twilight-library/app/elektronikapraktyczna.hs

106 lines
5.0 KiB
Haskell

{-# 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
import Data.Char (toLower)
class Nothingish a where
nada :: a
instance Nothingish [a] where
nada = []
eliminate :: (Nothingish a) => Maybe a -> a
eliminate (Just a) = a
eliminate Nothing = nada
toLowerString :: [Char] -> [Char]
toLowerString str = [ toLower x | x <- str]
mToString :: Maybe String -> String
mToString n
| n == Nothing = ""
| otherwise = eliminate n
extractMonth :: String -> String
extractMonth n =
case n =~~ ("[A-za-z]+" :: String) of
Just month -> "-" ++ eliminate (baseMonthNameToNumber (toLowerString month))
otherwise -> ""
mExtractYear :: String -> String
mExtractYear n =
case n =~~ ("(1[6789]|20)[0-9][0-9]" :: String) of
Just year -> year
otherwise -> ""
changeDate :: String -> Maybe String
changeDate a = Just (eliminate (extractYear a) ++ extractMonth a)
extractLinksWithArticleTitle xpathCondition = (downloadDocument &&& this)
>>> first (getXPathTrees xpathCondition
>>> (
(getXPathTrees "//div[@class='text']" >>> (listA (deep isText >>> getText)
>>> arr (intercalate " ")))
&&&
(getXPathTrees "//div[@class='files__item']/a[contains(@href,'.pdf')]" >>> (getAttrValue "href"))
))
--extractRecords = extractLinksWithText "(//a[@class='magazine-list__year-item'])[last()]" -- pary adres-tytuł
extractRecords = extractLinksWithText "//a[@class='magazine-list__year-item']" -- pary adres-tytuł
>>> second (arr $ replace "\r\n " "") -- czyścimy drugi element pary, czyli tytuł z niepotrzebnych białych znaków
>>> second (arr $ replace " " "") -- czyścimy drugi element pary, czyli tytuł z niepotrzebnych białych znaków
-- >>> first (arr ((++"tr") . init)) -- modyfikujemy pierwszy element pary, czyli adres URL
>>> first (extractLinksWithText "//div[@class='magazine-list__item']/a") -- pobieramy stronę z adresu URL i wyciągamy linki z tej strony pasujące do wyrażenia XPathowego
>>> first (second (arr $ replace "\r\n " ""))
>>> first (first (
-- extractLinksWithArticleTitle "//div[@class='files__item']/a[contains(@href,'.pdf')]"
(extractLinksWithArticleTitle "//div[@class='magazine-single__content-title article text']")
>>>
first (
first (arr $ replace " " "")
>>> first (arr $ replace "\r\n " "")
)
-- >>> first (arr $ replace "\r\n" "")
-- >>> first (arr $ replace "//" "/")
)
-- >>> second (arr $ changeDate) -- Zmiana nazwy miesiąca na wartość liczbową
>>> second (arr $ replace " " "") >>> second (arr $ replace " " "")
) -- pobieramy stronę z adresu URL i wyciągamy linki z tej strony pasujące do wyrażenia XPathowego
-- ostatecznie wyjdą trójki ((adres URL, tytuł artykułu), tytuł rocznika)
-- ... a tutaj te trójki przerabiamy do docelowej struktury ShadowItem
toShadowItem :: ((((String, String), String), String), String) -> ShadowItem
toShadowItem ((((chapterTitle, url), finalUrl), articleTitle), yearlyTitle) =
(defaultShadowItem url title) {
originalDate = changeDate articleTitle,
itype = "periodical",
format = Just "pdf",
finalUrl = finalUrl
}
where title = "Elektronika Praktyczna " ++ articleTitle ++ " - " ++ chapterTitle
date = yearlyTitle
getDate yearlyTitle =
case yearlyTitle =~~ "/(19[0-9][0-9]|20[0-9][0-9])/" :: Maybe [[String]] of
Just [[_, year]] -> year
otherwise -> error $ "unexpected yearlyTitle: " ++ yearlyTitle
main = do
let start = "https://ep.com.pl/archiwum/"
let shadowLibrary = ShadowLibrary {logoUrl=Nothing,
lname="Elektronika praktyczna",
abbrev="EP",
lLevel=0,
webpage=start}
extractItemsStartingFromUrl shadowLibrary start (extractRecords >>> arr toShadowItem)