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module Text.Hakyll.Util
( trim
, split
, stripHTML
) where
import Data.Char (isSpace)
import Text.Regex (splitRegex, mkRegex)
-- | Trim a string (drop spaces and tabs at both sides).
trim :: String -> String
trim = reverse . trim' . reverse . trim'
where trim' = dropWhile isSpace
-- | Strip html tags.
stripHTML :: String -> String
stripHTML [] = []
stripHTML str = let (beforeTag, rest) = break (== '<') str
(_, afterTag) = break (== '>') rest
in beforeTag ++ (stripHTML $ tail' afterTag)
-- We need a failsafe tail function.
where tail' [] = []
tail' xs = tail xs
-- | Split a list at a certain element.
split :: String -> String -> [String]
split pattern = filter (not . null)
. splitRegex (mkRegex pattern)
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