moviewyrm/fedireads/connectors/abstract_connector.py

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''' functionality outline for a book data connector '''
from abc import ABC, abstractmethod
from fedireads import models
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class AbstractConnector(ABC):
''' generic book data connector '''
def __init__(self, identifier):
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# load connector settings
info = models.Connector.objects.get(identifier=identifier)
self.model = info
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self.url = info.base_url
self.covers_url = info.covers_url
self.search_url = info.search_url
self.key_name = info.key_name
self.max_query_count = info.max_query_count
def is_available(self):
''' check if you're allowed to use this connector '''
if self.model.max_query_count is not None:
if self.model.query_count >= self.model.max_query_count:
return False
return True
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@abstractmethod
def search(self, query):
''' free text search '''
# return list of search result objs
pass
@abstractmethod
def get_or_create_book(self, book_id):
''' request and format a book given an identifier '''
# return book model obj
pass
@abstractmethod
def get_or_create_author(self, book_id):
''' request and format a book given an identifier '''
# return book model obj
pass
@abstractmethod
def update_book(self, book_obj):
''' sync a book with the canonical remote copy '''
# return book model obj
pass
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def update_from_mappings(obj, data, mappings):
''' assign data to model with mappings '''
noop = lambda x: x
for (key, value) in data.items():
formatter = None
if key in mappings:
key, formatter = mappings[key]
if not formatter:
formatter = noop
if has_attr(obj, key):
obj.__setattr__(key, formatter(value))
return obj
def has_attr(obj, key):
''' helper function to check if a model object has a key '''
try:
return hasattr(obj, key)
except ValueError:
return False
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class SearchResult(object):
''' standardized search result object '''
def __init__(self, title, key, author, year, raw_data):
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self.title = title
self.key = key
self.author = author
self.year = year
self.raw_data = raw_data
def __repr__(self):
return "<SearchResult key={!r} title={!r} author={!r}>".format(
self.key, self.title, self.author)
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