title_with_video/tasks/task1.py

"""
@author: luojunhui
"""
import asyncio

from static.config import db_article, db_video
from applications.schedule import search_videos
from applications.functions.log import logging
from static.config import spider_coroutines

# Temporary solution for task dead-lock
g_values = {'row_offset': 0}

class MatchTask1(object):
    """
    定时执行任务
    """

    def __init__(self, mysql_client):
        """
        :param mysql_client:
        """
        self.mysql_client = mysql_client

    async def get_task(self):
        """
        获取任务
        :return:
        """
        select_limit = spider_coroutines * 100
        select_sql1 = f"""
            SELECT content_id, id
            FROM {db_article} 
            WHERE content_status = 0 and process_times <= 3
            AND id >= {g_values['row_offset']}
            ORDER BY id
            LIMIT {select_limit};
        """
        content_ids = await self.mysql_client.async_select(select_sql1)
        unique_content_ids = set()
        for content_id in content_ids:
            unique_content_ids.add(content_id[0])
        if not unique_content_ids:
            return []
        g_values['row_offset'] = content_ids[-1][1]
        print(f"update row offset to: {g_values['row_offset']}")
        unique_content_ids = list(unique_content_ids)[0:spider_coroutines]
        logging(
            code=9001,
            function="task1.get_task",
            info=f"unique content ids in batch: {len(unique_content_ids)}"
        )
        content_ids_tuple = str(unique_content_ids).replace("[", "(").replace("]", ")")
        if len(content_ids_tuple) > 3:
            select_sql = f"""
                SELECT trace_id, content_id, gh_id, article_title, article_text, content_status, process_times
                FROM {db_article} 
                WHERE content_id in {content_ids_tuple} and process_times <= 3 
                ORDER BY request_time_stamp
                ASC;
            """
            task_list = await self.mysql_client.async_select(sql=select_sql)
            task_obj_list = [
                {
                    "trace_id": item[0],
                    "content_id": item[1],
                    "gh_id": item[2],
                    "title": item[3],
                    "text": item[4],
                    "content_status": item[5],
                    "process_times": item[6]
                } for item in task_list
            ]
            logging(
                code="9001",
                function="task1.get_task",
                info="本次任务获取到 {} 条视频".format(len(task_obj_list)),
                data=[x['content_id'] for x in task_obj_list]
            )
            return task_obj_list
        else:
            return []

    async def get_history_videos(self, content_id):
        """
        check whether the contents videos exists
        :param content_id:
        :return:
        """
        select_sql = f"""
            SELECT video_id
            FROM {db_video}
            where content_id = '{content_id}' and video_status = 1 order by request_time DESC;
        """
        content_videos = await self.mysql_client.async_select(select_sql)
        videos = [vid for vid in content_videos]
        if len(videos) >= 3:
            return videos
        else:
            return None

    async def judge_content_processing(self, content_id):
        """
        判断该content_id是否在处理中
        :param content_id:
        :return:
        """
        select_sql = f"""
                       SELECT trace_id, content_status
                       FROM {db_article}
                       WHERE content_id = '{content_id}'
                       ORDER BY id DESC;
                   """
        result = await self.mysql_client.async_select(select_sql)
        if result:
            for item in result:
                trace_id, content_status = item
                if content_status == 1:
                    return False
            return True
        else:
            return True

    async def use_exists_contents_videos(self, video_id_list, params):
        """
        使用已经存在的视频id
        :return:
        """
        trace_id = params['trace_id']
        content_id = params['content_id']
        select_sql = f"""
            SELECT kimi_title
            FROM {db_article}
            WHERE content_id = '{content_id}' and kimi_title is not null limit 1;
        """
        info = await self.mysql_client.async_select(sql=select_sql)
        kimi_title = info[0]
        update_sql = f"""
            UPDATE {db_article}
            SET 
                kimi_title=%s,
                recall_video_id1=%s, 
                recall_video_id2=%s, 
                recall_video_id3=%s,
                content_status=%s,
                process_times = %s
            WHERE  trace_id = %s
        """
        vid1, vid2, vid3 = video_id_list[0], video_id_list[1], video_id_list[2]
        await self.mysql_client.async_insert(
            sql=update_sql,
            params=(
                kimi_title,
                video_id_list[0],
                "NULL" if vid2 is None else vid2,
                "NULL" if vid3 is None else vid3,
                2,
                int(params['process_times']) + 1,
                trace_id
            )
        )
        logging(
            code="9002",
            info="已从历史文章更新，文章id： {}".format(content_id),
            trace_id=trace_id
        )

    async def start_process(self, params):
        """
        开始处理
        :param params:
        :return:
        """
        # 更新文章contentId为1， 说明该文章正在处理中
        update_sql = f"""
            UPDATE {db_article}
            SET 
                content_status = %s
            WHERE 
                trace_id = %s;
        """
        await self.mysql_client.async_insert(
            sql=update_sql,
            params=(
                1, params['trace_id']
            )
        )
        try:
            video_count = await search_videos(
                params={
                    "title": params['title'],
                    "content": params['text'],
                    "trace_id": params['trace_id'],
                    "content_id": params['content_id']
                },
                trace_id=params['trace_id'],
                gh_id=params['gh_id'],
                mysql_client=self.mysql_client
            )
            select_sql = f"""
                SELECT video_id
                FROM {db_video}
                WHERE content_id = '{params['content_id']}'
            """
            result = await self.mysql_client.async_select(sql=select_sql)
            vid1, vid2, vid3 = result[0], result[1], result[2]
            if vid1 or vid2 or vid3:
                update_sql2 = f"""
                    UPDATE {db_article}
                    SET
                        recall_video_id1 = %s,
                        recall_video_id2 = %s,
                        recall_video_id3 = %s,
                        content_status = %s,
                        process_times = %s
                        WHERE trace_id = %s;
                """
                await self.mysql_client.async_insert(
                    sql=update_sql2,
                    params=(
                        vid1 if vid1 else "NULL",
                        vid2 if vid2 else "NULL",
                        vid3 if vid3 else "NULL",
                        2,
                        {int(params['process_times']) + 1},
                        params['trace_id']
                    )
                )
                logging(
                    code="9008",
                    info="视频搜索成功， 状态修改为2",
                    trace_id=params['trace_id']
                )
            else:
                if int(params['process_times']) < 3:
                    update_sql3 = f"""
                        UPDATE {db_article}
                        SET 
                           content_status = %s,
                           process_times = %s
                        WHERE trace_id = %s;
                                    """
                    await self.mysql_client.async_insert(
                        sql=update_sql3,
                        params=(0, int(params['process_times']) + 1, params['trace_id'])
                    )
                    logging(
                        code="9018",
                        info="视频搜索失败，回退状态为0",
                        trace_id=params['trace_id']
                    )
                else:
                    update_sql3 = f"""
                        UPDATE {db_article}
                        SET 
                           content_status = %s,
                           process_times = %s
                        WHERE trace_id = %s;
                                    """
                    await self.mysql_client.async_insert(
                        sql=update_sql3,
                        params=(3, int(params['process_times']) + 1, params['trace_id'])
                    )
                    logging(
                        code="9019",
                        info="视频多次搜索失败，状态修改为3",
                        trace_id=params['trace_id']
                    )
        except Exception as e:
            if int(params['process_times']) < 3:
                logging(
                    code="9018",
                    info="{}异常错误:{}， 回退状态为0".format(params['trace_id'], e),
                    trace_id=params['trace_id']
                )
                update_sql4 = f"""
                    UPDATE {db_article}
                    SET
                       content_status = %s,
                       process_times = %s
                    WHERE trace_id = %s;
                """
                await self.mysql_client.async_insert(
                    sql=update_sql4,
                    params=(0, int(params['process_times']) + 1, params['trace_id'])
                )
            else:
                logging(
                    code="9019",
                    info="{}异常错误:{}, 状态修改为3".format(params['trace_id'], e),
                    trace_id=params['trace_id']
                )
                update_sql4 = f"""
                                    UPDATE {db_article}
                                    SET
                                       content_status = %s,
                                       process_times = %s
                                    WHERE trace_id = %s;
                                """
                await self.mysql_client.async_insert(
                    sql=update_sql4,
                    params=(3, int(params['process_times']) + 1, params['trace_id'])
                )

    async def process_task(self, params):
        """
        异步执行
        :param params:
        :return:
        """
        content_id = params['content_id']
        trace_id = params['trace_id']
        # 判断该篇文章是否存在未下架的视频，且判断是否有3条， 如果没有三条，则启动新抓取任务，后续优化点
        video_id_list = await self.get_history_videos(content_id=content_id)
        if video_id_list:
            # 说明已经存在了结果, 将该条记录下的video_id拿出来
            logging(
                code="9001",
                info="存在历史文章",
                trace_id=trace_id
            )
            # await self.use_exists_contents_videos(video_id_list=video_id_list, params=params)
        else:
            flag = await self.judge_content_processing(content_id)
            if flag:
                logging(
                    code="9004",
                    info="无正在处理的文章ID， 开始处理",
                    trace_id=trace_id
                )
                await self.start_process(params=params)
            else:
                logging(
                    code="9003",
                    info="该文章ID正在请求--文章ID {}".format(content_id),
                    trace_id=trace_id
                )

    async def deal(self):
        """
        处理
        :return:
        """
        task_list = await self.get_task()
        task_dict = {}
        for task in task_list:
            key = task['content_id']
            task_dict[key] = task
        process_list = []
        for item in task_dict:
            process_list.append(task_dict[item])
        if process_list:
            # for task in task_list:
            #     await self.process_task(task)
            tasks = [self.process_task(params) for params in process_list]
            await asyncio.gather(*tasks)
        else:
            logging(
                code="9008",
                info="没有要处理的请求"
            )