checking file duplicates seems to work, didnt check in could tho

upload.py

@@ -34,26 +34,23 @@ def upload_file():
     username = session["username"]
     
     if request.method == 'POST':
-        #flask gets the file
-        #print(list(request.files)[0][1])
-        #upload = request.files["file"]
-        #print(upload)
-
-        #uploads = list(request.files)[0]
-        #print(uploads)
-        print(request.files)
+        #@TODO ta forloop bi lahko flashal postopoma
         for upload in request.files.getlist("file"):
             filename = secure_filename(upload.filename)
             # Is there really a file?
             if not filename:
                 flash('There is no file. Try again?')
-
                 return render_template("menu/upload.html", username=username)
 
-            script_path = os.path.dirname(os.path.abspath(__file__))
-            temp_path = os.path.join(script_path, "temp")
+            #prevent duplicate filenames
+            print(filename)
+            if dbsession.query(Card).filter(Card.title == filename).first() != None:
+                flash("Filename already in database, please rename if you want to upload: " + filename, 'error')
+                continue
+
+            script_path = os.path.dirname(os.path.abspath(__file__))    #where are we
+            temp_path = os.path.join(script_path, "temp")               #where is the temp file
             
-            # @TODO ne dela za več fajlov
             # a lot of stuff can wrong here and nobody may know
             with tempfile.NamedTemporaryFile(dir=temp_path, delete=False) as fp:
                 fp.write(upload.stream.read())