Shutdown check monitor

# -*- coding: utf-8 -*-
# This script set new parameters in nvr-system-settings.ini
#
# Script is available only for TrassirOS
#
# Version: 2.0
# Author: A.A.Trubilin, DSSL
# E-mail: a.trubilin@dssl.ru
"""
<parameters>
    <company>AATrubilin</company>
    <title>nvr-system-settings</title>
    <version>2.0</version>
</parameters>
"""

import os
import ConfigParser as configparser

from __builtin__ import object as py_object

import host


class ResultMessage(Exception):
    pass


class NvrSystemSettings(py_object):
    _SETTINGS_PATH = "/home/trassir/nvr-system-settings.ini"

    def __init__(self, setting_path=None):
        """Set/update parameters in nvr-system-settings.ini

        Args:
            setting_path (str, optional): Full path to setting file
        """
        if setting_path is None:
            setting_path = self._SETTINGS_PATH
        self.setting_path = setting_path

        if not os.path.isfile(setting_path):
            raise IOError("File {!r} not found".format(self.setting_path))

        self.config = configparser.ConfigParser()
        self.config.read(setting_path)

    def _set_parameter(self, section, key, value):
        """Set parameter to section

        Args:
            section (str): Parameter section
            key (str): Parameter key
            value (str): Parameter value
        """
        try:
            self.config.set(section, key, value)
        except configparser.NoSectionError:
            self.config.add_section(section)
            self.config.set(section, key, value)

    def set_from_dict(self, settings):
        """Set settings from dict object

        Args:
            settings (Dict[Dict[str: str]]): Settings to update

        Examples:
            settings = {
                "hidden": {
                    "skip_edid_check": "true"
                },
                "keyboard": {
                    keyboard_layouts: 0,
                    keyboard_switch: 1
                }
            }
            This setting will update nvr-system-settings.ini file with:
                [hidden]
                skip_edid_check = true

                [keyboard]
                keyboard_layouts = 0
                keyboard_switch = 1
        """
        if not isinstance(settings, dict):
            raise TypeError("Expected 'dict' got {!r}".format(type(settings).__name__))

        for section, config in settings.iteritems():
            if not isinstance(config, dict):
                raise TypeError(
                    "Expected 'dict' got {!r}".format(type(config).__name__)
                )

            for key, value in config.iteritems():
                self._set_parameter(section, key, value)

        with open(self.setting_path, "w") as setting_file:
            self.config.write(setting_file)


if __name__ == host.stats().parent().guid:
    if os.name == "nt":
        raise OSError("This script is unavailable for WinOS")

    nvr_system_settings = NvrSystemSettings()
    nvr_system_settings.set_from_dict({"hidden": {"skip_edid_check": "true"}})

    raise ResultMessage("""<span style="color: #009900">Success</span>""")