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Current File : /proc/4160871/root/opt/cloudlinux/venv/lib64/python3.11/site-packages/clwpos/wp_utils.py
# -*- 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

from __future__ import absolute_import

import json
import os
import pwd
import re
import subprocess
from dataclasses import dataclass
from typing import Optional, Union, List
from functools import lru_cache
from typing_extensions import TypedDict

from clwpos import gettext as _
from clwpos.cl_wpos_exceptions import WposError, WpCliCommandError
from clwpos.constants import RedisRequiredConstants, WP_CLI, WP_CLI_SKIP_PLUGINS_ENV
from clwpos.data_collector_utils import php_info
from clwpos.logsetup import (
    setup_logging,
    ADMIN_LOGFILE_PATH,
    USER_LOGFILE_PATH
)
from clwpos.php.base import PHP
from clwpos.scoped_cache import cached_in_scope
from clwpos.user.cache import wp_config_cache
from clwpos.user.website_check import RollbackException, WebsiteCheckError
from clwpos.user.website_check.errors import (
    WebsiteCheckBadHttpCode,
    CDNActivationFailed,
    JSCssCheckBadHttpCode
)
from clwpos.utils import (
    WposUser,
    is_run_under_user,
    wp_cli_compatibility_check,
    run_in_cagefs_if_needed,
    user_name,
    litespeed_is_running,
    nginx_is_running,
    apache2nginx_is_running,
)

_logger = setup_logging(__name__)


@dataclass
class WordpressError:
    message: str
    context: dict
    code: Optional[int] = None


def get_php_version(abs_wp_path: str) -> PHP:
    """
    Return php_version that will be used for calling wp-cli commands.
    If 'CLWPOS_USE_SAVED_PHP_VERSION' envar is defined,
    try to get this version from a previously saved file.
    """
    use_saved_php_version = bool(os.environ.get("CLWPOS_USE_SAVED_PHP_VERSION"))
    if use_saved_php_version:
        php_version = _get_saved_php_version(abs_wp_path) or _get_php_version(abs_wp_path)
    else:
        php_version = _get_php_version(abs_wp_path)
    return php_version


@lru_cache(maxsize=None)
def _get_php_version(abs_wp_path: str) -> PHP:
    """Return PHP version."""
    result = php_info()

    items = []
    for item in result:
        if abs_wp_path.startswith(os.path.normpath(item["documentroot"])):
            items.append((item["documentroot"], item["version"]))
    items.sort(reverse=True)
    return items[0][1]


def _get_saved_php_version(abs_wp_path: str) -> Optional[PHP]:
    """
    Get domain's php version from a previously saved file.
    """
    if not is_run_under_user():
        raise WposError('Internal Error. Contact CloudLinux support')
    php_file_id = os.environ.get("CLWPOS_PHP_FILE_ID")
    php_info_file = WposUser(user_name()).php_info.format(file_id=php_file_id)
    if not os.path.exists(php_info_file):
        return None
    try:
        with open(php_info_file) as f:
            _php_info = json.load(f)
    except (OSError, json.decoder.JSONDecodeError) as e:
        _logger.exception("Error during reading of \".php_info\" file: %s", e)
        return None

    php_versions = []
    for vhost_info in _php_info:
        if abs_wp_path.startswith(vhost_info["documentroot"]):
            php_versions.append((vhost_info["documentroot"], vhost_info["version"]))

    if not php_versions:
        return None

    return PHP(**sorted(
        php_versions,
        key=lambda item: item[1]['identifier'],
        reverse=True
    )[0][1])


def wordpress(path: str, command: str, subcommand: str, *args, env=None) -> Union[str, WordpressError]:
    """
    Helper to execute wp commands, for example
        wp --path=<path> plugin install redis-cache
        wp --path=<path> plugin activate redis-cache
        wp --path=<path> redis enable
        wp --path=<path> plugin deactivate redis-cache
        wp --path=<path> plugin uninstall redis-cache
    @return: stderr if error was happened.
    """
    php_version = get_php_version(path)
    php_bin_path = str(php_version.bin)
    if not os.path.exists(php_bin_path):
        _logger.exception("Error during wp-cli command execution \"%s\": "
                          "invalid path to binary file \"%s\"",
                          command, php_bin_path)
        return WordpressError(
            message=_("Error during resolving path to php binary file:\n"
                      "got non-existent path \"%(path)s\"."),
            context={"path": php_bin_path}
        )
    # [attention] compatibility check may raise WpCliUnsupportedException exception
    wp_cli_compatibility_check(php_version)
    command_part = [command, subcommand, *args]
    full_command = [
        WP_CLI,
        php_bin_path,
        path,
        *command_part
    ]
    environment = env or {}
    _logger.info('Executing command=%s', ' '.join(full_command))
    try:
        output = run_in_cagefs_if_needed(full_command, check=True, env=environment)
    except subprocess.CalledProcessError as error:
        post_check_flag = 'Post-check failed' in error.stderr
        command = ' '.join(full_command)
        _logger.exception("Error during command execution: \n%s\n"
                          "stdout=%s\n"
                          "stderr=%s",
                          command, error.stdout, error.stderr)
        logger_path = ADMIN_LOGFILE_PATH if not os.getuid() else USER_LOGFILE_PATH.format(
            homedir=pwd.getpwuid(os.getuid()).pw_dir)
        if post_check_flag:
            _process_post_check(error, logger_path)
        else:
            message = _("Unexpected error happened during command execution: '%(command)s'.\n"
                        "Event is logged to file: '%(logger_path)s' with stdout and stderr recorded.")
            context = {
                "command": command,
                "logger_path": logger_path,
                "error_desc": error.stderr
            }
        return WordpressError(
            message=message,
            context=context,
            code=error.returncode
        )
    _logger.info('Command=%s returned output=%s', ' '.join(full_command), str(output.stdout))
    return output.stdout


def _process_post_check(
        result: subprocess.CalledProcessError,
        log_path: str):
    """
    In some rare cases plugin installation (CDN) may return
    post-check errors which we should handle properly.
    """
    # case 1: plugin did not replace static links on website
    # with cdn urls for some reason
    cnd_not_active_msg = "CDN url not found on page"
    if cnd_not_active_msg in result.stderr:
        raise RollbackException(CDNActivationFailed(log_path))

    # case 2: website returned error code during check
    # URL ' . $this->url . ' returned unexpected response status (' . $this->url_code . ‘)’
    url_match = 'URL '
    unexpected_error_match = 'returned unexpected response status'
    if url_match in result.stderr and unexpected_error_match in result.stderr:
        # "URL https://.../ ", " status (300)"
        url_part, code_part = result.stderr.split(unexpected_error_match)

        url = url_part.split()[1]
        code = code_part.strip("( )’'")

        raise RollbackException(
            WebsiteCheckBadHttpCode(url, code)
        )

    # case 3: website itself works fine, but plugin was not able to reach static files
    # CDN url returned unexpected response status (' . $this->static_code . ’)
    unexpected_error_static_content = 'CDN url returned unexpected response status'
    if unexpected_error_static_content in result.stderr:
        # "URL https://.../ ", " status (300)"
        code_part = result.stderr.split('(')[1]
        code = code_part.strip("( )’'")

        raise RollbackException(
            JSCssCheckBadHttpCode(code)
        )

    # case 4: unknown error
    message = _("WordPress plugin failed to activate correctly. "
                "Changes were reverted and caching module is now disabled.\n"
                "Error reported from plugin: \n"
                "%(error_desc)s.\n\n"
                "Event is logged to file: '%(logger_path)s' with stdout and stderr recorded.")
    context = {
        "command": result.cmd,
        "logger_path": log_path,
        "error_desc": result.stdout + result.stderr
    }

    raise RollbackException(WebsiteCheckError(
        header='Post check failed',
        description=message,
        context=context,
        fix_tip='',
    ))


def is_multisite(path: str) -> bool:
    marker = 'cl_multisite_detected'
    command = 'if ( is_multisite() ) { echo "%s"; } else { echo "not_multisite"; }' % marker

    with wp_config_cache('is_multisite', path=path) as record:
        if record.data:
            return marker in record.data

        result = wordpress(path, 'eval', command, env={WP_CLI_SKIP_PLUGINS_ENV: '1'})
        if isinstance(result, WordpressError):
            raise WposError(message=result.message, context=result.context)
        record.data = result
        return marker in result


def wp_get_constant(wp_path: str, constant: str, raise_exception=False) -> Optional[str]:
    """
    Get:
    - defined constant value
    - None in case of error
    - empty string if no such constant found
    """
    command = "if (defined('%(const)s')) { echo %(const)s; }" % {'const': constant}

    with wp_config_cache('const.' + constant, path=wp_path) as record:
        if record.data:
            return record.data

        result = wordpress(wp_path, 'eval', command, env={WP_CLI_SKIP_PLUGINS_ENV: '1'})
        if isinstance(result, WordpressError):
            if raise_exception:
                raise WpCliCommandError(message=result.message, context=result.context)
            _logger.error('Error during get WP constant: %s', result)
            return None
        record.data = result
        return result


def diagnose_redis_connection_constants(docroot: str, wordpress_path: str):
    """
    Check required constants for redis connection establishment
    """
    redis_schema = wp_get_constant(os.path.join(docroot, wordpress_path), RedisRequiredConstants.WP_REDIS_SCHEME.name,
                                   raise_exception=True)
    if not redis_schema and redis_schema != RedisRequiredConstants.WP_REDIS_SCHEME.val:
        raise WposError('WordPress constant "%(constant)s" is not defined or defined with wrong value %(value)s',
                        context={'constant': RedisRequiredConstants.WP_REDIS_SCHEME.name, 'value': redis_schema})
    socket = wp_get_constant(os.path.join(docroot, wordpress_path), RedisRequiredConstants.WP_REDIS_PATH.name,
                             raise_exception=True)
    if not socket:
        raise WposError('WordPress constant "%(constant)s" is not defined',
                        context={'constant': RedisRequiredConstants.WP_REDIS_PATH.name})
    if not os.path.exists(socket):
        raise WposError('Redis socket %(socket)s does not exist in the system',
                        context={'socket': socket})


def obtain_wp_cli_env():
    """
    Returns needed envars for wp-cli
    """
    server_software = 'Apache'
    server_software_extra = ''
    if litespeed_is_running():
        server_software = 'LiteSpeed'
    elif nginx_is_running():
        server_software = 'nginx'

    if apache2nginx_is_running():
        server_software_extra = 'CloudLinux MAx Webserver'

    return {
        'SERVER_SOFTWARE': server_software,
        'SERVER_SOFTWARE_EXTRA': server_software_extra,
    }


class PluginInfo(TypedDict):
    # e.g. "clsop",
    name: str

    # e.g. "active",
    status: str

    # e.g. "none",
    update: str

    # e.g. "3.12.6.1-1-2"
    version: str


@cached_in_scope
def _cached_plugin_list(abs_wp_path: str, wp_cli_env=None) -> List[PluginInfo]:

    if wp_cli_env:
        wp_cli_env = dict(wp_cli_env)
        wp_cli_env.update({WP_CLI_SKIP_PLUGINS_ENV: '1'})
    else:
        wp_cli_env = {WP_CLI_SKIP_PLUGINS_ENV: '1'}

    result = wordpress(abs_wp_path, "plugin", "list", "--json", env=wp_cli_env)

    # TODO: raise exceptions instead of silent errors
    if isinstance(result, WordpressError):
        return []

    # Try to find json, when output contains php errors
    def _maybe_json(output):
        _result = None
        pattern = r'(\[{.*?}\])'
        matches = re.search(pattern, output)
        if matches:
            try:
                json_string = matches.group(1)
                _result = json.loads(json_string)
            except Exception:
                pass

        return _result


    try:
        plugin_list_raw = json.loads(result)
    except (ValueError, TypeError, json.JSONDecodeError) as e:
        maybe_json_result = _maybe_json(result)
        if maybe_json_result is not None:
            plugin_list_raw = maybe_json_result
        else:
            raise WposError(
                message=_(
                    'Malformed plugins information received from wp-cli. '
                    'Raw response is %(response)s.'),
                context={'response': result},
                details=str(e)
            )

    # https://cl.sentry.cloudlinux.com/organizations/cloudlinux_os/issues/163201/events/f59273162433432e86f2d83bdb4848d7/?project=22
    if not isinstance(plugin_list_raw, list):
        raise WposError(
            message=_(
                'Malformed plugin list received from wp-cli. '
                'Raw response is %(response)s.'),
            context={'response': result}
        )

    for plugin_info in plugin_list_raw:
        if not isinstance(plugin_info, dict):
            raise WposError(
                message=_(
                    'Malformed plugin information received from wp-cli. '
                    'Raw response is %(response)s.'),
                context={'response': result}
            )
    return plugin_list_raw


def plugin_list(abs_wp_path: str, wp_cli_env=None) -> List[PluginInfo]:
    return _cached_plugin_list(
        os.path.normpath(abs_wp_path), tuple(wp_cli_env.items())
        if wp_cli_env else None
    )


def list_active_plugins(abs_wp_path: str, wp_cli_env=None):
    return [
        item for item in plugin_list(abs_wp_path, wp_cli_env)
        if item['status'] == 'active'
    ]


def get_plugin_data(wordpress_abs_path, plugin_name) -> List[PluginInfo]:
    plugins_data = plugin_list(abs_wp_path=wordpress_abs_path)
    if isinstance(plugins_data, WordpressError):
        raise WposError(message=plugins_data.message,
                        context=plugins_data.context)
    return [item for item in plugins_data if item['name'] == plugin_name]


def is_plugin_activated(abs_wp_path: str, plugin_name: str, wp_cli_env=None) -> bool:
    return any(item['name'] == plugin_name and item['status'] == 'active'
               for item in plugin_list(abs_wp_path, wp_cli_env))


def is_plugin_installed(abs_wp_path: str, plugin_name: str, wp_cli_env=None) -> bool:
    return any(item['name'] == plugin_name for item in plugin_list(abs_wp_path, wp_cli_env))


def update_constant(abs_wp_path: str, constant_name: str, constant_value=None) -> Optional[WordpressError]:
    if constant_value is None:
        # Remove constant
        result = wordpress(abs_wp_path, "config", "has", constant_name, "--type=constant",
                           env={WP_CLI_SKIP_PLUGINS_ENV: '1'})
        # Skip, because not zero return code means that constant doesn't exist
        if isinstance(result, WordpressError):
            result = None
        else:
            result = wordpress(abs_wp_path, "config", "delete", constant_name, "--type=constant", "--quiet",
                               env={WP_CLI_SKIP_PLUGINS_ENV: '1'})
    else:
        # Update constant
        result = wordpress(abs_wp_path, "config", "set", constant_name, constant_value, "--raw", "--type=constant",
                           '--anchor=// End of CloudLinux generated section', "--placement=before", "--quiet",
                           env={WP_CLI_SKIP_PLUGINS_ENV: '1'})
    return result


def update_redis_disable_banners_constant(abs_wp_path: str, constant_value=None) -> Optional[WordpressError]:
    return update_constant(abs_wp_path, RedisRequiredConstants.WP_REDIS_DISABLE_BANNERS.name, constant_value)

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