Library for parsing epub document metadata (Haskell)
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| {-
This is a small app for maintaining the example code that
goes into the Haddock docs for Codec.Epub
-}
import Codec.Epub
import Codec.Epub.Data.Package
import Control.Monad.Except
main :: IO ()
main = do
-- epub-metadata actions are in MonadIO and MonadError, so we're
-- using ErrorT here
result <- runExceptT $ do
-- Use the getPkgXmlFromZip action to extract the Package
-- Document as an XML string. There are also other actions
-- for reading from ByteStringS and directories.
--
-- See Codec.Epub.IO
xmlString <- getPkgXmlFromZip "/path/to/book.epub"
-- Now the sections of meta-information about the book can
-- be extracted from that XML using functions like getPackage,
-- getMetadata, etc.
--
-- See Codec.Epub.Parse
pkg <- getPackage xmlString -- :: Codec.Epub.Data.Package
meta <- getMetadata xmlString -- :: Codec.Epub.Data.Metadata
-- Parts of these data structures can be used from here
-- as needed
--
-- See Codec.Epub.Data.Package for pkgVersion below
-- and the others in Codec.Epub.Data.*
liftIO $ putStrLn $ pkgVersion pkg
-- There is also pretty-print formatting of these data types
-- in Codec.Epub.Data through the Formattable typeclass
--
-- See Codec.Epub.Format
liftIO $ putStr $ format meta
either putStrLn return result
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