X-Git-Url: http://gitweb.michael.orlitzky.com/?p=dead%2Flwn-epub.git;a=blobdiff_plain;f=src%2FMain.hs;h=981a70531d717c1c7bef8f3fa874d26e943140eb;hp=c6ab443a9620d20f716576eb0c188702f8ad4b5d;hb=4220827f62d772d7edcbdcc1c2f13d6c2eb5f534;hpb=6103dbc5f8d3689e32001c3fd7627f3153e40bb0

diff --git a/src/Main.hs b/src/Main.hs
index c6ab443..981a705 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -1,36 +1,101 @@
-{-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE DoAndIfThenElse #-}
 module Main
 where
 
 import Data.Maybe (fromJust)
-import Text.XML.HXT.Core -- (SysConfigList, IOStateArrow, XmlTree, readDocument)
+import Prelude hiding (readFile)
+import System.Directory (doesFileExist)
+import System.IO (
+  Handle,
+  IOMode (WriteMode),
+  hPutStrLn,
+  openBinaryFile,
+  stderr,
+  stdout)
+import System.IO.UTF8 (readFile)
+import Text.XML.HXT.Core (
+  IOStateArrow,
+  XmlTree)
 
-import Epublishable
-import LWN.ArticlePage
-import LWN.FullPage
+import CommandLine (show_help)
+import Configuration (Cfg(..), get_cfg, use_account)
+import LWN.Article (real_article_path)
+import LWN.HTTP (get_page, log_in, make_cookie_jar)
+import LWN.Page (epublish, parse)
+import LWN.XHTML (parse_lwn)
+
+
+
+-- | 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 $ parse_lwn 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)
+
+        case li_result of
+          Left err -> do
+            let msg = "Failed to log in. " ++ err
+            hPutStrLn stderr msg
+          Right response_body -> do
+            hPutStrLn stderr response_body
+
+        html <- get_page (Just cj) my_article
+
+        case html of
+          Left err -> do
+            let msg = "Failed to retrieve page. " ++ err
+            hPutStrLn stderr msg
+            return Nothing
+          Right h -> return $ Just $ parse_lwn h
+      else do
+        html <- get_page Nothing my_article
+        case html of
+          Left err -> do
+            let msg = "Failed to retrieve page. " ++ err
+            hPutStrLn stderr msg
+            return Nothing
+          Right h -> return $ Just $ parse_lwn 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.
+get_output_handle :: FilePath -> IO Handle
+get_output_handle path =
+  if (null path) then
+    return stdout
+  else
+    openBinaryFile path WriteMode
 
-my_read :: String -> IOStateArrow s b XmlTree
-my_read =
-  readDocument [ withValidate  no,
-                 withParseHTML yes,
-                 withInputEncoding utf8,
-                 withWarnings no ]
 
 main :: IO ()
 main = do
-  let article_html = my_read "test/fixtures/501317-article.html"
-  ioap <- parse article_html
-  let article_page :: ArticlePage = fromJust $ ioap
-  epublish article_page "single_article.epub"
-
-  let page_html = my_read "test/fixtures/500848-page.html"
-  ioap_f <- parse page_html
-  let full_page :: FullPage = fromJust $ ioap_f
-  epublish full_page "full_page.epub"
-
-  let bigpage_html = my_read "test/fixtures/50844-bigpage.html"
-  ioap_bp <- parse bigpage_html
-  let bigpage :: FullPage = fromJust $ ioap_bp
-  epublish bigpage "bigpage.epub"
-
-  putStrLn "Done."
+  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 ()