added check for pre-existing video files

TVEncoder.py

@@ -151,6 +151,11 @@ def main(argv):
                     filemanager.performpostencodefileoperations(
                         show.inputfile, show.outputfile)
 
+                    if filemanager.checkduplicates(show.outputfile):
+                        actionlogger.info("There is an existing video file"
+                                          "present for {0}"
+                                          .format(show.outputfile))
+
                     generallogger.info("Processing finished.")
                     generallogger.info("==========================="
                                        "=============\n\n")

libfilemanager.py

@@ -112,6 +112,24 @@ class FileManager:
         #will reach here if there were less than numberofFiles found
         return showstoprocess
 
+    def checkduplicates(self, filename):
+        """
+        Check to see if there are any other video files existing for the
+        episode
+        """
+
+        dirname = os.path.dirname(filename)
+        filename = os.path.basename(filename)[:6]
+
+        for dirpath, dirnames, filenames in os.walk(dirname):
+            for show in filenames:
+                extension = os.path.splitext(show)[1]
+                if (extension in [".avi", ".mpg", ".mpeg", "mp4"] and
+                        show[:6] == filename):
+                    return True
+
+        return False
+
     @staticmethod
     def checkfileexists(filename):
         """