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https://github.com/janeczku/calibre-web
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Chunked sync
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cps/kobo.py
86
cps/kobo.py
@ -43,6 +43,7 @@ from flask_login import current_user
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from werkzeug.datastructures import Headers
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from sqlalchemy import func
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from sqlalchemy.sql.expression import and_, or_
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from sqlalchemy.orm import load_only
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from sqlalchemy.exc import StatementError
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import requests
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@ -56,6 +57,8 @@ KOBO_FORMATS = {"KEPUB": ["KEPUB"], "EPUB": ["EPUB3", "EPUB"]}
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KOBO_STOREAPI_URL = "https://storeapi.kobo.com"
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KOBO_IMAGEHOST_URL = "https://kbimages1-a.akamaihd.net"
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SYNC_ITEM_LIMIT = 5
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kobo = Blueprint("kobo", __name__, url_prefix="/kobo/<auth_token>")
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kobo_auth.disable_failed_auth_redirect_for_blueprint(kobo)
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kobo_auth.register_url_value_preprocessor(kobo)
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@ -142,68 +145,70 @@ def HandleSyncRequest():
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new_books_last_modified = sync_token.books_last_modified
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new_books_last_created = sync_token.books_last_created
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new_reading_state_last_modified = sync_token.reading_state_last_modified
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new_archived_last_modified = datetime.datetime.min
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sync_results = []
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# We reload the book database so that the user get's a fresh view of the library
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# in case of external changes (e.g: adding a book through Calibre).
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calibre_db.reconnect_db(config, ub.app_DB_path)
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archived_books = (
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ub.session.query(ub.ArchivedBook)
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.filter(ub.ArchivedBook.user_id == int(current_user.id))
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.all()
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)
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# We join-in books that have had their Archived bit recently modified in order to either:
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# * Restore them to the user's device.
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# * Delete them from the user's device.
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# (Ideally we would use a join for this logic, however cross-database joins don't look trivial in SqlAlchemy.)
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recently_restored_or_archived_books = []
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archived_book_ids = {}
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new_archived_last_modified = datetime.datetime.min
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for archived_book in archived_books:
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if archived_book.last_modified > sync_token.archive_last_modified:
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recently_restored_or_archived_books.append(archived_book.book_id)
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if archived_book.is_archived:
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archived_book_ids[archived_book.book_id] = True
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new_archived_last_modified = max(
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new_archived_last_modified, archived_book.last_modified)
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# sqlite gives unexpected results when performing the last_modified comparison without the datetime cast.
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# It looks like it's treating the db.Books.last_modified field as a string and may fail
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# the comparison because of the +00:00 suffix.
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changed_entries = (
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calibre_db.session.query(db.Books)
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.join(db.Data)
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.filter(or_(func.datetime(db.Books.last_modified) > sync_token.books_last_modified,
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db.Books.id.in_(recently_restored_or_archived_books)))
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calibre_db.session.query(db.Books, ub.ArchivedBook.last_modified, ub.ArchivedBook.is_archived)
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.join(db.Data).outerjoin(ub.ArchivedBook, db.Books.id == ub.ArchivedBook.book_id)
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.filter(db.Books.last_modified >= sync_token.books_last_modified)
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.filter(db.Books.id>sync_token.books_last_id)
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.filter(db.Data.format.in_(KOBO_FORMATS))
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.all()
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# .filter(ub.ArchivedBook.is_archived == 0)
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.order_by(db.Books.last_modified)
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.order_by(db.Books.id)
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.limit(SYNC_ITEM_LIMIT)
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)
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reading_states_in_new_entitlements = []
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for book in changed_entries:
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kobo_reading_state = get_or_create_reading_state(book.id)
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kobo_reading_state = get_or_create_reading_state(book.Books.id)
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entitlement = {
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"BookEntitlement": create_book_entitlement(book, archived=(book.id in archived_book_ids)),
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"BookMetadata": get_metadata(book),
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"BookEntitlement": create_book_entitlement(book.Books, archived=(book.is_archived == True)),
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"BookMetadata": get_metadata(book.Books),
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}
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if kobo_reading_state.last_modified > sync_token.reading_state_last_modified:
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entitlement["ReadingState"] = get_kobo_reading_state_response(book, kobo_reading_state)
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entitlement["ReadingState"] = get_kobo_reading_state_response(book.Books, kobo_reading_state)
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new_reading_state_last_modified = max(new_reading_state_last_modified, kobo_reading_state.last_modified)
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reading_states_in_new_entitlements.append(book.id)
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reading_states_in_new_entitlements.append(book.Books.id)
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if book.timestamp > sync_token.books_last_created:
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if book.Books.timestamp > sync_token.books_last_created:
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sync_results.append({"NewEntitlement": entitlement})
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else:
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sync_results.append({"ChangedEntitlement": entitlement})
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new_books_last_modified = max(
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book.last_modified, new_books_last_modified
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book.Books.last_modified, new_books_last_modified
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)
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new_books_last_created = max(book.timestamp, new_books_last_created)
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new_books_last_created = max(book.Books.timestamp, new_books_last_created)
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max_change = (changed_entries
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.from_self()
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.filter(ub.ArchivedBook.is_archived)
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.order_by(func.datetime(ub.ArchivedBook.last_modified).desc())
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.first()
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)
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if max_change:
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max_change = max_change.last_modified
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else:
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max_change = new_archived_last_modified
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new_archived_last_modified = max(new_archived_last_modified, max_change)
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# no. of books returned
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book_count = changed_entries.count()
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# last entry:
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if book_count:
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books_last_id = changed_entries.all()[-1].Books.id or -1
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else:
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books_last_id = -1
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# generate reading state data
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changed_reading_states = (
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ub.session.query(ub.KoboReadingState)
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.filter(and_(func.datetime(ub.KoboReadingState.last_modified) > sync_token.reading_state_last_modified,
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@ -225,11 +230,12 @@ def HandleSyncRequest():
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sync_token.books_last_modified = new_books_last_modified
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sync_token.archive_last_modified = new_archived_last_modified
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sync_token.reading_state_last_modified = new_reading_state_last_modified
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sync_token.books_last_id = books_last_id
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return generate_sync_response(sync_token, sync_results)
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return generate_sync_response(sync_token, sync_results, book_count)
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def generate_sync_response(sync_token, sync_results):
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def generate_sync_response(sync_token, sync_results, set_cont=False):
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extra_headers = {}
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if config.config_kobo_proxy:
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# Merge in sync results from the official Kobo store.
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@ -245,6 +251,8 @@ def generate_sync_response(sync_token, sync_results):
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except Exception as e:
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log.error("Failed to receive or parse response from Kobo's sync endpoint: " + str(e))
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if set_cont:
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extra_headers["x-kobo-sync"] = "continue"
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sync_token.to_headers(extra_headers)
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response = make_response(jsonify(sync_results), extra_headers)
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@ -85,6 +85,7 @@ class SyncToken:
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"archive_last_modified": {"type": "string"},
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"reading_state_last_modified": {"type": "string"},
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"tags_last_modified": {"type": "string"},
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"books_last_id": {"type": "integer", "optional": True}
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},
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}
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@ -96,6 +97,7 @@ class SyncToken:
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archive_last_modified=datetime.min,
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reading_state_last_modified=datetime.min,
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tags_last_modified=datetime.min,
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books_last_id=-1
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):
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self.raw_kobo_store_token = raw_kobo_store_token
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self.books_last_created = books_last_created
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@ -103,6 +105,7 @@ class SyncToken:
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self.archive_last_modified = archive_last_modified
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self.reading_state_last_modified = reading_state_last_modified
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self.tags_last_modified = tags_last_modified
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self.books_last_id = books_last_id
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@staticmethod
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def from_headers(headers):
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@ -137,6 +140,7 @@ class SyncToken:
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archive_last_modified = get_datetime_from_json(data_json, "archive_last_modified")
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reading_state_last_modified = get_datetime_from_json(data_json, "reading_state_last_modified")
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tags_last_modified = get_datetime_from_json(data_json, "tags_last_modified")
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books_last_id = data_json["books_last_id"]
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except TypeError:
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log.error("SyncToken timestamps don't parse to a datetime.")
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return SyncToken(raw_kobo_store_token=raw_kobo_store_token)
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@ -147,7 +151,8 @@ class SyncToken:
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books_last_modified=books_last_modified,
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archive_last_modified=archive_last_modified,
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reading_state_last_modified=reading_state_last_modified,
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tags_last_modified=tags_last_modified
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tags_last_modified=tags_last_modified,
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books_last_id=books_last_id
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)
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def set_kobo_store_header(self, store_headers):
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@ -170,7 +175,8 @@ class SyncToken:
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"books_last_created": to_epoch_timestamp(self.books_last_created),
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"archive_last_modified": to_epoch_timestamp(self.archive_last_modified),
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"reading_state_last_modified": to_epoch_timestamp(self.reading_state_last_modified),
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"tags_last_modified": to_epoch_timestamp(self.tags_last_modified)
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"tags_last_modified": to_epoch_timestamp(self.tags_last_modified),
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"books_last_id":self.books_last_id
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},
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}
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return b64encode_json(token)
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