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import logging
import os
import shutil

from defence360agent.contracts.config import SystemConfig
from defence360agent.contracts.messages import MessageType
from defence360agent.contracts.plugins import MessageSink, expect
from im360.contracts.config import ProactiveDefence
from im360.subsys import proactive

logger = logging.getLogger(__name__)


class PhpImmunityPlugin(MessageSink):
    def __init__(self):
        self._loop = None
        self.config_php_immunity = ProactiveDefence.PHP_IMMUNITY

    async def create_sink(self, loop) -> None:
        self._loop = loop

    @expect(MessageType.ConfigUpdate)
    async def on_config_update(self, message: MessageType.ConfigUpdate):
        if (
            isinstance(message["conf"], SystemConfig)
            and self.config_php_immunity != ProactiveDefence.PHP_IMMUNITY
        ):
            self.config_php_immunity = ProactiveDefence.PHP_IMMUNITY
            if not ProactiveDefence.PHP_IMMUNITY:
                if os.path.isfile(proactive.PHP_IMMUNITY_COMPILED_RULES):
                    os.unlink(proactive.PHP_IMMUNITY_COMPILED_RULES)
                else:
                    shutil.rmtree(
                        proactive.PHP_IMMUNITY_COMPILED_RULES,
                        ignore_errors=True,
                    )
            else:
                if os.path.exists(proactive.PHP_IMMUNITY_FILENAME):
                    await proactive.apply_php_immunity_rules()