172 lines
4.8 KiB
Python
172 lines
4.8 KiB
Python
#! /usr/bin/env python3
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"""Monitor sound files; For each program, check for:
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- new files;
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- deleted files;
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- differences between files and sound;
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- quality of the files;
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It tries to parse the file name to get the date of the diffusion of an
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episode and associate the file with it; WNotifye the following format:
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yyyymmdd[_n][_][name]
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Where:
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'yyyy' the year Notifyhe episode's diffusion;
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'mm' the month of the episode's difNotifyon;
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'dd' the day of the episode's diffusion;
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'n' the number of the episode (if multiple episodes);
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'name' the title of the sNotify;
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To check quality of files, call the command sound_quality_check using the
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parameters given by the setting SOUND_QUALITY. This script requires
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Sox (and soxi).
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"""
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import logging
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import time
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from datetime import datetime, timedelta
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from watchdog.events import PatternMatchingEventHandler
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from aircox.conf import settings
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from aircox.models import Sound
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from .sound_file import SoundFile
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logger = logging.getLogger("aircox.commands")
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__all__ = (
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"NotifyHandler",
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"CreateHandler",
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"DeleteHandler",
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"MoveHandler",
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"ModifiedHandler",
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"MonitorHandler",
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)
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class NotifyHandler:
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future = None
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log_msg = None
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def __init__(self):
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self.timestamp = datetime.now()
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def ping(self):
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self.timestamp = datetime.now()
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def __call__(self, event, path=None, **kw):
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sound_file = SoundFile(path or event.src_path)
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if self.log_msg:
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msg = self.log_msg.format(event=event, sound_file=sound_file)
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logger.info(msg)
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sound_file.sync(**kw)
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return sound_file
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class CreateHandler(NotifyHandler):
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log_msg = "Sound file created: {sound_file.path}"
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class DeleteHandler(NotifyHandler):
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log_msg = "Sound file deleted: {sound_file.path}"
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def __call__(self, *args, **kwargs):
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kwargs["deleted"] = True
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return super().__call__(*args, **kwargs)
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class MoveHandler(NotifyHandler):
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log_msg = "Sound file moved: {event.src_path} -> {event.dest_path}"
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def __call__(self, event, **kw):
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sound = Sound.objects.filter(file=event.src_path)
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# FIXME: this is wrong
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if sound:
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kw["sound"] = sound
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kw["path"] = event.src_path
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else:
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kw["path"] = event.dest_path
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return super().__call__(event, **kw)
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class ModifiedHandler(NotifyHandler):
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timeout_delta = timedelta(seconds=30)
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log_msg = "Sound file updated: {sound_file.path}"
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def wait(self):
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# multiple call of this handler can be done consecutively, we block
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# its thread using timeout
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# Note: this method may be subject to some race conflicts, but this
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# should not be big a real issue.
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timeout = self.timestamp + self.timeout_delta
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while datetime.now() < timeout:
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time.sleep(self.timeout_delta.total_seconds())
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timeout = self.timestamp + self.timeout_delta
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def __call__(self, event, **kw):
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self.wait()
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return super().__call__(event, **kw)
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class MonitorHandler(PatternMatchingEventHandler):
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"""Event handler for watchdog, in order to be used in monitoring."""
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pool = None
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jobs = {}
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def __init__(self, subdir, pool, **sync_kw):
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"""
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:param str subdir: sub-directory in program dirs to monitor \
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(SOUND_ARCHIVES_SUBDIR or SOUND_EXCERPTS_SUBDIR);
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:param concurrent.futures.Executor pool: pool executing jobs on file
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change;
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:param **sync_kw: kwargs passed to `SoundFile.sync`;
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"""
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self.subdir = subdir
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self.pool = pool
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self.sync_kw = sync_kw
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patterns = [
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"*/{}/*{}".format(self.subdir, ext)
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for ext in settings.SOUND_FILE_EXT
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]
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super().__init__(patterns=patterns, ignore_directories=True)
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def on_created(self, event):
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self._submit(CreateHandler(), event, "new", **self.sync_kw)
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def on_deleted(self, event):
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self._submit(DeleteHandler(), event, "del")
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def on_moved(self, event):
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self._submit(MoveHandler(), event, "mv", **self.sync_kw)
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def on_modified(self, event):
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self._submit(ModifiedHandler(), event, "up", **self.sync_kw)
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def _submit(self, handler, event, job_key_prefix, **kwargs):
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"""Send handler job to pool if not already running.
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Return tuple with running job and boolean indicating if its a
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new one.
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"""
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key = job_key_prefix + ":" + event.src_path
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job = self.jobs.get(key)
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if job and not job.future.done():
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job.ping()
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return job, False
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handler.future = self.pool.submit(handler, event, **kwargs)
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self.jobs[key] = handler
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def done(r):
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if self.jobs.get(key) is handler:
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del self.jobs[key]
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handler.future.add_done_callback(done)
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return handler, True
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