MOD continuing of the Haskell version

[pompage.git] / src / Pompage.hs

diff --git a/src/Pompage.hs b/src/Pompage.hs
index b986e99..6cf4349 100644 (file)
--- a/src/Pompage.hs
+++ b/src/Pompage.hs
@@ -1,7 +1,14 @@
 import System.IO (readFile, FilePath(..))
-import System.Environment (getArgs)
+import System.Directory (
+     getDirectoryContents
+   , doesDirectoryExist
+   )
+import System.FilePath ((</>))
+import System.Environment (getArgs, getProgName)
 import Data.List
+import Text.Printf (printf)
 import Text.XML.Light
+import Control.Monad (foldM)
 
 type Movies = [Movie]
 
@@ -23,35 +30,79 @@ data Movie = Movie {
    , url :: String
 } deriving (Show)
 
-data Args = Args {
-     xml :: String
-   , moviesDir :: FilePath
-} deriving (Show)
+data Arg = XML | MovieDir deriving (Show, Eq)
+type Args = [(Arg, String)]
 
-test = do
+main = do
    args <- getArgs
-   case readArgs args of
-      Left mess -> print mess
-      Right args -> do
-         paths <- moviePaths $ moviesDir args
-         file <- readFile "../xml/test.xml"
-         print $ parseXMLDoc file
+   progName <- getProgName
+   case checkArgs $ readArgs args of
+      Nothing -> printf usage progName
+      Just args -> do
+         let Just dir = lookup MovieDir args
+         let Just xmlFile = lookup XML args
+         paths <- moviePaths dir
+         movies <- readXMLFile xmlFile
+         print movies
+         print paths
 
 movieExtenstions = ["avi", "mkv", "rmvb", "ogm", "divx"]
-
-readArgs :: [String] -> Either String Args
-readArgs plop = undefined
-{--readArgs (name:value:rest) = case name of
-   "-x" -> { xml = value }
-   "-d" -> { moviesDir = value }--}
+usage = "Usage : %s -d <Movies dir> -x <XML file>\n"
+
+checkArgs :: Maybe Args -> Maybe Args
+checkArgs Nothing = Nothing
+checkArgs (Just args) =
+   case (lookup XML args, lookup MovieDir args) of
+      (Just _, Just _) -> Just args
+      otherwise -> Nothing
+
+readArgs :: [String] -> Maybe Args
+readArgs (name:value:rest)
+   | name == "-x" = (XML, value) <:> readArgs rest
+   | name == "-d" = (MovieDir, value) <:> readArgs rest
+   | otherwise = Nothing
+   where
+      _ <:> Nothing = Nothing
+      arg <:> Just args = Just $ arg : args
+readArgs (_:[]) = Nothing
+readArgs (_) = Just []
 
 moviePaths :: FilePath -> IO [FilePath]
-moviePaths dir = undefined
+moviePaths dir = do
+   paths <- filePaths (\filename ->
+      any (`isSuffixOf` filename) movieExtenstions) dir
+   -- Keep only the relative path.
+   return $ map (drop $ Data.List.length dir + 1) paths
+
+filePaths :: (String -> Bool) -> FilePath -> IO [FilePath]
+filePaths predicat baseDir = do
+   processDir baseDir
+   where
+      processDir dir = do
+         contents <- getDirectoryContents dir
+         foldM (\acc entry -> do
+            let absDir = dir </> entry
+            doesDirectoryExist absDir >>= \exists ->
+               if exists
+               then do
+                  paths <- processDir absDir
+                  return (paths ++ acc)
+               else
+                  if predicat entry
+                  then
+                     return (absDir : acc)
+                  else
+                    return acc)
+            []
+            (contents \\ ["..", "."])
+
 
 readXMLFile :: FilePath -> IO Movies
 readXMLFile file = undefined
-
-
+{-
+   file <- readFile "../xml/test.xml"
+   --print $ parseXMLDoc file
+-}
 
 writeXMLFile :: Movies -> FilePath -> IO ()
 writeXMLFile movies file = undefined