moviewyrm/fedireads/books_manager.py

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''' select and call a connector for whatever book task needs doing '''
import importlib
from fedireads import models
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from fedireads.tasks import app
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def get_or_create_book(key):
''' pull up a book record by whatever means possible '''
try:
book = models.Book.objects.select_subclasses().get(
fedireads_key=key
)
return book
except models.Book.DoesNotExist:
pass
connector = get_connector()
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book = connector.get_or_create_book(key)
load_more_data.delay(book.id)
return book
@app.task
def load_more_data(book_id):
''' background the work of getting all 10,000 editions of LoTR '''
book = models.Book.objects.select_subclasses().get(id=book_id)
connector = get_connector(book)
connector.expand_book_data(book)
def search(query, first=False):
''' find books based on arbitary keywords '''
results = []
for connector in get_connectors():
result = connector.search(query)
if first and result:
return result[0]
results.append({
'connector': connector,
'results': result,
})
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return results
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def update_book(book):
''' re-sync with the original data source '''
connector = get_connector(book)
connector.update_book(book)
def get_connectors():
''' load all connectors '''
connectors_info = models.Connector.objects.order_by('priority').all()
return [load_connector(c) for c in connectors_info]
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def get_connector(book=None):
''' pick a book data connector '''
if book and book.connector:
connector_info = book.connector
else:
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# only select from external connectors
connector_info = models.Connector.objects.filter(
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local=False
).order_by('priority').first()
return load_connector(connector_info)
def load_connector(connector_info):
''' instantiate the connector class '''
connector = importlib.import_module(
'fedireads.connectors.%s' % connector_info.connector_file
)
return connector.Connector(connector_info.identifier)