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# -*- coding: utf-8 -*-

# ui_config_lib.py - Library for panel config files manipulating for cloudlinux-config utility

# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2019 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT

from __future__ import absolute_import
import os
import subprocess
from .clconfig_utils import boolean_to_0_1
from clcommon.clexception import FormattedException
from cllimits.lib import exec_utility
from clcommon.ui_config import UIConfig
from clcommon.clquota import check_quota_enabled
import cldetectlib as detect
from clcommon.const import Feature
from clcommon.cpapi import is_panel_feature_supported


class UIConfigException(FormattedException):
    pass


DYNAMIC_UI_CTL_CMD = '/usr/share/l.v.e-manager/utils/dynamicui.py'


def get_ui_config():
    """
       Retrives UI settings from config file
       :return: dict. For example:
           {'inodeLimits': {'showUserInodesUsage': False},
            'uiSettings': {'hideRubyApp': False, 'hideLVEUserStat': False, 'hidePythonApp': False,
                           'hidePHPextensions': True}
           }
    """
    return filter_flags(UIConfig().get_config())


def refresh_panel():
    try:
        retcode, out, err = exec_utility(DYNAMIC_UI_CTL_CMD, ['--sync-conf=all'], stderr=True)
    except OSError as e:
        raise UIConfigException({'message': "Can't execute file %(ctl_cmd)s: " + str(e),
                                 'context': {'ctl_cmd': DYNAMIC_UI_CTL_CMD}})
    if retcode != 0:
        raise UIConfigException({'message': "Error while executing %(ctl_cmd)s: " + out + " " + err,
                                 'context': {'ctl_cmd': DYNAMIC_UI_CTL_CMD}})


def set_ui_config(parameters_dict):
    """
    Sets UI settings to UI config file
    Using subfunction _set_ui_config
    :param parameters_dict: Parameters to set dictionary. For example:
        {'inodeLimits': {'showUserInodesUsage': False},
         'uiSettings': {'hideRubyApp': False, 'hideLVEUserStat': False, 'hidePythonApp': False,
                        'hidePHPextensions': True}
        }
    :return: None
    """
    # Backward compatibility cl-config -> cloudlinux-selector on hidePythonApp
    try:
        # Try to read hidePythonApp key
        enablepythonapp = boolean_to_0_1(not parameters_dict['uiSettings']['hidePythonApp'])
        # Translate enablepythonapp binary key to disabled/enabled format for cl-selector
        lve_to_select = {'0':'disabled', '1': 'enabled'}
        # Call cloudlinux selector with translated param
        # CL-selector doesn't write changes to ui config file
        py_command = ("cloudlinux-selector set --json --interpreter python --selector-status "
            + lve_to_select[enablepythonapp])
        FNULL = open(os.devnull, 'w')
        subprocess.check_call(py_command, shell=True, executable='/bin/bash', stdout=FNULL, stderr=subprocess.STDOUT)
    except (subprocess.CalledProcessError, KeyError):
        pass
    # Call _set_ui_config with all params
    # (duplicate cl-selector call to write changes to config file)
    _set_ui_config(parameters_dict)


def _set_ui_config(parameters_dict):
    """
    Sets UI settings to config file
    :param parameters_dict: Parameters to set dictionary. For example:
        {'inodeLimits': {'showUserInodesUsage': False},
         'uiSettings': {'hideRubyApp': False, 'hideLVEUserStat': False, 'hidePythonApp': False,
                        'hidePHPextensions': True}
        }
    :return: None
    """
    UIConfig().set_config(parameters_dict)
    # Synchronize params with according panel config file
    refresh_panel()


def filter_flags(mapped_flags):
    panel_filter(mapped_flags.get('uiSettings'))
    try:
        if check_quota_enabled() is not None:
            mapped_flags.pop('inodeLimits')
    except KeyError:
        pass
    try:
        if not is_panel_feature_supported(Feature.LVE):
            mapped_flags.get('uiSettings', {}).pop('hideLVEUserStat')
    except KeyError:
        pass
    return mapped_flags


def panel_filter(ui_settings):
    """
    Function that filters UI Settings dictionary
    depending on panel type
    :param ui_settings: UI Settings that is filtered
    """
    if not detect.is_cpanel() or \
            not is_panel_feature_supported(Feature.RUBY_SELECTOR):
        ui_settings.pop('hideRubyApp')
    if detect.is_plesk() or not is_panel_feature_supported(Feature.PYTHON_SELECTOR):
        ui_settings.pop('hidePythonApp')
    if not is_panel_feature_supported(Feature.NODEJS_SELECTOR):
        ui_settings.pop('hideNodeJsApp')
    if not is_panel_feature_supported(Feature.XRAY):
        ui_settings.pop('hideXrayApp')
    if not is_panel_feature_supported(Feature.PHP_SELECTOR):
        ui_settings.pop('hidePhpApp')
        ui_settings.pop('hidePHPextensions')
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