hledger/Commands/Stats.hs
2009-06-03 16:49:43 +00:00

66 lines
2.7 KiB
Haskell

{-|
Print some statistics for the ledger.
-}
module Commands.Stats
where
import Prelude hiding (putStr)
import Ledger
import Options
import System.IO.UTF8
-- | Print various statistics for the ledger.
stats :: [Opt] -> [String] -> Ledger -> IO ()
stats opts args l = do
today <- getCurrentDay
putStr $ showStats opts args l today
showStats :: [Opt] -> [String] -> Ledger -> Day -> String
showStats _ _ l today =
heading ++ (unlines $ map (\(a,b) -> printf fmt a b) stats)
where
heading = underline $ printf "Ledger statistics as of %s" (show today)
fmt = "%-" ++ (show w1) ++ "s: %-" ++ (show w2) ++ "s"
w1 = maximum $ map (length . fst) stats
w2 = maximum $ map (length . show . snd) stats
stats = [
("File", filepath $ rawledger l)
,("Period", printf "%s to %s (%d days)" (start span) (end span) days)
,("Transactions", printf "%d (%0.1f per day)" tnum txnrate)
,("Transactions last 30 days", printf "%d (%0.1f per day)" tnum30 txnrate30)
,("Transactions last 7 days", printf "%d (%0.1f per day)" tnum7 txnrate7)
,("Last transaction", maybe "none" show lastdate ++
maybe "" (printf " (%d days ago)") lastelapsed)
-- ,("Payees/descriptions", show $ length $ nub $ map ltdescription ts)
,("Accounts", show $ length $ accounts l)
,("Commodities", show $ length $ commodities l)
-- Transactions this month : %(monthtxns)s (last month in the same period: %(lastmonthtxns)s)
-- Uncleared transactions : %(uncleared)s
-- Days since reconciliation : %(reconcileelapsed)s
-- Days since last transaction : %(recentelapsed)s
]
where
ts = sortBy (comparing ltdate) $ ledger_txns $ rawledger l
lastdate | null ts = Nothing
| otherwise = Just $ ltdate $ last ts
lastelapsed = maybe Nothing (Just . diffDays today) lastdate
tnum = length ts
span = rawdatespan l
start (DateSpan (Just d) _) = show d
start _ = ""
end (DateSpan _ (Just d)) = show d
end _ = ""
days = fromMaybe 0 $ daysInSpan span
txnrate | days==0 = 0
| otherwise = fromIntegral tnum / fromIntegral days :: Double
tnum30 = length $ filter withinlast30 ts
withinlast30 t = (d>=(addDays (-30) today) && (d<=today)) where d = ltdate t
txnrate30 = fromIntegral tnum30 / 30 :: Double
tnum7 = length $ filter withinlast7 ts
withinlast7 t = (d>=(addDays (-7) today) && (d<=today)) where d = ltdate t
txnrate7 = fromIntegral tnum7 / 7 :: Double