{-# LANGUAGE Arrows, NoMonomorphismRestriction #-}
import ShadowLibrary.Core

import Text.XML.HXT.Core
import Text.XML.HXT.XPath
-- import Text.XML.HXT.Curl
import Data.List
import Data.List.Utils (replace)

import Text.Regex.Posix
import Text.Printf


extractRecords = extractLinksWithText "//section[@class='widget widget_zzm_gm_archive']//a"  -- pary adres-tytuł
	>>> first (arr $ replace "https" "http")
	>>> first (extractLinksWithText "//article//h2//a")
	>>> first (arr $  first (arr $ replace "https" "http"))
	>>> first (arr $  second (arr $ replace "ń" "n"))
	>>> first (arr $  second (arr $ replace "ś" "s"))
	>>> first (arr $  second (arr $ replace "ź" "z"))
	>>> first (arr $  second (arr $ replace "ł" "l"))
	>>> first (first (extractLinksWithText "//h1[@class='entry-title']//a[contains(@href,'.pdf')]"))
	>>> first (arr $  first (arr $ second(arr $ replace "ń" "n")))
	>>> first (arr $  first (arr $ second(arr $ replace "ś" "s")))
	>>> first (arr $  first (arr $ second(arr $ replace "ź" "z")))
	>>> first (arr $  first (arr $ second(arr $ replace "ł" "l")))
                 
-- ... a tutaj te trójki przerabiamy do docelowej struktury ShadowItem


toShadowItem :: (((String, String), String), String) -> ShadowItem
toShadowItem (((url, articleTitle), articleDatePart), year) =
  (defaultShadowItem url title) {
    originalDate = getDate articleDatePart,
    itype = "periodical",
    format = Just "pdf",
    finalUrl = url
    }
  where title = articleTitle

getDate :: String -> Maybe String
getDate url =
  case url =~~ ("[0-9]* ?[a-zA-Z]+ [0-9]{4}" :: String) of
  Just year -> Just year
  otherwise -> Nothing


main = do
    let start = "http://zzm.org.pl/glos-maszynisty/"
    let shadowLibrary = ShadowLibrary {logoUrl=Nothing,
                                       lname="Głos Maszynisty",
                                       abbrev="GloMasz",
                                       lLevel=0,
                                       webpage=start}
    extractItemsStartingFromUrl shadowLibrary start (extractRecords >>> arr toShadowItem)