from typing import Set, List


class ProcessedPostsManager:
    def __init__(self, file_path: str = "processed.txt"):
        self.file_path = file_path
        self.processed_posts: Set[int] = self._load()

    def _load(self) -> Set[int]:
        try:
            with open(self.file_path, "r", encoding="utf-8") as processed:
                return set(processed.readlines())

        except:
            return set()

    def _save(self):
        with open(self.file_path, "w", encoding="utf-8") as processed:
            processed.writelines(lines=self.processed_posts)

    def is_processed(self, post_id: int) -> bool:
        return post_id in self.processed_posts

    def mark_processed(self, post_id: int):
        self.processed_posts.add(post_id)
        self._save()

    def add_existing_posts(self, post_ids: List[int]):
        for post_id in post_ids:
            self.processed_posts.add(post_id)

        self._save()