Maksim Melnikau aka “max_posedon” - Telepathy protocol example

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This document provides an example of implementing a Telepathy Echo Protocol in Python. It describes creating a protocol class, connection manager class, connection class, channel manager class, and text channel class to handle connections, contacts, chat channels, and sending/receiving messages. The code uses Telepathy, Telepathy-Python, and D-Bus for inter-process communication and defining the protocol interfaces. More information and code examples can be found on the author's GitHub pages.

Technology Entertainment & Humor

Telepathy Echo Protocol Example
Maksim Melnikau (max posedon)
Linux Mobile hobbyist
World of Tanks developer
January 26, 2013

Let’s start
python
gobject
telepathy
telepathy-python
telepathy-foo
DBusGMainLoop(set_as_default=True)
FooConnectionManager()
MainLoop().run()

org.freedesktop.Telepathy.Protocol
Properties
EnglishName
Parameters
VCardField
Icon

$class Protocol foo/protocol.py class Protocol: _proto = PROTOCOL _english_name = PROTOCOL.capitalize() _icon = "im-%s" % PROTOCOL _vcard_field = "im-%s" % PROTOCOL _mandatory_parameters = {’account’: ’s’} def create_connection(self, connection_manager, parameters): return FooConnection(self, connection_manager, parameters)$

org.freedesktop.Telepathy.ConnectionManager
Methods
GetParameters
ListProtocols
RequestConnection
Signals
NewConnections
Properties
Protocols
Interfaceds

class FooConnectionManager
foo/connection manager.py
class FooConnectionManager:
def __init__(self):
self._implement_protocol(PROTOCOL, FooProtocol)

org.freedesktop.Telepathy.Connection
Methods
Connect
Disconnect
Properties
Status
Interfaces
Signals
StatusChanged

org.freedesktop.Telepathy.Connection.Interface.Contacts
Methods
GetContactAttributes
Properties
ContactAttributeInterfaces

org.freedesktop.Telepathy.Connection.Interface.Requests
Methods
CreateChannel
Properties
Channels
RequestableChannelClasses

$class Connection foo/connection.py class FooConnection: def Connect(self): self.StatusChanged(CONNECTION_STATUS_CONNECTED, CONNECTION_STATUS_REASON_REQUESTED) def Disconnect(self): self.StatusChanged(CONNECTION_STATUS_DISCONNECTED, CONNECTION_STATUS_REASON_REQUESTED) def GetContactListAttributes(self, interfaces, hold): ret = Dictionary(signature=’ua{sv}’) ... return ret$

org.freedesktop.Telepathy.Channel
Properties
ChannelType
Interfaces

class FooChannelManager
foo/channel manager.py
class FooChannelManager:
def __init__(self, connection, protocol):
self.implement_channel_classes(CHANNEL_TYPE_TEXT,
self._get_text_channel)
def _get_text_channel(self, props):
self.__text_channel_id += 1
path = "TextChannel%d" % self.__text_channel_id
return FooTextChannel(self._conn,
self, props, object_path=path)

org.freedesktop.Telepathy.Channel.Type.Text
Methods
AcknowledgePendingMessages

org.freedesktop.Telepathy.Channel.Interface.Messages
Methods
SendMessage
Signals
MessageSent
MessageReceived
Properties
SupportedContentType
PendingMessages

class FooTextChannel
foo/channel/text.py
class FooTextChannel:
def SendMessage(self, message, flags):
gobject.timeout_add(50, self._send_message,
message, flags, token)
def _send_message(self, message, flags, token):
self.MessageSent(message, flags, token)
gobject.timeout_add(50, self._message_received,
str(message[1][’content’]))
def _message_received(self, msg):
self.MessageReceived(message)

More Info
email: maxposedon@gmail.com
https://github.com/max-posedon/telepathy-foo
https://github.com/max-posedon/telepathy-python
https://github.com/max-posedon/talk-telepathy-echo

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