MediaCrawler/store/zhihu/_store_impl.py

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# 1. 不得用于任何商业用途。
# 2. 使用时应遵守目标平台的使用条款和robots.txt规则。
# 3. 不得进行大规模爬取或对平台造成运营干扰。
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# 5. 不得用于任何非法或不当的用途。
#
# 详细许可条款请参阅项目根目录下的LICENSE文件。
# 使用本代码即表示您同意遵守上述原则和LICENSE中的所有条款。


# -*- coding: utf-8 -*-
# @Author  : persist1@126.com
# @Time    : 2025/9/5 19:34
# @Desc    : 知乎存储实现类
import asyncio
import csv
import json
import os
import pathlib
from typing import Dict

import aiofiles
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

import config
from base.base_crawler import AbstractStore
from database.db_session import get_session
from database.models import ZhihuContent, ZhihuComment, ZhihuCreator
from tools import utils, words
from var import crawler_type_var
from tools.async_file_writer import AsyncFileWriter

def calculate_number_of_files(file_store_path: str) -> int:
    """计算数据保存文件的前部分排序数字，支持每次运行代码不写到同一个文件中
    Args:
        file_store_path;
    Returns:
        file nums
    """
    if not os.path.exists(file_store_path):
        return 1
    try:
        return max([int(file_name.split("_")[0]) for file_name in os.listdir(file_store_path)]) + 1
    except ValueError:
        return 1


class ZhihuCsvStoreImplement(AbstractStore):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.writer = AsyncFileWriter(platform="zhihu", crawler_type=kwargs.get("crawler_type"))

    async def store_content(self, content_item: Dict):
        """
        Zhihu content CSV storage implementation
        Args:
            content_item: note item dict

        Returns:

        """
        await self.writer.write_to_csv(item_type="contents", item=content_item)

    async def store_comment(self, comment_item: Dict):
        """
        Zhihu comment CSV storage implementation
        Args:
            comment_item: comment item dict

        Returns:

        """
        await self.writer.write_to_csv(item_type="comments", item=comment_item)

    async def store_creator(self, creator: Dict):
        """
        Zhihu content CSV storage implementation
        Args:
            creator: creator dict

        Returns:

        """
        await self.writer.write_to_csv(item_type="creators", item=creator)


class ZhihuDbStoreImplement(AbstractStore):
    async def store_content(self, content_item: Dict):
        """
        Zhihu content DB storage implementation
        Args:
            content_item: content item dict
        """
        note_id = content_item.get("note_id")
        async for session in get_session():
            stmt = select(ZhihuContent).where(ZhihuContent.content_id == note_id)
            result = await session.execute(stmt)
            existing_content = result.scalars().first()
            if existing_content:
                for key, value in content_item.items():
                    setattr(existing_content, key, value)
            else:
                new_content = ZhihuContent(**content_item)
                session.add(new_content)
            await session.commit()

    async def store_comment(self, comment_item: Dict):
        """
        Zhihu content DB storage implementation
        Args:
            comment_item: comment item dict
        """
        comment_id = comment_item.get("comment_id")
        async for session in get_session():
            stmt = select(ZhihuComment).where(ZhihuComment.comment_id == comment_id)
            result = await session.execute(stmt)
            existing_comment = result.scalars().first()
            if existing_comment:
                for key, value in comment_item.items():
                    setattr(existing_comment, key, value)
            else:
                new_comment = ZhihuComment(**comment_item)
                session.add(new_comment)
            await session.commit()

    async def store_creator(self, creator: Dict):
        """
        Zhihu content DB storage implementation
        Args:
            creator: creator dict
        """
        user_id = creator.get("user_id")
        async for session in get_session():
            stmt = select(ZhihuCreator).where(ZhihuCreator.user_id == user_id)
            result = await session.execute(stmt)
            existing_creator = result.scalars().first()
            if existing_creator:
                for key, value in creator.items():
                    setattr(existing_creator, key, value)
            else:
                new_creator = ZhihuCreator(**creator)
                session.add(new_creator)
            await session.commit()


class ZhihuJsonStoreImplement(AbstractStore):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.writer = AsyncFileWriter(platform="zhihu", crawler_type=kwargs.get("crawler_type"))

    async def store_content(self, content_item: Dict):
        """
        content JSON storage implementation
        Args:
            content_item:

        Returns:

        """
        await self.writer.write_single_item_to_json(item_type="contents", item=content_item)

    async def store_comment(self, comment_item: Dict):
        """
        comment JSON storage implementation
        Args:
            comment_item:

        Returns:

        """
        await self.writer.write_single_item_to_json(item_type="comments", item=comment_item)

    async def store_creator(self, creator: Dict):
        """
        Zhihu content JSON storage implementation
        Args:
            creator: creator dict

        Returns:

        """
        await self.writer.write_single_item_to_json(item_type="creators", item=creator)


class ZhihuSqliteStoreImplement(ZhihuDbStoreImplement):
    """
    Zhihu content SQLite storage implementation
    """
    pass