tuhi/tools/tuhi-kete.py

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#!/usr/bin/env python3
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 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 General Public License for more details.
#
from gi.repository import GObject, Gio, GLib
import sys
import argparse
import os
import json
import logging
import select
import time
import svgwrite
logging.basicConfig(format='%(levelname)s: %(message)s',
level=logging.INFO)
logger = logging.getLogger('tuhi-kete')
TUHI_DBUS_NAME = 'org.freedesktop.tuhi1'
ORG_FREEDESKTOP_TUHI1_MANAGER = 'org.freedesktop.tuhi1.Manager'
ORG_FREEDESKTOP_TUHI1_DEVICE = 'org.freedesktop.tuhi1.Device'
ROOT_PATH = '/org/freedesktop/tuhi1'
class DBusError(Exception):
def __init__(self, message):
self.message = message
class _DBusObject(GObject.Object):
_connection = None
def __init__(self, name, interface, objpath):
GObject.GObject.__init__(self)
if _DBusObject._connection is None:
self._connect_to_session()
self.interface = interface
self.objpath = objpath
try:
self.proxy = Gio.DBusProxy.new_sync(_DBusObject._connection,
Gio.DBusProxyFlags.NONE, None,
name, objpath, interface, None)
except GLib.Error as e:
if (e.domain == 'g-io-error-quark' and
e.code == Gio.IOErrorEnum.DBUS_ERROR):
raise DBusError(e.message)
else:
raise e
if self.proxy.get_name_owner() is None:
raise DBusError('No-one is handling {}, is the daemon running?'.format(name))
self.proxy.connect('g-properties-changed', self._on_properties_changed)
self.proxy.connect('g-signal', self._on_signal_received)
def _connect_to_session(self):
try:
_DBusObject._connection = Gio.bus_get_sync(Gio.BusType.SESSION, None)
except GLib.Error as e:
if (e.domain == 'g-io-error-quark' and
e.code == Gio.IOErrorEnum.DBUS_ERROR):
raise DBusError(e.message)
else:
raise e
def _on_properties_changed(self, proxy, changed_props, invalidated_props):
# Implement this in derived classes to respond to property changes
pass
def _on_signal_received(self, proxy, sender, signal, parameters):
# Implement this in derived classes to respond to signals
pass
def property(self, name):
p = self.proxy.get_cached_property(name)
if p is not None:
return p.unpack()
return p
class TuhiKeteDevice(_DBusObject):
def __init__(self, manager, objpath):
_DBusObject.__init__(self, TUHI_DBUS_NAME,
ORG_FREEDESKTOP_TUHI1_DEVICE,
objpath)
self.manager = manager
self.is_pairing = False
@GObject.Property
def address(self):
return self.property('Address')
@GObject.Property
def name(self):
return self.property('Name')
@GObject.Property
def listening(self):
return self.property('Listening')
@GObject.Property
def drawings_available(self):
return self.property('DrawingsAvailable')
def pair(self):
logger.debug('{}: Pairing'.format(self))
# FIXME: Pair() doesn't return anything useful yet, so we wait until
# the device is in the Manager's Devices property
self.manager.connect('notify::devices', self._on_mgr_devices_updated)
self.is_pairing = True
self.proxy.Pair()
def start_listening(self):
self.proxy.StartListening()
def stop_listening(self):
self.proxy.StopListening()
def json(self, index):
return self.proxy.GetJSONData('(u)', index)
def _on_signal_received(self, proxy, sender, signal, parameters):
if signal == 'ButtonPressRequired':
print("{}: Press button on device now".format(self))
elif signal == 'ListeningStopped':
err = parameters[0]
if err < 0:
print("{}: an error occured: {}".format(self, os.strerror(err)))
self.notify('listening')
def _on_properties_changed(self, proxy, changed_props, invalidated_props):
if changed_props is None:
return
changed_props = changed_props.unpack()
if 'DrawingsAvailable' in changed_props:
self.notify('drawings-available')
def __repr__(self):
return '{} - {}'.format(self.address, self.name)
def _on_mgr_devices_updated(self, manager, pspec):
if not self.is_pairing:
return
for d in manager.devices:
if d.address == self.address:
self.is_pairing = False
print('{}: Pairing successful'.format(self))
2018-01-23 05:20:37 +01:00
self.manager.quit()
class TuhiKeteManager(_DBusObject):
__gsignals__ = {
"pairable-device":
(GObject.SIGNAL_RUN_FIRST, None, (GObject.TYPE_PYOBJECT,)),
}
def __init__(self):
_DBusObject.__init__(self, TUHI_DBUS_NAME,
ORG_FREEDESKTOP_TUHI1_MANAGER,
ROOT_PATH)
Gio.bus_watch_name(Gio.BusType.SESSION,
TUHI_DBUS_NAME,
Gio.BusNameWatcherFlags.NONE,
None,
self._on_name_vanished)
self.mainloop = GObject.MainLoop()
self._devices = {}
self._pairable_devices = {}
for objpath in self.property('Devices'):
device = TuhiKeteDevice(self, objpath)
self._devices[device.address] = device
@GObject.Property
def devices(self):
return [v for k, v in self._devices.items()]
@GObject.Property
def searching(self):
return self.proxy.get_cached_property('Searching')
def start_search(self):
self._pairable_devices = {}
self.proxy.StartSearch()
def stop_search(self):
self.proxy.StopSearch()
self._pairable_devices = {}
def run(self):
try:
self.mainloop.run()
except KeyboardInterrupt:
print('\r', end='') # to remove the ^C
self.mainloop.quit()
def quit(self):
self.mainloop.quit()
def _on_properties_changed(self, proxy, changed_props, invalidated_props):
if changed_props is None:
return
changed_props = changed_props.unpack()
if 'Devices' in changed_props:
objpaths = changed_props['Devices']
for objpath in objpaths:
try:
d = self._pairable_devices[objpath]
self._devices[d.address] = d
del self._pairable_devices[objpath]
except KeyError:
# if we called Pair() on an existing device it's not in
# pairable devices
pass
self.notify('devices')
def _on_signal_received(self, proxy, sender, signal, parameters):
if signal == 'SearchStopped':
self.notify('searching')
elif signal == 'PairableDevice':
objpath = parameters[0]
device = TuhiKeteDevice(self, objpath)
self._pairable_devices[objpath] = device
logger.debug('Found pairable device: {}'.format(device))
self.emit('pairable-device', device)
def _on_name_vanished(self, connection, name):
logger.error('Tuhi daemon went away')
self.mainloop.quit()
def __getitem__(self, btaddr):
return self._devices[btaddr]
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
pass
class Searcher(GObject.Object):
def __init__(self, manager, address=None):
GObject.GObject.__init__(self)
self.manager = manager
self.address = address
self.is_pairing = False
def run(self):
if self.manager.searching:
logger.error('Another client is already searching')
return
self.manager.connect('notify::searching', self._on_notify_search)
self.manager.connect('pairable-device', self._on_pairable_device)
self.manager.start_search()
logger.debug('Started searching')
for d in self.manager.devices:
self._on_pairable_device(self.manager, d)
self.manager.run()
if self.manager.searching:
logger.debug('Stopping search')
self.manager.stop_search()
def _on_notify_search(self, manager, pspec):
if not manager.searching:
logger.info('Search cancelled')
if not self.is_pairing:
self.manager.quit()
def _on_pairable_device(self, manager, device):
print('Pairable device: {}'.format(device))
if self.address is None:
print('Connect to device? [y/N] ', end='')
sys.stdout.flush()
i, o, e = select.select([sys.stdin], [], [], 5)
if i:
answer = sys.stdin.readline().strip()
if answer.lower() == 'y':
self.address = device.address
else:
print('timed out')
if device.address == self.address:
self.is_pairing = True
device.pair()
class Listener(GObject.Object):
def __init__(self, manager, address):
GObject.GObject.__init__(self)
self.manager = manager
self.device = None
for d in manager.devices:
if d.address == address:
self.device = d
break
else:
logger.error("{}: device not found".format(address))
return
def run(self):
if self.device is None:
return
if self.device.drawings_available:
self._log_drawings_available(self.device)
if self.device.listening:
logger.info("{}: device already listening".format(self.device))
return
logger.debug("{}: starting listening".format(self.device))
self.device.connect('notify::listening', self._on_device_listening)
self.device.connect('notify::drawings-available', self._on_drawings_available)
self.device.start_listening()
self.manager.run()
logger.debug("{}: stopping listening".format(self.device))
try:
self.device.stop_listening()
except GLib.Error as e:
if (e.domain != 'g-dbus-error-quark' or
e.code != Gio.IOErrorEnum.EXISTS or
Gio.dbus_error_get_remote_error(e) != 'org.freedesktop.DBus.Error.ServiceUnknown'):
raise e
def _on_device_listening(self, device, pspec):
logger.info('{}: Listening stopped, exiting'.format(device))
self.manager.quit()
def _on_drawings_available(self, device, pspec):
self._log_drawings_available(device)
def _log_drawings_available(self, device):
s = ", ".join(["{}".format(t) for t in device.drawings_available])
logger.info('{}: drawings available: {}'.format(device, s))
class Fetcher(GObject.Object):
def __init__(self, manager, address, index):
GObject.GObject.__init__(self)
self.manager = manager
self.device = None
self.indices = None
for d in manager.devices:
if d.address == address:
self.device = d
break
else:
logger.error("{}: device not found".format(address))
return
if index != 'all':
try:
index = int(index)
if index not in self.device.drawings_available:
raise ValueError()
self.indices = [index]
except ValueError:
logger.error("Invalid index {}".format(index))
return
else:
self.indices = self.device.drawings_available
def run(self):
if self.device is None or self.indices is None:
return
for idx in self.indices:
jsondata = self.device.json(idx)
data = json.loads(jsondata)
t = time.gmtime(data['timestamp'])
t = time.strftime('%Y-%m-%d-%H-%M', t)
path = f'{data["devicename"]}-{t}.svg'
self.json_to_svg(data, path)
logger.info(f'{data["devicename"]}: saved file "{path}"')
def json_to_svg(self, js, filename):
dimensions = js['dimensions']
if dimensions == [0, 0]:
dimensions = 100, 100
svg = svgwrite.Drawing(filename=filename, size=dimensions)
g = svgwrite.container.Group(id='layer0')
for s in js['strokes']:
svgpoints = []
mode = 'M'
for p in s['points']:
x, y = p['position']
svgpoints.append((mode, x, y))
mode = 'L'
path = svgwrite.path.Path(d=svgpoints,
style="fill:none;stroke:black;stroke-width:5")
g.add(path)
svg.add(g)
svg.save()
def print_device(d):
print('{}: {}'.format(d.address, d.name))
def cmd_list(manager, args):
logger.debug('Listing available devices:')
for d in manager.devices:
print_device(d)
def cmd_pair(manager, args):
Searcher(manager, args.address).run()
def cmd_listen(manager, args):
Listener(manager, args.address).run()
def cmd_fetch(manager, args):
Fetcher(manager, args.address, args.index).run()
def parse_list(parser):
sub = parser.add_parser('list', help='list known devices')
sub.set_defaults(func=cmd_list)
def parse_pair(parser):
sub = parser.add_parser('pair', help='pair a new device')
sub.add_argument('address', metavar='12:34:56:AB:CD:EF', type=str,
nargs='?', default=None,
help='the address of the device to pair')
sub.set_defaults(func=cmd_pair)
def parse_listen(parser):
sub = parser.add_parser('listen', help='listen to events from a device')
sub.add_argument('address', metavar='12:34:56:AB:CD:EF', type=str,
default=None,
help='the address of the device to listen to')
sub.set_defaults(func=cmd_listen)
def parse_fetch(parser):
sub = parser.add_parser('fetch', help='download a drawing from a device and save as svg in $PWD')
sub.add_argument('address', metavar='12:34:56:AB:CD:EF', type=str,
default=None,
help='the address of the device to fetch from')
sub.add_argument('index', metavar='[<index>|all]', type=str,
default=None,
help='the index of the drawing to fetch or a literal "all"')
sub.set_defaults(func=cmd_fetch)
def parse(args):
desc = 'Commandline client to the Tuhi DBus daemon'
parser = argparse.ArgumentParser(description=desc)
parser.add_argument('-v', '--verbose',
help='Show some debugging informations',
action='store_true',
default=False)
subparser = parser.add_subparsers(help='Available commands')
parse_list(subparser)
parse_pair(subparser)
parse_listen(subparser)
parse_fetch(subparser)
return parser.parse_args(args[1:])
def main(args):
args = parse(args)
if args.verbose:
logger.setLevel(logging.DEBUG)
try:
with TuhiKeteManager() as mgr:
if not hasattr(args, 'func'):
args.func = cmd_list
args.func(mgr, args)
except DBusError as e:
logger.error(e.message)
if __name__ == "__main__":
main(sys.argv)