Support for Flic button events

platypush/__init__.py

@@ -106,7 +106,7 @@ class Daemon(object):
         self.bus = Bus(on_message=self.on_message())
 
         # Initialize the backends and link them to the bus
-        self.backends = register_backends(bus=self.bus)
+        self.backends = register_backends(bus=self.bus, global_scope=True)
 
         # Start the backend threads
         for backend in self.backends.values():

platypush/backend/assistant/google/__init__.py

@@ -33,6 +33,7 @@ class AssistantGoogleBackend(Backend):
         with open(self.credentials_file, 'r') as f:
             self.credentials = google.oauth2.credentials.Credentials(token=None,
                                                                      **json.load(f))
+        logging.info('Initialized Google Assistant backend')
 
     def _process_event(self, event):
         logging.info('Received assistant event: {}'.format(event))

platypush/backend/button/flic/__init__.py

@@ -0,0 +1,102 @@
+import importlib
+import logging
+
+from enum import Enum
+from threading import Timer
+from time import time
+
+from platypush.backend import Backend
+from platypush.message.event.button.flic import FlicButtonEvent
+
+from .fliclib.fliclib import FlicClient, ButtonConnectionChannel, ClickType
+
+
+class ButtonFlicBackend(Backend):
+    _long_press_timeout = 0.3
+    _btn_timeout = 0.5
+    ShortPressEvent = "ShortPressEvent"
+    LongPressEvent = "LongPressEvent"
+
+    def __init__(self, server, long_press_timeout=_long_press_timeout,
+                 btn_timeout=_btn_timeout, **kwargs):
+        super().__init__(**kwargs)
+
+        self.server = server
+        self.client = FlicClient(server)
+        self.client.get_info(self._received_info())
+        self.client.on_new_verified_button = self._got_button()
+
+        self._long_press_timeout = long_press_timeout
+        self._btn_timeout = btn_timeout
+        self._btn_timer = None
+        self._btn_addr = None
+        self._down_pressed_time = None
+        self._cur_sequence = []
+
+        logging.info('Initialized Flic buttons backend on {}'.format(self.server))
+
+    def _got_button(self):
+        def _f(bd_addr):
+            cc = ButtonConnectionChannel(bd_addr)
+            cc.on_button_up_or_down = \
+                lambda channel, click_type, was_queued, time_diff: \
+                self._on_event()(bd_addr, channel, click_type, was_queued, time_diff)
+            self.client.add_connection_channel(cc)
+
+        return _f
+
+    def _received_info(self):
+        def _f(items):
+            for bd_addr in items["bd_addr_of_verified_buttons"]:
+                self._got_button()(bd_addr)
+        return _f
+
+    def _on_btn_timeout(self):
+        def _f():
+            logging.info('Flic event triggered from {}: {}'.format(
+                self._btn_addr, self._cur_sequence))
+
+            self.bus.post(FlicButtonEvent(
+                btn_addr=self._btn_addr, sequence=self._cur_sequence))
+
+            self._cur_sequence = []
+
+        return _f
+
+    def _on_event(self):
+        def _f(bd_addr, channel, click_type, was_queued, time_diff):
+            if was_queued:
+                return
+
+            if self._btn_timer:
+                self._btn_timer.cancel()
+
+            if click_type == ClickType.ButtonDown:
+                self._down_pressed_time = time()
+                return
+
+            btn_event = self.ShortPressEvent
+            if self._down_pressed_time:
+                if time() - self._down_pressed_time >= self._long_press_timeout:
+                    btn_event = self.LongPressEvent
+                self._down_pressed_time = None
+
+            self._cur_sequence.append(btn_event)
+
+            self._btn_addr = bd_addr
+            self._btn_timer = Timer(self._btn_timeout, self._on_btn_timeout())
+            self._btn_timer.start()
+
+        return _f
+
+    def send_message(self, msg):
+        pass
+
+    def run(self):
+        super().run()
+
+        self.client.handle_events()
+
+
+# vim:sw=4:ts=4:et:
+

platypush/backend/button/flic/fliclib/aioflic.py

@@ -0,0 +1,554 @@
+"""Flic client library for python
+
+Requires python 3.3 or higher.
+
+For detailed documentation, see the protocol documentation.
+
+Notes on the data type used in this python implementation compared to the protocol documentation:
+All kind of integers are represented as python integers.
+Booleans use the Boolean type.
+Enums use the defined python enums below.
+Bd addr are represented as standard python strings, e.g. "aa:bb:cc:dd:ee:ff".
+"""
+import asyncio
+from enum import Enum
+from collections import namedtuple
+import time
+import struct
+import itertools
+
+class CreateConnectionChannelError(Enum):
+    NoError = 0
+    MaxPendingConnectionsReached = 1
+
+class ConnectionStatus(Enum):
+    Disconnected = 0
+    Connected = 1
+    Ready = 2
+
+class DisconnectReason(Enum):
+    Unspecified = 0
+    ConnectionEstablishmentFailed = 1
+    TimedOut = 2
+    BondingKeysMismatch = 3
+
+class RemovedReason(Enum):
+    RemovedByThisClient = 0
+    ForceDisconnectedByThisClient = 1
+    ForceDisconnectedByOtherClient = 2
+    
+    ButtonIsPrivate = 3
+    VerifyTimeout = 4
+    InternetBackendError = 5
+    InvalidData = 6
+    
+    CouldntLoadDevice = 7
+
+class ClickType(Enum):
+    ButtonDown = 0
+    ButtonUp = 1
+    ButtonClick = 2
+    ButtonSingleClick = 3
+    ButtonDoubleClick = 4
+    ButtonHold = 5
+
+class BdAddrType(Enum):
+    PublicBdAddrType = 0
+    RandomBdAddrType = 1
+
+class LatencyMode(Enum):
+    NormalLatency = 0
+    LowLatency = 1
+    HighLatency = 2
+
+class BluetoothControllerState(Enum):
+    Detached = 0
+    Resetting = 1
+    Attached = 2
+
+class ScanWizardResult(Enum):
+    WizardSuccess = 0
+    WizardCancelledByUser = 1
+    WizardFailedTimeout = 2
+    WizardButtonIsPrivate = 3
+    WizardBluetoothUnavailable = 4
+    WizardInternetBackendError = 5
+    WizardInvalidData = 6
+
+class ButtonScanner:
+    """ButtonScanner class.
+    
+    Usage:
+    scanner = ButtonScanner()
+    scanner.on_advertisement_packet = lambda scanner, bd_addr, name, rssi, is_private, already_verified: ...
+    client.add_scanner(scanner)
+    """
+    
+    _cnt = itertools.count()
+    
+    def __init__(self):
+        self._scan_id = next(ButtonScanner._cnt)
+        self.on_advertisement_packet = lambda scanner, bd_addr, name, rssi, is_private, already_verified: None
+
+class ScanWizard:
+    """ScanWizard class
+    
+    Usage:
+    wizard = ScanWizard()
+    wizard.on_found_private_button = lambda scan_wizard: ...
+    wizard.on_found_public_button = lambda scan_wizard, bd_addr, name: ...
+    wizard.on_button_connected = lambda scan_wizard, bd_addr, name: ...
+    wizard.on_completed = lambda scan_wizard, result, bd_addr, name: ...
+    client.add_scan_wizard(wizard)
+    """
+    
+    _cnt = itertools.count()
+    
+    def __init__(self):
+        self._scan_wizard_id = next(ScanWizard._cnt)
+        self._bd_addr = None
+        self._name = None
+        self.on_found_private_button = lambda scan_wizard: None
+        self.on_found_public_button = lambda scan_wizard, bd_addr, name: None
+        self.on_button_connected = lambda scan_wizard, bd_addr, name: None
+        self.on_completed = lambda scan_wizard, result, bd_addr, name: None
+
+class ButtonConnectionChannel:
+    """ButtonConnectionChannel class.
+    
+    This class represents a connection channel to a Flic button.
+    Add this button connection channel to a FlicClient by executing client.add_connection_channel(connection_channel).
+    You may only have this connection channel added to one FlicClient at a time.
+    
+    Before you add the connection channel to the client, you should set up your callback functions by assigning
+    the corresponding properties to this object with a function. Each callback function has a channel parameter as the first one,
+    referencing this object.
+    
+    Available properties and the function parameters are:
+    on_create_connection_channel_response: channel, error, connection_status
+    on_removed: channel, removed_reason
+    on_connection_status_changed: channel, connection_status, disconnect_reason
+    on_button_up_or_down / on_button_click_or_hold / on_button_single_or_double_click / on_button_single_or_double_click_or_hold: channel, click_type, was_queued, time_diff
+    """
+    
+    _cnt = itertools.count()
+    
+    def __init__(self, bd_addr, latency_mode = LatencyMode.NormalLatency, auto_disconnect_time = 511):
+        self._conn_id = next(ButtonConnectionChannel._cnt)
+        self._bd_addr = bd_addr
+        self._latency_mode = latency_mode
+        self._auto_disconnect_time = auto_disconnect_time
+        self._client = None
+        
+        self.on_create_connection_channel_response = lambda channel, error, connection_status: None
+        self.on_removed = lambda channel, removed_reason: None
+        self.on_connection_status_changed = lambda channel, connection_status, disconnect_reason: None
+        self.on_button_up_or_down = lambda channel, click_type, was_queued, time_diff: None
+        self.on_button_click_or_hold = lambda channel, click_type, was_queued, time_diff: None
+        self.on_button_single_or_double_click = lambda channel, click_type, was_queued, time_diff: None
+        self.on_button_single_or_double_click_or_hold = lambda channel, click_type, was_queued, time_diff: None
+    
+    @property
+    def bd_addr(self):
+        return self._bd_addr
+    
+    @property
+    def latency_mode(self):
+        return self._latency_mode
+    
+    @latency_mode.setter
+    def latency_mode(self, latency_mode):
+        if self._client is None:
+            self._latency_mode = latency_mode
+            return
+        
+        self._latency_mode = latency_mode
+        if not self._client._closed:
+            self._client._send_command("CmdChangeModeParameters", {"conn_id": self._conn_id, "latency_mode": self._latency_mode, "auto_disconnect_time": self._auto_disconnect_time})
+
+    @property
+    def auto_disconnect_time(self):
+        return self._auto_disconnect_time
+    
+    @auto_disconnect_time.setter
+    def auto_disconnect_time(self, auto_disconnect_time):
+        if self._client is None:
+            self._auto_disconnect_time = auto_disconnect_time
+            return
+        
+        self._auto_disconnect_time = auto_disconnect_time
+        if not self._client._closed:
+            self._client._send_command("CmdChangeModeParameters", {"conn_id": self._conn_id, "latency_mode": self._latency_mode, "auto_disconnect_time": self._auto_disconnect_time})
+
+class FlicClient(asyncio.Protocol):
+    """FlicClient class.
+    
+    When this class is constructed, a socket connection is established.
+    You may then send commands to the server and set timers.
+    Once you are ready with the initialization you must call the handle_events() method which is a main loop that never exits, unless the socket is closed.
+    For a more detailed description of all commands, events and enums, check the protocol specification.
+    
+    All commands are wrapped in more high level functions and events are reported using callback functions.
+    
+    All methods called on this class will take effect only if you eventually call the handle_events() method.
+    
+    The ButtonScanner is used to set up a handler for advertisement packets.
+    The ButtonConnectionChannel is used to interact with connections to flic buttons and receive their events.
+    
+    Other events are handled by the following callback functions that can be assigned to this object (and a list of the callback function parameters):
+    on_new_verified_button: bd_addr
+    on_no_space_for_new_connection: max_concurrently_connected_buttons
+    on_got_space_for_new_connection: max_concurrently_connected_buttons
+    on_bluetooth_controller_state_change: state
+    """
+    
+    _EVENTS = [
+        ("EvtAdvertisementPacket", "<I6s17pb??", "scan_id bd_addr name rssi is_private already_verified"),
+        ("EvtCreateConnectionChannelResponse", "<IBB", "conn_id error connection_status"),
+        ("EvtConnectionStatusChanged", "<IBB", "conn_id connection_status disconnect_reason"),
+        ("EvtConnectionChannelRemoved", "<IB", "conn_id removed_reason"),
+        ("EvtButtonUpOrDown", "<IBBI", "conn_id click_type was_queued time_diff"),
+        ("EvtButtonClickOrHold", "<IBBI", "conn_id click_type was_queued time_diff"),
+        ("EvtButtonSingleOrDoubleClick", "<IBBI", "conn_id click_type was_queued time_diff"),
+        ("EvtButtonSingleOrDoubleClickOrHold", "<IBBI", "conn_id click_type was_queued time_diff"),
+        ("EvtNewVerifiedButton", "<6s", "bd_addr"),
+        ("EvtGetInfoResponse", "<B6sBBhBBH", "bluetooth_controller_state my_bd_addr my_bd_addr_type max_pending_connections max_concurrently_connected_buttons current_pending_connections currently_no_space_for_new_connection nb_verified_buttons"),
+        ("EvtNoSpaceForNewConnection", "<B", "max_concurrently_connected_buttons"),
+        ("EvtGotSpaceForNewConnection", "<B", "max_concurrently_connected_buttons"),
+        ("EvtBluetoothControllerStateChange", "<B", "state"),
+        ("EvtPingResponse", "<I", "ping_id"),
+        ("EvtGetButtonUUIDResponse", "<6s16s", "bd_addr uuid"),
+        ("EvtScanWizardFoundPrivateButton", "<I", "scan_wizard_id"),
+        ("EvtScanWizardFoundPublicButton", "<I6s17p", "scan_wizard_id bd_addr name"),
+        ("EvtScanWizardButtonConnected", "<I", "scan_wizard_id"),
+        ("EvtScanWizardCompleted", "<IB", "scan_wizard_id result")
+    ]
+    _EVENT_STRUCTS = list(map(lambda x: None if x == None else struct.Struct(x[1]), _EVENTS))
+    _EVENT_NAMED_TUPLES = list(map(lambda x: None if x == None else namedtuple(x[0], x[2]), _EVENTS))
+    
+    _COMMANDS = [
+        ("CmdGetInfo", "", ""),
+        ("CmdCreateScanner", "<I", "scan_id"),
+        ("CmdRemoveScanner", "<I", "scan_id"),
+        ("CmdCreateConnectionChannel", "<I6sBh", "conn_id bd_addr latency_mode auto_disconnect_time"),
+        ("CmdRemoveConnectionChannel", "<I", "conn_id"),
+        ("CmdForceDisconnect", "<6s", "bd_addr"),
+        ("CmdChangeModeParameters", "<IBh", "conn_id latency_mode auto_disconnect_time"),
+        ("CmdPing", "<I", "ping_id"),
+        ("CmdGetButtonUUID", "<6s", "bd_addr"),
+        ("CmdCreateScanWizard", "<I", "scan_wizard_id"),
+        ("CmdCancelScanWizard", "<I", "scan_wizard_id")
+    ]
+    
+    _COMMAND_STRUCTS = list(map(lambda x: struct.Struct(x[1]), _COMMANDS))
+    _COMMAND_NAMED_TUPLES = list(map(lambda x: namedtuple(x[0], x[2]), _COMMANDS))
+    _COMMAND_NAME_TO_OPCODE = dict((x[0], i) for i, x in enumerate(_COMMANDS))
+
+    
+    def _bdaddr_bytes_to_string(bdaddr_bytes):
+        return ":".join(map(lambda x: "%02x" % x, reversed(bdaddr_bytes)))
+    
+    def _bdaddr_string_to_bytes(bdaddr_string):
+        return bytearray.fromhex("".join(reversed(bdaddr_string.split(":"))))
+    
+    def __init__(self, loop,parent=None):
+        self.loop = loop
+        self.buffer=b""
+        self.transport=None
+        self.parent=parent
+        self._scanners = {}
+        self._scan_wizards = {}
+        self._connection_channels = {}
+        self._closed = False
+        
+        self.on_new_verified_button = lambda bd_addr: None
+        self.on_no_space_for_new_connection = lambda max_concurrently_connected_buttons: None
+        self.on_got_space_for_new_connection = lambda max_concurrently_connected_buttons: None
+        self.on_bluetooth_controller_state_change = lambda state: None    
+        self.on_get_info = lambda items: None
+        self.on_get_button_uuid = lambda addr, uuid: None
+         
+    def connection_made(self, transport):
+        self.transport=transport
+        if self.parent:
+            self.parent.register_protocol(self)
+        
+        
+    def close(self):
+        """Closes the client. The handle_events() method will return."""
+        if self._closed:
+            return
+
+        self._closed = True
+    
+    def add_scanner(self, scanner):
+        """Add a ButtonScanner object.
+        
+        The scan will start directly once the scanner is added.
+        """
+        if scanner._scan_id in self._scanners:
+            return
+        
+        self._scanners[scanner._scan_id] = scanner
+        self._send_command("CmdCreateScanner", {"scan_id": scanner._scan_id})
+    
+    def remove_scanner(self, scanner):
+        """Remove a ButtonScanner object.
+        
+        You will no longer receive advertisement packets.
+        """
+        if scanner._scan_id not in self._scanners:
+            return
+        
+        del self._scanners[scanner._scan_id]
+        self._send_command("CmdRemoveScanner", {"scan_id": scanner._scan_id})
+    
+    def add_scan_wizard(self, scan_wizard):
+        """Add a ScanWizard object.
+        
+        The scan wizard will start directly once the scan wizard is added.
+        """
+        if scan_wizard._scan_wizard_id in self._scan_wizards:
+            return
+        
+        self._scan_wizards[scan_wizard._scan_wizard_id] = scan_wizard
+        self._send_command("CmdCreateScanWizard", {"scan_wizard_id": scan_wizard._scan_wizard_id})
+    
+    def cancel_scan_wizard(self, scan_wizard):
+        """Cancel a ScanWizard.
+        
+        Note: The effect of this command will take place at the time the on_completed event arrives on the scan wizard object.
+        If cancelled due to this command, "result" in the on_completed event will be "WizardCancelledByUser".
+        """
+        if scan_wizard._scan_wizard_id not in self._scan_wizards:
+            return
+        
+        self._send_command("CmdCancelScanWizard", {"scan_wizard_id": scan_wizard._scan_wizard_id})
+    
+    def add_connection_channel(self, channel):
+        """Adds a connection channel to a specific Flic button.
+        
+        This will start listening for a specific Flic button's connection and button events.
+        Make sure the Flic is either in public mode (by holding it down for 7 seconds) or already verified before calling this method.
+        
+        The on_create_connection_channel_response callback property will be called on the
+        connection channel after this command has been received by the server.
+        
+        You may have as many connection channels as you wish for a specific Flic Button.
+        """
+        if channel._conn_id in self._connection_channels:
+            return
+        
+        channel._client = self
+        
+        self._connection_channels[channel._conn_id] = channel
+        self._send_command("CmdCreateConnectionChannel", {"conn_id": channel._conn_id, "bd_addr": channel.bd_addr, "latency_mode": channel._latency_mode, "auto_disconnect_time": channel._auto_disconnect_time})
+    
+    def remove_connection_channel(self, channel):
+        """Remove a connection channel.
+        
+        This will stop listening for new events for a specific connection channel that has previously been added.
+        Note: The effect of this command will take place at the time the on_removed event arrives on the connection channel object.
+        """
+        if channel._conn_id not in self._connection_channels:
+            return
+        
+        self._send_command("CmdRemoveConnectionChannel", {"conn_id": channel._conn_id})
+    
+    def force_disconnect(self, bd_addr):
+        """Force disconnection or cancel pending connection of a specific Flic button.
+        
+        This removes all connection channels for all clients connected to the server for this specific Flic button.
+        """
+        self._send_command("CmdForceDisconnect", {"bd_addr": bd_addr})
+    
+    def get_info(self):
+        """Get info about the current state of the server.
+        
+        The server will send back its information directly and the callback will be called once the response arrives.
+        The callback takes only one parameter: info. This info parameter is a dictionary with the following objects:
+        bluetooth_controller_state, my_bd_addr, my_bd_addr_type, max_pending_connections, max_concurrently_connected_buttons,
+        current_pending_connections, currently_no_space_for_new_connection, bd_addr_of_verified_buttons (a list of bd addresses).
+        """
+        self._send_command("CmdGetInfo", {})
+    
+    def get_button_uuid(self, bd_addr):
+        """Get button uuid for a verified button.
+        
+        The server will send back its information directly and the callback will be called once the response arrives.
+        Responses will arrive in the same order as requested.
+        
+        The callback takes two parameters: bd_addr, uuid (hex string of 32 characters).
+        
+        Note: if the button isn't verified, the uuid sent to the callback will rather be None.
+        """
+        self._send_command("CmdGetButtonUUID", {"bd_addr": bd_addr})
+    
+    
+    def run_on_handle_events_thread(self, callback):
+        """Run a function on the thread that handles the events."""
+        if threading.get_ident() == self._handle_event_thread_ident:
+            callback()
+        else:
+            self.set_timer(0, callback)
+    
+    def _send_command(self, name, items):
+        
+        for key, value in items.items():
+            if isinstance(value, Enum):
+                items[key] = value.value
+        
+        if "bd_addr" in items:
+            items["bd_addr"] = FlicClient._bdaddr_string_to_bytes(items["bd_addr"])
+        
+        opcode = FlicClient._COMMAND_NAME_TO_OPCODE[name]
+        data_bytes = FlicClient._COMMAND_STRUCTS[opcode].pack(*FlicClient._COMMAND_NAMED_TUPLES[opcode](**items))
+        bytes = bytearray(3)
+        bytes[0] = (len(data_bytes) + 1) & 0xff
+        bytes[1] = (len(data_bytes) + 1) >> 8
+        bytes[2] = opcode
+        bytes += data_bytes
+        self.transport.write(bytes)
+    
+    def _dispatch_event(self, data):
+        if len(data) == 0:
+            return
+        opcode = data[0]
+        
+        if opcode >= len(FlicClient._EVENTS) or FlicClient._EVENTS[opcode] == None:
+            return
+        
+        event_name = FlicClient._EVENTS[opcode][0]
+        data_tuple = FlicClient._EVENT_STRUCTS[opcode].unpack(data[1 : 1 + FlicClient._EVENT_STRUCTS[opcode].size])
+        items = FlicClient._EVENT_NAMED_TUPLES[opcode]._make(data_tuple)._asdict()
+        
+        # Process some kind of items whose data type is not supported by struct
+        if "bd_addr" in items:
+            items["bd_addr"] = FlicClient._bdaddr_bytes_to_string(items["bd_addr"])
+        
+        if "name" in items:
+            items["name"] = items["name"].decode("utf-8")
+        
+        if event_name == "EvtCreateConnectionChannelResponse":
+            items["error"] = CreateConnectionChannelError(items["error"])
+            items["connection_status"] = ConnectionStatus(items["connection_status"])
+        
+        if event_name == "EvtConnectionStatusChanged":
+            items["connection_status"] = ConnectionStatus(items["connection_status"])
+            items["disconnect_reason"] = DisconnectReason(items["disconnect_reason"])
+        
+        if event_name == "EvtConnectionChannelRemoved":
+            items["removed_reason"] = RemovedReason(items["removed_reason"])
+        
+        if event_name.startswith("EvtButton"):
+            items["click_type"] = ClickType(items["click_type"])
+        
+        if event_name == "EvtGetInfoResponse":
+            items["bluetooth_controller_state"] = BluetoothControllerState(items["bluetooth_controller_state"])
+            items["my_bd_addr"] = FlicClient._bdaddr_bytes_to_string(items["my_bd_addr"])
+            items["my_bd_addr_type"] = BdAddrType(items["my_bd_addr_type"])
+            items["bd_addr_of_verified_buttons"] = []
+            
+            pos = FlicClient._EVENT_STRUCTS[opcode].size
+            for i in range(items["nb_verified_buttons"]):
+                items["bd_addr_of_verified_buttons"].append(FlicClient._bdaddr_bytes_to_string(data[1 + pos : 1 + pos + 6]))
+                pos += 6
+        
+        if event_name == "EvtBluetoothControllerStateChange":
+            items["state"] = BluetoothControllerState(items["state"])
+        
+        if event_name == "EvtGetButtonUUIDResponse":
+            items["uuid"] = "".join(map(lambda x: "%02x" % x, items["uuid"]))
+            if items["uuid"] == "00000000000000000000000000000000":
+                items["uuid"] = None
+        
+        if event_name == "EvtScanWizardCompleted":
+            items["result"] = ScanWizardResult(items["result"])
+        
+        # Process event
+        if event_name == "EvtAdvertisementPacket":
+            scanner = self._scanners.get(items["scan_id"])
+            if scanner is not None:
+                scanner.on_advertisement_packet(scanner, items["bd_addr"], items["name"], items["rssi"], items["is_private"], items["already_verified"])
+        
+        if event_name == "EvtCreateConnectionChannelResponse":
+            channel = self._connection_channels[items["conn_id"]]
+            if items["error"] != CreateConnectionChannelError.NoError:
+                del self._connection_channels[items["conn_id"]]
+            channel.on_create_connection_channel_response(channel, items["error"], items["connection_status"])
+        
+        if event_name == "EvtConnectionStatusChanged":
+            channel = self._connection_channels[items["conn_id"]]
+            channel.on_connection_status_changed(channel, items["connection_status"], items["disconnect_reason"])
+        
+        if event_name == "EvtConnectionChannelRemoved":
+            channel = self._connection_channels[items["conn_id"]]
+            del self._connection_channels[items["conn_id"]]
+            channel.on_removed(channel, items["removed_reason"])
+        
+        if event_name == "EvtButtonUpOrDown":
+            channel = self._connection_channels[items["conn_id"]]
+            channel.on_button_up_or_down(channel, items["click_type"], items["was_queued"], items["time_diff"])
+        if event_name == "EvtButtonClickOrHold":
+            channel = self._connection_channels[items["conn_id"]]
+            channel.on_button_click_or_hold(channel, items["click_type"], items["was_queued"], items["time_diff"])
+        if event_name == "EvtButtonSingleOrDoubleClick":
+            channel = self._connection_channels[items["conn_id"]]
+            channel.on_button_single_or_double_click(channel, items["click_type"], items["was_queued"], items["time_diff"])
+        if event_name == "EvtButtonSingleOrDoubleClickOrHold":
+            channel = self._connection_channels[items["conn_id"]]
+            channel.on_button_single_or_double_click_or_hold(channel, items["click_type"], items["was_queued"], items["time_diff"])
+        
+        if event_name == "EvtNewVerifiedButton":
+            self.on_new_verified_button(items["bd_addr"])
+        
+        if event_name == "EvtGetInfoResponse":
+            self.on_get_info(items)
+        
+        if event_name == "EvtNoSpaceForNewConnection":
+            self.on_no_space_for_new_connection(items["max_concurrently_connected_buttons"])
+        
+        if event_name == "EvtGotSpaceForNewConnection":
+            self.on_got_space_for_new_connection(items["max_concurrently_connected_buttons"])
+        
+        if event_name == "EvtBluetoothControllerStateChange":
+            self.on_bluetooth_controller_state_change(items["state"])
+        
+        if event_name == "EvtGetButtonUUIDResponse":
+            self.on_get_button_uuid(items["bd_addr"], items["uuid"])
+        
+        if event_name == "EvtScanWizardFoundPrivateButton":
+            scan_wizard = self._scan_wizards[items["scan_wizard_id"]]
+            scan_wizard.on_found_private_button(scan_wizard)
+        
+        if event_name == "EvtScanWizardFoundPublicButton":
+            scan_wizard = self._scan_wizards[items["scan_wizard_id"]]
+            scan_wizard._bd_addr = items["bd_addr"]
+            scan_wizard._name = items["name"]
+            scan_wizard.on_found_public_button(scan_wizard, scan_wizard._bd_addr, scan_wizard._name)
+        
+        if event_name == "EvtScanWizardButtonConnected":
+            scan_wizard = self._scan_wizards[items["scan_wizard_id"]]
+            scan_wizard.on_button_connected(scan_wizard, scan_wizard._bd_addr, scan_wizard._name)
+        
+        if event_name == "EvtScanWizardCompleted":
+            scan_wizard = self._scan_wizards[items["scan_wizard_id"]]
+            del self._scan_wizards[items["scan_wizard_id"]]
+            scan_wizard.on_completed(scan_wizard, items["result"], scan_wizard._bd_addr, scan_wizard._name)
+        
+        
+    def data_received(self,data):
+        cdata=self.buffer+data
+        self.buffer=b""
+        while len(cdata):
+            packet_len = cdata[0] | (cdata[1] << 8)
+            packet_len += 2
+            if len(cdata)>= packet_len:
+                self._dispatch_event(cdata[2:packet_len])
+                cdata=cdata[packet_len:]
+            else:
+                if len(cdata):
+                    self.buffer=cdata #unlikely to happen but.....
+                break
+            
+

platypush/backend/button/flic/fliclib/fliclib.py

@@ -0,0 +1,607 @@
+"""Flic client library for python
+
+Requires python 3.3 or higher.
+
+For detailed documentation, see the protocol documentation.
+
+Notes on the data type used in this python implementation compared to the protocol documentation:
+All kind of integers are represented as python integers.
+Booleans use the Boolean type.
+Enums use the defined python enums below.
+Bd addr are represented as standard python strings, e.g. "aa:bb:cc:dd:ee:ff".
+"""
+
+from enum import Enum
+from collections import namedtuple
+import time
+import socket
+import select
+import struct
+import itertools
+import queue
+import threading
+
+class CreateConnectionChannelError(Enum):
+	NoError = 0
+	MaxPendingConnectionsReached = 1
+
+class ConnectionStatus(Enum):
+	Disconnected = 0
+	Connected = 1
+	Ready = 2
+
+class DisconnectReason(Enum):
+	Unspecified = 0
+	ConnectionEstablishmentFailed = 1
+	TimedOut = 2
+	BondingKeysMismatch = 3
+
+class RemovedReason(Enum):
+	RemovedByThisClient = 0
+	ForceDisconnectedByThisClient = 1
+	ForceDisconnectedByOtherClient = 2
+	
+	ButtonIsPrivate = 3
+	VerifyTimeout = 4
+	InternetBackendError = 5
+	InvalidData = 6
+	
+	CouldntLoadDevice = 7
+
+class ClickType(Enum):
+	ButtonDown = 0
+	ButtonUp = 1
+	ButtonClick = 2
+	ButtonSingleClick = 3
+	ButtonDoubleClick = 4
+	ButtonHold = 5
+
+class BdAddrType(Enum):
+	PublicBdAddrType = 0
+	RandomBdAddrType = 1
+
+class LatencyMode(Enum):
+	NormalLatency = 0
+	LowLatency = 1
+	HighLatency = 2
+
+class BluetoothControllerState(Enum):
+	Detached = 0
+	Resetting = 1
+	Attached = 2
+
+class ScanWizardResult(Enum):
+	WizardSuccess = 0
+	WizardCancelledByUser = 1
+	WizardFailedTimeout = 2
+	WizardButtonIsPrivate = 3
+	WizardBluetoothUnavailable = 4
+	WizardInternetBackendError = 5
+	WizardInvalidData = 6
+
+class ButtonScanner:
+	"""ButtonScanner class.
+	
+	Usage:
+	scanner = ButtonScanner()
+	scanner.on_advertisement_packet = lambda scanner, bd_addr, name, rssi, is_private, already_verified: ...
+	client.add_scanner(scanner)
+	"""
+	
+	_cnt = itertools.count()
+	
+	def __init__(self):
+		self._scan_id = next(ButtonScanner._cnt)
+		self.on_advertisement_packet = lambda scanner, bd_addr, name, rssi, is_private, already_verified: None
+
+class ScanWizard:
+	"""ScanWizard class
+	
+	Usage:
+	wizard = ScanWizard()
+	wizard.on_found_private_button = lambda scan_wizard: ...
+	wizard.on_found_public_button = lambda scan_wizard, bd_addr, name: ...
+	wizard.on_button_connected = lambda scan_wizard, bd_addr, name: ...
+	wizard.on_completed = lambda scan_wizard, result, bd_addr, name: ...
+	client.add_scan_wizard(wizard)
+	"""
+	
+	_cnt = itertools.count()
+	
+	def __init__(self):
+		self._scan_wizard_id = next(ScanWizard._cnt)
+		self._bd_addr = None
+		self._name = None
+		self.on_found_private_button = lambda scan_wizard: None
+		self.on_found_public_button = lambda scan_wizard, bd_addr, name: None
+		self.on_button_connected = lambda scan_wizard, bd_addr, name: None
+		self.on_completed = lambda scan_wizard, result, bd_addr, name: None
+
+class ButtonConnectionChannel:
+	"""ButtonConnectionChannel class.
+	
+	This class represents a connection channel to a Flic button.
+	Add this button connection channel to a FlicClient by executing client.add_connection_channel(connection_channel).
+	You may only have this connection channel added to one FlicClient at a time.
+	
+	Before you add the connection channel to the client, you should set up your callback functions by assigning
+	the corresponding properties to this object with a function. Each callback function has a channel parameter as the first one,
+	referencing this object.
+	
+	Available properties and the function parameters are:
+	on_create_connection_channel_response: channel, error, connection_status
+	on_removed: channel, removed_reason
+	on_connection_status_changed: channel, connection_status, disconnect_reason
+	on_button_up_or_down / on_button_click_or_hold / on_button_single_or_double_click / on_button_single_or_double_click_or_hold: channel, click_type, was_queued, time_diff
+	"""
+	
+	_cnt = itertools.count()
+	
+	def __init__(self, bd_addr, latency_mode = LatencyMode.NormalLatency, auto_disconnect_time = 511):
+		self._conn_id = next(ButtonConnectionChannel._cnt)
+		self._bd_addr = bd_addr
+		self._latency_mode = latency_mode
+		self._auto_disconnect_time = auto_disconnect_time
+		self._client = None
+		
+		self.on_create_connection_channel_response = lambda channel, error, connection_status: None
+		self.on_removed = lambda channel, removed_reason: None
+		self.on_connection_status_changed = lambda channel, connection_status, disconnect_reason: None
+		self.on_button_up_or_down = lambda channel, click_type, was_queued, time_diff: None
+		self.on_button_click_or_hold = lambda channel, click_type, was_queued, time_diff: None
+		self.on_button_single_or_double_click = lambda channel, click_type, was_queued, time_diff: None
+		self.on_button_single_or_double_click_or_hold = lambda channel, click_type, was_queued, time_diff: None
+	
+	@property
+	def bd_addr(self):
+		return self._bd_addr
+	
+	@property
+	def latency_mode(self):
+		return self._latency_mode
+	
+	@latency_mode.setter
+	def latency_mode(self, latency_mode):
+		if self._client is None:
+			self._latency_mode = latency_mode
+			return
+		
+		with self._client._lock:
+			self._latency_mode = latency_mode
+			if not self._client._closed:
+				self._client._send_command("CmdChangeModeParameters", {"conn_id": self._conn_id, "latency_mode": self._latency_mode, "auto_disconnect_time": self._auto_disconnect_time})
+	
+	@property
+	def auto_disconnect_time(self):
+		return self._auto_disconnect_time
+	
+	@auto_disconnect_time.setter
+	def auto_disconnect_time(self, auto_disconnect_time):
+		if self._client is None:
+			self._auto_disconnect_time = auto_disconnect_time
+			return
+		
+		with self._client._lock:
+			self._auto_disconnect_time = auto_disconnect_time
+			if not self._client._closed:
+				self._client._send_command("CmdChangeModeParameters", {"conn_id": self._conn_id, "latency_mode": self._latency_mode, "auto_disconnect_time": self._auto_disconnect_time})
+
+class FlicClient:
+	"""FlicClient class.
+	
+	When this class is constructed, a socket connection is established.
+	You may then send commands to the server and set timers.
+	Once you are ready with the initialization you must call the handle_events() method which is a main loop that never exits, unless the socket is closed.
+	For a more detailed description of all commands, events and enums, check the protocol specification.
+	
+	All commands are wrapped in more high level functions and events are reported using callback functions.
+	
+	All methods called on this class will take effect only if you eventually call the handle_events() method.
+	
+	The ButtonScanner is used to set up a handler for advertisement packets.
+	The ButtonConnectionChannel is used to interact with connections to flic buttons and receive their events.
+	
+	Other events are handled by the following callback functions that can be assigned to this object (and a list of the callback function parameters):
+	on_new_verified_button: bd_addr
+	on_no_space_for_new_connection: max_concurrently_connected_buttons
+	on_got_space_for_new_connection: max_concurrently_connected_buttons
+	on_bluetooth_controller_state_change: state
+	"""
+	
+	_EVENTS = [
+		("EvtAdvertisementPacket", "<I6s17pb??", "scan_id bd_addr name rssi is_private already_verified"),
+		("EvtCreateConnectionChannelResponse", "<IBB", "conn_id error connection_status"),
+		("EvtConnectionStatusChanged", "<IBB", "conn_id connection_status disconnect_reason"),
+		("EvtConnectionChannelRemoved", "<IB", "conn_id removed_reason"),
+		("EvtButtonUpOrDown", "<IBBI", "conn_id click_type was_queued time_diff"),
+		("EvtButtonClickOrHold", "<IBBI", "conn_id click_type was_queued time_diff"),
+		("EvtButtonSingleOrDoubleClick", "<IBBI", "conn_id click_type was_queued time_diff"),
+		("EvtButtonSingleOrDoubleClickOrHold", "<IBBI", "conn_id click_type was_queued time_diff"),
+		("EvtNewVerifiedButton", "<6s", "bd_addr"),
+		("EvtGetInfoResponse", "<B6sBBhBBH", "bluetooth_controller_state my_bd_addr my_bd_addr_type max_pending_connections max_concurrently_connected_buttons current_pending_connections currently_no_space_for_new_connection nb_verified_buttons"),
+		("EvtNoSpaceForNewConnection", "<B", "max_concurrently_connected_buttons"),
+		("EvtGotSpaceForNewConnection", "<B", "max_concurrently_connected_buttons"),
+		("EvtBluetoothControllerStateChange", "<B", "state"),
+		("EvtPingResponse", "<I", "ping_id"),
+		("EvtGetButtonUUIDResponse", "<6s16s", "bd_addr uuid"),
+		("EvtScanWizardFoundPrivateButton", "<I", "scan_wizard_id"),
+		("EvtScanWizardFoundPublicButton", "<I6s17p", "scan_wizard_id bd_addr name"),
+		("EvtScanWizardButtonConnected", "<I", "scan_wizard_id"),
+		("EvtScanWizardCompleted", "<IB", "scan_wizard_id result")
+	]
+	_EVENT_STRUCTS = list(map(lambda x: None if x == None else struct.Struct(x[1]), _EVENTS))
+	_EVENT_NAMED_TUPLES = list(map(lambda x: None if x == None else namedtuple(x[0], x[2]), _EVENTS))
+	
+	_COMMANDS = [
+		("CmdGetInfo", "", ""),
+		("CmdCreateScanner", "<I", "scan_id"),
+		("CmdRemoveScanner", "<I", "scan_id"),
+		("CmdCreateConnectionChannel", "<I6sBh", "conn_id bd_addr latency_mode auto_disconnect_time"),
+		("CmdRemoveConnectionChannel", "<I", "conn_id"),
+		("CmdForceDisconnect", "<6s", "bd_addr"),
+		("CmdChangeModeParameters", "<IBh", "conn_id latency_mode auto_disconnect_time"),
+		("CmdPing", "<I", "ping_id"),
+		("CmdGetButtonUUID", "<6s", "bd_addr"),
+		("CmdCreateScanWizard", "<I", "scan_wizard_id"),
+		("CmdCancelScanWizard", "<I", "scan_wizard_id")
+	]
+	
+	_COMMAND_STRUCTS = list(map(lambda x: struct.Struct(x[1]), _COMMANDS))
+	_COMMAND_NAMED_TUPLES = list(map(lambda x: namedtuple(x[0], x[2]), _COMMANDS))
+	_COMMAND_NAME_TO_OPCODE = dict((x[0], i) for i, x in enumerate(_COMMANDS))
+	
+	def _bdaddr_bytes_to_string(bdaddr_bytes):
+		return ":".join(map(lambda x: "%02x" % x, reversed(bdaddr_bytes)))
+	
+	def _bdaddr_string_to_bytes(bdaddr_string):
+		return bytearray.fromhex("".join(reversed(bdaddr_string.split(":"))))
+	
+	def __init__(self, host, port = 5551):
+		self._sock = socket.create_connection((host, port), None)
+		self._lock = threading.RLock()
+		self._scanners = {}
+		self._scan_wizards = {}
+		self._connection_channels = {}
+		self._get_info_response_queue = queue.Queue()
+		self._get_button_uuid_queue = queue.Queue()
+		self._timers = queue.PriorityQueue()
+		self._handle_event_thread_ident = None
+		self._closed = False
+		
+		self.on_new_verified_button = lambda bd_addr: None
+		self.on_no_space_for_new_connection = lambda max_concurrently_connected_buttons: None
+		self.on_got_space_for_new_connection = lambda max_concurrently_connected_buttons: None
+		self.on_bluetooth_controller_state_change = lambda state: None
+	
+	def close(self):
+		"""Closes the client. The handle_events() method will return."""
+		with self._lock:
+			if self._closed:
+				return
+			
+			if threading.get_ident() != self._handle_event_thread_ident:
+				self._send_command("CmdPing", {"ping_id": 0}) # To unblock socket select
+			
+			self._closed = True
+	
+	def add_scanner(self, scanner):
+		"""Add a ButtonScanner object.
+		
+		The scan will start directly once the scanner is added.
+		"""
+		with self._lock:
+			if scanner._scan_id in self._scanners:
+				return
+			
+			self._scanners[scanner._scan_id] = scanner
+			self._send_command("CmdCreateScanner", {"scan_id": scanner._scan_id})
+	
+	def remove_scanner(self, scanner):
+		"""Remove a ButtonScanner object.
+		
+		You will no longer receive advertisement packets.
+		"""
+		with self._lock:
+			if scanner._scan_id not in self._scanners:
+				return
+			
+			del self._scanners[scanner._scan_id]
+			self._send_command("CmdRemoveScanner", {"scan_id": scanner._scan_id})
+	
+	def add_scan_wizard(self, scan_wizard):
+		"""Add a ScanWizard object.
+		
+		The scan wizard will start directly once the scan wizard is added.
+		"""
+		with self._lock:
+			if scan_wizard._scan_wizard_id in self._scan_wizards:
+				return
+			
+			self._scan_wizards[scan_wizard._scan_wizard_id] = scan_wizard
+			self._send_command("CmdCreateScanWizard", {"scan_wizard_id": scan_wizard._scan_wizard_id})
+	
+	def cancel_scan_wizard(self, scan_wizard):
+		"""Cancel a ScanWizard.
+		
+		Note: The effect of this command will take place at the time the on_completed event arrives on the scan wizard object.
+		If cancelled due to this command, "result" in the on_completed event will be "WizardCancelledByUser".
+		"""
+		with self._lock:
+			if scan_wizard._scan_wizard_id not in self._scan_wizards:
+				return
+			
+			self._send_command("CmdCancelScanWizard", {"scan_wizard_id": scan_wizard._scan_wizard_id})
+	
+	def add_connection_channel(self, channel):
+		"""Adds a connection channel to a specific Flic button.
+		
+		This will start listening for a specific Flic button's connection and button events.
+		Make sure the Flic is either in public mode (by holding it down for 7 seconds) or already verified before calling this method.
+		
+		The on_create_connection_channel_response callback property will be called on the
+		connection channel after this command has been received by the server.
+		
+		You may have as many connection channels as you wish for a specific Flic Button.
+		"""
+		with self._lock:
+			if channel._conn_id in self._connection_channels:
+				return
+			
+			channel._client = self
+			
+			self._connection_channels[channel._conn_id] = channel
+			self._send_command("CmdCreateConnectionChannel", {"conn_id": channel._conn_id, "bd_addr": channel.bd_addr, "latency_mode": channel._latency_mode, "auto_disconnect_time": channel._auto_disconnect_time})
+	
+	def remove_connection_channel(self, channel):
+		"""Remove a connection channel.
+		
+		This will stop listening for new events for a specific connection channel that has previously been added.
+		Note: The effect of this command will take place at the time the on_removed event arrives on the connection channel object.
+		"""
+		with self._lock:
+			if channel._conn_id not in self._connection_channels:
+				return
+			
+			self._send_command("CmdRemoveConnectionChannel", {"conn_id": channel._conn_id})
+	
+	def force_disconnect(self, bd_addr):
+		"""Force disconnection or cancel pending connection of a specific Flic button.
+		
+		This removes all connection channels for all clients connected to the server for this specific Flic button.
+		"""
+		self._send_command("CmdForceDisconnect", {"bd_addr": bd_addr})
+	
+	def get_info(self, callback):
+		"""Get info about the current state of the server.
+		
+		The server will send back its information directly and the callback will be called once the response arrives.
+		The callback takes only one parameter: info. This info parameter is a dictionary with the following objects:
+		bluetooth_controller_state, my_bd_addr, my_bd_addr_type, max_pending_connections, max_concurrently_connected_buttons,
+		current_pending_connections, currently_no_space_for_new_connection, bd_addr_of_verified_buttons (a list of bd addresses).
+		"""
+		self._get_info_response_queue.put(callback)
+		self._send_command("CmdGetInfo", {})
+	
+	def get_button_uuid(self, bd_addr, callback):
+		"""Get button uuid for a verified button.
+		
+		The server will send back its information directly and the callback will be called once the response arrives.
+		Responses will arrive in the same order as requested.
+		
+		The callback takes two parameters: bd_addr, uuid (hex string of 32 characters).
+		
+		Note: if the button isn't verified, the uuid sent to the callback will rather be None.
+		"""
+		with self._lock:
+			self._get_button_uuid_queue.put(callback)
+			self._send_command("CmdGetButtonUUID", {"bd_addr": bd_addr})
+	
+	def set_timer(self, timeout_millis, callback):
+		"""Set a timer
+		
+		This timer callback will run after the specified timeout_millis on the thread that handles the events.
+		"""
+		point_in_time = time.monotonic() + timeout_millis / 1000.0
+		self._timers.put((point_in_time, callback))
+		
+		if threading.get_ident() != self._handle_event_thread_ident:
+			self._send_command("CmdPing", {"ping_id": 0}) # To unblock socket select
+	
+	def run_on_handle_events_thread(self, callback):
+		"""Run a function on the thread that handles the events."""
+		if threading.get_ident() == self._handle_event_thread_ident:
+			callback()
+		else:
+			self.set_timer(0, callback)
+	
+	def _send_command(self, name, items):
+		for key, value in items.items():
+			if isinstance(value, Enum):
+				items[key] = value.value
+		
+		if "bd_addr" in items:
+			items["bd_addr"] = FlicClient._bdaddr_string_to_bytes(items["bd_addr"])
+		
+		opcode = FlicClient._COMMAND_NAME_TO_OPCODE[name]
+		data_bytes = FlicClient._COMMAND_STRUCTS[opcode].pack(*FlicClient._COMMAND_NAMED_TUPLES[opcode](**items))
+		bytes = bytearray(3)
+		bytes[0] = (len(data_bytes) + 1) & 0xff
+		bytes[1] = (len(data_bytes) + 1) >> 8
+		bytes[2] = opcode
+		bytes += data_bytes
+		with self._lock:
+			if not self._closed:
+				self._sock.sendall(bytes)
+	
+	def _dispatch_event(self, data):
+		if len(data) == 0:
+			return
+		opcode = data[0]
+		
+		if opcode >= len(FlicClient._EVENTS) or FlicClient._EVENTS[opcode] == None:
+			return
+		
+		event_name = FlicClient._EVENTS[opcode][0]
+		data_tuple = FlicClient._EVENT_STRUCTS[opcode].unpack(data[1 : 1 + FlicClient._EVENT_STRUCTS[opcode].size])
+		items = FlicClient._EVENT_NAMED_TUPLES[opcode]._make(data_tuple)._asdict()
+		
+		# Process some kind of items whose data type is not supported by struct
+		if "bd_addr" in items:
+			items["bd_addr"] = FlicClient._bdaddr_bytes_to_string(items["bd_addr"])
+		
+		if "name" in items:
+			items["name"] = items["name"].decode("utf-8")
+		
+		if event_name == "EvtCreateConnectionChannelResponse":
+			items["error"] = CreateConnectionChannelError(items["error"])
+			items["connection_status"] = ConnectionStatus(items["connection_status"])
+		
+		if event_name == "EvtConnectionStatusChanged":
+			items["connection_status"] = ConnectionStatus(items["connection_status"])
+			items["disconnect_reason"] = DisconnectReason(items["disconnect_reason"])
+		
+		if event_name == "EvtConnectionChannelRemoved":
+			items["removed_reason"] = RemovedReason(items["removed_reason"])
+		
+		if event_name.startswith("EvtButton"):
+			items["click_type"] = ClickType(items["click_type"])
+		
+		if event_name == "EvtGetInfoResponse":
+			items["bluetooth_controller_state"] = BluetoothControllerState(items["bluetooth_controller_state"])
+			items["my_bd_addr"] = FlicClient._bdaddr_bytes_to_string(items["my_bd_addr"])
+			items["my_bd_addr_type"] = BdAddrType(items["my_bd_addr_type"])
+			items["bd_addr_of_verified_buttons"] = []
+			
+			pos = FlicClient._EVENT_STRUCTS[opcode].size
+			for i in range(items["nb_verified_buttons"]):
+				items["bd_addr_of_verified_buttons"].append(FlicClient._bdaddr_bytes_to_string(data[1 + pos : 1 + pos + 6]))
+				pos += 6
+		
+		if event_name == "EvtBluetoothControllerStateChange":
+			items["state"] = BluetoothControllerState(items["state"])
+		
+		if event_name == "EvtGetButtonUUIDResponse":
+			items["uuid"] = "".join(map(lambda x: "%02x" % x, items["uuid"]))
+			if items["uuid"] == "00000000000000000000000000000000":
+				items["uuid"] = None
+		
+		if event_name == "EvtScanWizardCompleted":
+			items["result"] = ScanWizardResult(items["result"])
+		
+		# Process event
+		if event_name == "EvtAdvertisementPacket":
+			scanner = self._scanners.get(items["scan_id"])
+			if scanner is not None:
+				scanner.on_advertisement_packet(scanner, items["bd_addr"], items["name"], items["rssi"], items["is_private"], items["already_verified"])
+		
+		if event_name == "EvtCreateConnectionChannelResponse":
+			channel = self._connection_channels[items["conn_id"]]
+			if items["error"] != CreateConnectionChannelError.NoError:
+				del self._connection_channels[items["conn_id"]]
+			channel.on_create_connection_channel_response(channel, items["error"], items["connection_status"])
+		
+		if event_name == "EvtConnectionStatusChanged":
+			channel = self._connection_channels[items["conn_id"]]
+			channel.on_connection_status_changed(channel, items["connection_status"], items["disconnect_reason"])
+		
+		if event_name == "EvtConnectionChannelRemoved":
+			channel = self._connection_channels[items["conn_id"]]
+			del self._connection_channels[items["conn_id"]]
+			channel.on_removed(channel, items["removed_reason"])
+		
+		if event_name == "EvtButtonUpOrDown":
+			channel = self._connection_channels[items["conn_id"]]
+			channel.on_button_up_or_down(channel, items["click_type"], items["was_queued"], items["time_diff"])
+		if event_name == "EvtButtonClickOrHold":
+			channel = self._connection_channels[items["conn_id"]]
+			channel.on_button_click_or_hold(channel, items["click_type"], items["was_queued"], items["time_diff"])
+		if event_name == "EvtButtonSingleOrDoubleClick":
+			channel = self._connection_channels[items["conn_id"]]
+			channel.on_button_single_or_double_click(channel, items["click_type"], items["was_queued"], items["time_diff"])
+		if event_name == "EvtButtonSingleOrDoubleClickOrHold":
+			channel = self._connection_channels[items["conn_id"]]
+			channel.on_button_single_or_double_click_or_hold(channel, items["click_type"], items["was_queued"], items["time_diff"])
+		
+		if event_name == "EvtNewVerifiedButton":
+			self.on_new_verified_button(items["bd_addr"])
+		
+		if event_name == "EvtGetInfoResponse":
+			self._get_info_response_queue.get()(items)
+		
+		if event_name == "EvtNoSpaceForNewConnection":
+			self.on_no_space_for_new_connection(items["max_concurrently_connected_buttons"])
+		
+		if event_name == "EvtGotSpaceForNewConnection":
+			self.on_got_space_for_new_connection(items["max_concurrently_connected_buttons"])
+		
+		if event_name == "EvtBluetoothControllerStateChange":
+			self.on_bluetooth_controller_state_change(items["state"])
+		
+		if event_name == "EvtGetButtonUUIDResponse":
+			self._get_button_uuid_queue.get()(items["bd_addr"], items["uuid"])
+		
+		if event_name == "EvtScanWizardFoundPrivateButton":
+			scan_wizard = self._scan_wizards[items["scan_wizard_id"]]
+			scan_wizard.on_found_private_button(scan_wizard)
+		
+		if event_name == "EvtScanWizardFoundPublicButton":
+			scan_wizard = self._scan_wizards[items["scan_wizard_id"]]
+			scan_wizard._bd_addr = items["bd_addr"]
+			scan_wizard._name = items["name"]
+			scan_wizard.on_found_public_button(scan_wizard, scan_wizard._bd_addr, scan_wizard._name)
+		
+		if event_name == "EvtScanWizardButtonConnected":
+			scan_wizard = self._scan_wizards[items["scan_wizard_id"]]
+			scan_wizard.on_button_connected(scan_wizard, scan_wizard._bd_addr, scan_wizard._name)
+		
+		if event_name == "EvtScanWizardCompleted":
+			scan_wizard = self._scan_wizards[items["scan_wizard_id"]]
+			del self._scan_wizards[items["scan_wizard_id"]]
+			scan_wizard.on_completed(scan_wizard, items["result"], scan_wizard._bd_addr, scan_wizard._name)
+	
+	def _handle_one_event(self):
+		if len(self._timers.queue) > 0:
+			current_timer = self._timers.queue[0]
+			timeout = max(current_timer[0] - time.monotonic(), 0)
+			if timeout == 0:
+				self._timers.get()[1]()
+				return True
+			if len(select.select([self._sock], [], [], timeout)[0]) == 0:
+				return True
+		
+		len_arr = bytearray(2)
+		view = memoryview(len_arr)
+		
+		toread = 2
+		while toread > 0:
+			nbytes = self._sock.recv_into(view, toread)
+			if nbytes == 0:
+				return False
+			view = view[nbytes:]
+			toread -= nbytes
+		
+		packet_len = len_arr[0] | (len_arr[1] << 8)
+		data = bytearray(packet_len)
+		view = memoryview(data)
+		toread = packet_len
+		while toread > 0:
+			nbytes = self._sock.recv_into(view, toread)
+			if nbytes == 0:
+				return False
+			view = view[nbytes:]
+			toread -= nbytes
+		
+		self._dispatch_event(data)
+		return True
+		
+	def handle_events(self):
+		"""Start the main loop for this client.
+		
+		This method will not return until the socket has been closed.
+		Once it has returned, any use of this FlicClient is illegal.
+		"""
+		self._handle_event_thread_ident = threading.get_ident()
+		while not self._closed:
+			if not self._handle_one_event():
+				break
+		self._sock.close()

platypush/context/__init__.py

@@ -1,5 +1,6 @@
-import importlib
 import functools
+import importlib
+import logging
 
 from ..config import Config
 
@@ -9,7 +10,7 @@ backends = {}
 # Map: plugin_name -> plugin_instance
 plugins = {}
 
-def register_backends(bus=None, **kwargs):
+def register_backends(bus=None, global_scope=False, **kwargs):
     """ Initialize the backend objects based on the configuration and returns
         a name -> backend_instance map.
     Params:
@@ -19,7 +20,10 @@ def register_backends(bus=None, **kwargs):
         kwargs -- Any additional key-value parameters required to initialize the backends
         """
 
+    if global_scope:
         global backends
+    else:
+        backends = {}
 
     for (name, cfg) in Config.get_backends().items():
         module = importlib.import_module('platypush.backend.' + name)

platypush/event/hook.py

@@ -120,16 +120,24 @@ class EventHook(object):
         return cls(name=name, condition=condition, actions=actions)
 
 
+    def matches_event(self, event):
+        """ Returns an EventMatchResult object containing the information
+            about the match between the event and this hook """
+
+        return event.matches_condition(self.condition)
+
+
     def run(self, event):
         """ Checks the condition of the hook against a particular event and
             runs the hook actions if the condition is met """
 
-        result = event.matches_condition(self.condition)
-        if result[0]:  # is match
+        result = self.matches_event(event)
+
+        if result.is_match:
             logging.info('Running hook {} triggered by an event'.format(self.name))
 
             for action in self.actions:
-                action.execute(**result[1])
+                action.execute(**result.parsed_args)
 
 
 # vim:sw=4:ts=4:et:

platypush/event/processor/__init__.py

@@ -24,7 +24,18 @@ class EventProcessor(object):
     def process_event(self, event):
         """ Processes an event and runs any matched hooks """
 
+        matched_hooks = []
+        max_score = 0
+
         for hook in self.hooks:
+            match = hook.matches_event(event)
+            if match.is_match:
+                if match.score > max_score:
+                    matched_hooks = [hook]
+                elif match.score == max_score:
+                    matched_hooks.append(hook)
+
+        for hook in matched_hooks:
             hook.run(event)
 
 

platypush/message/event/__init__.py

@@ -45,25 +45,24 @@ class Event(Message):
 
     def matches_condition(self, condition):
         """
-        If the event matches an event condition, it will return True and a
-        dictionary containing any parsed arguments, otherwise False and {}
+        If the event matches an event condition, it will return an EventMatchResult
         Params:
             -- condition -- The platypush.event.hook.EventCondition object
         """
 
-        parsed_args = {}
-        if not isinstance(self, condition.type): return [False, parsed_args]
+        result = EventMatchResult(is_match=False)
+        if not isinstance(self, condition.type): return result
 
         for (attr, value) in condition.args.items():
-            # TODO Be more sophisticated, not only simple match options!
             if not hasattr(self.args, attr):
-                return [False, parsed_args]
+                return result
             if isinstance(self.args[attr], str) and not value in self.args[attr]:
-                return [False, parsed_args]
+                return result
             elif self.args[attr] != value:
-                return [False, parsed_args]
+                return result
 
-        return [True, parsed_args]
+        result.is_match = True
+        return result
 
 
     @staticmethod
@@ -92,6 +91,19 @@ class Event(Message):
         })
 
 
+class EventMatchResult(object):
+    """ When comparing an event against an event condition, you want to
+        return this object. It contains the match status (True or False),
+        any parsed arguments, and a match_score that identifies how "strong"
+        the match is - in case of multiple event matches, the ones with the
+        highest score will win """
+
+    def __init__(self, is_match, score=1, parsed_args = {}):
+        self.is_match = is_match
+        self.score = score
+        self.parsed_args = parsed_args
+
+
 # XXX Should be a stop Request, not an Event
 class StopEvent(Event):
     """ StopEvent message. When received on a Bus, it will terminate the

platypush/message/event/assistant/__init__.py

@@ -1,7 +1,7 @@
 import re
 
 from platypush.context import get_backend
-from platypush.message.event import Event
+from platypush.message.event import Event, EventMatchResult
 
 class AssistantEvent(Event):
     """ Base class for assistant events """
@@ -27,11 +27,12 @@ class SpeechRecognizedEvent(AssistantEvent):
         self.recognized_phrase = phrase.strip().lower()
 
     def matches_condition(self, condition):
-        if not isinstance(self, condition.type): return [False, {}]
+        result = EventMatchResult(is_match=False, score=0)
+
+        if not isinstance(self, condition.type): return result
 
         recognized_tokens = re.split('\s+', self.recognized_phrase.strip().lower())
         condition_tokens = re.split('\s+', condition.args['phrase'].strip().lower())
-        parsed_args = {}
 
         while recognized_tokens and condition_tokens:
             rec_token = recognized_tokens[0]
@@ -40,21 +41,23 @@ class SpeechRecognizedEvent(AssistantEvent):
             if rec_token == cond_token:
                 recognized_tokens.pop(0)
                 condition_tokens.pop(0)
+                result.score += 1
             elif re.search(cond_token, rec_token):
                 condition_tokens.pop(0)
             else:
                 m = re.match('^\$([\w\d_])', cond_token)
                 if m:
-                    parsed_args[cond_token[1:]] = rec_token
+                    result.parsed_args[cond_token[1:]] = rec_token
                     recognized_tokens.pop(0)
                     condition_tokens.pop(0)
+                    result.score += 1
                 else:
                     recognized_tokens.pop(0)
 
-        is_match = len(condition_tokens) == 0
-        if is_match and self._assistant: self._assistant.stop_conversation()
+        result.is_match = len(condition_tokens) == 0
+        if result.is_match and self._assistant: self._assistant.stop_conversation()
 
-        return [is_match, parsed_args]
+        return result
 
 
 # vim:sw=4:ts=4:et:

platypush/message/event/button/flic/__init__.py

@@ -0,0 +1,36 @@
+from platypush.message.event import Event, EventMatchResult
+
+
+class FlicButtonEvent(Event):
+    """ Flic button event """
+
+    def __init__(self, btn_addr, sequence, *args, **kwargs):
+        super().__init__(btn_addr=btn_addr, sequence=sequence, *args, **kwargs)
+
+
+    def matches_condition(self, condition):
+        result = EventMatchResult(is_match=False)
+
+        if not isinstance(self, condition.type) \
+                or self.args['btn_addr'] != condition.args['btn_addr']:
+            return result
+
+        cond_sequence = list(condition.args['sequence'])
+        event_sequence = list(self.args['sequence'])
+
+        while cond_sequence and event_sequence:
+            cond_press = cond_sequence[0]
+            event_press = event_sequence[0]
+
+            if cond_press == event_press:
+                cond_sequence.pop(0)
+                result.score += 1
+
+            event_sequence.pop(0)
+
+        result.is_match = len(cond_sequence) == 0
+        return result
+
+
+# vim:sw=4:ts=4:et:
+

platypush/plugins/music/mpd/__init__.py

@@ -26,7 +26,9 @@ class MusicMpdPlugin(MusicPlugin):
         return self._exec('play')
 
     def pause(self):
-        return self._exec('pause')
+        status = self.status().output['state']
+        if status == 'play': return self._exec('pause')
+        else: return self._exec('play')
 
     def stop(self):
         return self._exec('stop')
@@ -40,6 +42,20 @@ class MusicMpdPlugin(MusicPlugin):
     def setvol(self, vol):
         return self._exec('setvol', vol)
 
+    def volup(self, delta=10):
+        volume = int(self.status().output['volume'])
+        new_volume = volume+delta
+        if new_volume <= 100:
+            self.setvol(str(new_volume))
+        return self.status()
+
+    def voldown(self, delta=10):
+        volume = int(self.status().output['volume'])
+        new_volume = volume-delta
+        if new_volume >= 0:
+            self.setvol(str(new_volume))
+        return self.status()
+
     def add(self, content):
         return self._exec('add', content)