Added a naive suboptimal foreground filesystem watcher

bin/supysonic-watcher

@@ -0,0 +1,92 @@
+#!/usr/bin/python
+# coding: utf-8
+
+# This file is part of Supysonic.
+#
+# Supysonic is a Python implementation of the Subsonic server API.
+# Copyright (C) 2014  Alban 'spl0k' Féron
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import time, sys
+import logging
+from watchdog.observers import Observer
+from watchdog.events import PatternMatchingEventHandler
+
+from supysonic import config
+from supysonic.scanner import Scanner
+
+class SupysonicWatcherEventHandler(PatternMatchingEventHandler):
+	def __init__(self, logger):
+		extensions = config.get('base', 'scanner_extensions')
+		patterns = map(lambda e: "*." + e.lower(), extensions.split()) if extensions else None
+		super(SupysonicWatcherEventHandler, self).__init__(patterns = patterns, ignore_directories = True)
+
+		self.__logger = logger
+
+	def on_created(self, event):
+		self.__logger.debug("Scanning created file %s", event.src_path)
+		Scanner(db.session).scan_file(event.src_path)
+		db.session.commit()
+
+	def on_deleted(self, event):
+		self.__logger.debug("File %s deleted", event.src_path)
+		track = db.Track.query.filter(db.Track.path == event.src_path).first()
+		if track:
+			folder = track.root_folder
+			Scanner(db.session).prune(folder)
+			db.session.commit()
+		else:
+			self.__logger.debug("Deleted file %s not in the database", event.src_path)
+
+	def on_modified(self, event):
+		self.__logger.debug("Scanning modified file %s", event.src_path)
+		Scanner(db.session).scan_file(event.src_path)
+		db.session.commit()
+
+	def on_moved(self, event):
+		pass
+
+if __name__ == "__main__":
+	if not config.check():
+		sys.exit(1)
+
+	logger = logging.getLogger(__name__)
+	log_handler = logging.StreamHandler(sys.stdout)
+	log_handler.setFormatter(logging.Formatter("%(asctime)s [%(levelname)s] %(message)s"))
+	logger.addHandler(log_handler)
+	logger.setLevel(logging.DEBUG)
+
+	from supysonic import db
+	db.init_db()
+
+	if not db.Folder.query.filter(db.Folder.root == True).count():
+		logger.info("No folder set. Exiting.")
+		sys.exit(0)
+
+	handler = SupysonicWatcherEventHandler(logger)
+	observer = Observer()
+	for folder in db.Folder.query.filter(db.Folder.root == True):
+		logger.info("Starting watcher for %s", folder.path)
+		observer.schedule(handler, folder.path, recursive = True)
+
+	observer.start()
+	try:
+		while True:
+			time.sleep(1)
+	except KeyboardInterrupt:
+		logger.info("Stopping watcher")
+		observer.stop()
+	observer.join()
+