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refactor getPostings

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This commit is contained in:
Simon Michael 2009-04-16 05:33:51 +00:00
parent 86fab58e6a
commit 29d9aed845
1 changed files with 16 additions and 13 deletions
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29
AddCommand.hs
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@ -75,26 +75,29 @@ getTransaction l args = do
-- | Read two or more postings from the command line.
getPostings :: Maybe [Posting] -> [Posting] -> IO [Posting]
getPostings bestmatchps enteredps = do
account <- askFor (printf "account %d" n)
(maybe Nothing (Just . paccount) bestmatch)
(Just $ \s -> not $ null s && (length enteredps < 2))
account <- askFor (printf "account %d" n) defaultaccount validateaccount
if null account
then return enteredps
else do
amount <- liftM (fromparse . parse (someamount <|> return missingamt) "")
$ askFor (printf "amount %d" n)
(maybe Nothing (Just . show . pamount) bestmatch)
(Just $ \s -> (null s && (not $ null enteredps)) ||
(isRight $ parse (someamount>>many spacenonewline>>eof) "" s))
amountstr <- askFor (printf "amount %d" n) defaultamount validateamount
let amount = fromparse $ parse (someamount <|> return missingamt) "" amountstr
let p = nullrawposting{paccount=account,pamount=amount}
if amount == missingamt
then return $ enteredps ++ [p]
else getPostings bestmatchps $ enteredps ++ [p]
where n = length enteredps + 1
bestmatch | isNothing bestmatchps = Nothing
| n <= length ps = Just $ ps !! (n-1)
| otherwise = Nothing
where Just ps = bestmatchps
where
n = length enteredps + 1
bestmatch | isNothing bestmatchps = Nothing
| n <= length ps = Just $ ps !! (n-1)
| otherwise = Nothing
where Just ps = bestmatchps
defaultaccount = maybe Nothing (Just . paccount) bestmatch
validateaccount = Just $ \s -> not $ null s && (length enteredps < 2)
defaultamount = maybe Nothing (Just . show . pamount) bestmatch
validateamount = Just $ \s ->
(null s && (not $ null enteredps)) ||
(isRight $ parse (someamount>>many spacenonewline>>eof) "" s)
-- | Prompt and read a string value, possibly with a default and a validator.
-- A validator will cause the prompt to repeat until the input is valid.