68 lines
2.9 KiB
Haskell
Executable File
68 lines
2.9 KiB
Haskell
Executable File
{-# LANGUAGE OverloadedStrings #-}
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module Hledger.Data.JournalChecks.Uniqueleafnames (
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journalCheckUniqueleafnames
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)
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where
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import Data.Function (on)
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import Data.List (groupBy, sortBy)
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import Data.Text (Text)
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import qualified Data.Text as T
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import Text.Printf (printf)
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import Hledger.Data.AccountName (accountLeafName)
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import Hledger.Data.Errors (makePostingErrorExcerpt)
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import Hledger.Data.Journal (journalPostings, journalAccountNamesUsed)
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import Hledger.Data.Posting (isVirtual)
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import Hledger.Data.Types
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import Hledger.Utils (chomp, textChomp)
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-- | Check that all the journal's postings are to accounts with a unique leaf name.
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-- Otherwise, return an error message for the first offending posting.
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journalCheckUniqueleafnames :: Journal -> Either String ()
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journalCheckUniqueleafnames j = do
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-- find all duplicate leafnames, and the full account names they appear in
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case finddupes $ journalLeafAndFullAccountNames j of
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[] -> Right ()
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-- pick the first duplicated leafname and show the transactions of
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-- the first two postings using it, highlighting the second as the error.
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(leaf,fulls):_ ->
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case filter ((`elem` fulls).paccount) $ journalPostings j of
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ps@(p:p2:_) -> Left $ chomp $ printf
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("%s:%d:\n%s\nChecking for unique account leaf names is enabled, and\n"
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++"account leaf name %s is not unique.\n"
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++"It appears in these account names, which are used in %d places:\n%s"
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++"\nConsider changing these account names so their last parts are different."
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)
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f l ex (show leaf) (length ps) accts
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where
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-- t = fromMaybe nulltransaction ptransaction -- XXX sloppy
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(_,_,_,ex1) = makePostingErrorExcerpt p (\_ _ _ -> Nothing)
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(f,l,_,ex2) = makePostingErrorExcerpt p2 finderrcols
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-- separate the two excerpts by a space-beginning line to help flycheck-hledger parse them
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ex = T.unlines [textChomp ex1, T.pack " ...", textChomp ex2]
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finderrcols p' _ _ = Just (col, Just col2)
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where
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a = paccount p'
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alen = T.length a
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llen = T.length $ accountLeafName a
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col = 5 + (if isVirtual p' then 1 else 0) + alen - llen
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col2 = col + llen - 1
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accts = T.unlines fulls
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_ -> Right () -- shouldn't happen
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finddupes :: (Ord leaf, Eq full) => [(leaf, full)] -> [(leaf, [full])]
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finddupes leafandfullnames = zip dupLeafs dupAccountNames
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where dupLeafs = map (fst . head) d
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dupAccountNames = map (map snd) d
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d = dupes' leafandfullnames
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dupes' = filter ((> 1) . length)
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. groupBy ((==) `on` fst)
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. sortBy (compare `on` fst)
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journalLeafAndFullAccountNames :: Journal -> [(Text, AccountName)]
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journalLeafAndFullAccountNames = map leafAndAccountName . journalAccountNamesUsed
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where leafAndAccountName a = (accountLeafName a, a)
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