Count the time a Minecraft player has been online based on the server based on the logs (useful for logs prior to the implementation of statistics)

timeconnected.py

#!/usr/bin/env python3

import sys
import gzip
import datetime
import os

def checkDirectory(player, directory):
    files = os.listdir(directory)

    connectedTime = 0

    for count,filename in enumerate(files, start=1):
        print("Reading file %s/%s" % ( count, len(files)), end='\r')
        connectedTime += checkFile(player, directory, filename)

    return connectedTime

def checkFile(player, directory, filename):
    """Checks a single file for how many seconds given player has played"""

    fullAddress = directory + filename

    f = gzip.open(fullAddress, 'r')

    # We can find out which log format this file is, if the very first character
    # in the file is a [ then it's type 1, otherwise 0
    if f.readline()[:1] == b'[':
        logType = 1

        # On the logType 1 the year, month and day are in the
        # filename and are not in the content, therefore we must
        # retrieve this information to pass to getUnixTime()
        year = int(filename[0:4])
        month = int(filename[5:7])
        day = int(filename[8:10])

    else:
        logType = 0

        year = None
        month = None
        day = None

    connectedTime = 0

    start = 0

    # Start at 2 because file starts on line 1, and we already read one line
    # to figure out the log format
    for lineNumber,line in enumerate(f, start=2):

        if (bytes(player, encoding="UTF-8") in line) and (b'logged in' in line):
            start = getUnixTime(line, logType, year, month, day)

        if ( bytes(player, encoding="UTF-8") in line) and (b'lost connection' in line) and (start != 0):
            quit = getUnixTime(line, logType, year, month, day)
            connectedTime += quit - start
            start = 0

    f.close()

    return connectedTime

def getUnixTime(line, logType, year=None, month=None, day=None):
    """Returns the unix time a line was logged based on the text in it.
    Supports both the old and new minecraft time-formatting"""

    if (logType == 0):
        year = int(line[0:4])
        month = int(line[5:7])
        day = int(line[8:10])
        hour = int(line[11:13])
        minute = int(line[14:16])
        second = int(line[17:19])

    elif (logType == 1):
        hour = int(line[1:3])
        minute = int(line[4:6])
        second = int(line[7:9])
    
    dt = datetime.datetime(year, month, day, hour, minute, second)
    ut = int(dt.timestamp())

    return ut

def main():
    if (len(sys.argv) < 3):
        print("Invalid arguments. Usage is ./timeconnected.py <LOG FILE DIRECTORY> [player name] ...")
        exit()

    log_dir = sys.argv[1]
    players = sys.argv[2:len(sys.argv)]
    for player in players:
        time = checkDirectory(player, log_dir)
        print(player + " has played for " + str(time) + " seconds.")


if __name__ == "__main__":
    main()