\n" ++
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"assets:bank:savings\n"
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-- rules file parser
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parseCsvRulesFile :: FilePath -> IO (Either ParseError CsvRules)
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parseCsvRulesFile f = do
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s <- readFile f
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return $ parseCsvRules f s
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parseCsvRules :: FilePath -> String -> Either ParseError CsvRules
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parseCsvRules rulesfile s = runParser csvrulesfile nullrules{baseAccount=takeBaseName rulesfile} rulesfile s
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csvrulesfile :: GenParser Char CsvRules CsvRules
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csvrulesfile = do
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many blankorcommentline
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many definitions
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r <- getState
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ars <- many accountrule
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many blankorcommentline
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eof
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return r{accountRules=ars}
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-- | Real independent parser choice, even when alternative matches share a prefix.
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choice' parsers = choice $ map try (init parsers) ++ [last parsers]
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definitions :: GenParser Char CsvRules ()
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definitions = do
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choice' [
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datefield
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,statusfield
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,codefield
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,descriptionfield
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,amountfield
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,currencyfield
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,basecurrency
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,baseaccount
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,commentline
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] <?> "definition"
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return ()
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datefield = do
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string "date-field"
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many1 spacenonewline
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v <- restofline
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r <- getState
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setState r{dateField=readMay v}
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codefield = do
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string "code-field"
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many1 spacenonewline
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v <- restofline
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r <- getState
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setState r{codeField=readMay v}
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statusfield = do
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string "status-field"
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many1 spacenonewline
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v <- restofline
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r <- getState
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setState r{statusField=readMay v}
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descriptionfield = do
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string "description-field"
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many1 spacenonewline
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v <- restofline
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r <- getState
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setState r{descriptionField=readMay v}
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amountfield = do
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string "amount-field"
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many1 spacenonewline
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v <- restofline
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r <- getState
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setState r{amountField=readMay v}
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currencyfield = do
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string "currency-field"
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many1 spacenonewline
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v <- restofline
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r <- getState
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setState r{currencyField=readMay v}
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basecurrency = do
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string "currency"
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many1 spacenonewline
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v <- restofline
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r <- getState
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setState r{baseCurrency=Just v}
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baseaccount = do
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string "base-account"
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many1 spacenonewline
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v <- ledgeraccountname
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optional newline
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r <- getState
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setState r{baseAccount=v}
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accountrule :: GenParser Char CsvRules AccountRule
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accountrule = do
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many blankorcommentline
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pats <- many1 matchreplacepattern
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guard $ length pats >= 2
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let pats' = init pats
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acct = either (fail.show) id $ runParser ledgeraccountname () "" $ fst $ last pats
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many blankorcommentline
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return (pats',acct)
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<?> "account rule"
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blanklines = many1 blankline >> return ()
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blankline = many spacenonewline >> newline >> return () <?> "blank line"
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commentchar = oneOf ";#"
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commentline = many spacenonewline >> commentchar >> restofline >> return () <?> "comment line"
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blankorcommentline = choice' [blankline, commentline]
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matchreplacepattern = do
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notFollowedBy commentchar
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matchpat <- many1 (noneOf "=\n")
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replpat <- optionMaybe $ do {char '='; many $ noneOf "\n"}
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newline
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return (matchpat,replpat)
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printTxn :: Bool -> CsvRules -> CsvRecord -> IO ()
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printTxn debug rules rec = do
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when debug $ hPrintf stderr "record: %s" (printCSV [rec])
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putStr $ show $ transactionFromCsvRecord rules rec
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-- csv record conversion
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transactionFromCsvRecord :: CsvRules -> CsvRecord -> Transaction
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transactionFromCsvRecord rules fields =
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let
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date = parsedate $ normaliseDate $ maybe "1900/1/1" (atDef "" fields) (dateField rules)
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status = maybe False (null . strip . (atDef "" fields)) (statusField rules)
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code = maybe "" (atDef "" fields) (codeField rules)
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desc = maybe "" (atDef "" fields) (descriptionField rules)
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comment = ""
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precomment = ""
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amountstr = maybe "" (atDef "" fields) (amountField rules)
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amountstr' = strnegate amountstr where strnegate ('-':s) = s
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strnegate s = '-':s
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currency = maybe (fromMaybe "" $ baseCurrency rules) (atDef "" fields) (currencyField rules)
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amountstr'' = currency ++ amountstr'
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amountparse = runParser someamount emptyCtx "" amountstr''
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amount = either (const nullmixedamt) id amountparse
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unknownacct | (readDef 0 amountstr' :: Double) < 0 = "income:unknown"
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| otherwise = "expenses:unknown"
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(acct,newdesc) = identify (accountRules rules) unknownacct desc
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t = Transaction {
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tdate=date,
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teffectivedate=Nothing,
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tstatus=status,
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tcode=code,
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tdescription=newdesc,
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tcomment=comment,
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tpreceding_comment_lines=precomment,
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tpostings=[
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Posting {
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pstatus=False,
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paccount=acct,
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pamount=amount,
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pcomment="",
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ptype=RegularPosting,
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ptransaction=Just t
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},
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Posting {
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pstatus=False,
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paccount=baseAccount rules,
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pamount=(-amount),
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pcomment="",
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ptype=RegularPosting,
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ptransaction=Just t
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}
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]
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}
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in t
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-- | Convert some date string with unknown format to YYYY/MM/DD.
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normaliseDate :: String -> String
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normaliseDate s = maybe "0000/00/00" showDate $
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firstJust
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[parseTime defaultTimeLocale "%Y/%m/%e" s
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-- can't parse a month without leading 0, try adding one
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,parseTime defaultTimeLocale "%Y/%m/%e" (take 5 s ++ "0" ++ drop 5 s)
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,parseTime defaultTimeLocale "%Y-%m-%e" s
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,parseTime defaultTimeLocale "%Y-%m-%e" (take 5 s ++ "0" ++ drop 5 s)
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,parseTime defaultTimeLocale "%m/%e/%Y" s
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,parseTime defaultTimeLocale "%m/%e/%Y" ('0':s)
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,parseTime defaultTimeLocale "%m-%e-%Y" s
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,parseTime defaultTimeLocale "%m-%e-%Y" ('0':s)
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]
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-- | Apply account matching rules to a transaction description to obtain
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-- the most appropriate account and a new description.
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identify :: [AccountRule] -> String -> String -> (String,String)
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identify rules defacct desc | null matchingrules = (defacct,desc)
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| otherwise = (acct,newdesc)
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where
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matchingrules = filter ismatch rules :: [AccountRule]
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where ismatch = any (isJust . flip matchRegexPR (caseinsensitive desc) . fst) . fst
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(prs,acct) = head matchingrules
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p_ms_r = filter (\(_,m,_) -> isJust m) $ map (\(p,r) -> (p, matchRegexPR (caseinsensitive p) desc, r)) prs
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(p,_,r) = head p_ms_r
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newdesc = case r of Just rpat -> gsubRegexPR (caseinsensitive p) rpat desc
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Nothing -> desc
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caseinsensitive = ("(?i)"++)
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tests_Convert = TestList [
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"convert rules parsing: empty file" ~: do
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-- let assertMixedAmountParse parseresult mixedamount =
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-- (either (const "parse error") showMixedAmountDebug parseresult) ~?= (showMixedAmountDebug mixedamount)
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assertParseEqual (parseCsvRules "unknown" "") nullrules
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,"convert rules parsing: accountrule" ~: do
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assertParseEqual (parseWithCtx nullrules accountrule "A\na\n") -- leading blank line required
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([("A",Nothing)], "a")
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,"convert rules parsing: trailing comments" ~: do
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assertParse (parseWithCtx nullrules csvrulesfile "A\na\n# \n#\n")
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,"convert rules parsing: trailing blank lines" ~: do
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assertParse (parseWithCtx nullrules csvrulesfile "A\na\n\n \n")
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-- not supported
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-- ,"convert rules parsing: no final newline" ~: do
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-- assertParse (parseWithCtx nullrules csvrulesfile "A\na")
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-- assertParse (parseWithCtx nullrules csvrulesfile "A\na\n# \n#")
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-- assertParse (parseWithCtx nullrules csvrulesfile "A\na\n\n ")
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-- (nullrules{
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-- -- dateField=Maybe FieldPosition,
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-- -- statusField=Maybe FieldPosition,
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-- -- codeField=Maybe FieldPosition,
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-- -- descriptionField=Maybe FieldPosition,
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-- -- amountField=Maybe FieldPosition,
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-- -- currencyField=Maybe FieldPosition,
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-- -- baseCurrency=Maybe String,
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-- -- baseAccount=AccountName,
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-- accountRules=[
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-- ([("A",Nothing)], "a")
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-- ]
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-- })
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] |