Inital version of implememntation

opcua/common/event.py

@@ -76,30 +76,27 @@ class EventGenerator(object):
 
 
 def get_event_from_node(node):
-    event = None
     if node.nodeid.Identifier in ua.uaevents_auto.IMPLEMNTED_EVENTS.keys():
-        event = ua.uaevents_auto.IMPLEMNTED_EVENTS[node.nodeid.Identifier]()
-
+        return ua.uaevents_auto.IMPLEMNTED_EVENTS[node.nodeid.Identifier]()
     else:
-        pass
-        #node.get
-
-        #class CustomEvent():
-
-            #pass
-    #references = node.get_children_descriptions(refs=ua.ObjectIds.HasProperty)
-    #for desc in references:
-        #child = Node(self.isession, desc.NodeId)
-        #setattr(self.event, desc.BrowseName.Name, child.get_value())
-
-    return event
+        parent_identifier, parent_eventtype = _find_parent_eventtype(node)
+        if not parent_eventtype:
+            return None
 
+        class CustomEvent(parent_eventtype):
 
-class CustomEvent(ua.BaseEvent):
+            def __init__(self):
+                super(CustomEvent, self).__init__()
+                curr_node = node
+                while curr_node.nodeid.Identifier != parent_identifier:
+                    properties = curr_node.get_referenced_nodes(refs=ua.ObjectIds.HasProperty, direction=ua.BrowseDirection.Forward)
+                    for prop in properties:
+                        setattr(self, prop.get_browse_name().Name, prop.get_value())
 
-    def __init__(self, etype=ua.BaseEvent, sourcenode=ua.NodeId(ua.ObjectIds.Server), message=None, severity=1):
-        super(CustomEvent, self).__init__(sourcenode, message, severity, True)
-        #TODO: Add fileds
+                    parents = node.get_referenced_nodes(refs=ua.ObjectIds.HasSubtype, direction=ua.BrowseDirection.Inverse, includesubtypes=False)
+                    if len(parents) != 1: # Something went wrong
+                        return None
+                    curr_node = parents[0]
 
             #TODO: Extend to show all fields of CustomEvent
             def __str__(self):
@@ -115,6 +112,23 @@ class CustomEvent(ua.BaseEvent):
                 s += ', Severity:{}'.format(self.Severity)
                 s += ')'
 
+        #class CustomEvent():
 
-        return s
-    __repr__ = __str__
+            #pass
+    #references = node.get_children_descriptions(refs=ua.ObjectIds.HasProperty)
+    #for desc in references:
+        #child = Node(self.isession, desc.NodeId)
+        #setattr(self.event, desc.BrowseName.Name, child.get_value())
+
+    return CustomEvent()
+
+
+def _find_parent_eventtype(node):
+    parents = node.get_referenced_nodes(refs=ua.ObjectIds.HasSubtype, direction=ua.BrowseDirection.Inverse, includesubtypes=False)
+
+    if len(parents) != 1:   # Something went wrong
+        return None
+    if parents[0].nodeid.Identifier in ua.uaevents_auto.IMPLEMNTED_EVENTS.keys():
+        return node.nodeid.Identifier, ua.uaevents_auto.IMPLEMNTED_EVENTS[parents[0].nodeid.Identifier]
+    else:
+        _find_parent_eventtype(parents[0])

opcua/common/manage_nodes.py

@@ -94,34 +94,31 @@ def create_method(parent, *args):
     return _create_method(parent, nodeid, qname, callback, inputs, outputs)
 
 
-def _create_folder(server, parentnodeid, nodeid, qname):
-    addnode = ua.AddNodesItem()
-    addnode.RequestedNewNodeId = nodeid
-    addnode.BrowseName = qname
-    addnode.NodeClass = ua.NodeClass.Object
-    addnode.ParentNodeId = parentnodeid
-    addnode.ReferenceTypeId = ua.NodeId.from_string("i=35")
-    addnode.TypeDefinition = ua.NodeId.from_string("i=61")
-    attrs = ua.ObjectAttributes()
-    attrs.Description = ua.LocalizedText(qname.Name)
-    attrs.DisplayName = ua.LocalizedText(qname.Name)
-    attrs.WriteMask = 0
-    attrs.UserWriteMask = 0
-    attrs.EventNotifier = 0
-    addnode.NodeAttributes = attrs
-    results = server.add_nodes([addnode])
-    results[0].StatusCode.check()
-    return results[0].AddedNodeId
+def create_subtype(parent, *args):
+    """
+    create a child node subtype
+    arguments are nodeid, browsename
+    or namespace index, name
+    """
+    nodeid, qname = _parse_add_args(*args)
+    return node.Node(parent.server, _create_object(parent.server, parent.nodeid, nodeid, qname, None))
 
 
-def _create_object(server, parentnodeid, nodeid, qname):
+def _create_object(server, parentnodeid, nodeid, qname, objecttype):
     addnode = ua.AddNodesItem()
     addnode.RequestedNewNodeId = nodeid
     addnode.BrowseName = qname
     addnode.NodeClass = ua.NodeClass.Object
     addnode.ParentNodeId = parentnodeid
-    addnode.ReferenceTypeId = ua.NodeId.from_string("i=35")
-    addnode.TypeDefinition = ua.NodeId(ua.ObjectIds.BaseObjectType)
+    #TODO: maybe move to address_space.py and implement for all node types?
+    if not objecttype:
+        addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.HasSubtype)
+    else:
+        addnode.TypeDefinition = ua.NodeId(objecttype)
+        if node.Node(server, parentnodeid).get_type_definition() == ua.ObjectIds.FolderType:
+            addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.Organizes)
+        else:
+            addnode.ReferenceTypeId = ua.NodeId(ua.ObjectIds.HasComponent)
     attrs = ua.ObjectAttributes()
     attrs.Description = ua.LocalizedText(qname.Name)
     attrs.DisplayName = ua.LocalizedText(qname.Name)

opcua/common/node.py

@@ -369,6 +369,10 @@ class Node(object):
         from opcua.common import manage_nodes
         return manage_nodes.create_method(*args, **kwargs)
 
+    def add_subtype(*args, **kwargs):
+        from opcua.common import manage_nodes
+        return manage_nodes.create_subtype(*args, **kwargs)
+
     def call_method(*args, **kwargs):
         from opcua.common import methods
         return methods.call_method(*args, **kwargs)

opcua/server/server.py

@@ -329,12 +329,14 @@ class Server(object):
         """
         return EventGenerator(self.iserver.isession, etype, source)
 
-    def create_custom_event(self, name, baseetype=ua.ObjectIds.BaseEventType, properties=[]):
+    def create_custom_event(self, idx, name, baseetype=ua.ObjectIds.BaseEventType, properties=[]):
 
-        base_event = self.get_node(baseetype)
-        custom_event = base_event.add_object(name)
+        base_event = self.get_node(ua.NodeId(baseetype))
+        custom_event = base_event.add_subtype(idx, name)
         for property in properties:
-            custom_event.add_property(property[0], property[1])
+            custom_event.add_property(idx, property[0], ua.Variant(None, property[1]))
+
+        return custom_event
 
     def import_xml(self, path):
         """

tests/tests_server.py

@@ -142,6 +142,17 @@ class TestServer(unittest.TestCase, CommonTests):
         ev = opcua.common.event.get_event_from_node(opcua.Node(self.opc.iserver.isession, ua.NodeId(ua.ObjectIds.BaseEventType)))
         check_base_event(self, ev)
 
+    def test_create_custom_event(self):
+        event = self.opc.create_custom_event(2, 'MyEvent', ua.ObjectIds.BaseEventType, [('PropertyNum', ua.VariantType.Float), ('PropertyString', ua.VariantType.String)])
+
+        base = opcua.Node(self.opc.iserver.isession, ua.NodeId(ua.ObjectIds.BaseEventType))
+        self.assertTrue(event in base.get_children())
+        nodes = event.get_referenced_nodes(refs=ua.ObjectIds.HasSubtype, direction=ua.BrowseDirection.Inverse, includesubtypes=False)
+        self.assertEqual(base, nodes[0])
+        properties = event.get_properties()
+        self.assertIsNot(properties, None)
+
+
     def test_get_event_from_node_CustomEvent(self):
         ev = opcua.common.event.get_event_from_node(opcua.Node(self.opc.iserver.isession, ua.NodeId(ua.ObjectIds.AuditEventType)))
         check_base_event(self, ev)