1 files changed, 45 insertions, 0 deletions

diff --git a/Main.hs b/Main.hs
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+++ b/Main.hs
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+{-# LANGUAGE NoImplicitPrelude   #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+module Main where
+
+import           Rebase.Prelude
+import           System.Directory     (createDirectoryIfMissing, renameFile)
+import           System.FilePath      (takeFileName, (</>))
+import           System.FSNotify      (Event (..), watchDir, withManager)
+import           System.Process.Typed (proc, runProcess)
+
+verbose :: Bool
+verbose = True
+
+pdfDirectory, seenDir, pdfPrinterExecutable :: FilePath
+pdfDirectory         = "."
+seenDir              = pdfDirectory </> "seen"
+pdfPrinterExecutable = "PDFtoPrinter.exe"
+
+main :: IO ()
+main = do
+  createDirectoryIfMissing False seenDir
+  withManager $ \mgr -> do
+    void $ watchDir mgr pdfDirectory (const True) handleEvent
+    forever $ threadDelay 1000000
+
+handleEvent :: Event -> IO ()
+handleEvent (Added f _) | (".pdf" `isSuffixOf` f) = handleNewPdf f
+handleEvent x           = when verbose $ print x
+
+handleNewPdf :: FilePath -> IO ()
+handleNewPdf f =
+  -- Note: there is no sense in checking the return result, as PDFtoPrinter.exe
+  -- returns success even when it fails to parse the PDF.
+  runProcessVerbose pdfPrinterExecutable [f] >>
+  moveFileIntoDir f seenDir
+
+
+runProcessVerbose :: FilePath -> [String] -> IO ExitCode
+runProcessVerbose exe args = do
+  when verbose $ putStrLn $ "+ " ++ exe ++ " " ++ unwords args
+  runProcess (proc exe args)
+
+moveFileIntoDir :: FilePath -> FilePath -> IO ()
+moveFileIntoDir f d = renameFile f $ d </> takeFileName f
+