From f777c049c67ee3d1ca8886362cfe688b14135a26 Mon Sep 17 00:00:00 2001
From: Jan <jan@laupetin.net>
Date: Thu, 14 Nov 2019 14:53:12 +0100
Subject: [PATCH] ZoneCodeGenerator: Add postprocessor to inspect whether a
 structure is a leaf (No complex tasks for loading/writing required, like
 pointers, strings, scriptstrings)

---
 .../Information/StructureInformation.cs       |  2 +
 .../Parsing/CommandFile/CommandFileReader.cs  |  1 +
 .../PostProcessor/PostProcessorLeafs.cs       | 58 +++++++++++++++++++
 3 files changed, 61 insertions(+)
 create mode 100644 src/ZoneCodeGenerator/Parsing/CommandFile/PostProcessor/PostProcessorLeafs.cs

diff --git a/src/ZoneCodeGenerator/Domain/Information/StructureInformation.cs b/src/ZoneCodeGenerator/Domain/Information/StructureInformation.cs
index 532df051..2b917bcb 100644
--- a/src/ZoneCodeGenerator/Domain/Information/StructureInformation.cs
+++ b/src/ZoneCodeGenerator/Domain/Information/StructureInformation.cs
@@ -30,6 +30,8 @@ namespace ZoneCodeGenerator.Domain.Information
         public bool ArrayPointerReferenceExists { get; set; }
         public bool ArrayReferenceExists { get; set; }
 
+        public bool IsLeaf { get; set; }
+
         public bool HasNameMember => Type.Members.Any(variable => variable.Name.Equals("name", StringComparison.CurrentCultureIgnoreCase));
         
         public StructureInformation(DataTypeWithMembers type)
diff --git a/src/ZoneCodeGenerator/Parsing/CommandFile/CommandFileReader.cs b/src/ZoneCodeGenerator/Parsing/CommandFile/CommandFileReader.cs
index 506552c0..089376a8 100644
--- a/src/ZoneCodeGenerator/Parsing/CommandFile/CommandFileReader.cs
+++ b/src/ZoneCodeGenerator/Parsing/CommandFile/CommandFileReader.cs
@@ -15,6 +15,7 @@ namespace ZoneCodeGenerator.Parsing.CommandFile
         {
             new PostProcessorDefaultBlock(),
             new PostProcessorUsages(),
+            new PostProcessorLeafs()
         };
 
         public static bool ReadFile(string path, CUISession session, bool verbose = false)
diff --git a/src/ZoneCodeGenerator/Parsing/CommandFile/PostProcessor/PostProcessorLeafs.cs b/src/ZoneCodeGenerator/Parsing/CommandFile/PostProcessor/PostProcessorLeafs.cs
new file mode 100644
index 00000000..0ef37ab1
--- /dev/null
+++ b/src/ZoneCodeGenerator/Parsing/CommandFile/PostProcessor/PostProcessorLeafs.cs
@@ -0,0 +1,58 @@
+using System.Linq;
+using ZoneCodeGenerator.Domain;
+using ZoneCodeGenerator.Domain.Information;
+using ZoneCodeGenerator.Persistence;
+
+namespace ZoneCodeGenerator.Parsing.CommandFile.PostProcessor
+{
+    class PostProcessorLeafs : IDataPostProcessor
+    {
+        private static bool IsLeaf(StructureInformation structureInformation)
+        {
+            foreach (var member in structureInformation.OrderedMembers)
+            {
+                // If there is a condition to this member and it always evaluates to false: Skip this member
+                if (member.Condition != null && member.Condition.IsStatic && member.Condition.EvaluateNumeric() == 0)
+                    continue;
+
+                // Any ScriptStrings or Strings need to be processed.
+                if (member.IsScriptString
+                    || member.IsString)
+                    return false;
+
+                // If there are any Pointer members that are not always count 0 it needs to be processed.
+                var hasNoPointerMembers = member.Member.VariableType.References.OfType<ReferenceTypePointer>().All(pointer =>
+                {
+                    if (!pointer.Count.IsStatic)
+                        return false;
+
+                    return pointer.Count.EvaluateNumeric() == 0;
+                });
+
+                if (!hasNoPointerMembers)
+                    return false;
+
+                if (member.StructureType != null
+                    && member.StructureType != structureInformation
+                    && !IsLeaf(member.StructureType))
+                    return false;
+            }
+
+            return true;
+        }
+
+        public bool PostProcess(IDataRepository repository)
+        {
+            foreach (var dataTypeWithMembers in repository.GetAllStructs()
+                .AsEnumerable<DataTypeWithMembers>()
+                .Concat(repository.GetAllUnions()))
+            {
+                var information = repository.GetInformationFor(dataTypeWithMembers);
+
+                information.IsLeaf = IsLeaf(information);
+            }
+
+            return true;
+        }
+    }
+}
\ No newline at end of file