forked from rc/aircox
442 lines
12 KiB
Python
442 lines
12 KiB
Python
import os
|
|
import socket
|
|
import re
|
|
import json
|
|
|
|
from django.utils.translation import ugettext as _, ugettext_lazy
|
|
from django.utils import timezone as tz
|
|
|
|
from aircox_programs.utils import to_timedelta
|
|
import aircox_programs.models as models
|
|
import aircox_liquidsoap.settings as settings
|
|
|
|
|
|
class Connector:
|
|
"""
|
|
Telnet connector utility.
|
|
|
|
address: a string to the unix domain socket file, or a tuple
|
|
(host, port) for TCP/IP connection
|
|
"""
|
|
__socket = None
|
|
__available = False
|
|
address = settings.AIRCOX_LIQUIDSOAP_SOCKET
|
|
|
|
@property
|
|
def available (self):
|
|
return self.__available
|
|
|
|
def __init__ (self, address = None):
|
|
if address:
|
|
self.address = address
|
|
|
|
def open (self):
|
|
if self.__available:
|
|
return
|
|
|
|
try:
|
|
family = socket.AF_INET if type(self.address) in (tuple, list) else \
|
|
socket.AF_UNIX
|
|
self.__socket = socket.socket(family, socket.SOCK_STREAM)
|
|
self.__socket.connect(self.address)
|
|
self.__available = True
|
|
except:
|
|
# print('can not connect to liquidsoap socket {}'.format(self.address))
|
|
self.__available = False
|
|
return -1
|
|
|
|
def send (self, *data, try_count = 1, parse = False, parse_json = False):
|
|
if self.open():
|
|
return ''
|
|
data = bytes(''.join([str(d) for d in data]) + '\n', encoding='utf-8')
|
|
|
|
try:
|
|
reg = re.compile(r'(.*)\s+END\s*$')
|
|
self.__socket.sendall(data)
|
|
data = ''
|
|
while not reg.search(data):
|
|
data += self.__socket.recv(1024).decode('unicode_escape')
|
|
|
|
if data:
|
|
data = reg.sub(r'\1', data)
|
|
data = data.strip()
|
|
|
|
if parse:
|
|
data = self.parse(data)
|
|
elif parse_json:
|
|
data = self.parse_json(data)
|
|
return data
|
|
except:
|
|
self.__available = False
|
|
if try_count > 0:
|
|
return self.send(data, try_count - 1)
|
|
|
|
def parse (self, string):
|
|
string = string.split('\n')
|
|
data = {}
|
|
for line in string:
|
|
line = re.search(r'(?P<key>[^=]+)="?(?P<value>([^"]|\\")+)"?', line)
|
|
if not line:
|
|
continue
|
|
line = line.groupdict()
|
|
data[line['key']] = line['value']
|
|
return data
|
|
|
|
def parse_json (self, string):
|
|
try:
|
|
if string[0] == '"' and string[-1] == '"':
|
|
string = string[1:-1]
|
|
return json.loads(string) if string else None
|
|
except:
|
|
return None
|
|
|
|
|
|
class Source:
|
|
"""
|
|
A structure that holds informations about a LiquidSoap source.
|
|
"""
|
|
controller = None
|
|
program = None
|
|
metadata = None
|
|
|
|
def __init__ (self, controller = None, program = None):
|
|
self.controller = controller
|
|
self.program = program
|
|
|
|
@property
|
|
def station (self):
|
|
"""
|
|
Proxy to self.(program|controller).station
|
|
"""
|
|
return self.program.station if self.program else \
|
|
self.controller.station
|
|
|
|
@property
|
|
def connector (self):
|
|
"""
|
|
Proxy to self.controller.connector
|
|
"""
|
|
return self.controller.connector
|
|
|
|
@property
|
|
def id (self):
|
|
"""
|
|
Identifier for the source, scoped in the station's one
|
|
"""
|
|
postfix = ('_stream_' + str(self.program.id)) if self.program else ''
|
|
return self.station.slug + postfix
|
|
|
|
@property
|
|
def name (self):
|
|
"""
|
|
Name of the related object (program or station)
|
|
"""
|
|
if self.program:
|
|
return self.program.name
|
|
return self.station.name
|
|
|
|
@property
|
|
def path (self):
|
|
"""
|
|
Path to the playlist
|
|
"""
|
|
return os.path.join(
|
|
settings.AIRCOX_LIQUIDSOAP_MEDIA,
|
|
self.id + '.m3u'
|
|
)
|
|
|
|
@property
|
|
def playlist (self):
|
|
"""
|
|
Get or set the playlist as an array, and update it into
|
|
the corresponding file.
|
|
"""
|
|
try:
|
|
with open(self.path, 'r') as file:
|
|
return file.readlines()
|
|
except:
|
|
return []
|
|
|
|
@playlist.setter
|
|
def playlist (self, sounds):
|
|
with open(self.path, 'w') as file:
|
|
file.write('\n'.join(sounds))
|
|
self.connector.send(self.name, '_playlist.reload')
|
|
|
|
|
|
@property
|
|
def current_sound (self):
|
|
self.update()
|
|
return self.metadata.get('initial_uri') if self.metadata else {}
|
|
|
|
def stream_info (self):
|
|
"""
|
|
Return a dict with info related to the program's stream
|
|
"""
|
|
if not self.program:
|
|
return
|
|
|
|
stream = models.Stream.objects.get(program = self.program)
|
|
if not stream.begin and not stream.delay:
|
|
return
|
|
|
|
def to_seconds (time):
|
|
return 3600 * time.hour + 60 * time.minute + time.second
|
|
|
|
return {
|
|
'begin': stream.begin.strftime('%Hh%M') if stream.begin else None,
|
|
'end': stream.end.strftime('%Hh%M') if stream.end else None,
|
|
'delay': to_seconds(stream.delay) if stream.delay else None
|
|
}
|
|
|
|
def skip (self):
|
|
"""
|
|
Skip a given source. If no source, use master.
|
|
"""
|
|
self.connector.send(self.id, '.skip')
|
|
|
|
def update (self, metadata = None):
|
|
"""
|
|
Update metadata with the given metadata dict or request them to
|
|
liquidsoap if nothing is given.
|
|
|
|
Return -1 in case no update happened
|
|
"""
|
|
if metadata is not None:
|
|
source = metadata.get('source') or ''
|
|
if self.program and not source.startswith(self.id):
|
|
return -1
|
|
self.metadata = metadata
|
|
return
|
|
|
|
# r = self.connector.send('var.get ', self.id + '_meta', parse_json=True)
|
|
r = self.connector.send(self.id, '.get', parse=True)
|
|
return self.update(metadata = r or {})
|
|
|
|
|
|
class Master (Source):
|
|
"""
|
|
A master Source
|
|
"""
|
|
def update (self, metadata = None):
|
|
if metadata is not None:
|
|
return super().update(metadata)
|
|
|
|
r = self.connector.send('request.on_air')
|
|
r = self.connector.send('request.metadata ', r, parse = True)
|
|
return self.update(metadata = r or {})
|
|
|
|
|
|
class Dealer (Source):
|
|
"""
|
|
The Dealer source is a source that is used for scheduled diffusions and
|
|
manual sound diffusion.
|
|
"""
|
|
name = _('Dealer')
|
|
|
|
@property
|
|
def id (self):
|
|
return self.station.slug + '_dealer'
|
|
|
|
def stream_info (self):
|
|
pass
|
|
|
|
@property
|
|
def on (self):
|
|
r = self.connector.send('var.get ', self.id, '_on')
|
|
return (r == 'true')
|
|
|
|
@on.setter
|
|
def on (self, value):
|
|
return self.connector.send('var.set ', self.id, '_on',
|
|
'=', 'true' if value else 'false')
|
|
|
|
@property
|
|
def playlist (self):
|
|
try:
|
|
with open(self.path, 'r') as file:
|
|
return file.readlines()
|
|
except:
|
|
return []
|
|
|
|
@playlist.setter
|
|
def playlist (self, sounds):
|
|
with open(self.path, 'w') as file:
|
|
file.write('\n'.join(sounds))
|
|
|
|
|
|
def __get_next (self, date, on_air):
|
|
"""
|
|
Return which diffusion should be played now and not playing
|
|
"""
|
|
r = [ models.Diffusion.get_prev(self.station, date),
|
|
models.Diffusion.get_next(self.station, date) ]
|
|
r = [ diffusion.prefetch_related('sounds')[0]
|
|
for diffusion in r if diffusion.count() ]
|
|
|
|
for diffusion in r:
|
|
duration = to_timedelta(diffusion.archives_duration())
|
|
end_at = diffusion.date + duration
|
|
if end_at < date:
|
|
continue
|
|
|
|
diffusion.playlist = [ sound.path
|
|
for sound in diffusion.get_archives() ]
|
|
if diffusion.playlist and on_air not in diffusion.playlist:
|
|
return diffusion
|
|
|
|
def monitor (self):
|
|
"""
|
|
Monitor playlist (if it is time to load) and if it time to trigger
|
|
the button to start a diffusion.
|
|
"""
|
|
playlist = self.playlist
|
|
on_air = self.current_sound
|
|
now = tz.make_aware(tz.datetime.now())
|
|
|
|
diff = self.__get_next(now, on_air)
|
|
if not diff:
|
|
return # there is nothing we can do
|
|
|
|
# playlist reload
|
|
if self.playlist != diff.playlist:
|
|
if not playlist or on_air == playlist[-1] or \
|
|
on_air not in playlist:
|
|
self.on = False
|
|
self.playlist = diff.playlist
|
|
|
|
# run the diff
|
|
if self.playlist == diff.playlist and diff.date <= now:
|
|
self.on = True
|
|
for source in self.controller.streams.values():
|
|
source.skip()
|
|
self.controller.log(
|
|
source = self.id,
|
|
diffusion = diff,
|
|
date = now,
|
|
comment = 'trigger the scheduled diffusion to liquidsoap; '
|
|
'skip all other streams',
|
|
)
|
|
|
|
|
|
class Controller:
|
|
connector = None
|
|
station = None # the related station
|
|
master = None # master source (station's source)
|
|
dealer = None # dealer source
|
|
streams = None # streams streams
|
|
|
|
@property
|
|
def on_air (self):
|
|
return self.master
|
|
|
|
@property
|
|
def id (self):
|
|
return self.master and self.master.id
|
|
|
|
@property
|
|
def name (self):
|
|
return self.master and self.master.name
|
|
|
|
def __init__ (self, station, connector = None):
|
|
"""
|
|
use_connector: avoids the creation of a Connector, in case it is not needed
|
|
"""
|
|
self.connector = connector
|
|
self.station = station
|
|
self.station.controller = self
|
|
|
|
self.master = Master(self)
|
|
self.dealer = Dealer(self)
|
|
self.streams = {
|
|
source.id : source
|
|
for source in [
|
|
Source(self, program)
|
|
for program in models.Program.objects.filter(station = station,
|
|
active = True)
|
|
if program.stream_set.count()
|
|
]
|
|
}
|
|
|
|
def get (self, source_id):
|
|
"""
|
|
Get a source by its id
|
|
"""
|
|
if source_id == self.master.id:
|
|
return self.master
|
|
if source_id == self.dealer.id:
|
|
return self.dealer
|
|
return self.streams.get(source_id)
|
|
|
|
def log (self, **kwargs):
|
|
"""
|
|
Create a log using **kwargs, and print info
|
|
"""
|
|
log = models.Log(**kwargs)
|
|
log.save()
|
|
log.print()
|
|
|
|
def update_all (self):
|
|
"""
|
|
Fetch and update all streams metadata.
|
|
"""
|
|
self.master.update()
|
|
self.dealer.update()
|
|
for source in self.streams.values():
|
|
source.update()
|
|
|
|
def __change_log (self, source):
|
|
last_log = models.Log.objects.filter(
|
|
source = source.id,
|
|
).prefetch_related('sound').order_by('-date')
|
|
|
|
on_air = source.current_sound
|
|
if not on_air:
|
|
return
|
|
|
|
if last_log:
|
|
last_log = last_log[0]
|
|
if last_log.sound and on_air == last_log.sound.path:
|
|
return
|
|
|
|
self.log(
|
|
source = source.id,
|
|
sound = models.Sound.objects.get(path = on_air),
|
|
date = tz.make_aware(tz.datetime.now()),
|
|
comment = 'sound has changed'
|
|
)
|
|
|
|
def monitor (self):
|
|
"""
|
|
Log changes in the streams, and call dealer.monitor.
|
|
"""
|
|
if not self.connector.available and self.connector.open():
|
|
return
|
|
|
|
self.dealer.monitor()
|
|
self.__change_log(self.dealer)
|
|
for source in self.streams.values():
|
|
self.__change_log(source)
|
|
|
|
|
|
class Monitor:
|
|
"""
|
|
Monitor multiple controllers.
|
|
"""
|
|
controllers = None
|
|
|
|
def __init__ (self, connector = None):
|
|
self.controllers = {
|
|
controller.id : controller
|
|
for controller in [
|
|
Controller(station, connector)
|
|
for station in models.Station.objects.filter(active = True)
|
|
]
|
|
}
|
|
|
|
def update (self):
|
|
for controller in self.controllers.values():
|
|
controller.update_all()
|
|
|
|
|