stov/lib_stov/subscription.py

#
#   This file is part of stov, written by Helmut Pozimski 2012-2017.
#
#   stov is free software: you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, version 2 of the License.
#
#   stov is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with stov.  If not, see <http://www.gnu.org/licenses/>.


# -*- coding: utf8 -*-

"""This module takes care of managing subscriptions."""

import logging

from lib_stov import stov_exceptions
from lib_stov import yt_noapi
from lib_stov import zdf_mediathek
from lib_stov import twitch
from lib_stov import configuration

LOGGER = logging.getLogger("stov")


class Sub(object):
    """This class constructs a object that stores all the attributes that define
    a subscription and performs the necessary operations on it.
    """
    def __init__(self, subscription_type, name, site, search="",
                 subscription_id=0, title="", directory="", disabled=0):
        self._id = subscription_id
        self._title = title
        self._type = subscription_type
        self._name = name
        self._search = search
        self._directory = directory
        self._conf = configuration.Conf.get_instance()
        self.site = site
        self.downloaded_videos = []
        self.failed_videos_count = 0
        self.failed_videos = []
        self.to_delete = []
        self._video_list = []
        self._id_list = []
        self.parsed_response = None

        if int(disabled) == 0:
            self.disabled = False
        elif int(disabled) == 1:
            self.disabled = True

        if site == "youtube":
            self._connector = yt_noapi.Connector(self._type, self._name,
                                                 self._search)
        elif site == "zdf_mediathek":
            self._connector = zdf_mediathek.Connector(self._type, self._name,
                                                      self._search)
        elif site == "twitch":
            self._connector = twitch.Connector(self._type, self._name,
                                               self._search)
        else:
            raise stov_exceptions.SiteUnsupported()

    def get_title(self):
        """Returns the title attribute."""
        return self._title

    def get_id(self):
        """Returns the id attribute."""
        return self._id

    def set_id(self, subscription_id):
        """Sets the ID attribute."""
        self._id = subscription_id

    def check_string_match(self, video):
        """Checks if the subscription is enabled and the video matches the
        search string defined for the subscription"""
        if not self.disabled:
            LOGGER.debug(_("Matching parameter %s with title %s"),
                         self._search, video.title)
            if self._search != "" and self._conf.values["check_title"]\
                    == "yes":
                return self._search in video.title
            else:
                return self._search.lower() in video.title.lower()
        else:
            return False

    def gather_videos(self, video_list):
        """Gathers all videos in the subscription and saves
        them in an the internal list so they can be accessed by the object
        """
        self._video_list = video_list

    def download_videos(self):
        """Uses the DownloadVideo method of the video object to download all
        videos contained in the subscription and adds them to the list of
        downloaded videos if the download succeeds.

        """
        if not self.disabled:
            itag_value = self._connector.get_quality_parameter(self._conf)
            for video in self._video_list:
                if video.downloaded == 0:
                    video_url = self._connector.construct_video_url(
                        video.site_id)
                    if video.download_video(self._directory, itag_value,
                                            video_url):
                        self.downloaded_videos.append(video)
                    else:
                        self.failed_videos_count += 1
                        self.failed_videos.append(video)
        else:
            raise stov_exceptions.SubscriptionDisabledException(self._title)

    def print_videos(self):
        """Prepares a human readable list of all videos contained
        in the subscription.

        """
        video_list = []
        for i in self._video_list:
            if i.downloaded == 0:
                video_list.append(i.title + _("   (pending)"))
            elif i.downloaded == 1:
                video_list.append(i.title + _("   (downloaded)"))
            elif i.downloaded == -1:
                video_list.append(i.title + _("   (failed)"))
        return video_list

    def add_sub(self):
        """Adds a new subscription to the database"""
        parsed_response = self._connector.parse_api_data([])
        self._title = parsed_response.title
        self._type = parsed_response.type
        if self._type == "channel" or self._type == "playlist":
            self._directory = self._title.replace(" ", "_")
        else:
            self._directory = self._name + "_" + \
                              self._search.replace(" ", "_")
        data = (self._title, self._type, self._search, self._directory,
                self._name, 0, self.site)
        return data

    def check_and_delete(self, videos):
        """Checks if a video still exists in the current API response and
        deletes it if it doesn't

        """
        parsed_response = self._connector.parse_api_data([])
        self._type = parsed_response.type
        self.gather_videos(videos)
        for entry in parsed_response.videos:
            self._id_list.append(entry.video_id)
        for item in self._video_list:
            if item.site_id not in self._id_list:
                self.to_delete.append(item)

    def update_data(self):
        """Updates the data from the API."""
        self.parsed_response = self._connector.parse_api_data(self._video_list)