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import logging
from typing import List
from peewee import SqliteDatabase, DoesNotExist
from cozy.application_settings import ApplicationSettings
from cozy.architecture.event_sender import EventSender
from cozy.architecture.observable import Observable
from cozy.architecture.profiler import timing
from cozy.db.collation import collate_natural
from cozy.db.book import Book as BookModel
from cozy.db.track import Track as TrackModel
from cozy.db.track_to_file import TrackToFile
import inject
from cozy.model.chapter import Chapter
from cozy.model.settings import Settings
from cozy.model.track import Track, TrackInconsistentData
log = logging.getLogger("BookModel")
class BookIsEmpty(Exception):
pass
class Book(Observable, EventSender):
_chapters: List[Chapter] = None
_settings: Settings = inject.attr(Settings)
_app_settings: ApplicationSettings = inject.attr(ApplicationSettings)
def __init__(self, db: SqliteDatabase, book: BookModel):
super().__init__()
super(Observable, self).__init__()
self._db: SqliteDatabase = db
self.id: int = book.id
self._db_object: BookModel = book
if TrackModel.select().where(TrackModel.book == self._db_object).count() < 1:
raise BookIsEmpty
@property
def name(self):
return self._db_object.name
@name.setter
def name(self, new_name: str):
self._db_object.name = new_name
self._db_object.save(
@property
def author(self):
if not self._app_settings.swap_author_reader:
return self._db_object.author
else:
return self._db_object.reader
@author.setter
def author(self, new_author: str):
if not self._app_settings.swap_author_reader:
self._db_object.author = new_author
else:
self._db_object.reader = new_author
self._db_object.save(
@property
def reader(self):
if not self._app_settings.swap_author_reader:
return self._db_object.reader
else:
return self._db_object.author
@reader.setter
def reader(self, new_reader: str):
if not self._app_settings.swap_author_reader:
self._db_object.reader = new_reader
else:
self._db_object.author = new_reader
self._db_object.save(
@property
def position(self) -> int:
return self._db_object.position
@position.setter
def position(self, new_position: int):
self._db_object.position = new_position
self._db_object.save(
self._notify("position")
self._notify("current_chapter")
@property
def rating(self):
return self._db_object.rating
@rating.setter
def rating(self, new_rating: int):
self._db_object.rating = new_rating
self._db_object.save(
@property
def cover(self):
return self._db_object.cover
@cover.setter
def cover(self, new_cover: bytes):
self._db_object.cover = new_cover
self._db_object.save(
@property
def playback_speed(self):
return self._db_object.playback_speed
@playback_speed.setter
def playback_speed(self, new_playback_speed: float):
self._db_object.playback_speed = new_playback_speed
self._db_object.save(
self._notify("playback_speed")
@property
def last_played(self):
return self._db_object.last_played
@last_played.setter
def last_played(self, new_last_played: int):
self._db_object.last_played = new_last_played
self._db_object.save(
self._notify("last_played")
@property
def offline(self):
return self._db_object.offline
@offline.setter
def offline(self, new_offline: bool):
self._db_object.offline = new_offline
self._db_object.save(
@property
def downloaded(self):
return self._db_object.downloaded
@downloaded.setter
def downloaded(self, new_downloaded: bool):
self._db_object.downloaded = new_downloaded
self._db_object.save(
@property
def chapters(self):
if not self._chapters:
self._fetch_chapters()
return self._chapters
@property
def current_chapter(self):
return next((chapter for chapter in self.chapters if chapter.id == self.position), self.chapters[0])
@property
def duration(self):
return sum((chapter.length for chapter in self.chapters))
@property
def progress(self):
progress = 0
if self.position == 0:
return 0
elif self.position == -1:
return self.duration
for chapter in self.chapters:
if chapter.id == self.position:
relative_position = max(chapter.position - chapter.start_position, 0)
progress += int(relative_position / 1000000000)
return progress
progress += chapter.length
return progress
def remove(self):
if self._settings.last_played_book and self._settings.last_played_book.id == self._db_object.id:
self._settings.last_played_book = None
book_tracks = [TrackModel.get_by_id(chapter.id) for chapter in self.chapters]
track_to_files = TrackToFile.select().join(TrackModel).where(TrackToFile.track << book_tracks)
for track in track_to_files:
try:
track.file.delete_instance(recursive=True)
except DoesNotExist:
track.delete_instance()
for track in book_tracks:
track.delete_instance(recursive=True)
self._db_object.delete_instance(recursive=True)
self.destroy_listeners()
self._destroy_observers()
def _fetch_chapters(self):
tracks = TrackModel \
.select() \
.where(TrackModel.book == self._db_object) \
.order_by(TrackModel.disk, TrackModel.number, collate_natural.collation(TrackModel.name))
self._chapters = []
for track in tracks:
try:
track_model = Track(self._db, track)
self._chapters.append(track_model)
except TrackInconsistentData:
log.warning("Skipping inconsistent model")
except Exception as e:
log.error("Could not create chapter object: %s", e)
for chapter in self._chapters:
chapter.add_listener(self._on_chapter_event)
def _on_chapter_event(self, event: str, chapter: Chapter):
if event == "chapter-deleted":
try:
self.chapters.remove(chapter)
except ValueError:
pass
if len(self._chapters) < 1:
if self._settings.last_played_book and self._settings.last_played_book.id == self._db_object.id:
self._settings.last_played_book = None
self._db_object.delete_instance(recursive=True)
self.emit_event("book-deleted", self)
self.destroy_listeners()
self._destroy_observers()
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