Javascript Compiler.py

# Import Modules -----------------------------------

import src.tokenizer as tokenizer
import src.grammar.cfg2cnf as cfg2cnf
import src.parser as parser
import os
import sys
import time

# Function -----------------------------------------

# 1. Display Splash Screen
def displaySplash():
    print("                                                        ")
    print("       _                   _____           _       _    ")
    print("      | |                 / ____|         (_)     | |   ")
    print("      | | __ ___   ____ _| (___   ___ _ __ _ _ __ | |_  ")
    print("  _   | |/ _` \ \ / / _` |\___ \ / __| '__| | '_ \| __| ")
    print(" | |__| | (_| |\ V / (_| |____) | (__| |  | | |_) | |_  ")
    print("  \____/ \__,_| \_/ \__,_|_____/_\___|_|  |_| .__/ \__| ")
    print("   _____                      _ _           | |         ")
    print("  / ____|                    (_) |          |_|         ")
    print(" | |     ___  _ __ ___  _ __  _| | __ __ __             ")
    print(" | |    / _ \| '_ ` _ \| '_ \| | |/ _ \ '__|            ")
    print(" | |___| (_) | | | | | | |_) | | |  __/ |               ")
    print("  \_____\___/|_| |_| |_| .__/|_|_|\___|_|               ")
    print("                       | |                              ")
    print("                       |_|                              ")
    print("                                                        ")

# 2. Display Result
def displayResult(isAccepted, time):
    
    if isAccepted:
        print()
        print("-----========= ACCEPTED =========-----")
        print()
        print(f"      Compiled in {f'{time:.3f}'} seconds.")
        print("      Your code is ready to go!!       ")
        print()
        print("-----========= ######## =========-----")
        print()

    else:
        print()
        print("-----========= SYNTAX ERROR =========-----")
        print()
        print("         Maybe you forgot a comma?        ")
        print()
        print("-----========= ############ =========-----")
        print()
        sys.exit()

def displayWarning():
    print()
    print("-----========= WARNING ERROR =========-----")
    print()
    print("      Your file seems to be empty  :/       ")
    print()
    print("-----========= ############# =========-----")
    print()
    sys.exit(1)

# Main Program -------------------------------------

# 1. Display splash screen
mainLoop = 1
displaySplash()

# 2. Input
while mainLoop:
    print()
    print("Enter the name of your js file: ", end="")
    file_name = input()

    # 3. Input validation
    file_path = f"test/{file_name}"

    if '.' not in file_path:
        file_path = f"test/{file_name}.js"

    while not file_path.endswith(".js"):
        print()
        print("File type not supported.")
        print("Enter the name of your js file: ", end="")
        file_name = input()

    # 3. Validate character and Create token
    print(f"\nReading '{file_name}'")
    print("Compiling your code...")
    time_start = time.time()
    tokens = tokenizer.createToken(file_path)
    tokens = [token.lower() for token in tokens]

    if len(tokens) == 0:
        displayWarning()
        sys.exit(1)

    # 4. Validate grammar
    cnf = cfg2cnf.mapCNF(cfg2cnf.cfg2cnf((cfg2cnf.readCFG("src/grammar/cfg.txt"))))
    isAcc = parser.parse(tokens, cnf)
    time_end = time.time()

    # 5. Display result
    displayResult(isAcc, time_end-time_start)
    print()