#! /bin/python3

import sys, subprocess
from datetime import date
from bs4 import BeautifulSoup

def handle(html):
    soup = BeautifulSoup(html, 'html.parser')
    for graph in soup.select('pre.language-graph'):
        print()
        print(date.today().strftime("%H:%M:%S"))
        print('before:')
        print(graph.string)

        process = subprocess.Popen(
            ["/usr/bin/vendor_perl/graph-easy", "--boxart"], 
            stdin=subprocess.PIPE, 
            stdout=subprocess.PIPE, 
            stderr=subprocess.PIPE
        )
        output, error = process.communicate(input=graph.get_text().encode())
        graph.string = output.decode()

        print('After:')
        print(graph.string)
        print('Error:')
        print(error.decode())
    return str(soup)

for line in sys.stdin:
    file = line.rstrip("\n")
    with open(file, 'r') as html:
        new_content = handle(html)
    with open(file, 'w') as html:
        html.write(new_content)