Zwracanie Nothing zamiast pustego stringa, dodanie funkcji mapującej

ShadowLibrary/Core.hs

@@ -33,7 +33,7 @@ import Data.Tree.NTree.TypeDefs
 import Data.Maybe
 import Control.Monad.Trans
 import Text.XML.HXT.XPath
--- import Text.XML.HXT.Curl
+import Text.XML.HXT.Curl
 import Text.XML.HXT.HTTP
 
 import Text.Regex.TDFA
@@ -64,8 +64,8 @@ downloadDocument = readFromDocument [withParseHTML yes,
                                      withEncodingErrors no,
                                      withPreserveComment yes,
                                      withStrictInput yes,
-                                     withHTTP []
---                                     withCurl [("curl--user-agent","AMU Digital Libraries Indexing Agent")]
+--                                     withHTTP []
+                                     withCurl [("curl--user-agent","AMU Digital Libraries Indexing Agent")]
                                     ]
 
 downloadDocumentWithEncoding enc = readFromDocument [withParseHTML yes,
@@ -73,13 +73,13 @@ downloadDocumentWithEncoding enc = readFromDocument [withParseHTML yes,
                                                      withEncodingErrors no,
                                                      withPreserveComment yes,
                                                      withInputEncoding enc,
-					             withHTTP []]		
---                                                     withCurl []]
+--                       		             withHTTP []]
+                                                     withCurl []]
 
 downloadXmlDocument = readFromDocument [withWarnings no,
                                         withEncodingErrors no,
-					withHTTP []]
---                                        withCurl [] ]
+--					withHTTP []]
+                                        withCurl [] ]
 
 
 data ShadowLibrary = ShadowLibrary { logoUrl :: Maybe String,

app/ptd.hs

@@ -0,0 +1,63 @@
+
+{-# LANGUAGE Arrows, NoMonomorphismRestriction #-}
+
+import ShadowLibrary.Core
+
+import Text.XML.HXT.Core
+import Text.XML.HXT.XPath
+import Data.List
+import Data.List.Utils (replace)
+
+import Text.Regex.Posix
+import Text.Printf
+
+extractNestedLinksWithText xpathCondition = (downloadDocument &&& this)
+                                      >>> first (getXPathTrees xpathCondition
+                                                 >>> ((getXPathTrees "//a" >>> getAttrValue "href")
+                                                      &&& (listA (deep isText >>> getText)
+                                                           >>> arr (intercalate " "))))
+                                      >>> arr rotateSecTh
+                                      >>> first expandURIFixed
+
+extractRecords = extractLinksWithText "//div[@class='entry-content']/p/a[contains(@href, 'id')]"
+                >>> first (arr $ replace "http:" "https:")
+                >>> first (extractNestedLinksWithText "//div[@class='entry-content']/p[strong[a]] | //div[@class='entry-content']/p[a]")
+
+toShadowItem :: ((String, String), String) -> ShadowItem
+toShadowItem ((url, articleTitle), magazineTitle) =
+  (defaultShadowItem url title) {
+    originalDate = date,
+    itype = "periodical",
+    format = Just "pdf",
+    finalUrl = url
+    }
+  where title = magazineTitle ++ " - " ++ (replace " \8211 pdf" "" articleTitle)
+        date = getYear url
+
+getYear :: String -> Maybe String
+getYear url =
+  case url =~~ "/(rocznik[0-9][0-9])/" :: Maybe [[String]] of
+    Just [[_, raw_year]] -> Just (catalogueMapper (replace "rocznik" "" raw_year))
+    otherwise ->  case url =~~ "/(19[0-9][0-9]|20[0-9][0-9])/" :: Maybe [[String]] of
+                  Just [[_, year]] -> (Just year)
+                  otherwise -> Nothing
+
+-- Rozwiązanie także zadziała
+-- catalogueMapper :: String -> String
+-- catalogueMapper number = show((read number :: Integer) + 1952)
+
+catalogueMapper :: String -> String
+catalogueMapper number
+  | number == "67" = "2019"
+  | number == "66" = "2018"
+  | number == "65" = "2017"
+  | number == "64" = "2016"
+
+main = do
+    let baseUrl = "https://www.ptd.pl/?page_id=7"
+    let shadowLibrary = ShadowLibrary {logoUrl=Nothing,
+                                    lname="Polskie Towarzystwo Dendrologiczne",
+                                    abbrev="ptd",
+                                    lLevel=0,
+                                    webpage=baseUrl}
+    extractItemsStartingFromUrl shadowLibrary baseUrl (extractRecords >>> arr toShadowItem)

readme.md

@@ -0,0 +1,19 @@
+# PTD - Polskie Towarzystwo Dendrologiczne
+
+## Wywołanie programu
+```bash
+stack build
+stack exec ptd
+```
+
+## Przykładowa krotka wynikowa:
+Tytuł w postaci Wydawnictwo - Tytuł
+```
+ShadowItem {url = Just "http://www.ptd.pl/ptd/wp-content/download/wydawnictwaPTD/rocznik67/12_R_67_Digitalizacja.pdf", title = "Pe\322ne teksty Rocznik\243w PTD, pocz\261wszy od zeszytu 57; \nwersja online \8211 ISSN 2300-8326 - DOMINIK TOMASZEWSKI \nDigitalizacja zbior\243w zielnikowych \8211 krok w dobr\261 stron\281\8211 \nDigitisation of herbarium collections \8211 a step in the right direction \8211 \160pdf", itype = "periodical", originalDate = Just "2019", creator = Nothing, format = Just "pdf", lang = Just "pol", finalUrl = "http://www.ptd.pl/ptd/wp-content/download/wydawnictwaPTD/rocznik67/12_R_67_Digitalizacja.pdf", description = Nothing}
+```
+W przypadku braku roku zwrócone zostanie ```Nothing```
+
+## Dodatkowe paczki zainstalowane na potrzebę uruchomienia programu:
+```bash
+apt-get install libcurl4-gnutls-dev
+```

shadow-library.cabal

@@ -20,6 +20,7 @@ library
                      , HTTP
                      , hxt
                      , hxt-http
+                     , hxt-curl
                      , hxt-xpath
                      , MissingH
                      , monad-logger
@@ -54,12 +55,26 @@ executable almanachmuszyny
    build-depends:       base
                       , hxt
                       , hxt-xpath
+                      , hxt-curl
                       , MissingH
                       , regex-posix
                       , shadow-library
    default-language:    Haskell2010
 
 
+executable ptd
+   hs-source-dirs:      app
+   main-is:             ptd.hs
+   ghc-options:         -threaded -rtsopts -with-rtsopts=-N
+   build-depends:       base
+                      , hxt
+                      , hxt-xpath
+                      , hxt-curl
+                      , MissingH
+                      , regex-posix
+                      , shadow-library
+   default-language:    Haskell2010
+
 source-repository head
   type:     git
   location: https://github.com/name/project