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116 lines
3.5 KiB
116 lines
3.5 KiB
import json
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import uuid
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import validators
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# Is there an existing library to ensure some data store (JSON etc) is in sync with CRUD methods?
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# Open a github issue if you know something :)
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# https://stackoverflow.com/questions/6190468/how-to-trigger-function-on-value-change
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class ChangeDetectionStore:
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def __init__(self):
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# Base definition for all watchers
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self.generic_definition = {
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'url': None,
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'tag': None,
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'last_checked': 0,
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'last_changed': 0,
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'title': None,
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'uuid': str(uuid.uuid4()),
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'headers' : {}, # Extra headers to send
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'history' : {} # Dict of timestamp and output stripped filename
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}
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try:
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with open('/datastore/url-watches.json') as json_file:
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self.data = json.load(json_file)
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# Reinitialise each `watching` with our generic_definition in the case that we add a new var in the future.
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i = 0
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while i < len(self.data['watching']):
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_blank = self.generic_definition.copy()
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_blank.update(self.data['watching'][i])
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self.data['watching'][i] = _blank
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print("Watching:", self.data['watching'][i]['url'])
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i += 1
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# First time ran, doesnt exist.
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except (FileNotFoundError, json.decoder.JSONDecodeError):
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print("Resetting JSON store")
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self.data = {}
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self.data['watching'] = []
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self._init_blank_data()
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self.sync_to_json()
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def _init_blank_data(self):
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# Test site
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_blank = self.generic_definition.copy()
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_blank.update({
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'url': 'https://changedetection.io',
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'tag': 'general',
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'uuid': str(uuid.uuid4())
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})
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self.data['watching'].append(_blank)
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# Test site
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_blank = self.generic_definition.copy()
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_blank.update({
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'url': 'http://www.quotationspage.com/random.php',
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'tag': 'test',
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'uuid': str(uuid.uuid4())
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})
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self.data['watching'].append(_blank)
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def update_watch(self, uuid, val, var):
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# Probably their should be dict...
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for watch in self.data['watching']:
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if watch['uuid'] == uuid:
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watch[val] = var
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# print("Updated..", val)
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self.sync_to_json()
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def url_exists(self, url):
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# Probably their should be dict...
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for watch in self.data['watching']:
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if watch['url'] == url:
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return True
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return False
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def get_val(self, uuid, val):
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# Probably their should be dict...
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for watch in self.data['watching']:
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if watch['uuid'] == uuid:
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if val in watch:
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return watch[val]
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else:
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return None
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return None
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def add_watch(self, url, tag):
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validators.url(url)
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# @todo use a common generic version of this
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_blank = self.generic_definition.copy()
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_blank.update({
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'url': url,
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'tag': tag,
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'uuid': str(uuid.uuid4())
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})
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self.data['watching'].append(_blank)
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self.sync_to_json()
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# @todo throw custom exception
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def sync_to_json(self):
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with open('/datastore/url-watches.json', 'w') as json_file:
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json.dump(self.data, json_file, indent=4)
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# body of the constructor
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