# Source code for scrapy.extensions.closespider

    """CloseSpider is an extension that forces spiders to be closed after certain
    conditions are met.

    See documentation in docs/topics/extensions.rst
    """

    from __future__ import annotations

    import logging
    from collections import defaultdict
    from typing import TYPE_CHECKING, Any

    from scrapy import Request, Spider, signals
    from scrapy.exceptions import NotConfigured

    if TYPE_CHECKING:
        from twisted.python.failure import Failure

        # typing.Self requires Python 3.11
        from typing_extensions import Self

        from scrapy.crawler import Crawler
        from scrapy.http import Response

    logger = logging.getLogger(__name__)

    class CloseSpider:
        def __init__(self, crawler: Crawler):
            self.crawler: Crawler = crawler

            self.close_on: dict[str, Any] = {
                "timeout": crawler.settings.getfloat("CLOSESPIDER_TIMEOUT"),
                "itemcount": crawler.settings.getint("CLOSESPIDER_ITEMCOUNT"),
                "pagecount": crawler.settings.getint("CLOSESPIDER_PAGECOUNT"),
                "errorcount": crawler.settings.getint("CLOSESPIDER_ERRORCOUNT"),
                "timeout_no_item": crawler.settings.getint("CLOSESPIDER_TIMEOUT_NO_ITEM"),
                "pagecount_no_item": crawler.settings.getint(
                    "CLOSESPIDER_PAGECOUNT_NO_ITEM"
                ),
            }

            if not any(self.close_on.values()):
                raise NotConfigured

            self.counter: defaultdict[str, int] = defaultdict(int)

            if self.close_on.get("errorcount"):
                crawler.signals.connect(self.error_count, signal=signals.spider_error)
            if self.close_on.get("pagecount") or self.close_on.get("pagecount_no_item"):
                crawler.signals.connect(self.page_count, signal=signals.response_received)
            if self.close_on.get("timeout"):
                crawler.signals.connect(self.spider_opened, signal=signals.spider_opened)
            if self.close_on.get("itemcount") or self.close_on.get("pagecount_no_item"):
                crawler.signals.connect(self.item_scraped, signal=signals.item_scraped)
            if self.close_on.get("timeout_no_item"):
                self.timeout_no_item: int = self.close_on["timeout_no_item"]
                self.items_in_period: int = 0
                crawler.signals.connect(
                    self.spider_opened_no_item, signal=signals.spider_opened
                )
                crawler.signals.connect(
                    self.item_scraped_no_item, signal=signals.item_scraped
                )

            crawler.signals.connect(self.spider_closed, signal=signals.spider_closed)

        @classmethod
        def from_crawler(cls, crawler: Crawler) -> Self:
            return cls(crawler)

        def error_count(self, failure: Failure, response: Response, spider: Spider) -> None:
            self.counter["errorcount"] += 1
            if self.counter["errorcount"] == self.close_on["errorcount"]:
                assert self.crawler.engine
                self.crawler.engine.close_spider(spider, "closespider_errorcount")

        def page_count(self, response: Response, request: Request, spider: Spider) -> None:
            self.counter["pagecount"] += 1
            self.counter["pagecount_since_last_item"] += 1
            if self.counter["pagecount"] == self.close_on["pagecount"]:
                assert self.crawler.engine
                self.crawler.engine.close_spider(spider, "closespider_pagecount")
                return
            if self.close_on["pagecount_no_item"] and (
                self.counter["pagecount_since_last_item"]
                >= self.close_on["pagecount_no_item"]
            ):
                assert self.crawler.engine
                self.crawler.engine.close_spider(spider, "closespider_pagecount_no_item")

        def spider_opened(self, spider: Spider) -> None:
            from twisted.internet import reactor

            assert self.crawler.engine
            self.task = reactor.callLater(
                self.close_on["timeout"],
                self.crawler.engine.close_spider,
                spider,
                reason="closespider_timeout",
            )

        def item_scraped(self, item: Any, spider: Spider) -> None:
            self.counter["itemcount"] += 1
            self.counter["pagecount_since_last_item"] = 0
            if self.counter["itemcount"] == self.close_on["itemcount"]:
                assert self.crawler.engine
                self.crawler.engine.close_spider(spider, "closespider_itemcount")

        def spider_closed(self, spider: Spider) -> None:
            task = getattr(self, "task", None)
            if task and task.active():
                task.cancel()

            task_no_item = getattr(self, "task_no_item", None)
            if task_no_item and task_no_item.running:
                task_no_item.stop()

        def spider_opened_no_item(self, spider: Spider) -> None:
            from twisted.internet import task

            self.task_no_item = task.LoopingCall(self._count_items_produced, spider)
            self.task_no_item.start(self.timeout_no_item, now=False)

            logger.info(
                f"Spider will stop when no items are produced after "
                f"{self.timeout_no_item} seconds."
            )

        def item_scraped_no_item(self, item: Any, spider: Spider) -> None:
            self.items_in_period += 1

        def _count_items_produced(self, spider: Spider) -> None:
            if self.items_in_period >= 1:
                self.items_in_period = 0
            else:
                logger.info(
                    f"Closing spider since no items were produced in the last "
                    f"{self.timeout_no_item} seconds."
                )
                assert self.crawler.engine
                self.crawler.engine.close_spider(spider, "closespider_timeout_no_item")