import datetime

# Just in case, we'll clear all the existing callbacks for FILEBEFORESAVE

notepad.clearCallbacks([NOTIFICATION.FILEBEFORESAVE])

# Define the function to call just before the file is saved

def addSaveStamp(args):

if notepad.getBufferFilename(args["bufferID"])[-4:] == '.log':

result = notepad.messageBox("Saving a .log file. Would you like to append a 'File saved on...' message to the file? (This is a Python Script event, click cancel to stop this message appearing)", "Python Script Callback", MESSAGEBOXFLAGS.YESNOCANCEL)

if result == MESSAGEBOXFLAGS.RESULTCANCEL:

notepad.clearCallbacks([NOTIFICATION.FILEBEFORESAVE])

elif result == MESSAGEBOXFLAGS.RESULTYES:

notepad.activateBufferID(args["bufferID"])

editor.appendText("File saved on %s\r\n" % datetime.date.today())

# ... and register the callback

notepad.callback(addSaveStamp, [NOTIFICATION.FILEBEFORESAVE])

# As this is a sample, we'll inform the user

notepad.messageBox("FILEBEFORESAVE notification registered.\n*.log files will now automatically be modified before saving.\nCtrl-Click the script to edit.\n", "Python Script Demo", 0)