reconfigure

#!/bin/python 

import os
import fileinput
import shutil
import errno
import grp
import stat

def replace_line(filepath, search_text, replace_text):
    # Iterate over the file and replace lines matching search_text with replace_text
    for line in fileinput.input(filepath, inplace=True):
        if line.startswith(search_text) or line.lstrip().startswith(search_text):
            print(replace_text)
        else:
            print(line, end='')

def load_config(filepath):
    if not os.path.isfile(filepath):
        print(f"Configuration file '{filepath}' not found")
        return {}

    config = {}
    with open(filepath, 'r') as file:
        for line in file:
            line = line.strip()
            if line:
                key, value = line.split('=', 1)
                config[key.strip()] = value.strip().strip('"');
    return config

def create_directory_with_user_group_and_permissions(directory_path, user_id, group_name):
    try:
        # Create the directory if it does not exist
        os.makedirs(directory_path, exist_ok=True)
        print(f"Directory '{directory_path}' created successfully.")

        # Look up the GID for the group
        gid = grp.getgrnam(group_name).gr_gid

        # Change the ownership of the directory to user_id and group_id
        os.chown(directory_path, user_id, gid)
        print(f"Changed ownership of '{directory_path}' to user ID {user_id} and group '{group_name}'.")

        # Set directory permissions to read, write, and execute for user and group
        current_permissions = stat.S_IMODE(os.stat(directory_path).st_mode)
        os.chmod(directory_path, current_permissions | stat.S_IRWXU | stat.S_IRWXG)
    except KeyError:
        print(f"Group '{group_name}' not found.")
    except OSError as e:
        if e.errno == errno.EEXIST:
            print(f"Directory '{directory_path}' already exists.")
        else:
            print(f"Error creating/changing '{directory_path}'")


def reconfigure():
    # Load configuration values from file
    config = load_config('/etc/hifiberry.state')

    # Reconfigure Shairport-sync
    if not os.path.isfile('/etc/shairport-sync.conf'):
        print("shairport-sync.conf not found")
        return

    # Replace lines in /etc/shairport-sync.conf
    replace_line('/etc/shairport-sync.conf', 'mixer_control_name = ', '    mixer_control_name = "' + config.get("CURRENT_MIXER_CONTROL", "") + '";')
    replace_line('/etc/shairport-sync.conf', 'name = ', '    name = "' + config.get("CURRENT_SYSNAME", "") + '";')
    replace_line('/etc/shairport-sync.conf', 'run_this_before_play_begins = ', '    run_this_before_play_begins = "/pause-others.sh";')

    # Print status messages
    if config.get('MIXER_CONTROL') != config.get('CURRENT_MIXER_CONTROL'):
        print("updated mixer")

    if config.get('SYSNAME') != config.get('CURRENT_SYSNAME'):
        print("updated system name")

    directory_path = "/tmp/shairport-sync"
    user_id = 2002
    group_name = "audio"
    create_directory_with_user_group_and_permissions(directory_path, user_id, group_name)

if __name__ == "__main__":
    reconfigure()