64 lines
3.1 KiB
Python
64 lines
3.1 KiB
Python
import os
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from pydispatch import dispatcher
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from media.monitor.events import NewFile, DeleteFile
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from media.monitor.log import Loggable
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import media.monitor.pure as mmp
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class Bootstrapper(Loggable):
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"""
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Bootstrapper reads all the info in the filesystem flushes organize
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events and watch events
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"""
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def __init__(self,db,last_ran,org_channels,watch_channels):
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self.db = db
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self.org_channels = org_channels
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self.watch_channels = watch_channels
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self.last_ran = last_ran
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def flush_watch(self):
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"""
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Syncs the file system into the database. Walks over deleted/new/modified files since
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the last run in mediamonitor and sends requests to make the database consistent with
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file system
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"""
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# Songs is a dictionary where every key is the watched the directory
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# and the value is a set with all the files in that directory.
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songs = {}
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modded = deleted = 0
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signal_by_path = dict( (pc.signal, pc.path) for pc in self.watch_channels )
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for pc in self.watch_channels:
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songs[ pc.path ] = set()
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for f in mmp.walk_supported(pc.path, clean_empties=False):
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songs[ pc.path ].add(f)
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# We decide whether to update a file's metadata by checking
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# its system modification date. If it's above the value
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# self.last_ran which is passed to us that means media monitor
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# wasn't aware when this changes occured in the filesystem
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# hence it will send the correct events to sync the database
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# with the filesystem
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if os.path.getmtime(f) > self.last_ran:
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modded += 1
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dispatcher.send(signal=pc.signal, sender=self, event=DeleteFile(f))
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dispatcher.send(signal=pc.signal, sender=self, event=NewFile(f))
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# Want all files in the database that are not in the filesystem
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for watch_dir in self.db.list_directories():
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db_songs = self.db.directory_get_files(watch_dir)
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# Get all the files that are in the database but in the file
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# system. These are the files marked for deletions
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for to_delete in db_songs.difference(songs[watch_dir]):
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# need the correct watch channel signal to call delete
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if watch_dir in signal_by_path:
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dispatcher.send(signal=signal_by_path[watch_dir], sender=self, event=DeleteFile(f))
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# TODO : get rid of this, we should never delete files from
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# the FS even if they are deleted in airtime. Instead we
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# should put this file on a global ignore list until it's
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# re-added or something
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# os.remove(to_delete)
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deleted += 1
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else:
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self.logger.error("Could not find the signal corresponding to path: '%s'" % watch_dir)
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self.logger.info( "Flushed watch directories. (modified, deleted) = (%d, %d)"
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% (modded, deleted) )
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