111 lines
3.2 KiB
Python
111 lines
3.2 KiB
Python
"""
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Component for monitoring activity on a folder.
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For more details about this platform, refer to the documentation at
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https://home-assistant.io/components/folder_watcher/
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"""
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import os
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import logging
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import voluptuous as vol
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from homeassistant.const import (
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EVENT_HOMEASSISTANT_START, EVENT_HOMEASSISTANT_STOP)
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import homeassistant.helpers.config_validation as cv
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REQUIREMENTS = ['watchdog==0.8.3']
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_LOGGER = logging.getLogger(__name__)
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CONF_FOLDER = 'folder'
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CONF_PATTERNS = 'patterns'
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DEFAULT_PATTERN = '*'
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DOMAIN = "folder_watcher"
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CONFIG_SCHEMA = vol.Schema({
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DOMAIN: vol.All(cv.ensure_list, [vol.Schema({
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vol.Required(CONF_FOLDER): cv.isdir,
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vol.Optional(CONF_PATTERNS, default=[DEFAULT_PATTERN]):
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vol.All(cv.ensure_list, [cv.string]),
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})])
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}, extra=vol.ALLOW_EXTRA)
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def setup(hass, config):
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"""Set up the folder watcher."""
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conf = config[DOMAIN]
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for watcher in conf:
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path = watcher[CONF_FOLDER]
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patterns = watcher[CONF_PATTERNS]
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if not hass.config.is_allowed_path(path):
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_LOGGER.error("folder %s is not valid or allowed", path)
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return False
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Watcher(path, patterns, hass)
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return True
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def create_event_handler(patterns, hass):
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""""Return the Watchdog EventHandler object."""
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from watchdog.events import PatternMatchingEventHandler
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class EventHandler(PatternMatchingEventHandler):
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"""Class for handling Watcher events."""
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def __init__(self, patterns, hass):
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"""Initialise the EventHandler."""
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super().__init__(patterns)
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self.hass = hass
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def process(self, event):
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"""On Watcher event, fire HA event."""
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_LOGGER.debug("process(%s)", event)
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if not event.is_directory:
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folder, file_name = os.path.split(event.src_path)
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self.hass.bus.fire(
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DOMAIN, {
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"event_type": event.event_type,
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'path': event.src_path,
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'file': file_name,
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'folder': folder,
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})
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def on_modified(self, event):
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"""File modified."""
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self.process(event)
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def on_moved(self, event):
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"""File moved."""
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self.process(event)
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def on_created(self, event):
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"""File created."""
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self.process(event)
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def on_deleted(self, event):
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"""File deleted."""
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self.process(event)
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return EventHandler(patterns, hass)
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class Watcher():
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"""Class for starting Watchdog."""
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def __init__(self, path, patterns, hass):
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"""Initialise the watchdog observer."""
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from watchdog.observers import Observer
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self._observer = Observer()
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self._observer.schedule(
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create_event_handler(patterns, hass),
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path,
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recursive=True)
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hass.bus.listen_once(EVENT_HOMEASSISTANT_START, self.startup)
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hass.bus.listen_once(EVENT_HOMEASSISTANT_STOP, self.shutdown)
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def startup(self, event):
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"""Start the watcher."""
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self._observer.start()
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def shutdown(self, event):
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"""Shutdown the watcher."""
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self._observer.stop()
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self._observer.join()
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