forked from mirrors/bookwyrm
120 lines
3.5 KiB
Python
120 lines
3.5 KiB
Python
''' select and call a connector for whatever book task needs doing '''
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from requests import HTTPError
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import importlib
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from urllib.parse import urlparse
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from fedireads import models
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from fedireads.tasks import app
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def get_edition(book_id):
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''' look up a book in the db and return an edition '''
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book = models.Book.objects.select_subclasses().get(id=book_id)
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if isinstance(book, models.Work):
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book = book.default_edition
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return book
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def get_or_create_book(remote_id):
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''' pull up a book record by whatever means possible '''
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book = models.Book.objects.select_subclasses().filter(
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remote_id=remote_id
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).first()
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if book:
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return book
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connector = get_or_create_connector(remote_id)
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book = connector.get_or_create_book(remote_id)
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load_more_data.delay(book.id)
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return book
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def get_or_create_connector(remote_id):
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''' get the connector related to the author's server '''
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url = urlparse(remote_id)
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identifier = url.netloc
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if not identifier:
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raise ValueError('Invalid remote id')
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try:
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connector_info = models.Connector.objects.get(identifier=identifier)
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except models.Connector.DoesNotExist:
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connector_info = models.Connector.objects.create(
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identifier=identifier,
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connector_file='fedireads_connector',
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base_url='https://%s' % identifier,
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books_url='https://%s/book' % identifier,
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covers_url='https://%s/images/covers' % identifier,
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search_url='https://%s/search?q=' % identifier,
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priority=3
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)
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return load_connector(connector_info)
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@app.task
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def load_more_data(book_id):
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''' background the work of getting all 10,000 editions of LoTR '''
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book = models.Book.objects.select_subclasses().get(id=book_id)
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connector = load_connector(book.connector)
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connector.expand_book_data(book)
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def search(query):
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''' find books based on arbitary keywords '''
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results = []
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dedup_slug = lambda r: '%s/%s/%s' % (r.title, r.author, r.year)
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result_index = set()
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for connector in get_connectors():
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try:
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result_set = connector.search(query)
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except HTTPError:
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continue
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result_set = [r for r in result_set \
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if dedup_slug(r) not in result_index]
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# `|=` concats two sets. WE ARE GETTING FANCY HERE
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result_index |= set(dedup_slug(r) for r in result_set)
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results.append({
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'connector': connector,
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'results': result_set,
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})
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return results
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def local_search(query):
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''' only look at local search results '''
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connector = load_connector(models.Connector.objects.get(local=True))
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return connector.search(query)
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def first_search_result(query):
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''' search until you find a result that fits '''
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for connector in get_connectors():
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result = connector.search(query)
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if result:
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return result[0]
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return None
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def update_book(book, data=None):
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''' re-sync with the original data source '''
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connector = load_connector(book.connector)
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connector.update_book(book, data=data)
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def get_connectors():
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''' load all connectors '''
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for info in models.Connector.objects.order_by('priority').all():
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yield load_connector(info)
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def load_connector(connector_info):
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''' instantiate the connector class '''
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connector = importlib.import_module(
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'fedireads.connectors.%s' % connector_info.connector_file
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)
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return connector.Connector(connector_info.identifier)
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