mirror of
https://github.com/dgtlmoon/changedetection.io.git
synced 2025-11-04 00:27:48 +00:00
67 lines
2.7 KiB
Python
67 lines
2.7 KiB
Python
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from . import difference_detection_processor
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from copy import deepcopy
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from loguru import logger
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import hashlib
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import urllib3
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urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
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name = 'Re-stock detection for single product pages'
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description = 'Detects if the product goes back to in-stock'
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class UnableToExtractRestockData(Exception):
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def __init__(self, status_code):
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# Set this so we can use it in other parts of the app
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self.status_code = status_code
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return
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class perform_site_check(difference_detection_processor):
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screenshot = None
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xpath_data = None
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def run_changedetection(self, uuid, skip_when_checksum_same=True):
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# DeepCopy so we can be sure we don't accidently change anything by reference
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watch = deepcopy(self.datastore.data['watching'].get(uuid))
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if not watch:
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raise Exception("Watch no longer exists.")
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# Unset any existing notification error
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update_obj = {'last_notification_error': False, 'last_error': False}
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self.screenshot = self.fetcher.screenshot
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self.xpath_data = self.fetcher.xpath_data
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# Track the content type
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update_obj['content_type'] = self.fetcher.headers.get('Content-Type', '')
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update_obj["last_check_status"] = self.fetcher.get_last_status_code()
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# Main detection method
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fetched_md5 = None
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if self.fetcher.instock_data:
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fetched_md5 = hashlib.md5(self.fetcher.instock_data.encode('utf-8')).hexdigest()
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# 'Possibly in stock' comes from stock-not-in-stock.js when no string found above the fold.
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update_obj["in_stock"] = True if self.fetcher.instock_data == 'Possibly in stock' else False
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logger.debug(f"Watch UUID {uuid} restock check returned '{self.fetcher.instock_data}' from JS scraper.")
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else:
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raise UnableToExtractRestockData(status_code=self.fetcher.status_code)
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# The main thing that all this at the moment comes down to :)
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changed_detected = False
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logger.debug(f"Watch UUID {uuid} restock check - Previous MD5: {watch.get('previous_md5')}, Fetched MD5 {fetched_md5}")
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if watch.get('previous_md5') and watch.get('previous_md5') != fetched_md5:
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# Yes if we only care about it going to instock, AND we are in stock
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if watch.get('in_stock_only') and update_obj["in_stock"]:
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changed_detected = True
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if not watch.get('in_stock_only'):
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# All cases
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changed_detected = True
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# Always record the new checksum
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update_obj["previous_md5"] = fetched_md5
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return changed_detected, update_obj, self.fetcher.instock_data.encode('utf-8').strip()
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