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

# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2021 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT

# General class, implementing common methods, using all cpapi plugins by default

import json
import os
import subprocess
import collections

from pwd import getpwuid

from clcommon.features import (
    Feature,
)
from clcommon.cpapi.cpapiexceptions import (
    NotSupported,
    CPAPIExternalProgramFailed
)
from clcommon.lock import acquire_lock

def _not_supported(func):
    def _exception(*a, **kw):
        raise NotSupported(f'"{func.__name__}" api not supported')
    return _exception

GET_CP_PACKAGE_SCRIPT = '/usr/bin/getcontrolpaneluserspackages'
PANEL_USERS_COUNT_FILE = '/var/lve/panel_users_count'

CPAPI_CACHE_STORAGE = '/var/clcpapi'

class GeneralPanelPluginV1:

def __init__(self):
        self._custom_script_name = GET_CP_PACKAGE_SCRIPT

def invalidate_cpapi_cache(self):
        pass

@staticmethod
    def is_cache_valid(cpapi_cache, panel_markers):
        for marker in panel_markers:
            if not os.path.exists(marker):
                return False
        if not os.path.exists(cpapi_cache):
            return False

for marker in panel_markers:
            # if at least 1 marker is older -> cache is invalid
            if os.path.getmtime(marker) > os.path.getmtime(cpapi_cache):
                return False
        return True

@staticmethod
    def rewrite_cpapi_cache(actual_data, cache_file):
        try:
            with acquire_lock(cache_file + '.lock'):
                with open(cache_file, 'w', encoding='utf-8', errors='surrogateescape') as f:
                    json.dump({'data': actual_data}, f, indent=4)
        except PermissionError:
            # it's ok if we cannot update cache because we run as user/mockbuild
            pass

@staticmethod
    def cache_call(**decorator_kwargs):
        def decorator(func):
            def wrapper(*args, **kwargs):
                cache_file = os.path.join(CPAPI_CACHE_STORAGE, func.__name__ + ".cache")
                cache_valid = GeneralPanelPluginV1.is_cache_valid(cache_file, decorator_kwargs['panel_parker'])
                if os.path.exists(cache_file) and cache_valid:
                    try:
                        with open(cache_file, "r", encoding='utf-8', errors='surrogateescape') as f:
                            data = json.load(f)['data']
                    except Exception:
                        # fallback to get data via api call and re-write broken json
                        data = func(*args, **kwargs)
                        GeneralPanelPluginV1.rewrite_cpapi_cache(data, cache_file)
                else:
                    data = func(*args, **kwargs)
                    GeneralPanelPluginV1.rewrite_cpapi_cache(data, cache_file)
                return data

wrapper.__cached_func__ = func
            return wrapper
        return decorator

def getCPName(self):
        """
        Return panel name
        :rtype: str
        :return: Name of panel
        """
        return "GeneralPanel"

def _run_long_script(self, args):
        """
        Just wraps long script calls.
        :param args: arguments to pass
        :return: stdout, stderr
        """
        with subprocess.Popen(
            [self._custom_script_name] + args,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            text=True,
        ) as p:
            out, err = p.communicate()
            returncode = p.returncode

return out, err, returncode

def admin_packages(self, raise_exc=False):
        """
        Return list of available admin's packages
        :param raise_exc: raise exception on exit code != 0
        :return: List of packages. For example
            ['BusinessPackage', 'Package2']
        """
        packages_list = []
        stdout, stderr, returncode = self._run_long_script(['--list-packages'])
        if raise_exc and returncode != 0:
            raise CPAPIExternalProgramFailed(
                stderr or f'Failed to get information about packages: {stdout}')
        for line in stdout.strip().split('\n'):
            if line != '':
                packages_list.append(line)
        return packages_list

def get_reseller_users(self, reseller):
        reseller_users = {}
        out, _, _ = self._run_long_script(['--list-reseller-users=' + str(reseller)])
        for line in out.strip().split('\n'):
            if ',' not in line:
                continue
            line = line.split(',')
            reseller_users[int(line[0])] = {
                'package': line[1],
                'reseller': reseller}
        return reseller_users

def get_uids_list_by_package(self, package_name, reseller_name=None):
        """
        Retrieves uid list for package
        :param package_name: Package name
        :param reseller_name: Reseller name. None for admin's package
        :rtype: List
        :return: List of uids
            Example: [1000, 1002, 1006, 1007, 1008]
        """
        uid_list = []
        try:
            args = ['--package=' + str(package_name)]
            if reseller_name is not None:
                args.append('--reseller='+str(reseller_name))
            stdout, _, _ = self._run_long_script(args)
            uid_list = stdout.split('\n')
            del uid_list[len(uid_list) - 1]
        except (OSError, IOError, AttributeError):
            pass
        return uid_list

def list_all(self, raise_exc=False):
        uid_package_map = {}
        out, _, returncode = self._run_long_script(['--list-all'])
        if raise_exc and returncode != 0:
            raise CPAPIExternalProgramFailed(
                f"Failed to get list of users and their packages: {out}")
        # if script prints error - skip output processing
        if 'error:' not in out:
            for line in out.split('\n'):
                line = line.split(' ', 1)
                if len(line) == 2:
                    uid_package_map[int(line[0])] = line[1]
        return uid_package_map

def list_users(self, raise_exc=False):
        users = {}
        out, err, returncode = self._run_long_script(['--list-users'])
        if raise_exc and returncode != 0:
            raise CPAPIExternalProgramFailed(
                err or f'Failed to get information about users: {out}')
        for line in out.strip().split('\n'):
            if ',' not in line:
                continue
            line = line.split(',')
            users[int(line[0])] = {'package': line[1], 'reseller': line[2]}
        return users

def resellers_packages(self, raise_exc=False):
        """
        Return dictionary, contains available resellers packages, grouped by resellers
        :return: Dictionary.
            Example:
            {'res1': ['BusinessPackage', 'UltraPackage', 'Package'],
             'res2': ['SimplePackage', 'Package'] }
        """
        resellers_packages = collections.defaultdict(list)
        out, err, returncode = self._run_long_script(['--list-resellers-packages'])
        if raise_exc and returncode != 0:
            raise CPAPIExternalProgramFailed(
                err or f'Failed to get information about reseller package: {out}')
        # packages_users output format:
        # {'res1': ['BusinessPackage', 'UltraPackage', 'Package'],
        #              'res2': ['SimplePackage', 'Package'] }
        lines = out.split('\n')
        for line in lines:
            line = line.strip()
            # Pass empty and invalid lines
            if not line:
                continue
            # 0 - reseller_name, 1 - package_name
            line_parts = line.split(' ', 1)
            if len(line_parts) != 2:
                continue
            res_name, pack_name = line_parts[0], line_parts[1]
            resellers_packages[res_name].append(pack_name)
        return resellers_packages

def reseller_package_by_uid(self, user_id):
        # Get package for user
        out, _, _ = self._run_long_script(['--userid=' + str(user_id)])
        package = out.split('\n').pop(0)
        out, _, _ = self._run_long_script(['--get-user-reseller=' + str(user_id)])
        reseller = out.split('\n').pop(0)
        return reseller, package

def admins(self):
        """
        List all admins names in given control panel
        :rtype: List
        :return: list of strings
        """
        return ['root']

def is_admin(self, username):
        """
        Return True if username is in admin names
        :param str username: user to check
        :return: bool
        """
        return username in self.admins()

@_not_supported
    def get_cp_description(self):
        """
        Retrieve panel name and it's version
        :return: dict: { 'name': 'panel_name', 'version': 'panel_version', 'additional_info': 'add_info'}
            or None if can't get info
        """
        pass

@_not_supported
    def resellers(self):
        """
        Generates a list of resellers in the control panel
        :return: tuple of cpusers registered in the control panel
        :rtype: tuple
        :raise: NotSupported
        """
        pass

@_not_supported
    def is_reseller(self, username):
        """
        Check if user is reseller;
        :type username: str
        :rtype: bool
        """
        pass

@_not_supported
    def db_access(self):
        """
        Getting root access to mysql database.
        For example {'login': 'root', 'db': 'mysql', 'host': 'localhost', 'pass': '9pJUv38sAqqW'}
        :return: root access to mysql database
        :rtype: dict
        :raises: NoDBAccessData, NotSupported
        """
        pass

@_not_supported
    def dblogin_cplogin_pairs(self, cplogin_lst=None, with_system_users=False):
        """
        Returs a list of pairs, the database user login - user login control panel
        For example:
            (('nata2_someuse', 'nata2'), ('testsome_dfrtbus', 'testsome'))
        :param list|tuple|None cplogin_lst: list of control panel users
        :param bool with_system_users: add system users to dbmapping
        :return: list of pairs, the database user login - user login control panel
        :rtype: tuple
        :raises: NotSupported, NoPackage
        """
        pass

@_not_supported
    def cpinfo(self, cpuser=None, keyls=('cplogin', 'package', 'mail', 'reseller', 'dns'),
               search_sys_users=True):
        """
        Retrives information aboutv panel users
        :param str|unicode|list|tuple|None cpuser: user login
        :param keyls: - list of data which is necessary to obtain the user, the values can be:
               cplogin - name/login user control panel
               mail - Email users
               reseller - name reseller/owner users
               locale - localization of the user account
               package - User name of the package
               dns - domain of the user
               userid - user's uid
        :param search_sys_users:
        :return: returns a tuple of tuples of data in the same sequence as specified keys in keylst
        :rtype: tuple
        """
        pass

@_not_supported
    def get_admin_emails_list(self):
        """
        Gets admin emails list
        :rtype: List
        :return: List: ['admin1@mail.com', 'admin2@mail.com' ]
        """
        pass

@_not_supported
    def docroot(self, domain):
        """
        Return document root for domain
        :return: Cortege: (document_root, owner)
        """
        pass

@_not_supported
    def userdomains(self, cpuser):
        """
        Return domain and document root pairs for control panel user
        first domain is main domain
        :param str|unicode cpuser: user login
        :rtype: List
        :return: list of tuples (domain_name, documen_root)
        """
        pass

@_not_supported
    def useraddondomains(self, cpuser):
        """
        Return addon domain and mountpoint domain pairs for control panel user
        :param str|unicode cpuser: user login
        :return: mapping of addon domain names to their mountpoint names
        :rtype: dict
        """
        pass

@_not_supported
    def homedirs(self):
        """
        Detects and returns list of folders contained the home dirs of users of the cPanel
        :rtype: List
        :return: list of folders, which are parent of home dirs of users of the panel
        """
        pass

@_not_supported
    def reseller_users(self, resellername=None):
        """
        Return reseller users
        :param resellername: reseller name; autodetect name if None
        :rtype: List
        :return list[str]: user names list
        """
        pass

@_not_supported
    def reseller_domains(self, resellername=None):
        """
        Return reseller users and their main domains
        :param resellername: reseller name; autodetect name if None
        :rtype: List
        :return dict[str, str]: pairs user <==> domain
        """
        pass

@_not_supported
    def get_user_login_url(self, domain):
        """
        Get login url for current panel;
        :type domain: str
        :rtype: str
        :return: Panel login URL
        """
        pass

@_not_supported
    def get_reseller_id_pairs(self):
        """
        Get dict reseller => id
        Optional method for panels without hard
        link reseller <=> system user
        :rtype: dict[str,int] - {'res1': id1}
        :return:
        """
        pass

# not documented yet
    @_not_supported
    def get_domains_php_info(self):
        """
        Retrives dictionary information about php versions for each domain
        {
            'domain.com': {
                'php_version_id': 'ea-php70'
                'php_handler': lsapi | fpm | cgi | fastcgi
        }}
        :rtype: dict
        """
        pass

@_not_supported
    def get_installed_php_versions(self):
        """
        Retrives list of php versions installed in panel
        :rtype: list
        """
        pass

# not documented yet
    @_not_supported
    def get_system_php_info(self):
        """
        Retrives dictionary with system information about php
        :rtype: dict
        """
        pass

@_not_supported
    def get_admin_locale(self):
        """
        :rtype: str
        """
        pass

@staticmethod
    @_not_supported
    def get_encoding_name():
        """
        Retrive encoding name, used for package/reseller names, from panel
        :return:
        """
        pass

def get_unsupported_cl_features(self) -> list[Feature]:
        """
        Return list of CloudLinux features that cannot
        be used with current control panel.
        """
        raise NotImplementedError()

@staticmethod
    def get_apache_ports_list():
        """
        Retrieves active httpd's ports from httpd's config
        :return: list of apache's ports
        """
        return [80]

@staticmethod
    def get_apache_connections_number():
        """
        Retrieves Apache's connections number (from mod_status)
        For CM
        """
        # Unsupported panel
        return 0, "OK"

@staticmethod
    def get_apache_max_request_workers():
        """
        Get current maximum request apache workers from httpd's config
        :return: tuple (max_req_num, message)
            max_req_num - Maximum request apache workers number or 0 if error
            message - OK/Trace
        """
        # Unsupported panel
        return 0, "OK"

@staticmethod
    def get_main_username_by_uid(uid: int) -> str:
        """
        Get "main" panel username by uid.
        :param uid: uid
        :return Username
        """
        try:
            # Get username by id
            return getpwuid(uid).pw_name
        except KeyError:
            pass
        return 'N/A'

@staticmethod
    def get_user_emails_list(username: str, domain: str) -> str:
        return ''

@staticmethod
    def panel_login_link(username):
        return ''

@staticmethod
    def panel_awp_link(username):
        return ''

@staticmethod
    def get_hosting_accounts_count() -> int:
        """
        Get users count
        :return: number of users
        """
        if os.path.isfile(PANEL_USERS_COUNT_FILE):
            with open(PANEL_USERS_COUNT_FILE, 'r', encoding='utf-8') as f:
                count = f.read()
            if count:
                return int(count)
        return 0

def get_customer_login(self, username):
        """
        99% of control panels log-in user with same username
        as system user has, except for Plesk
        """
        return username

def get_domain_login(self, username, domain):
        """
        99% of control panels log-in user with same username
        as system user has, in the Plesk panel we need a subscription login
        """
        return username

def get_server_ip(self):
        """
        Get ip of the server that is configured in control panel to be "main".
        """
        raise NotSupported('Unable to detect main ip for this server. '
                           'Contact CloudLinux support and report the issue.')

def suspended_users_list(self):
        return []

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