grpc/pygui: added grpc alert api, updated pygui to better handle and display alerts

daemon/core/api/grpc/client.py

@@ -445,6 +445,23 @@ class CoreGrpcClient:
         )
         return self.stub.AddSessionServer(request)
 
+    def alert(
+        self,
+        session_id: int,
+        level: core_pb2.ExceptionLevel,
+        source: str,
+        text: str,
+        node_id: int = None,
+    ) -> core_pb2.SessionAlertResponse:
+        request = core_pb2.SessionAlertRequest(
+            session_id=session_id,
+            level=level,
+            source=source,
+            text=text,
+            node_id=node_id,
+        )
+        return self.stub.SessionAlert(request)
+
     def events(
         self,
         session_id: int,

daemon/core/api/grpc/server.py

@@ -109,7 +109,12 @@ from core.api.grpc.wlan_pb2 import (
 )
 from core.emulator.coreemu import CoreEmu
 from core.emulator.data import InterfaceData, LinkData, LinkOptions, NodeOptions
-from core.emulator.enumerations import EventTypes, LinkTypes, MessageFlags
+from core.emulator.enumerations import (
+    EventTypes,
+    ExceptionLevels,
+    LinkTypes,
+    MessageFlags,
+)
 from core.emulator.session import NT, Session
 from core.errors import CoreCommandError, CoreError
 from core.location.mobility import BasicRangeModel, Ns2ScriptedMobility
@@ -584,6 +589,15 @@ class CoreGrpcServer(core_pb2_grpc.CoreApiServicer):
         session.distributed.add_server(request.name, request.host)
         return core_pb2.AddSessionServerResponse(result=True)
 
+    def SessionAlert(
+        self, request: core_pb2.SessionAlertRequest, context: ServicerContext
+    ) -> core_pb2.SessionAlertResponse:
+        session = self.get_session(request.session_id, context)
+        level = ExceptionLevels(request.level)
+        node_id = request.node_id if request.node_id else None
+        session.exception(level, request.source, request.text, node_id)
+        return core_pb2.SessionAlertResponse(result=True)
+
     def Events(self, request: core_pb2.EventsRequest, context: ServicerContext) -> None:
         session = self.get_session(request.session_id, context)
         event_types = set(request.events)