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# Copyright Â© Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2018 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT
"""
Library to work with plug-ins
"""

import os
import py_compile
import subprocess
import sys
import pwd
import glob
import shutil
import syslog

from importlib import import_module
from configparser import ConfigParser

from clcommon.clcustomscript import lvectl_custompanel_script, CLSYSCONFIG
from .const import CACHE_CPNAME, UNKNOWN_CP_NAME, UNKNOWN_CP_IMPORT
from .cpapiexceptions import PluginImportError

clsysconfig = ConfigParser(interpolation=None, strict=False)
clsysconfig.read(CLSYSCONFIG)

CONTROLPANELNAME_VAR = '__cpname__'
DETECTFUNCNAME_VAR = 'detect'

PLUGINS_PKG_PREFIX = 'clcommon.cpapi'

PLUGINS_DIR = None
if clsysconfig.has_option(section='cpapi', option='plugindir'):
    PLUGINS_DIR = clsysconfig.get(section='cpapi', option='plugindir')
    if not os.path.exists(PLUGINS_DIR):
        print("WARNING: plugindir is configured, but doesn't exists!")
API_LINK_PATH = os.path.join(os.path.dirname(__file__), 'apilink.py')

CPANEL_NAME = 'cPanel'
DIRECTADMIN_NAME = 'DirectAdmin'
PLESK_NAME = 'Plesk'
ISPMANAGER_NAME = 'ISPManager'
INTERWORX_NAME = 'InterWorx'
UNKNOWN_NAME = 'Unknown'
INTEGRATED_NAME = 'Integrated'

OFFICIAL_PLUGINS = {
    CPANEL_NAME: 'cpanel',
    DIRECTADMIN_NAME: 'directadmin',
    PLESK_NAME: 'plesk',
    ISPMANAGER_NAME: 'ispmanager',
    INTERWORX_NAME: 'interworx',
    UNKNOWN_NAME: 'backward_plugin',
    INTEGRATED_NAME: 'vendors'
}


def detect_panel_fast():
    """
    This function will try to detect our officially supported control panels
    :return: tuple of CP name and CP plugin name to import
    """
    panel_name, official_plugin_name = None, None
    if os.path.isfile('/opt/cpvendor/etc/integration.ini'):
        panel_name, official_plugin_name = INTEGRATED_NAME, OFFICIAL_PLUGINS[INTEGRATED_NAME]
    elif os.path.isfile('/usr/local/cpanel/cpanel'):
        panel_name, official_plugin_name = CPANEL_NAME, OFFICIAL_PLUGINS[CPANEL_NAME]
    elif os.path.isfile('/usr/local/directadmin/directadmin') or\
            os.path.isfile('/usr/local/directadmin/custombuild/build'):
        panel_name, official_plugin_name = DIRECTADMIN_NAME, OFFICIAL_PLUGINS[DIRECTADMIN_NAME]
    elif os.path.isfile('/usr/local/psa/version'):
        panel_name, official_plugin_name = PLESK_NAME, OFFICIAL_PLUGINS[PLESK_NAME]
    # ispmanager must have:
    # v5: /usr/local/mgr5/ directory,
    # v4: /usr/local/ispmgr/bin/ispmgr file
    elif os.path.isfile('/usr/local/ispmgr/bin/ispmgr') or os.path.isdir('/usr/local/mgr5'):
        panel_name, official_plugin_name = ISPMANAGER_NAME, OFFICIAL_PLUGINS[ISPMANAGER_NAME]
    elif os.path.isdir('/usr/local/interworx'):
        panel_name, official_plugin_name = INTERWORX_NAME, OFFICIAL_PLUGINS[INTERWORX_NAME]
    elif lvectl_custompanel_script() is not None:       # Check custom panel script to use backward plugin
        panel_name, official_plugin_name = UNKNOWN_NAME, OFFICIAL_PLUGINS[UNKNOWN_NAME]
    return panel_name, official_plugin_name


def get_cp_plugin_module(plugin_name=None):
    if plugin_name:
        # Case when some "official" plugin was already detected
        return import_module(f'{PLUGINS_PKG_PREFIX}.plugins.{plugin_name}')
    # Use cached module if detect_panel_fast() can't detect anything
    # Actual import statement in file is updated on each rebuild_cache()
    from .apilink import api as _apiplugin  # pylint: disable=import-outside-toplevel
    return _apiplugin


def detectplugin(plugin_pack, ignore_errors=False):
    """
    Scan directory for presence of plugins.  Plugin is a file that has
    the extension ".py" and a non-empty variable "__cpname__" (the name
    of the control panel).  The file must contain a function "detect"
    which returns True in case of presence of the corresponding
    control panel.

    >>> detectplugin('plugins')
    ('from .plugins import cp