547 lines
20 KiB
Python
547 lines
20 KiB
Python
#!/usr/bin/env python3
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# SAT plugin for adding D-Bus to Ad-Hoc Commands
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# Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from collections import OrderedDict
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import os.path
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import uuid
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from twisted.internet import defer
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from twisted.internet import reactor
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from twisted.words.protocols.jabber import jid
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from wokkel import data_form
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from libervia.backend.core.constants import Const as C
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from libervia.backend.core.i18n import D_, _
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from libervia.backend.core.log import getLogger
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log = getLogger(__name__)
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try:
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from lxml import etree
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except ImportError:
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etree = None
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log.warning(
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"Missing module lxml, please download/install it from http://lxml.de/ ."
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"Auto D-Bus discovery will be disabled"
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)
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try:
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import txdbus
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from txdbus import client as dbus_client
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except ImportError:
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txdbus = None
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log.warning(
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"Missing module txdbus, please download/install it, auto D-Bus discovery will be "
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"disabled"
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)
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NS_MEDIA_PLAYER = "org.libervia.mediaplayer"
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FD_NAME = "org.freedesktop.DBus"
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FD_PATH = "/org/freedekstop/DBus"
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INTROSPECT_IFACE = "org.freedesktop.DBus.Introspectable"
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MPRIS_PREFIX = "org.mpris.MediaPlayer2"
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CMD_GO_BACK = "GoBack"
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CMD_GO_FWD = "GoFW"
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SEEK_OFFSET = 5 * 1000 * 1000
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MPRIS_COMMANDS = [
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"org.mpris.MediaPlayer2.Player." + cmd
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for cmd in ("Previous", CMD_GO_BACK, "PlayPause", CMD_GO_FWD, "Next")
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]
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MPRIS_PATH = "/org/mpris/MediaPlayer2"
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MPRIS_PROPERTIES = OrderedDict(
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(
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("org.mpris.MediaPlayer2", ("Identity",)),
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(
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"org.mpris.MediaPlayer2.Player",
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(
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"Metadata",
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"PlaybackStatus",
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"Volume",
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),
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),
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)
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)
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MPRIS_METADATA_KEY = "Metadata"
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MPRIS_METADATA_MAP = OrderedDict((("xesam:title", "Title"),))
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INTROSPECT_METHOD = "Introspect"
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IGNORED_IFACES_START = (
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"org.freedesktop",
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"org.qtproject",
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"org.kde.KMainWindow",
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) # commands in interface starting with these values will be ignored
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FLAG_LOOP = "LOOP"
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PLUGIN_INFO = {
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C.PI_NAME: "Ad-Hoc Commands - D-Bus",
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C.PI_IMPORT_NAME: "AD_HOC_DBUS",
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C.PI_TYPE: "Misc",
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C.PI_PROTOCOLS: [],
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C.PI_DEPENDENCIES: ["XEP-0050"],
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C.PI_MAIN: "AdHocDBus",
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C.PI_HANDLER: "no",
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C.PI_DESCRIPTION: _("""Add D-Bus management to Ad-Hoc commands"""),
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}
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class AdHocDBus:
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def __init__(self, host):
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log.info(f"plugin {PLUGIN_INFO[C.PI_NAME]!r} initialization")
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self.host = host
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if etree is not None:
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host.bridge.add_method(
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"ad_hoc_dbus_add_auto",
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".plugin",
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in_sign="sasasasasasass",
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out_sign="(sa(sss))",
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method=self._ad_hoc_dbus_add_auto,
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async_=True,
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)
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host.bridge.add_method(
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"ad_hoc_remotes_get",
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".plugin",
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in_sign="s",
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out_sign="a(sss)",
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method=self._ad_hoc_remotes_get,
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async_=True,
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)
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self._c = host.plugins["XEP-0050"]
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host.register_namespace("mediaplayer", NS_MEDIA_PLAYER)
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self.session_con = None
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async def profile_connected(self, client):
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if txdbus is not None:
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if self.session_con is None:
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self.session_con = await dbus_client.connect(reactor, "session")
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self.fd_object = await self.session_con.getRemoteObject(FD_NAME, FD_PATH)
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self._c.add_ad_hoc_command(
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client,
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self.local_media_cb,
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D_("Media Players"),
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node=NS_MEDIA_PLAYER,
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timeout=60 * 60 * 6, # 6 hours timeout, to avoid breaking remote
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# in the middle of a movie
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)
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async def _dbus_async_call(self, proxy, method, *args, **kwargs):
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"""Call a DBus method asynchronously and return a deferred
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@param proxy: DBus object proxy, as returner by get_object
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@param method: name of the method to call
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@param args: will be transmitted to the method
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@param kwargs: will be transmetted to the method, except for the following poped
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values:
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- interface: name of the interface to use
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@return: a deferred
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"""
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return await proxy.callRemote(method, *args, **kwargs)
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async def _dbus_get_property(self, proxy, interface, name):
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return await self._dbus_async_call(
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proxy, "Get", interface, name, interface="org.freedesktop.DBus.Properties"
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)
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async def _dbus_list_names(self):
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return await self.fd_object.callRemote("ListNames")
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async def _dbus_introspect(self, proxy):
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return await self._dbus_async_call(
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proxy, INTROSPECT_METHOD, interface=INTROSPECT_IFACE
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)
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def _accept_method(self, method):
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"""Return True if we accept the method for a command
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@param method: etree.Element
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@return: True if the method is acceptable
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"""
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if method.xpath(
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"arg[@direction='in']"
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): # we don't accept method with argument for the moment
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return False
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return True
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async def _introspect(self, methods, bus_name, proxy):
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log.debug("introspecting path [%s]" % proxy.object_path)
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assert etree is not None
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introspect_xml = await self._dbus_introspect(proxy)
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el = etree.fromstring(introspect_xml)
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for node in el.iterchildren("node", "interface"):
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if node.tag == "node":
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new_path = os.path.join(proxy.object_path, node.get("name"))
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new_proxy = await self.session_con.getRemoteObject(bus_name, new_path)
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await self._introspect(methods, bus_name, new_proxy)
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elif node.tag == "interface":
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name = node.get("name")
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if any(name.startswith(ignored) for ignored in IGNORED_IFACES_START):
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log.debug("interface [%s] is ignored" % name)
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continue
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log.debug("introspecting interface [%s]" % name)
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for method in node.iterchildren("method"):
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if self._accept_method(method):
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method_name = method.get("name")
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log.debug("method accepted: [%s]" % method_name)
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methods.add((proxy.object_path, name, method_name))
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def _ad_hoc_dbus_add_auto(
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self,
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prog_name,
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allowed_jids,
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allowed_groups,
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allowed_magics,
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forbidden_jids,
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forbidden_groups,
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flags,
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profile_key,
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):
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client = self.host.get_client(profile_key)
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return self.ad_hoc_dbus_add_auto(
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client,
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prog_name,
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allowed_jids,
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allowed_groups,
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allowed_magics,
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forbidden_jids,
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forbidden_groups,
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flags,
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)
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async def ad_hoc_dbus_add_auto(
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self,
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client,
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prog_name,
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allowed_jids=None,
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allowed_groups=None,
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allowed_magics=None,
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forbidden_jids=None,
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forbidden_groups=None,
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flags=None,
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):
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bus_names = await self._dbus_list_names()
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bus_names = [bus_name for bus_name in bus_names if "." + prog_name in bus_name]
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if not bus_names:
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log.info("Can't find any bus for [%s]" % prog_name)
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return ("", [])
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bus_names.sort()
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for bus_name in bus_names:
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if bus_name.endswith(prog_name):
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break
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else:
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log.info(f"Can't find any command for {prog_name}")
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return ("", [])
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log.info(f"bus name found: {bus_name}")
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proxy = await self.session_con.getRemoteObject(bus_name, "/")
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methods = set()
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await self._introspect(methods, bus_name, proxy)
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if methods:
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self._add_command(
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client,
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prog_name,
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bus_name,
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methods,
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allowed_jids=allowed_jids,
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allowed_groups=allowed_groups,
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allowed_magics=allowed_magics,
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forbidden_jids=forbidden_jids,
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forbidden_groups=forbidden_groups,
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flags=flags,
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)
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return (str(bus_name), methods)
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def _add_command(
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self,
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client,
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adhoc_name,
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bus_name,
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methods,
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allowed_jids=None,
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allowed_groups=None,
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allowed_magics=None,
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forbidden_jids=None,
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forbidden_groups=None,
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flags=None,
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):
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if flags is None:
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flags = set()
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async def d_bus_callback(client, command_elt, session_data, action, node):
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actions = session_data.setdefault("actions", [])
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names_map = session_data.setdefault("names_map", {})
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actions.append(action)
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if len(actions) == 1:
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# it's our first request, we ask the desired new status
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status = self._c.STATUS.EXECUTING
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form = data_form.Form("form", title=_("Command selection"))
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options = []
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for path, iface, command in methods:
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label = command.rsplit(".", 1)[-1]
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name = str(uuid.uuid4())
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names_map[name] = (path, iface, command)
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options.append(data_form.Option(name, label))
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field = data_form.Field(
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"list-single", "command", options=options, required=True
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)
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form.addField(field)
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payload = form.toElement()
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note = None
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elif len(actions) == 2:
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# we should have the answer here
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try:
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x_elt = next(command_elt.elements(data_form.NS_X_DATA, "x"))
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answer_form = data_form.Form.fromElement(x_elt)
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command = answer_form["command"]
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except (KeyError, StopIteration):
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raise self._c.AdHocError(self._c.ERROR.BAD_PAYLOAD)
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if command not in names_map:
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raise self._c.AdHocError(self._c.ERROR.BAD_PAYLOAD)
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path, iface, command = names_map[command]
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proxy = await self.session_con.getRemoteObject(bus_name, path)
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await self._dbus_async_call(proxy, command, interface=iface)
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# job done, we can end the session, except if we have FLAG_LOOP
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if FLAG_LOOP in flags:
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# We have a loop, so we clear everything and we execute again the
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# command as we had a first call (command_elt is not used, so None
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# is OK)
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del actions[:]
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names_map.clear()
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return await d_bus_callback(
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client, None, session_data, self._c.ACTION.EXECUTE, node
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)
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form = data_form.Form("form", title=_("Updated"))
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form.addField(data_form.Field("fixed", "Command sent"))
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status = self._c.STATUS.COMPLETED
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payload = None
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note = (self._c.NOTE.INFO, _("Command sent"))
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else:
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raise self._c.AdHocError(self._c.ERROR.INTERNAL)
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return (payload, status, None, note)
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self._c.add_ad_hoc_command(
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client,
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d_bus_callback,
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adhoc_name,
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allowed_jids=allowed_jids,
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allowed_groups=allowed_groups,
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allowed_magics=allowed_magics,
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forbidden_jids=forbidden_jids,
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forbidden_groups=forbidden_groups,
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)
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## Local media ##
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def _ad_hoc_remotes_get(self, profile):
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return self.ad_hoc_remotes_get(self.host.get_client(profile))
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async def ad_hoc_remotes_get(self, client):
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"""Retrieve available remote media controlers in our devices
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@return (list[tuple[unicode, unicode, unicode]]): list of devices with:
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- entity full jid
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- device name
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- device label
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"""
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found_data = await defer.ensureDeferred(
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self.host.find_by_features(
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client,
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[self.host.ns_map["commands"]],
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service=False,
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roster=False,
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own_jid=True,
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local_device=True,
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)
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)
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remotes = []
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for found in found_data:
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for device_jid_s in found:
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device_jid = jid.JID(device_jid_s)
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cmd_list = await self._c.list_commands(client, device_jid)
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for cmd in cmd_list:
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if cmd.nodeIdentifier == NS_MEDIA_PLAYER:
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try:
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result_elt = await self._c.do(
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client, device_jid, NS_MEDIA_PLAYER, timeout=5
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)
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command_elt = self._c.get_command_elt(result_elt)
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form = data_form.findForm(command_elt, NS_MEDIA_PLAYER)
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if form is None:
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continue
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mp_options = form.fields["media_player"].options
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session_id = command_elt.getAttribute("sessionid")
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if mp_options and session_id:
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# we just want to discover player, so we cancel the
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# session
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self._c.do(
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client,
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device_jid,
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NS_MEDIA_PLAYER,
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action=self._c.ACTION.CANCEL,
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session_id=session_id,
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)
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for opt in mp_options:
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remotes.append(
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(device_jid_s, opt.value, opt.label or opt.value)
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)
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except Exception as e:
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log.warning(
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_(
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"Can't retrieve remote controllers on {device_jid}: "
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"{reason}".format(device_jid=device_jid, reason=e)
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)
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)
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break
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return remotes
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async def do_mpris_command(self, proxy, command):
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iface, command = command.rsplit(".", 1)
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if command == CMD_GO_BACK:
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command = "Seek"
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args = [-SEEK_OFFSET]
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elif command == CMD_GO_FWD:
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command = "Seek"
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args = [SEEK_OFFSET]
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else:
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args = []
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return await self._dbus_async_call(proxy, command, *args, interface=iface)
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def add_mpris_metadata(self, form, metadata):
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"""Serialise MRPIS Metadata according to MPRIS_METADATA_MAP"""
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for mpris_key, name in MPRIS_METADATA_MAP.items():
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if mpris_key in metadata:
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value = str(metadata[mpris_key])
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form.addField(data_form.Field(fieldType="fixed", var=name, value=value))
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async def local_media_cb(self, client, command_elt, session_data, action, node):
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assert txdbus is not None
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try:
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x_elt = next(command_elt.elements(data_form.NS_X_DATA, "x"))
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command_form = data_form.Form.fromElement(x_elt)
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except StopIteration:
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command_form = None
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if command_form is None or len(command_form.fields) == 0:
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# root request, we looks for media players
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bus_names = await self._dbus_list_names()
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bus_names = [b for b in bus_names if b.startswith(MPRIS_PREFIX)]
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if len(bus_names) == 0:
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note = (self._c.NOTE.INFO, D_("No media player found."))
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return (None, self._c.STATUS.COMPLETED, None, note)
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options = []
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status = self._c.STATUS.EXECUTING
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form = data_form.Form(
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"form", title=D_("Media Player Selection"), formNamespace=NS_MEDIA_PLAYER
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)
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for bus in bus_names:
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player_name = bus[len(MPRIS_PREFIX) + 1 :]
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if not player_name:
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log.warning(_("Ignoring MPRIS bus without suffix"))
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continue
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options.append(data_form.Option(bus, player_name))
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field = data_form.Field(
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"list-single", "media_player", options=options, required=True
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)
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form.addField(field)
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payload = form.toElement()
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return (payload, status, None, None)
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else:
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# player request
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try:
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bus_name = command_form["media_player"]
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except KeyError:
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raise ValueError(_("missing media_player value"))
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if not bus_name.startswith(MPRIS_PREFIX):
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log.warning(
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_(
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"Media player ad-hoc command trying to use non MPRIS bus. "
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"Hack attempt? Refused bus: {bus_name}"
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).format(bus_name=bus_name)
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)
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note = (self._c.NOTE.ERROR, D_("Invalid player name."))
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return (None, self._c.STATUS.COMPLETED, None, note)
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try:
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proxy = await self.session_con.getRemoteObject(
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bus_name, MPRIS_PATH, "org.mpris.MediaPlayer2.Player"
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)
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except Exception as e:
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log.warning(_("Can't get D-Bus proxy: {reason}").format(reason=e))
|
|
note = (self._c.NOTE.ERROR, D_("Media player is not available anymore"))
|
|
return (None, self._c.STATUS.COMPLETED, None, note)
|
|
try:
|
|
command = command_form["command"]
|
|
except KeyError:
|
|
pass
|
|
else:
|
|
await self.do_mpris_command(proxy, command)
|
|
|
|
# we construct the remote control form
|
|
form = data_form.Form("form", title=D_("Media Player Selection"))
|
|
form.addField(
|
|
data_form.Field(fieldType="hidden", var="media_player", value=bus_name)
|
|
)
|
|
for iface, properties_names in MPRIS_PROPERTIES.items():
|
|
for name in properties_names:
|
|
try:
|
|
value = await self._dbus_get_property(proxy, iface, name)
|
|
except Exception as e:
|
|
log.warning(
|
|
_("Can't retrieve attribute {name}: {reason}").format(
|
|
name=name, reason=e
|
|
)
|
|
)
|
|
continue
|
|
if name == MPRIS_METADATA_KEY:
|
|
self.add_mpris_metadata(form, value)
|
|
else:
|
|
form.addField(
|
|
data_form.Field(fieldType="fixed", var=name, value=str(value))
|
|
)
|
|
|
|
commands = [data_form.Option(c, c.rsplit(".", 1)[1]) for c in MPRIS_COMMANDS]
|
|
form.addField(
|
|
data_form.Field(
|
|
fieldType="list-single",
|
|
var="command",
|
|
options=commands,
|
|
required=True,
|
|
)
|
|
)
|
|
|
|
payload = form.toElement()
|
|
status = self._c.STATUS.EXECUTING
|
|
return (payload, status, None, None)
|