core, jp: component handling + client handling refactoring:

- SàT can now handle components
    - plugin have now a "modes" key in PLUGIN_INFO where they declare if they can be used with clients and or components. They default to be client only.
    - components are really similar to clients, but with some changes in behaviour:
        * component has "entry point", which is a special plugin with a componentStart method, which is called just after component is connected
        * trigger end with a different suffixes (e.g. profileConnected vs profileConnectedComponent), so a plugin which manage both clients and components can have different workflow
        * for clients, only triggers of plugins handling client mode are launched
        * for components, only triggers of plugins needed in dependencies are launched. They all must handle component mode.
        * component have a sendHistory attribute (False by default) which can be set to True to allow saving sent messages into history
        * for convenience, "client" is still used in method even if it can now be a component
        * a new "component" boolean attribute tells if we have a component or a client
        * components have to add themselve Message protocol
        * roster and presence protocols are not added for components
        * component default port is 5347 (which is Prosody's default port)
    - asyncCreateProfile has been renamed for profileCreate, both to follow new naming convention and to prepare the transition to fully asynchronous bridge
    - createProfile has a new "component" attribute. When used to create a component, it must be set to a component entry point
    - jp: added --component argument to profile/create
    - disconnect bridge method is now asynchronous, this way frontends can know when disconnection is finished
    - new PI_* constants for PLUGIN_INFO values (not used everywhere yet)
    - client/component connection workflow has been moved to their classes instead of being a host methods
    - host.messageSend is now client.sendMessage, and former client.sendMessage is now client.sendMessageData.
    - identities are now handled in client.identities list, so it can be updated dynamically by plugins (in the future, frontends should be able to update them too through bridge)
    - profileConnecting* profileConnected* profileDisconnected* and getHandler now all use client instead of profile

src/plugins/plugin_xep_0085.py

@@ -103,7 +103,7 @@ class XEP_0085(object):
 
         # triggers from core
         host.trigger.add("MessageReceived", self.messageReceivedTrigger)
-        host.trigger.add("messageSend", self.messageSendTrigger)
+        host.trigger.add("sendMessage", self.sendMessageTrigger)
         host.trigger.add("paramUpdateTrigger", self.paramUpdateTrigger)
 
         # args: to_s (jid as string), profile
@@ -113,11 +113,12 @@ class XEP_0085(object):
         # args: from (jid as string), state in CHAT_STATES, profile
         host.bridge.addSignal("chatStateReceived", ".plugin", signature='sss')
 
-    def getHandler(self, profile):
-        return XEP_0085_handler(self, profile)
+    def getHandler(self, client):
+        return XEP_0085_handler(self, client.profile)
 
-    def profileDisconnected(self, profile):
+    def profileDisconnected(self, client):
         """Eventually send a 'gone' state to all one2one contacts."""
+        profile = client.profile
         if profile not in self.map:
             return
         for to_jid in self.map[profile]:
@@ -198,7 +199,7 @@ class XEP_0085(object):
             break
         return True
 
-    def messageSendTrigger(self, client, mess_data, pre_xml_treatments, post_xml_treatments):
+    def sendMessageTrigger(self, client, mess_data, pre_xml_treatments, post_xml_treatments):
         """
         Eventually add the chat state to the message and initiate
         the state machine when sending an "active" state.
@@ -371,7 +372,7 @@ class ChatStateMachine(object):
                     'subject': {},
                     'extra': {},
                     }
-                self.host.generateMessageXML(mess_data)
+                client.generateMessageXML(mess_data)
                 mess_data['xml'].addElement(state, NS_CHAT_STATES)
                 client.send(mess_data['xml'])