broadcasts.py 28.4 KB
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#
#  engine
#
#  Playout Daemon for autoradio project
#
#
#  Copyright (C) 2017-2018 Gottfried Gaisbauer <gottfried.gaisbauer@servus.at>
#
#  This file is part of engine.
#
#  engine 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, either version 3 of the License, or
#  any later version.
#
#  engine 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 engine. If not, see <http://www.gnu.org/licenses/>.
#
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import sys
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import time
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import logging
import datetime
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from sqlalchemy import orm, func, BigInteger, Boolean, Column, DateTime, Integer, String, ForeignKey, ForeignKeyConstraint
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from sqlalchemy.orm import relationship
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from sqlalchemy.sql.expression import false, true
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from sqlalchemy.ext.hybrid import hybrid_property, hybrid_method
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from sqlalchemy.orm import relationship
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from sqlalchemy import create_engine

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from libraries.enum.auraenumerations import ScheduleEntryType
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from aura import DB
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class AuraDatabaseModel():
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    logger = None

    def __init__(self):
        self.logger = logging.getLogger("AuraEngine")

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    def store(self, add=False, commit=False):
        if add:
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            DB.session.add(self)
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        if commit:
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            DB.session.commit()
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    def delete(self, commit=False):
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        DB.session.delete(self)
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#        current_db_sessions = DB.session.object_session(self)
#        current_db_sessions.delete(self)
#        return
#        DB.session.delete(self)
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        if commit:
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            DB.session.commit()
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    def _asdict(self):
        return self.__dict__
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    @staticmethod
    def recreate_db(systemexit = False):
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        manualschedule = Schedule()
        manualschedule.schedule_id = 0
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        manualschedule.show_name = "Manual Show"
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#        self.logger.debug("Recreating Database...")
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        DB.drop_all()
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#        self.logger.debug("all dropped. creating...")
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        DB.create_all()
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#        self.logger.debug("inserting manual scheduling possibility and fallback trackservice schedule")
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#        DB.session.add(manualschedule)
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#        db.session.add(fallback_trackservice_schedule)
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#        self.logger.debug("all created. commiting...")
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        DB.session.commit()
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#        self.logger.debug("Database recreated!")
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        if systemexit:
            sys.exit(0)
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# ------------------------------------------------------------------------------------------ #
# class Schedule(DB.Model, AuraDatabaseModel):
#     """
#     One specific Schedule for a show on a timeslot
#     """
#     __tablename__ = 'schedule'
#
#     # primary and foreign keys
#     schedule_start = Column(DateTime, primary_key=True)
#
#     schedule_end = Column(DateTime)
#     schedule_id = Column(Integer) #, primary_key=True, autoincrement=False)
#     show_id = Column(Integer)  # well, in fact not needed..
#     show_name = Column(String(256))
#     show_hosts = Column(String(256))
#     funding_category = Column(String(256))
#     comment = Column(String(512))
#     languages = Column(String(256))
#     type = Column(String(256))
#     category = Column(String(256))
#     topic = Column(String(256))
#     musicfocus = Column(String(256))
#
#     is_repetition = Column(Boolean())
#
#     playlist_id = Column(Integer, ForeignKey("playlist.playlist_id"))
#     timeslot_fallback_id = Column(Integer)
#     show_fallback_id = Column(Integer)
#     station_fallback_id = Column(Integer)
#
#     playlist = relationship("Playlist", foreign_keys=[playlist_id], lazy="joined")
#  #    timeslot_fallback = relationship("Playlist", foreign_keys=[timeslot_fallback_id], lazy="joined")
#  #    show_fallback = relationship("Playlist", foreign_keys=[show_fallback_id], lazy="joined")
#  #    station_fallback = relationship("Playlist", foreign_keys=[station_fallback_id], lazy="joined")
#
#     @staticmethod
#     def select_all():
#          # fetching all entries
#         all_entries = DB.session.query(Schedule).filter().order_by(Schedule.schedule_start).all()
#         return all_entries
#
#     @staticmethod
#     def select_by_id(id):
#         entry = DB.session.query(Schedule).filter(Schedule.schedule_id == id).first()
#         return entry
#     @staticmethod
#     def select_act_programme():
#          #DB.session.query(Schedule).filter
#          # fetching all from today to ..
#         today = datetime.date.today()
#         all_entries = DB.session.query(Schedule).filter(Schedule.schedule_start >= today).order_by(Schedule.schedule_start).all()
#
#         return all_entries
#

#
#     @staticmethod
#     def drop_the_future(timedelta):
#         then = datetime.datetime.now() + timedelta
#
#         # is this really necessary?
#         future_entries = DB.session.query(Schedule).filter(Schedule.schedule_start > then)
#         for e in future_entries:
#             e.delete()
#         DB.session.commit()
#
#     def get_length(self):
#         sec1 = int(datetime.datetime.strptime(self.start[0:16].replace(" ", "T"), "%Y-%m-%dT%H:%M").strftime("%s"))
#         sec2 = int(datetime.datetime.strptime(self.end[0:16].replace(" ", "T"), "%Y-%m-%dT%H:%M").strftime("%s"))
#         len = sec2 - sec1
#         return len
#
#     # ------------------------------------------------------------------------------------------ #
#     def __str__(self):
#         return "ScheduleID: #" + str(self.schedule_id) + " Showname: " + self.show_name + " starts @ " + str(self.schedule_start)

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# ------------------------------------------------------------------------------------------ #
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class Schedule(DB.Model, AuraDatabaseModel):
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    """
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    One specific Schedule for a show on a timeslot
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    """
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    __tablename__ = 'schedule'
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    # primary and foreign keys
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    schedule_start = Column(DateTime, primary_key=True)
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    schedule_end = Column(DateTime)
    schedule_id = Column(Integer) #, primary_key=True, autoincrement=False)
    show_id = Column(Integer)  # well, in fact not needed..
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    show_name = Column(String(256))
    show_hosts = Column(String(256))
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    funding_category = Column(String(256))
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    comment = Column(String(512))
    languages = Column(String(256))
    type = Column(String(256))
    category = Column(String(256))
    topic = Column(String(256))
    musicfocus = Column(String(256))
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    is_repetition = Column(Boolean())

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    playlist_id = Column(Integer) #, ForeignKey("playlist.playlist_id"))
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    timeslot_fallback_id = Column(Integer)
    show_fallback_id = Column(Integer)
    station_fallback_id = Column(Integer)

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    playlist = relationship("Playlist",
                            primaryjoin="and_(Schedule.schedule_start==Playlist.schedule_start, Schedule.playlist_id==Playlist.playlist_id, Schedule.show_name==Playlist.show_name)",
                            back_populates="schedule")
    timeslot_fallback = relationship("Playlist",
                            primaryjoin="and_(Schedule.schedule_start==Playlist.schedule_start, Schedule.timeslot_fallback_id==Playlist.playlist_id, Schedule.show_name==Playlist.show_name)",
                            back_populates="schedule")
    show_fallback = relationship("Playlist",
                            primaryjoin="and_(Schedule.schedule_start==Playlist.schedule_start, Schedule.show_fallback_id==Playlist.playlist_id, Schedule.show_name==Playlist.show_name)",
                            back_populates="schedule")
    station_fallback = relationship("Playlist",
                            primaryjoin="and_(Schedule.schedule_start==Playlist.schedule_start, Schedule.station_fallback_id==Playlist.playlist_id, Schedule.show_name==Playlist.show_name)",
                            back_populates="schedule")
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    @staticmethod
    def select_show_on_datetime(datetime):
        return DB.session.query(Schedule).filter(Schedule.schedule_start == datetime).first()

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    @staticmethod
    def select_act_programme():
        #DB.session.query(Schedule).filter
        # fetching all from today to ..
        today = datetime.date.today()
        all_entries = DB.session.query(Schedule).filter(Schedule.schedule_start >= today).order_by(Schedule.schedule_start).all()

        return all_entries

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    def __str__(self):
        """
        String representation of the object.
        """
        return "ID#%s [Show: %s, ShowID: %s]" % (str(self.schedule_id), self.show_name, str(self.show_id))

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# ------------------------------------------------------------------------------------------ #
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class Playlist(DB.Model, AuraDatabaseModel):
    __tablename__ = 'playlist'

    # pk,fk
    artificial_id = Column(Integer, primary_key=True)
    schedule_start = Column(DateTime, ForeignKey("schedule.schedule_start"))
    # relationships
    schedule = relationship("Schedule", uselist=False, back_populates="playlist")
    entries = relationship("PlaylistEntry", back_populates="playlist")
    # data
    playlist_id = Column(Integer, autoincrement=False)  # , ForeignKey("schedule.playlist_id"))
    show_name = Column(String(256))
    fallback_type = Column(Integer)
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    entry_count = Column(Integer)    
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    @staticmethod
    def select_all():
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        # fetching all entries
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        all_entries = DB.session.query(Playlist).filter(Playlist.fallback_type == 0).all()
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        cnt = 0
        for entry in all_entries:
            entry.programme_index = cnt
            cnt = cnt + 1

        return all_entries

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    @staticmethod
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    def select_playlist_for_schedule(datetime, playlist_id):
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        """
        Retrieves the playlist for the given schedule identified by `start_date` and `playlist_id`

        Args:
            start_date (datetime):  Date and time when the playlist is scheduled
            playlist_id (Integer):  The ID of the playlist

        Returns:
            (Playlist):             The playlist, if existing for schedule

        Raises:
            Exception:              In case there a inconsistent database state, such es multiple playlists for given date/time.
        """
        playlists = DB.session.query(Playlist).filter(Playlist.schedule_start == datetime and Playlist.playlist_id == playlist_id).all()
        if playlists and len(playlists) > 1:
            raise Exception("Inconsistent Database State: Multiple playlists for given schedule '%s' and playlist id#%d available!" % (str(datetime), playlist_id))
        if not playlists:
            return None
        return playlists[0]

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    @staticmethod
    def select_playlist(playlist_id):
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        """
        Retrieves all paylists for that given playlist ID.

        Args:
            playlist_id (Integer):  The ID of the playlist
        
        Returns:
            (Array<Playlist>):      An array holding the playlists
        """
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        return DB.session.query(Playlist).filter(Playlist.playlist_id == playlist_id).order_by(Playlist.schedule_start).all()
    
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    @hybrid_property
    def start_unix(self):
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        """
        Start time of the playlist in UNIX time.
        """
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        return time.mktime(self.schedule_start.timetuple())

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    @hybrid_property
    def end_unix(self):
        """
        End time of the playlist in UNIX time.
        """
        return time.mktime(self.schedule_start.timetuple()) + self.duration


    @hybrid_property
    def duration(self):
        """
        Returns the total length of the playlist in seconds.

        Returns:
            (Integer):  Length in seconds
        """
        total = 0

        for entry in self.entries:
            total += entry.duration
        return total


    def __str__(self):
        """
        String representation of the object.
        """
        time_start = self.fmt_time(self.start_unix)
        time_end = self.fmt_time(self.end_unix)
        return "ID#%s [items: %s, start: %s, end: %s]" % (str(self.playlist_id), str(self.entry_count), str(time_start), str(time_end))


    def fmt_time(self, timestamp):
        return datetime.datetime.fromtimestamp(timestamp).strftime('%H:%M:%S')

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# ------------------------------------------------------------------------------------------ #
class PlaylistEntry(DB.Model, AuraDatabaseModel):
    __tablename__ = 'playlist_entry'
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    # primary keys
    artificial_id = Column(Integer, primary_key=True)
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    # foreign keys
    artificial_playlist_id = Column(Integer, ForeignKey("playlist.artificial_id"))
    entry_num = Column(Integer) # , primary_key=True)
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    uri = Column(String(1024))
    duration = Column(BigInteger)
    filename = Column(String(1024))
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    entry_start = Column(DateTime)
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    # relationships
    playlist = relationship("Playlist", uselist=False, back_populates="entries")
    meta_data = relationship("PlaylistEntryMetaData", back_populates="entry")
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    @staticmethod
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    def select_playlistentry_for_playlist(artificial_playlist_id, entry_num):
        return DB.session.query(PlaylistEntry).filter(PlaylistEntry.artificial_playlist_id == artificial_playlist_id, PlaylistEntry.entry_num == entry_num).first()
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    @hybrid_property
    def start_unix(self):
        return time.mktime(self.entry_start.timetuple())

    @hybrid_property
    def end_unix(self):
        return time.mktime(self.entry_start.timetuple()) + self.duration
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    @hybrid_property
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    def volume(self):
        return 100
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    @hybrid_property
    def type(self):
        if self.uri.startswith("http"):
            return ScheduleEntryType.STREAM
        if self.uri.startswith("pool") or self.uri.startswith("playlist") or self.uri.startswith("file"):
            return ScheduleEntryType.FILESYSTEM
        if self.uri.startswith("live") or self.uri.startswith("linein"):
            if self.cleansource == "0":
                return ScheduleEntryType.LIVE_0
            elif self.cleansource == "1":
                return ScheduleEntryType.LIVE_1
            elif self.cleansource == "2":
                return ScheduleEntryType.LIVE_2
            elif self.cleansource == "3":
                return ScheduleEntryType.LIVE_3
            elif self.cleansource == "4":
                return ScheduleEntryType.LIVE_4

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    def __str__(self):
        """
        String representation of the object.
        """
        time_start = self.fmt_time(self.start_unix)
        time_end = self.fmt_time(self.end_unix)
        track = self.filename[-15:]
        return "PlaylistEntry ID#%s [%s - %s | %ssec | Track: ...%s]" % (str(self.artificial_id), time_start, time_end, self.duration, track)

    def fmt_time(self, timestamp):
        return datetime.datetime.fromtimestamp(timestamp).strftime('%H:%M:%S')

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# ------------------------------------------------------------------------------------------ #
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class PlaylistEntryMetaData(DB.Model, AuraDatabaseModel):
    __tablename__ = "playlist_entry_metadata"
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    artificial_id = Column(Integer, primary_key=True)
    artificial_entry_id = Column(Integer, ForeignKey("playlist_entry.artificial_id"))
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    artist = Column(String(256))
    title = Column(String(256))
    album = Column(String(256))
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    entry = relationship("PlaylistEntry", uselist=False, back_populates="meta_data")
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    @staticmethod
    def select_metadata_for_entry(artificial_playlistentry_id):
        return DB.session.query(PlaylistEntry).filter(PlaylistEntryMetaData.artificial_entry_id == artificial_playlistentry_id).first()
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# ------------------------------------------------------------------------------------------ #
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#class PlaylistEntry(DB.Model, AuraDatabaseModel):
    # __tablename__ = 'playlist_entry'
    #
    # # primary and foreign keys
    # playlist_id = Column(Integer, ForeignKey("playlist.playlist_id"), primary_key=True, nullable=False, autoincrement=True)
    # entry_num = Column(Integer, primary_key=True, nullable=False, autoincrement=False)
    #
    # uri = Column(String(1024))
    #
    # filename = ""
    # cleansource = ""
    # cleanprotocol = ""
    # type = None
    # fadeintimer = None
    # fadeouttimer = None
    # switchtimer = None
    #
    # meta_data = relationship("PlaylistEntryMetaData", primaryjoin="and_(PlaylistEntry.playlist_id==PlaylistEntryMetaData.playlist_id, PlaylistEntry.entry_num==PlaylistEntryMetaData.entry_num)", lazy="joined")
    #
    # # normal constructor
    # def __init__(self, **kwargs):
    #     super(PlaylistEntry, self).__init__(**kwargs)
    #     self.calc_unix_times()
    #     self.define_clean_source()
    #
    # # constructor like - called from sqlalchemy
    # @orm.reconstructor
    # def reconstructor(self):
    #     self.calc_unix_times()
    #     self.define_clean_source()
    #     self.set_entry_type()
    #
    # def define_clean_source(self):
    #     if self.uri is None:
    #         return None
    #
    #     if self.uri.startswith("http"):
    #         self.cleanprotocol = self.uri[:7]
    #         self.cleansource = self.uri
    #
    #     elif self.uri.startswith("linein"):
    #         self.cleanprotocol = self.uri[:9]
    #         self.cleansource = self.uri[9:]
    #
    #     elif self.uri.startswith("pool") or self.uri.startswith("file") or self.uri.startswith("live"):
    #         self.cleanprotocol = self.uri[:7]
    #         self.cleansource = self.uri[7:]
    #
    #     elif self.uri.startswith("playlist"):
    #         self.cleanprotocol = self.uri[:11]
    #         self.cleansource = self.uri[11:]
    #
    #     else:
    #         self.logger.error("Unknown source protocol")
    #
    # def set_entry_type(self):
    #     if self.uri.startswith("http"):
    #         self.type = ScheduleEntryType.STREAM
    #     if self.uri.startswith("pool") or self.uri.startswith("playlist") or self.uri.startswith("file"):
    #         self.type = ScheduleEntryType.FILESYSTEM
    #     if self.uri.startswith("live") or self.uri.startswith("linein"):
    #         if self.cleansource == "0":
    #             self.type = ScheduleEntryType.LIVE_0
    #         elif self.cleansource == "1":
    #             self.type = ScheduleEntryType.LIVE_1
    #         elif self.cleansource == "2":
    #             self.type = ScheduleEntryType.LIVE_2
    #         elif self.cleansource == "3":
    #             self.type = ScheduleEntryType.LIVE_3
    #         elif self.cleansource == "4":
    #             self.type = ScheduleEntryType.LIVE_4




    # def calc_unix_times(self):
    #     if self.entry_start is not None:
    #         self.entry_start_unix = time.mktime(self.entry_start.timetuple())
    #
    #
    #
    # # ------------------------------------------------------------------------------------------ #
    # @staticmethod
    # def select_all():
    #     # fetching all entries
    #     all_entries = DB.session.query(Playlist).filter(Playlist.fallback_type == 0).order_by(Playlist.entry_start).all()
    #
    #     cnt = 0
    #     for entry in all_entries:
    #         entry.programme_index = cnt
    #         cnt = cnt + 1
    #
    #     return all_entries
    #
    # @staticmethod
    # def select_act_programme(include_act_playing = True):
    #     # fetching all from today to ..
    #     today = datetime.date.today()
    #     all_entries = DB.session.query(Playlist).filter(Playlist.entry_start >= today, Playlist.fallback_type == 0).order_by(Playlist.entry_start).all()
    #
    #     cnt = 0
    #     for entry in all_entries:
    #         entry.programme_index = cnt
    #         cnt = cnt + 1
    #
    #     return all_entries
    #
    # # ------------------------------------------------------------------------------------------ #
    # @staticmethod
    # def truncate():
    #     all_entries = DB.session.query(Playlist).filter().order_by(Playlist.entry_start).all()
    #
    #     for a in all_entries:
    #         a.delete()
    #     DB.session.commit()
    #
    # # ------------------------------------------------------------------------------------------ #
    # @staticmethod
    # def select_next_manual_entry_num():
    #
    #     max_manual_entry_num = DB.session.query(func.max(Playlist.entry_num)).filter(Playlist.schedule_id == 0).first()
    #
    #     if max_manual_entry_num[0] is None:
    #         return 0
    #     else:
    #         return int(max_manual_entry_num[0])+1
    #
    # # ------------------------------------------------------------------------------------------ #
    # @staticmethod
    # def select_upcoming(datefrom=datetime.datetime.now()):
    #     upcomingtracks = DB.session.query(Playlist).filter(Playlist.entry_start > datefrom).order_by(Playlist.entry_start).all()
    #     return upcomingtracks
    #
    # # ------------------------------------------------------------------------------------------ #
    # @staticmethod
    # def select_one(playlist_id, entry_num):
    #     return DB.session.query(Playlist).filter(Playlist.playlist_id == playlist_id, Playlist.entry_num == entry_num).first()
    #
    # # ------------------------------------------------------------------------------------------ #
    # @staticmethod
    # def select_one_playlist_entry_for_show(schedule_id, playlist_type, entry_num):
    #     return DB.session.query(Playlist).filter(Playlist.schedule_id == schedule_id, Playlist.fallback_type == playlist_type, Playlist.entry_num == entry_num).first()
    #
    # # ------------------------------------------------------------------------------------------ #
    # @staticmethod
    # def select_playlist(playlist_id):
    #     return DB.session.query(Playlist).filter(Playlist.playlist_id == playlist_id).order_by(Playlist.entry_start).all()
    #
    # @staticmethod
    # def drop_the_future(timedelta):
    #     then = datetime.datetime.now() + timedelta
    #     #DB.session.delete(ScheduleEntry).filter(ScheduleEntry.entry_start >= then)
    #
    #     # is this really necessary?
    #     future_entries = DB.session.query(Playlist).filter(Playlist.entry_start > then)
    #     for e in future_entries:
    #         e.delete()
    #     DB.session.commit()
    #
    # def getChannel(self):
    #     if self.type == self.type.FILESYSTEM:
    #         return "fs"
    #
    #     if self.type == self.type.LIVE_0 or self.type == self.type.LIVE_1 or self.type == self.type.LIVE_2 or self.type == self.type.LIVE_3 or self.type == self.type.LIVE_4:
    #         return "aura_linein_"+self.cleansource # .cleanprotocol[8]
    #
    #     if self.type == self.type.STREAM:
    #         return "http"
    #
    #
    # # ------------------------------------------------------------------------------------------ #
    # def __str__(self):
    #     return "Showentry starts @ " + str(self.entry_start) + " and plays " + self.source


# class ScheduleEntryFile(DB.Model, AuraDatabaseModel):
#     __tablename__ = 'schedule_entry_file'
#
#     # primary and foreign keys
#     file_id = Column(Integer, primary_key=True, nullable=False, autoincrement=False)
#     playlist_id = Column(Integer) #, ForeignKey("schedule_entry.playlist_id")) # primary_key=True, nullable=False, autoincrement=False)
#     entry_num = Column(Integer) # , ForeignKey("schedule_entry.entry_num")) # primary_key=True, nullable=False, autoincrement=False)
#
#     ForeignKeyConstraint(["playlist_id", "entry_num"], ["schedule_entry.playlist_id", "schedule_entry.entry_num"])
#
#     show = Column(String(512))
#     size = Column(Integer)
#     duration = Column(Integer)
#
# class ScheduleEntryFileMetaData(DB.Model, AuraDatabaseModel):
#     __tablename__ = "schedule_entry_file_metadata"
#
#     metadata_id = Column(Integer, primary_key=True, nullable=False, autoincrement=True)
#     file_id = Column(Integer, ForeignKey("schedule_entry_file.file_id"))
#
#     artist = Column(String(256))
#     title = Column(String(256))
#     album = Column(String(256))
#
# # ------------------------------------------------------------------------------------------ #
# class TrackService(DB.Model, AuraDatabaseModel):
#     __tablename__ = 'trackservice'
#
#     trackservice_id = Column(Integer, primary_key=True, autoincrement=True)
#     schedule_entry_id = Column(Integer, ForeignKey("schedule_entry.id"))
#     playlist_id = Column(Integer, nullable=False)
#     entry_num = Column(Integer, nullable=False)
#
#     source = Column(String(255), nullable=False)
#     start = Column(DateTime, nullable=False, default=func.now())
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#    __table_args__ = (
#        ForeignKeyConstraint(['playlist_id', 'entry_num'], ['schedule_entry.playlist_id', 'schedule_entry.entry_num']),
#    )
#    schedule_entry = relationship("ScheduleEntry", primaryjoin="and_(TrackService.playlist_id==ScheduleEntry.playlist_id, TrackService.entry_num==ScheduleEntry.entry_num)", lazy="joined")
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    #schedule = relationship("Schedule", foreign_keys=[schedule_id], lazy="joined")
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    # trackservice_entry = relationship("ScheduleEntry", foreign_keys=[playlist_id, entry_num], lazy="joined")
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    # schedule_entry = relationship("ScheduleEntry", primaryjoin="and_(TrackService.schedule_entry_id==ScheduleEntry.id)", lazy="joined")
    #
    # @staticmethod
    # # ------------------------------------------------------------------------------------------ #
    # def select_one(trackservice_id):
    #     return DB.session.query(TrackService).filter(TrackService.trackservice_id == trackservice_id).first()
    #
    # @staticmethod
    # # ------------------------------------------------------------------------------------------ #
    # def select_by_day(day):
    #     day_plus_one = day + datetime.timedelta(days=1)
    #     tracks = DB.session.query(TrackService).filter(TrackService.start >= str(day), TrackService.start < str(day_plus_one)).all()
    #     return tracks
    #
    # @staticmethod
    # # ------------------------------------------------------------------------------------------ #
    # def select_by_range(from_day, to_day):
    #     tracks = DB.session.query(TrackService).filter(TrackService.start >= str(from_day),
    #                                                    TrackService.start < str(to_day)).all()
    #     return tracks
    #
    # # ------------------------------------------------------------------------------------------ #
    # def __str__(self):
    #     return "TrackServiceID: #" + str(self.trackservice_id) + " playlist_id: " + str(self.playlist_id) + " started @ " + str(self.start) + " and played " + self.source
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# ------------------------------------------------------------------------------------------ #
# class TrackServiceSchedule(db.Model, AuraDatabaseModel):
#     """
#     Trackservice is tracking every schedule.
#     """
#     __tablename__ = 'trackservice_schedule'
#
#     # primary and foreign keys
#     ts_schedule_id = Column(Integer, primary_key=True, autoincrement=True)
#     schedule_id = Column(Integer, ForeignKey("schedule.schedule_id"))
#
#     schedule = relationship("Schedule", foreign_keys=[schedule_id], lazy="joined")
#
#     # ------------------------------------------------------------------------------------------ #
#     @staticmethod
#     def select_one(schedule_id):
#         # damn BAND-AID
#         # db.session.commit()
#
#         return db.session.query(ScheduleEntry).filter(TrackServiceSchedule.schedule_id == schedule_id).first()
#
# # ------------------------------------------------------------------------------------------ #
# class TrackServiceScheduleEntry(db.Model, AuraDatabaseModel):
#     """
#     And a schedule can have multiple entries
#     """
#     __tablename__ = 'trackservice_entry'
#
#     # primary and foreign keys. the foreign keys here can be null, because of fallback stuff
#     ts_entry_id = Column(Integer, primary_key=True, autoincrement=True)
#     ts_schedule_id = Column(Integer, ForeignKey("trackservice_schedule.ts_schedule_id"), nullable=True)
#     playlist_id = Column(Integer, nullable=True)
#     entry_num = Column(Integer, nullable=True)
#
#     fallback = Column(Boolean, default=False)
#     fallback_start = Column(DateTime, nullable=True, default=None)
#     source = Column(String(256), nullable=True, default=None)
#
#     # foreign key definitions
#     __table_args__ = (
#         ForeignKeyConstraint(['playlist_id', 'entry_num'], ['schedule_entry.playlist_id', 'schedule_entry.entry_num']),
#     )
#
#     trackservice_schedule = relationship("TrackServiceSchedule", foreign_keys=[ts_schedule_id], lazy="joined")
#     #trackservice_entry = relationship("ScheduleEntry", foreign_keys=[playlist_id, entry_num], lazy="joined")
#     trackservice_entry = relationship("ScheduleEntry", primaryjoin="and_(TrackServiceScheduleEntry.playlist_id==ScheduleEntry.playlist_id, TrackServiceScheduleEntry.entry_num==ScheduleEntry.entry_num)" , lazy="joined")
#
#     @staticmethod
#     def select_all():
#         return db.session.query(TrackServiceScheduleEntry).filter().all()

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# AuraDatabaseModel.recreate_db(systemexit=True)