Parse a SA-MP (San Andreas Multiplayer) Scavenge and Survive server log and make it all gay with colours, while viewing it live.

server_log.py

import os
import time

class Colors:
    BLACK        = "\033[0;30m"
    RED          = "\033[0;31m"
    GREEN        = "\033[0;32m"
    YELLOW       = "\033[0;33m"
    BLUE         = "\033[0;34m"
    MAGENTA      = "\033[0;35m"
    CYAN         = "\033[0;36m"
    WHITE        = "\033[0;37m"
    BOLD         = "\033[1m"
    BOLD_BLACK   = "\033[1;30m"
    BOLD_RED     = "\033[1;31m"
    BOLD_GREEN   = "\033[1;32m"
    BOLD_YELLOW  = "\033[1;33m"
    BOLD_BLUE    = "\033[1;34m"
    BOLD_MAGENTA = "\033[1;35m"
    BOLD_CYAN    = "\033[1;36m"
    BOLD_WHITE   = "\033[1;37m"
    RESET        = "\033[0m"

colors = {
    Colors.BLACK      : ["connection", "part", "logout"],
    Colors.RED        : ["kill", "death", "knockout", "wound", "OnVehicleDeath", "debug"],
    Colors.GREEN      : ["info", "server", "save", "REGISTER"],
    #Colors.YELLOW    : ["focus"],
    Colors.BLUE       : ["wakeup", "construct"],
    Colors.MAGENTA    : ["vehicle", "VLOCK", "_SaveVehicle", "DestroyWorldVehicle"],
    Colors.CYAN       : ["join", "spawn", "login", "loginprompt", "displayloginprompt", "loadaccount", "DisplayRegisterPrompt", "RegisterPrompt"],
    Colors.BOLD       : ["chat","command"],
    Colors.BOLD_BLACK : ["focus"],
    Colors.BOLD_YELLOW: ["deffail", "newchar", "SPECTATE"],
    Colors.BOLD_RED   : ["additem", "EXPLOSIVE"],
}
    
# Make sure the file exists before doing anything else.
while not os.path.exists("server_log.txt"):
    print("Waiting for server_log.txt to be created...")
    time.sleep(1)

# Open the file and seek to the end.
f = open("server_log.txt", "r", encoding="utf-8")
f.seek(0, os.SEEK_END)

while True:
    # Read the file and print any new lines.
    # Account for when unable to decode the line
    try:
        line = f.readline()
    except UnicodeDecodeError:
        line = f.readline()

    if not line: continue

    content = line[11:]

    if line.find("ERROR:") != -1:
        print(Colors.RED + line + Colors.RESET, end="")
        continue

    elif line.find("INFO:") != -1:
        print(Colors.BLUE + line + Colors.RESET, end="")
        continue

    # Check if there is a tag
    elif line[11] == "[":
        tag = line[12:line.find("]", 11)]

        if tag == "chat": continue

        # Set Color according to tag
        for color in colors:
            # Lowercase the tag and check against the list of tags for that color, in lowercase.
            if tag.lower() in [t.lower() for t in colors[color]]:
                print(color + line + Colors.RESET, end="")
                break
        else:
            print(line, end="") # No color found for this tag, print normally.        

    else: # No identifier, print normally.
        print(Colors.BOLD + line[:10] + Colors.YELLOW + line[10:] + Colors.RESET, end="")

    # If the file is deleted, wait for it to be recreated.
    # Might happen when the server restarts.
    if not os.path.exists("server_log.txt"):
        print("server_log.txt was deleted. Waiting for it to be recreated...")

        f.close()
        while not os.path.exists("server_log.txt"):
            print("Waiting for server_log.txt to be created...")
            time.sleep(1)

        f = open("server_log.txt", "r", encoding="utf-8")
        f.seek(0, os.SEEK_END)

    time.sleep(0.1) # Wait a bit before reading the file again.

# Close the file when done. * Meh this will never happen.
f.close()