import os
import re

class CronFile:
    def __init__(self):
        self.fragments = []
        self.sections = {}

    def add_fragment(self, name, content):
        self.fragments.append((name, content))
        if name is not None:
            self.sections[name] = len(self.fragments) - 1

    def get_section(self, name):
        if name in self.sections:
            return self.fragments[self.sections[name]][1]

    def set_section(self, name, content):
        if name not in self.sections:
            self.add_fragment(name, "")
        self.fragments[self.sections[name]] = (name, "\n" + content)