MediaWiki/API/Query/Links/Import.hs

module MediaWiki.API.Query.Links.Import where

import MediaWiki.API.Types
import MediaWiki.API.Utils
import MediaWiki.API.Query.Links

import Text.XML.Light.Types

import Control.Monad
import Data.Maybe

stringXml :: String -> Either (String,[{-Error msg-}String]) LinksResponse
stringXml s = parseDoc xml s

xml :: Element -> Maybe LinksResponse
xml e = do
 guard (elName e == nsName "api")
 let es1 = children e
 p <- pNode "query" es1
 let es = children p
 ps <- fmap (mapMaybe xmlPage) (fmap children $ pNode "pages" es)
 let cont = pNode "query-continue" es1 >>= xmlContinue "langlinks" "llcontinue"
 return emptyLinksResponse
 { plPages = ps
	 , plContinue = cont
	 }

xmlPage :: Element -> Maybe (PageTitle,[PageTitle])
xmlPage e = do
 guard (elName e == nsName "page")
 let pid = fmap read $ pAttr "pageid" e
 let ns = fromMaybe mainNamespace $ pAttr "ns" e
 let tit = fromMaybe "" $ pAttr "title" e
 let es = children e
 ls <- fmap (mapMaybe xmlPageLink) (fmap children $ pNode "links" es)
 let pg = emptyPageTitle{pgNS=ns,pgMbId=pid,pgTitle=tit}
 return (pg,ls)

xmlPageLink :: Element -> Maybe PageTitle
xmlPageLink e = do
 guard (elName e == nsName "pl")
 let ns = fromMaybe mainNamespace $ pAttr "ns" e
 let tit = fromMaybe "" $ pAttr "title" e
 let pid = pAttr "pageid" e
 return emptyPageTitle{pgNS=ns,pgTitle=tit,pgMbId=pid}