-{-# LANGUAGE ScopedTypeVariables, RecordWildCards #-}
+{-# LANGUAGE ScopedTypeVariables, RecordWildCards, DoAndIfThenElse #-}
module Main
where
+import Control.Monad (when)
+import Data.Maybe (fromJust)
+import Prelude hiding (readFile)
+import System.Directory (doesFileExist)
import System.IO (
Handle,
IOMode (WriteMode),
+ hPutStrLn,
openBinaryFile,
+ stderr,
stdout
)
-import Text.XML.HXT.Core
+import System.IO.UTF8 (readFile)
+import Test.HUnit (Assertion, assertEqual)
+import Test.Framework (Test, testGroup)
+import Test.Framework.Providers.HUnit (testCase)
+import Text.Regex.Posix ((=~))
+import Text.XML.HXT.Core hiding (when)
-import CommandLine (Args(..), apply_args)
-import LWN.Page
+import CommandLine (show_help)
+import Configuration (Cfg(..), get_cfg, use_account)
+import LWN.HTTP (get_page, log_in, make_cookie_jar)
+import LWN.Page (epublish, parse)
+import LWN.URI (is_lwn_url, make_absolute_url, make_https)
+import Misc (contains)
-my_read :: String -> IOStateArrow s b XmlTree
-my_read =
- readDocument [ withValidate no,
+
+my_read_opts :: SysConfigList
+my_read_opts = [ withValidate no,
withParseHTML yes,
- withInputEncoding utf8,
withWarnings no ]
+-- | My version of HandsomeSoup's parseHTML.
+my_read :: String -> IOStateArrow s b XmlTree
+my_read = readString my_read_opts
+
+-- | Try to parse the given article using HXT. We try a few different
+-- methods; if none of them work, we return 'Nothing'.
+get_xml_from_article :: Cfg -> IO (Maybe (IOStateArrow s b XmlTree))
+get_xml_from_article cfg = do
+ my_article <- real_article_path (article cfg)
+ is_file <- doesFileExist my_article
+ case is_file of
+ True -> do
+ contents <- readFile my_article
+ return $ Just $ my_read contents
+ False -> do
+ -- Download the URL and try to parse it.
+ if use_account cfg then do
+ -- use_account would be false if these fromJusts would fail.
+ cj <- make_cookie_jar
+ li_result <- log_in cj
+ (fromJust $ username cfg)
+ (fromJust $ password cfg)
+ when (not li_result) $ do
+ hPutStrLn stderr "Failed to log in."
+
+ html <- get_page (Just cj) my_article
+ return $
+ case html of
+ Nothing -> Nothing
+ Just h -> Just $ my_read h
+ else do
+ html <- get_page Nothing my_article
+ return $
+ case html of
+ Nothing -> Nothing
+ Just h -> Just $ my_read h
+
-- | If we're given an empty path, return a handle to
-- 'stdout'. Otherwise, open the given file and return a read/write
-- handle to that.
openBinaryFile path WriteMode
+
-- | Convert the given article to either a URL or a filesystem
-- path. If the given article exists on the filesystem, we assume
-- it's a file. Otherwise, we check to see if it's a URL. Failing
-- that, we try to construct a URL from what we're given and do our
-- best.
real_article_path :: String -> IO String
-real_article_path = return . id
+real_article_path s = do
+ is_file <- doesFileExist s
+ return $ if is_file then s else check_cases
+ where
+ abs_current =
+ case make_absolute_url "current" of
+ Nothing -> s
+ Just ac -> ac
+ abs_article =
+ case make_absolute_url ("Articles/" ++ s) of
+ Nothing -> s
+ Just as -> as
+
+ check_cases :: String
+ check_cases
+ | is_lwn_url s = make_https s
+ | s `contains` "current" = abs_current
+ | s =~ "^[0-9]+$" = abs_article
+ | otherwise = s -- Give up
main :: IO ()
main = do
- Args{..} <- apply_args
- output_handle <- get_output_handle output
- input_path <- real_article_path article
- let html = my_read input_path
- result <- parse html
+ cfg <- get_cfg
+ output_handle <- get_output_handle (output cfg)
+
+ maybe_html <- get_xml_from_article cfg
+
+ case maybe_html of
+ Just html -> do
+ result <- parse html
+ case result of
+ Just stuff -> epublish stuff output_handle
+ Nothing -> do
+ _ <- show_help
+ return ()
+
+ Nothing -> do
+ _ <- show_help
+ return ()
+
+
+test_current_article_path :: Assertion
+test_current_article_path = do
+ let expected = "https://lwn.net/current"
+ actual <- real_article_path "current"
+ assertEqual "Current article path constructed" expected actual
+
+test_numbered_article_path :: Assertion
+test_numbered_article_path = do
+ let expected = "https://lwn.net/Articles/69"
+ actual <- real_article_path "69" -- I'm twelve
+ assertEqual "Numbered article path constructed" expected actual
+
+
+test_full_article_path :: Assertion
+test_full_article_path = do
+ let expected = "https://lwn.net/Articles/502979/"
+ actual <- real_article_path "https://lwn.net/Articles/502979/"
+ assertEqual "Full article path left alone" expected actual
- case result of
- Just stuff -> epublish stuff output_handle
- Nothing -> return ()
+test_non_https_article_path :: Assertion
+test_non_https_article_path = do
+ let expected = "https://lwn.net/Articles/502979/"
+ actual <- real_article_path "http://lwn.net/Articles/502979/"
+ assertEqual "Non-https URL made https" expected actual
- putStrLn "Done."
+main_tests :: Test
+main_tests =
+ testGroup "Main Tests" [
+ testCase "Current article path constructed" test_current_article_path,
+ testCase "Numbered article path constructed" test_numbered_article_path,
+ testCase "Full article path left alone" test_full_article_path,
+ testCase "Non-https URL made https" test_non_https_article_path ]
projects / dead / lwn-epub.git / blobdiff