forked from filipg/twilight-library
Zagadnienia ekonomiki rolnej
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64
app/zadanie.hs
Executable file
64
app/zadanie.hs
Executable file
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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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extractNestedRecords = extractLinksWithText "//a[@class='archiveVolume' and not(contains(@href, '.PDF')) and not(contains(@href, '.pdf'))]" -- pary adres-tytuł
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>>> second (arr $ replace "\r\n\t\t\t\t" "") -- czyścimy drugi element pary, czyli tytuł z niepotrzebnych białych znaków
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>>> first (extractLinksWithText "//a[contains(@href,'.pdf')]") -- 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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extractRecords = extractLinksWithText "//a[@class='archiveVolume' and (contains(@href,'.pdf') or contains(@href,'.PDF'))]"
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>>> second (arr $ replace "\t" " ")
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-- ... a tutaj te trójki przerabiamy do docelowej struktury ShadowItem
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toShadowItem :: ((String, String), String) -> ShadowItem
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toShadowItem ((url, 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 = "Zagadnienia ekonomiki rolnej " ++ yearlyTitle ++ " " ++ (replace "\r\n" "" (replace "\r\n " "" articleTitle))
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date = getDate yearlyTitle
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toShadowItemTop :: (String, String) -> ShadowItem
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toShadowItemTop (url, articleTitle) =
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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 = "Zagadnienia ekonomiki rolnej " ++ " " ++ (replace "\r\n" "" (replace "\r\n " "" articleTitle))
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date = getDateTop url
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getDate url =
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case url =~~ "[0-9]?[0-9]/(19[0-9][0-9]|20[0-9][0-9])" :: Maybe [[String]] of
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Just [[month, year]] -> month
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otherwise -> error $ "unexpected url: " ++ url
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getDateTop url =
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case url =~~ "[0-9]*(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 url: " ++ url
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main = do
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let start = "http://www.zer.waw.pl/Archive"
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let shadowLibrary = ShadowLibrary {logoUrl=Nothing,
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lname="Ekonomika Rolna",
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abbrev="EkonRol",
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lLevel=0,
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webpage=start}
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extractItemsStartingFromUrl shadowLibrary start (extractNestedRecords >>> arr toShadowItem)
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extractItemsStartingFromUrl shadowLibrary start (extractRecords >>> arr toShadowItemTop)
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@ -58,6 +58,19 @@ executable almanachmuszyny
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, regex-posix
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, shadow-library
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default-language: Haskell2010
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executable ekonrol
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hs-source-dirs: app
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main-is: zadanie.hs
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ghc-options: -threaded -rtsopts -with-rtsopts=-N
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build-depends: base
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, hxt
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, hxt-xpath
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, MissingH
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, regex-posix
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, shadow-library
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default-language: Haskell2010
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source-repository head
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