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name : php_manager.py
 # coding: utf-8

# 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 print_function
from __future__ import division
from __future__ import absolute_import
import json
import os
from pwd import getpwuid
from future.utils import iteritems

import cldetectlib as detect
from clcommon.clconfig import get_param, replace_param
from clcommon.ui_config import UIConfig
from clselect.clselectctlphp import format_summary, parse_extensions, API_1

from clselect import ClSelect

from clselect import ClUserSelect, ClExtSelect, ClUserExtSelect, ClUserOptSelect
from clselect.baseclselect import BaseSelectorError
from clselect.clselectexcept import ClSelectExcept as ClSelectExceptions
from clcommon.cpapi import get_main_username_by_uid


class PhpManager(object):
    """Responsible for actual PhpSelector selector high-level API"""

    interpreter = 'php'
    # DirectAdmin parameters
    DA_PATH = "/usr/local/directadmin/plugins/phpselector/plugin.conf"
    DA_PARAM = "active"

    def __init__(self, cfg=None, pkg=None):
        euid = os.geteuid()
        self.is_root_user = euid == 0
        self.user_name = get_main_username_by_uid(euid)
        if self.is_root_user:
            self.cl_select_lib = ClSelect(self.interpreter)
        else:
            self.cl_select_lib = ClUserSelect(self.interpreter)

    @property
    def selector_enabled(self):
        """
        Get current status for panel
        :return: bool
        """
        if detect.is_da():
            # DirectAdmin
            return get_param(self.DA_PATH, self.DA_PARAM) == "yes"
        else:
            return not UIConfig().get_param('hidePhpApp', 'uiSettings')

    @selector_enabled.setter
    def selector_enabled(self, status):
        """
        Enable/disable selector for each panel
        :param status: bool
        :return:
        """
        if detect.is_da():
            try:
                replace_param(self.DA_PATH, self.DA_PARAM, "yes" if status else "no")
            except (OSError, IOError) as e:
                raise BaseSelectorError("Can not process config file %s with reason: %s" % (
                    self.DA_PATH, str(e)))
            UIConfig().set_config({'uiSettings': {'hidePhpApp': not status}})
        else:
            UIConfig().set_config({'uiSettings': {'hidePhpApp': not status}})


    @property
    def extensions_is_hidden(self):
        """
        Extensions was hidden by admin
        :return: bool
        """
        return UIConfig().get_param('hidePHPextensions', 'uiSettings') is True

    @property
    def domains_tab_is_hidden(self):
        """
        Domains tab was hidden by admin
        :return: bool
        """
        return UIConfig().get_param('hideDomainsTab', 'uiSettings') is True

    def switch_current_version(self, version):
        """
        Set current version for user
        :param version: str
        :return: None (succes)
        """
        if self.is_root_user:
            raise BaseSelectorError("Not supported as root user")
        # cloudlinux-selector utility automatically drops privileges
        # so there is no way to know here that we are executed from root
        # keep it this way until someone asks to change it
        elif message := self._get_version_selection_disabled_msg():
            raise ClSelectExceptions.VersionModificationBlocked(message)

        c = ClUserSelect(self.interpreter)
        c.set_version(self.user_name, str(version))
        c.clean_crui_images([self.user_name])

    def reset_extensions(self, version):
        """
        Reset extension for selected version
        :param version:  str
        :return: List of enabled extensions after reset
        """
        if self.is_root_user:
            raise BaseSelectorError("Not supported as root user")
        ClSelect.check_multiphp_system_default_version()
        c = ClUserExtSelect(self.interpreter)
        extensions = c.reset_extensions(self.user_name, str(version))
        c.clean_crui_images([self.user_name])
        return {"extensions": extensions}

    def set_extensions(self, version, extensions):
        """
        Set extensions for php version for admin and user
        :param version: str
        :param extensions: list
        :return: response for user. Error or warning list or no error
        """
        to_enable = []
        for k, v in iteritems(extensions):
            if v == "enabled":
                to_enable.append(k)
            elif v != "disabled":
                return {"status": "ERROR: %s is not a valid state of an extension" % v}
        if self.is_root_user:
            ClExtSelect(self.interpreter).replace_extensions(str(version), to_enable)
            return {}
        else:
            if self.extensions_is_hidden:
                raise BaseSelectorError("Extensions was disabled by admin")
            c = ClUserExtSelect(self.interpreter)
            extensions, resolved_dependencies, conflict_dependencies = c\
                .bulk_replace_extensions(self.user_name, str(version), to_enable)
            c.clean_crui_images([self.user_name])
            if resolved_dependencies:
                resolved_dependencies = ['{} enabled as dependency ({})'.format(*ext) for ext in resolved_dependencies]
            # ToDo: add ability to show several warnings and split messages
            warnings = (', '.join(resolved_dependencies)) if resolved_dependencies else ''
            if conflict_dependencies:
                if warnings:
                    warnings = warnings + '. '
                warnings = warnings + '{} skipped as conflicting.'.format(', '.join(conflict_dependencies))
            if warnings:
                return {'warning': warnings}
        return {}

    def get_summary(self):
        """
        Return all information of php selector
        All extensions(user, admin) and options(for user), selected version (for user)

        :return: dict
        """
        summary_data = self._fetch_summary_data()
        summary_json = self._parse_summary_data_to_json(summary_data)

        summary_json.update(self._get_common_summary_data())
        if not self.is_root_user:
            summary_json.update(self._get_user_specific_summary_data(summary_data))

        if 'available_versions' not in summary_json:
            if 'message' in summary_json:
                raise BaseSelectorError(summary_json['message'])
            return {'status': 'ERROR', 'data': summary_json}

        self._process_versions(summary_json['available_versions'])
        return summary_json

    def _fetch_summary_data(self):
        """
        Fetch summary data for user or root

        :return: tuple containing the summary data
        """
        if self.is_root_user:
            return self.cl_select_lib.get_summary(False)
        try:
            return self.cl_select_lib.get_summary(self.user_name, True)
        except ClSelectExceptions.NotCageFSUser as e:
            raise BaseSelectorError({
                'message': 'User %(user)s not in CageFs',
                'context': {'user': self.user_name}
            }) from e

    def _parse_summary_data_to_json(self, summary_data):
        """
        Parse summary data to JSON format

        :param summary_data: tuple
        :return: dict
        """
        json_data = format_summary(summary_data, format='json', api_version=API_1)
        return json.loads(json_data)

    def _get_common_summary_data(self):
        """
        Get summary data applicable for both root and non-root users

        :return: dict containing common summary data
        """
        return {
            'selector_enabled': self.selector_enabled,
            'extensions_is_hidden': self.extensions_is_hidden,
            'domains_tab_is_hidden': self.domains_tab_is_hidden,
        }

    def _get_user_specific_summary_data(self, summary_data):
        """
        Get summary data specific to non-root users

        :param summary_data: tuple containing the summary data
        :return: dict with user-specific summary data
        """
        selected_version = self._find_selected_version(summary_data)
        version_selection_disabled_msg = self._get_version_selection_disabled_msg()

        data = {}
        if selected_version:
            data['selected_version'] = selected_version
        if version_selection_disabled_msg:
            data['version_selection_disabled_msg'] = version_selection_disabled_msg
        return data

    def _find_selected_version(self, summary_data):
        """
        Determine the PHP version selected by the user based on the summary data.

        :param summary_data: tuple
            A tuple containing version information
        :return: str or None
            The selected PHP version as a string if found, otherwise None
        """
        for version_info in summary_data:
            version, (_, _, is_selected) = version_info
            if is_selected:
                return version
        return None

    def _get_version_selection_disabled_msg(self):
        """
        Retrieve the message displayed when PHP version selection is disabled.
        This method is only applicable for non-root users

        :return: str - The message indicating why PHP version selection is disabled for the user
        """
        return self.cl_select_lib.get_version_selection_disabled_msg(self.user_name)

    def _process_versions(self, versions_list):
        """
        Process versions list and add extensions and options to it
        :param versions_list: list of versions
        """
        for item in versions_list:
            # get extensions for users only and exclude native version
            if not self.is_root_user and item['version'].startswith('native'):
                continue
            try:
                extensions_json = self._get_extensions(item['version'])
                item.update(extensions_json)
            except ClSelectExceptions.UnableToGetExtensions as e:
                raise BaseSelectorError({
                    'message': str(e),
                    'details': e.details,
                }) from e

            # get options for every version for users exclude native
            if not self.is_root_user and not item['version'].startswith('native'):
                try:
                    options_json = ClUserOptSelect(self.interpreter).get_options(
                        self.user_name,
                        item['version'],
                    )
                    item['options'] = options_json
                except ClSelectExceptions.UnableToGetExtensions as e:
                    raise BaseSelectorError({
                        'message': str(e),
                        'details': e.details,
                    }) from e

    def set_options(self, version, options):
        """
        Save php options
        :param version: version which save options for
        :type version: str
        :param options: dict of options for save
        :type options: dict
        :return: None (success)
        """
        if self.is_root_user:
            raise BaseSelectorError("Not supported as root user")
        ClSelect.check_multiphp_system_default_version()

        c = ClUserOptSelect(self.interpreter)
        c.bulk_insert_options(
            self.user_name,
            str(version),
            options)
        c.clean_crui_images([self.user_name])

    def switch_default_version(self, version):
        ClSelect(self.interpreter).set_version(str(version))

    def get_current_version(self, user_names = None):
        """
        Return current versions for list of users or all users
        :param user_names: array of users
        :return: information with users and versions
        """
        user_map = ClUserSelect(self.interpreter).get_version_user_map(user_names)
        result = {}
        for version, users in user_map.items():
            result.update({user: {'version': version} for user in users})
        return {'users': result}

    def _get_extensions(self, version):
        """
        return list of exnensions for selected version
        (for user and admin)
        :param version: version get extensions for
        :type version: str
        :return:
        """
        if self.is_root_user:
            # Recreate ClExtSelect for noncache
            ext_list = ClExtSelect(self.interpreter).list_extensions(version)
        else:
            ext_list = ClUserExtSelect(self.interpreter).list_all_extensions(self.user_name, version)
        return parse_extensions(ext_list, version, fmt='json')
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