forked from filipg/twilight-library
91 lines
3.6 KiB
Haskell
91 lines
3.6 KiB
Haskell
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{-# LANGUAGE Arrows, NoMonomorphismRestriction #-}
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import ShadowLibrary.Core
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import Text.XML.HXT.Core
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import Text.XML.HXT.XPath
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-- import Text.XML.HXT.Curl
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import Data.List
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import Data.List.Utils (replace)
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import Text.Regex.Posix
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import Text.Printf
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import Data.Char (toLower)
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class Nothingish a where
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nada :: a
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instance Nothingish [a] where
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nada = []
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eliminate :: (Nothingish a) => Maybe a -> a
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eliminate (Just a) = a
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eliminate Nothing = nada
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toLowerString :: [Char] -> [Char]
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toLowerString str = [ toLower x | x <- str]
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mToString :: Maybe String -> String
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mToString n
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| n == Nothing = ""
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| otherwise = eliminate n
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extractMonth :: String -> String
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extractMonth n =
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case n =~~ ("[A-za-z]+" :: String) of
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Just month -> mToString (baseMonthNameToNumber (toLowerString month))
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otherwise -> ""
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mExtractYear :: String -> String
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mExtractYear n =
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case n =~~ ("(1[6789]|20)[0-9][0-9]" :: String) of
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Just year -> year
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otherwise -> ""
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changeDate :: String -> String
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changeDate a = mExtractYear a ++ "-" ++ extractMonth a
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extractRecords = extractLinksWithText "(//a[@class='magazine-list__year-item'])[last()]" -- pary adres-tytuł
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--extractRecords = extractLinksWithText "//a[@class='magazine-list__year-item']" -- pary adres-tytuł
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>>> second (arr $ replace "\r\n " "") -- czyścimy drugi element pary, czyli tytuł z niepotrzebnych białych znaków
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>>> second (arr $ replace " " "") -- czyścimy drugi element pary, czyli tytuł z niepotrzebnych białych znaków
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-- >>> first (arr ((++"tr") . init)) -- modyfikujemy pierwszy element pary, czyli adres URL
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>>> first (extractLinksWithText "//div[@class='magazine-list__item']/a") -- pobieramy stronę z adresu URL i wyciągamy linki z tej strony pasujące do wyrażenia XPathowego
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>>> first (second (arr $ replace "\r\n " ""))
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>>> first (first (
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extractLinksWithText "//div[@class='files__item']/a[contains(@href,'.pdf')]"
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>>> second (arr $ replace "\r\n " "")
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-- >>> first (arr $ replace "//" "/")
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)
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>>> second (arr $ changeDate)
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) -- pobieramy stronę z adresu URL i wyciągamy linki z tej strony pasujące do wyrażenia XPathowego
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-- ostatecznie wyjdą trójki ((adres URL, tytuł artykułu), tytuł rocznika)
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-- ... a tutaj te trójki przerabiamy do docelowej struktury ShadowItem
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toShadowItem :: (((String, String), String), String) -> ShadowItem
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toShadowItem (((url, chapterTitle), articleTitle), yearlyTitle) =
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(defaultShadowItem url title) {
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originalDate = Just date,
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itype = "periodical",
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format = Just "pdf",
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finalUrl = url
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}
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where title = "Elektronika Praktyczna " ++ (replace " " "" articleTitle)
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date = yearlyTitle
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getDate yearlyTitle =
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case yearlyTitle =~~ "/(19[0-9][0-9]|20[0-9][0-9])/" :: Maybe [[String]] of
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Just [[_, year]] -> year
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otherwise -> error $ "unexpected yearlyTitle: " ++ yearlyTitle
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main = do
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let start = "https://ep.com.pl/archiwum/"
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let shadowLibrary = ShadowLibrary {logoUrl=Nothing,
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lname="Elektronika praktyczna",
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abbrev="EP",
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lLevel=0,
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webpage=start}
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extractItemsStartingFromUrl shadowLibrary start (extractRecords)-- >>> arr toShadowItem)
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