Source code for ferrosoft.apps.ticketing.api.service

#  Copyright (c) 2025 Ferrosoft GmbH. All rights reserved.
import hashlib
import hmac

from django.core.cache import cache




def generate_comment_hash(content: str) -> str:
    return hashlib.sha256(content.strip().encode()).hexdigest()





class WebhookSignatureValidator:
    def __init__(self, secret_key: str):
        self.secret_key = secret_key



    @classmethod
    def from_django_settings(cls):
        from django.conf import settings

        return cls(getattr(settings, "TAIGA_CONFIG", {}).get("SECRET_KEY"))




    def is_valid(self, signature: str, body: bytes) -> bool:
        computed_signature = hmac.new(
            self.secret_key.encode(), body, hashlib.sha1
        ).hexdigest()
        return hmac.compare_digest(computed_signature, signature)






class CommentService:


    @classmethod
    def is_duplicate(cls, comment: str) -> bool:
        return cache.get(generate_comment_hash(comment)) is not None




    @classmethod
    def is_internal(cls, comment: str) -> bool:
        return comment.startswith("[INTERNAL]")