module Text.LDIF (
parseLDIFStr,
parseLDIFFile,
LDIF(..),
Record(..),
Change(..),
Modify(..),
DN, Attribute, Value, AttrValue
)
where
import Text.ParserCombinators.Parsec
import Data.Either
import Data.Char
type Attribute = String
type Value = String
type AttrValue = (Attribute, Value)
type DN = String
data LDIF = LDIFContent { lcVersion :: Maybe String, lcEntries :: [Record] }
| LDIFChanges { lcVersion :: Maybe String, lcEntries :: [Record] } deriving Show
data Record = AttrValRecord { recDN :: DN, recAttrVals :: [AttrValue] }
| ChangeRecord { recDN :: DN, recOp :: Change } deriving Show
data Change = ChangeAdd { chAttrVals :: [AttrValue] }
| ChangeDelete
| ChangeModify { chMods :: [Modify] }
| ChangeModDN deriving Show
data Modify = ModAdd { modAttr :: Attribute, modAttrVals :: [AttrValue] }
| ModDelete { modAttr :: Attribute, modAttrVals :: [AttrValue] }
| ModReplace { modAttr :: Attribute, modAttrVals :: [AttrValue] } deriving Show
parseLDIFStr :: String -> Either ParseError LDIF
parseLDIFStr = parse pLdif "(param)"
parseLDIFFile :: String -> IO (Either ParseError LDIF)
parseLDIFFile name = do
input <- readFile name
return $ parse pLdif name input
pLdif :: CharParser st LDIF
pLdif = try pLdifChanges <|> pLdifContent
pLdifChanges :: CharParser st LDIF
pLdifChanges = do
ver <- optionMaybe pVersionSpec
recs <- sepEndBy1 pChangeRec pSEPs
return $ LDIFChanges ver recs
pLdifContent :: CharParser st LDIF
pLdifContent = do
ver <- optionMaybe pVersionSpec
recs <- sepEndBy1 pAttrValRec pSEPs
return $ LDIFContent ver recs
pAttrValRec :: CharParser st Record
pAttrValRec = do
dn <- pDNSpec
pSEP
attrVals <- sepEndBy1 pAttrValSpec pSEP
return $ AttrValRecord dn attrVals
pChangeRec :: CharParser st Record
pChangeRec = try pChangeAdd
<|> try pChangeDel
<|> try pChangeMod
<|> pChangeModDN
pChangeAdd :: CharParser st Record
pChangeAdd = do
dn <- pDNSpec
pSEP
string "changetype:"
pFILL
string "add"
pSEP
vals <- sepEndBy1 pAttrValSpec pSEP
return $ ChangeRecord dn (ChangeAdd vals)
pChangeDel :: CharParser st Record
pChangeDel = do
dn <- pDNSpec
pSEP
string "changetype:"
pFILL
string "delete"
pSEP
return $ ChangeRecord dn ChangeDelete
pChangeMod :: CharParser st Record
pChangeMod = do
dn <- pDNSpec
pSEP
string "changetype:"
pFILL
string "modify"
pSEP
mods <- sepEndBy1 pModSpec (char '-' >> pSEP)
return $ ChangeRecord dn (ChangeModify mods)
pChangeModDN :: CharParser st Record
pChangeModDN = do
dn <- pDNSpec
pSEP
string "changetype:"
pFILL
string "modrdn"
pSEP
string "newrdn:"
pFILL
pRDN
pSEP
string "deleteoldrdn:"
pFILL
oneOf "01"
pSEP
return $ ChangeRecord dn ChangeModDN
pRDN :: CharParser st String
pRDN = pSafeString
pDNSpec :: CharParser st DN
pDNSpec = do
string "dn:"
pFILL
pSafeString
pVersionSpec :: CharParser st String
pVersionSpec = do
string "version:"
pFILL
many1 digit
pModSpec :: CharParser st Modify
pModSpec = do
modType <- pModType
pFILL
att <- pAttributeDescription
pSEP
vals <- sepEndBy pAttrValSpec pSEP
return $ mkMod modType att vals
mkMod :: String -> String -> [AttrValue] -> Modify
mkMod modType att vals | modType == "add:" = ModAdd att vals
| modType == "delete:" = ModDelete att vals
| modType == "replace:" = ModReplace att vals
| otherwise = error $ "unexpected mod:" ++ modType
pModType :: CharParser st String
pModType = try (string "add:")
<|> try (string "delete:")
<|> string "replace:"
pAttributeDescription :: CharParser st String
pAttributeDescription = pAttributeType
pAttributeType :: CharParser st String
pAttributeType = try pLdapOid
<|> (do { l <- letter; o <- pAttrTypeChars; return $ l:o } )
pAttrValSpec :: CharParser st AttrValue
pAttrValSpec = do
name <- pAttributeDescription
val <- pValueSpec
return (name, val)
pValueSpec :: CharParser st Value
pValueSpec = try (char ':' >> char ':' >> pFILL >> pBase64String)
<|> try (char ':' >> pFILL >> pSafeString)
<|> (char ':' >> char '<' >> pFILL >> pURL)
pURL :: CharParser st String
pURL = pSafeString
pSafeString :: CharParser st String
pSafeString = do
c <- noneOf "\n\r :<"
r <- many (noneOf "\n\r")
return $ c:r
pBase64String :: CharParser st String
pBase64String = pSafeString
pAttrTypeChars :: CharParser st String
pAttrTypeChars = many (satisfy (\x -> isAlphaNum x || x == '-'))
pLdapOid :: CharParser st String
pLdapOid = do
num <- many1 digit
rest <- many (do { string "."; n <- many1 digit; return $ '.':n})
return $ num ++ concat rest
pFILL :: CharParser st ()
pFILL = spaces
pSEP :: CharParser st ()
pSEP = try (char '\r' >> char '\n' >> return () )
<|> (char '\n' >> return () )
pSEPs :: CharParser st ()
pSEPs = many pSEP >> return ()