From ed7c2a6a73f24f97a0f04c2e6be6862ffe54b585 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Tue, 21 Feb 2023 01:25:34 +0000
Subject: Support for loading objects, uses and model factories from an XML
 resource

---
 assetFactory/modelFactory.cpp | 17 +++++++++++++++++
 assetFactory/modelFactory.h   |  9 ++++++++-
 assetFactory/object.cpp       | 22 ++++++++++++++++++++++
 assetFactory/object.h         | 13 ++++++++++++-
 assetFactory/use.cpp          | 20 ++++++++++++++++++++
 assetFactory/use.h            | 12 +++++++++++-
 6 files changed, 90 insertions(+), 3 deletions(-)

(limited to 'assetFactory')

diff --git a/assetFactory/modelFactory.cpp b/assetFactory/modelFactory.cpp
index 4c25e48..2642900 100644
--- a/assetFactory/modelFactory.cpp
+++ b/assetFactory/modelFactory.cpp
@@ -2,7 +2,10 @@
 #include "cuboid.h"
 #include "cylinder.h"
 #include "modelFactoryMesh_fwd.h"
+#include "object.h"
 #include "plane.h"
+#include "saxParse-persistence.h"
+#include <filesystem.h>
 
 ModelFactory::ModelFactory() :
 	shapes {
@@ -12,3 +15,17 @@ ModelFactory::ModelFactory() :
 	}
 {
 }
+
+std::shared_ptr<ModelFactory>
+ModelFactory::loadXML(const std::filesystem::path & filename)
+{
+	filesystem::FileStar file {filename.c_str(), "r"};
+	return Persistence::SAXParsePersistence {}.loadState<std::shared_ptr<ModelFactory>>(file);
+}
+
+bool
+ModelFactory::persist(Persistence::PersistenceStore & store)
+{
+	using MapObjects = Persistence::MapByMember<Shapes, Object>;
+	return STORE_TYPE && STORE_NAME_HELPER("object", shapes, MapObjects);
+}
diff --git a/assetFactory/modelFactory.h b/assetFactory/modelFactory.h
index f2b1b48..94db055 100644
--- a/assetFactory/modelFactory.h
+++ b/assetFactory/modelFactory.h
@@ -1,12 +1,19 @@
 #pragma once
 
+#include "persistence.h"
 #include "shape.h"
+#include <filesystem>
 
-class ModelFactory {
+class ModelFactory : public Persistence::Persistable {
 public:
 	using Shapes = std::map<std::string, Shape::CPtr, std::less<>>;
 
 	ModelFactory();
+	[[nodiscard]] static std::shared_ptr<ModelFactory> loadXML(const std::filesystem::path &);
 
 	Shapes shapes;
+
+private:
+	friend Persistence::SelectionPtrBase<std::shared_ptr<ModelFactory>, true>;
+	bool persist(Persistence::PersistenceStore & store) override;
 };
diff --git a/assetFactory/object.cpp b/assetFactory/object.cpp
index 8b70676..faa9a17 100644
--- a/assetFactory/object.cpp
+++ b/assetFactory/object.cpp
@@ -15,3 +15,25 @@ Object::createMesh(ModelFactoryMesh & mesh, const Mutation::Matrix & mutation) c
 	}
 	return faces;
 }
+
+template<typename Container, typename Type> struct Appender : public Persistence::SelectionT<std::shared_ptr<Type>> {
+	Appender(Container & c) : Persistence::SelectionT<std::shared_ptr<Type>> {s}, container {c} { }
+	using Persistence::SelectionT<std::shared_ptr<Type>>::SelectionT;
+	void
+	endObject(Persistence::Stack & stk) override
+	{
+		container.emplace_back(s);
+		stk.pop();
+	}
+
+private:
+	std::shared_ptr<Type> s;
+	Container & container;
+};
+
+bool
+Object::persist(Persistence::PersistenceStore & store)
+{
+	using UseAppend = Appender<Use::Collection, Use>;
+	return STORE_TYPE && STORE_MEMBER(id) && STORE_NAME_HELPER("use", uses, UseAppend);
+}
diff --git a/assetFactory/object.h b/assetFactory/object.h
index da28c1f..1069f66 100644
--- a/assetFactory/object.h
+++ b/assetFactory/object.h
@@ -1,15 +1,26 @@
 #pragma once
 
+#include "persistence.h"
 #include "shape.h"
 #include "stdTypeDefs.hpp"
 #include "use.h"
 
-class Object : public StdTypeDefs<Object>, public Shape {
+class Object : public StdTypeDefs<Object>, public Shape, public Persistence::Persistable {
 public:
+	Object() = default;
 	Object(std::string i);
 
 	CreatedFaces createMesh(ModelFactoryMesh & mesh, const Mutation::Matrix & mutation) const override;
 
 	Use::Collection uses;
 	std::string id;
+
+private:
+	friend Persistence::SelectionPtrBase<std::shared_ptr<Object>, true>;
+	bool persist(Persistence::PersistenceStore & store) override;
+	std::string
+	getId() const override
+	{
+		return id;
+	};
 };
diff --git a/assetFactory/use.cpp b/assetFactory/use.cpp
index d191329..21e26f3 100644
--- a/assetFactory/use.cpp
+++ b/assetFactory/use.cpp
@@ -1,4 +1,5 @@
 #include "use.h"
+#include "modelFactory.h"
 
 Shape::CreatedFaces
 Use::createMesh(ModelFactoryMesh & mesh, const Mutation::Matrix & mutation) const
@@ -9,3 +10,22 @@ Use::createMesh(ModelFactoryMesh & mesh, const Mutation::Matrix & mutation) cons
 	}
 	return faces;
 }
+
+struct Lookup : public Persistence::SelectionV<Shape::CPtr> {
+	using Persistence::SelectionV<Shape::CPtr>::SelectionV;
+	using Persistence::SelectionV<Shape::CPtr>::setValue;
+	void
+	setValue(std::string && str) override
+	{
+		if (auto mf = std::dynamic_pointer_cast<const ModelFactory>(Persistence::sharedObjects.at("modelFactory"))) {
+			v = mf->shapes.at(str);
+		}
+	}
+};
+
+bool
+Use::persist(Persistence::PersistenceStore & store)
+{
+	return STORE_TYPE && STORE_HELPER(type, Lookup) && STORE_MEMBER(position) && STORE_MEMBER(scale)
+			&& STORE_MEMBER(rotation);
+}
diff --git a/assetFactory/use.h b/assetFactory/use.h
index 28f5459..96f07f6 100644
--- a/assetFactory/use.h
+++ b/assetFactory/use.h
@@ -2,10 +2,11 @@
 
 #include "faceController.h"
 #include "modelFactoryMesh_fwd.h"
+#include "persistence.h"
 #include "shape.h"
 #include "stdTypeDefs.hpp"
 
-class Use : public StdTypeDefs<Use>, public Mutation {
+class Use : public StdTypeDefs<Use>, public Mutation, public Persistence::Persistable {
 public:
 	using FaceControllers = std::map<std::string, FaceController>;
 
@@ -14,4 +15,13 @@ public:
 	Shape::CPtr type;
 	std::string colour;
 	FaceControllers faceControllers;
+
+private:
+	friend Persistence::SelectionPtrBase<std::shared_ptr<Use>, true>;
+	bool persist(Persistence::PersistenceStore & store) override;
+	std::string
+	getId() const override
+	{
+		return {};
+	};
 };
-- 
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