fix: Nested messages (#2148)

* test for nested messages

* fixing StackOverflow with nested types

Assets/Mirror/Editor/Weaver/Weaver.cs

@@ -24,6 +24,8 @@ class WeaverLists
 
         // amount of SyncVars per class. dict<className, amount>
         public Dictionary<string, int> numSyncVars = new Dictionary<string, int>();
+
+        public HashSet<string> ProcessedMessages = new HashSet<string>();
     }
 
     internal static class Weaver
@@ -170,12 +172,15 @@ static bool WeaveMessage(TypeDefinition td)
             if (!td.IsClass)
                 return false;
 
+            // already processed
+            if (WeaveLists.ProcessedMessages.Contains(td.FullName))
+                return false;
+
             bool modified = false;
 
             if (td.ImplementsInterface(WeaverTypes.IMessageBaseType))
             {
                 // process this and base classes from parent to child order
-
                 try
                 {
                     TypeDefinition parent = td.BaseType.Resolve();
@@ -190,10 +195,12 @@ static bool WeaveMessage(TypeDefinition td)
 
                 // process this
                 MessageClassProcessor.Process(td);
+                WeaveLists.ProcessedMessages.Add(td.FullName);
                 modified = true;
             }
 
             // check for embedded types
+            // inner classes should be processed after outter class to avoid StackOverflowException
             foreach (TypeDefinition embedded in td.NestedTypes)
             {
                 modified |= WeaveMessage(embedded);

Assets/Mirror/Tests/Editor/Weaver/.WeaverTests.csproj

@@ -83,7 +83,6 @@
     <Compile Include="GeneratedReaderWriter~\GivesErrorWhenUsingUnityAsset.cs" />
     <Compile Include="WeaverClientRpcTests~\AbstractClientRpc.cs" />
     <Compile Include="WeaverClientRpcTests~\ClientRpcCantBeStatic.cs" />
-    <Compile Include="WeaverClientRpcTests~\ClientRpcStartsWithRpc.cs" />
     <Compile Include="WeaverClientRpcTests~\ClientRpcThatExcludesOwner.cs" />
     <Compile Include="WeaverClientRpcTests~\ClientRpcValid.cs" />
     <Compile Include="WeaverClientRpcTests~\OverrideAbstractClientRpc.cs" />
@@ -93,7 +92,6 @@
     <Compile Include="WeaverClientServerAttributeTests~\NetworkBehaviourServer.cs" />
     <Compile Include="WeaverCommandTests~\AbstractCommand.cs" />
     <Compile Include="WeaverCommandTests~\CommandCantBeStatic.cs" />
-    <Compile Include="WeaverCommandTests~\CommandStartsWithCmd.cs" />
     <Compile Include="WeaverCommandTests~\CommandThatIgnoresAuthority.cs" />
     <Compile Include="WeaverCommandTests~\CommandThatIgnoresAuthorityWithSenderConnection.cs" />
     <Compile Include="WeaverCommandTests~\CommandValid.cs" />
@@ -111,6 +109,7 @@
     <Compile Include="WeaverGeneralTests~\TestingScriptableObjectArraySerialization.cs" />
     <Compile Include="WeaverMessageTests~\MessageMemberGeneric.cs" />
     <Compile Include="WeaverMessageTests~\MessageMemberInterface.cs" />
+    <Compile Include="WeaverMessageTests~\MessageNestedInheritance.cs" />
     <Compile Include="WeaverMessageTests~\MessageSelfReferencing.cs" />
     <Compile Include="WeaverMessageTests~\MessageValid.cs" />
     <Compile Include="WeaverMessageTests~\MessageWithBaseClass.cs" />
@@ -232,7 +231,6 @@
     <Compile Include="WeaverSyncVarTests~\SyncVarsSyncList.cs" />
     <Compile Include="WeaverSyncVarTests~\SyncVarsValid.cs" />
     <Compile Include="WeaverSyncEventTests~\ErrorWhenSyncEventUsesGenericParameter.cs" />
-    <Compile Include="WeaverSyncEventTests~\ErrorWhenSyncEventDoesntStartWithEvent.cs" />
     <Compile Include="WeaverSyncEventTests~\SyncEventValid.cs" />
     <Compile Include="WeaverTargetRpcTests~\AbstractTargetRpc.cs" />
     <Compile Include="WeaverTargetRpcTests~\ErrorWhenTargetRpcIsStatic.cs" />
@@ -241,7 +239,6 @@
     <Compile Include="WeaverTargetRpcTests~\TargetRpcCanHaveOtherParametersWhileSkipingNetworkConnection.cs" />
     <Compile Include="WeaverTargetRpcTests~\TargetRpcCanSkipNetworkConnection.cs" />
     <Compile Include="WeaverTargetRpcTests~\ErrorWhenNetworkConnectionIsNotTheFirstParameter.cs" />
-    <Compile Include="WeaverTargetRpcTests~\ErrorWhenMethodDoesNotStartWithTarget.cs" />
     <Compile Include="WeaverTargetRpcTests~\TargetRpcValid.cs" />
     <Compile Include="WeaverTargetRpcTests~\VirtualTargetRpc.cs" />
     <Reference Include="UnityEngine.CoreModule">

Assets/Mirror/Tests/Editor/Weaver/WeaverMessageTests.cs

@@ -35,5 +35,12 @@ public void MessageMemberInterface()
             Assert.That(weaverErrors, Contains.Item("Cannot generate writer for interface SuperCoolInterface. Use a supported type or provide a custom writer (at WeaverMessageTests.MessageMemberInterface.SuperCoolInterface)"));
             Assert.That(weaverErrors, Contains.Item("invalidField has unsupported type (at WeaverMessageTests.MessageMemberInterface.SuperCoolInterface WeaverMessageTests.MessageMemberInterface.MessageMemberInterface::invalidField)"));
         }
+
+        [Test]
+        public void MessageNestedInheritance()
+        {
+            Assert.That(weaverErrors, Is.Empty);
+        }
     }
 }
+

Assets/Mirror/Tests/Editor/Weaver/WeaverMessageTests~/MessageNestedInheritance.cs

@@ -0,0 +1,17 @@
+using Mirror;
+
+namespace WeaverMessageTests.MessageNestedInheritance
+{
+    public class Message : MessageBase
+    {
+        public class Request : Message
+        {
+
+        }
+
+        public class Response : Message
+        {
+            public int errorCode;
+        }
+    }
+}