Script to analyze log file and monitor changes

loggify.py

'''
Script to analyze log file and monitor changes

@Author: K.M. Tahsin Hassan Rahit <tahsin.rahit@gmail.com> (12-21206-1)
'''

from Tkinter import *
from bsddb.dbtables import _columns_key
from difflib import Differ
from glob import glob
import os
import thread
import time


class AppFrame(Frame):
    dirPath = '/var/log/*.log'

    def __init__(self, master):
        Frame.__init__(self, master)
        self.grid()
        self.initWidgets()
        self.lpThreads = []
        self.exitFlag = False

    def initWidgets(self):
        self.logFiles = glob(self.dirPath)

        self.leftFrame = LabelFrame(self, text="Log options")
        self.leftFrame.grid()
        self.rightFrame = LabelFrame(self, text="Monitor Log")
        self.rightFrame.grid(row=0, column=1, columnspan=2, rowspan=3)
        self.startButton = Button(self.leftFrame, text="Start", command=self.startCallback)
        self.stopButton = Button(self.leftFrame, text="Stop", command=self.stopCallback, state=DISABLED )
        self.fileListBox = Listbox(self.leftFrame, selectmode=MULTIPLE, height=20)
        self.status = Label(self.leftFrame, text="Not Monitoring")
        
        for logFile in self.logFiles:
            self.fileListBox.insert(END, logFile)

        self.fileListBox.grid()
        self.startButton.grid()
        self.stopButton.grid()
        self.status.grid()

        self.logDisplayText = Text(self.rightFrame, wrap=WORD, height=30)
        self.logDisplayText.grid()
        self.logDisplayText.insert(INSERT, "Script to analyze log file and monitor changes")
        self.logDisplayText.insert(INSERT, "\nAuthor: K.M. Tahsin Hassan Rahit <tahsin.rahit@gmail.com> (12-21206-1)\n")



    def startCallback(self):
        self.exitFlag = False
        self.status['text'] = 'Monitoring'
        self.startButton['state'] = DISABLED
        self.stopButton['state'] = NORMAL
        self.filesToLog = {self.fileListBox.get(logFile) : {} for logFile in self.fileListBox.curselection()}
        for fileToLog in self.filesToLog:
             thread.start_new_thread(self.logIt, (fileToLog,))


    def stopCallback(self):
        self.exitFlag = True
        self.startButton['state'] = NORMAL
        self.stopButton['state'] = DISABLED
        self.status['text'] = 'Not Monitoring'


    def logIt(self, fileLocation):
        fileToMonitor = open(fileLocation, 'r')
        prevFileContents = fileToMonitor.read().splitlines()
        fileToMonitor.close()
        with open('loggify.log', 'w+') as fileToLog:
            fileToLog.write("")
        while not self.exitFlag:
            with open(fileLocation, 'r') as fileToMonitor:
                curFileContents = fileToMonitor.read().splitlines()
            newContents = list(set(curFileContents) - set(prevFileContents))
            if newContents:
                with open('loggify.log', 'r') as fileToLog:
                    prevText = fileToLog.read()
                curText = '\n\n' + fileLocation + ' logged this:\n--------------------------------------------\n' + '\n'.join(newContents)
                textToAdd = prevText + curText
                self.logDisplayText.insert(INSERT, curText)
                with open('loggify.log', 'w+') as fileToLog:
                        fileToLog.write(textToAdd)
            prevFileContents = curFileContents
            time.sleep(2)
        if self.exitFlag:
            thread.exit()


def main():
    baseFrame = Tk()
    baseFrame.title("Loggify bt Rahit : Simple GUI to log everything")
    baseFrame.geometry("750x500")
    appFrame = AppFrame(baseFrame)
    baseFrame.mainloop()


main()