-import XHTML
-
--- Map absolute image URLs to local system file paths where the image
--- referenced by the URL is stored.
-type ImageMap = Map.Map URL FilePath
-
-download_image_urls :: [URL] -> IO ImageMap
-download_image_urls image_urls = do
- files <- mapM save_image image_urls
- let pairs = zip image_urls files
- return $ foldl my_insert empty_map pairs
- where
- empty_map = Map.empty :: ImageMap
-
- my_insert :: ImageMap -> (URL, Maybe FilePath) -> ImageMap
- my_insert dict (_, Nothing) = dict
- my_insert dict (k, Just v) = Map.insert k v dict