core: reuse existing service client UIDs for all service bots

This prevents nick collision wars caused by spawn_service when an ENDBURST hook for the uplink is received multiple times.

classes.py

@@ -468,16 +468,13 @@ class PyLinkNetworkCore(structures.DeprecatedAttributesObject, structures.CamelC
         if not userobj:
             return False
 
-        # Look for the "service" attribute in the User object, if one exists.
-        try:
-            sname = userobj.service
+        # Look for the "service" attribute in the User object,sname = userobj.service
         # Warn if the service name we fetched isn't a registered service.
+        sname = userobj.service
         if sname not in world.services.keys():
             log.warning("(%s) User %s / %s had a service bot record to a service that doesn't "
                         "exist (%s)!", self.name, uid, userobj.nick, sname)
         return world.services.get(sname)
-        except AttributeError:
-            return False
 
 structures._BLACKLISTED_COPY_TYPES.append(PyLinkNetworkCore)
 
@@ -1596,6 +1593,9 @@ class User():
         # Cloaked host for IRCds that use it
         self.cloaked_host = None
 
+        # Stores service bot name if applicable
+        self.service = None
+
     def __repr__(self):
         return 'User(%s/%s)' % (self.uid, self.nick)
 IrcUser = User

coremods/service_support.py

@@ -22,10 +22,11 @@ def spawn_service(irc, source, command, args):
     # Get the ServiceBot object.
     sbot = world.services[name]
 
-    if name == 'pylink' and irc.pseudoclient:
-        # irc.pseudoclient already exists, for protocols like clientbot
-        log.debug('(%s) spawn_service: Using existing nick %r for service %r', irc.name, irc.pseudoclient.nick, name)
-        userobj = irc.pseudoclient
+    old_userobj = irc.users.get(sbot.uids.get(irc.name))
+    if old_userobj and old_userobj.service:
+        # A client already exists, so reuse it.
+        log.debug('(%s) spawn_service: Using existing nick %r for service %r', irc.name, old_userobj.nick, name)
+        userobj = old_userobj
         userobj.opertype = "PyLink Service"
         userobj.manipulatable = sbot.manipulatable
     else: