Adds serialization base classes

Adds file writing to BinaryFileBuffer

docs/tasks/core.todo

@@ -8,10 +8,10 @@ Build System:
 
 Core:
     ☐ Figure out how to represent Unique Entities and entity instances - and how this will work with UUIDs @critical
-    ☐ Implement generic serializeation system
-        ☐ JSON serializeable base class
-            ☐ JSON implementions should be stubbed out in non-editor builds
-        ☐ Binary serializeable base class
+    ✔ Implement generic serialization system @done(22-06-29 18:44)
+        ✔ JSON serializable base class @done(22-06-29 17:41)
+            ✔ JSON implementions should be stubbed out in non-editor builds @done(22-06-29 17:41)
+        ✔ Binary serializable base class @done(22-06-29 18:44)
     ✔ Wrap NFD in an API in the platform module @low @done(22-05-31 15:44)
         Wrapper added to utils - not platform
     ✔ Add custom (64 bit?) UUID generator (based on Chreno's UUIDs) @done(22-06-27 13:34)
@@ -76,6 +76,9 @@ Core:
         Enitity:
             ✔ Single UUID @done(22-06-01 14:01)
             ✔ Functionality for adding/working with components (through EnTT) @done(22-06-01 14:01)
+            ☐ Serialize
+                ☐ JSON
+                ☐ Binary
 
         Components:
             ✔ Tag @done(22-06-23 15:49)
@@ -90,6 +93,9 @@ Core:
     
     World (Lunariums version of a "Scene"):
         ☐ Implement the world without Regions first
+        ☐ Serialize world
+            ☐ JSON
+            ☐ Binary
 
         Implement Regions:
             ☐ Track/manage active regions
@@ -145,7 +151,7 @@ Utils:
 Assets:
     ✔ Internal Asset Manager @high @done (1/25/2022, 3:58:20 PM)
         ☐ Document Index.Dat and the AssetIndex class
-    ☐ Move the GenerateFont method from internal_font.h into data_manager.h
+    ✔ Move the GenerateFont method from internal_font.h into data_manager.h @done(22-06-29 17:42)
 
     Types:
         - Classes that represent each resource Types
@@ -158,7 +164,7 @@ Assets:
     Loaders:
         - Need class (or classes?) to load resources from the packed format that the pipeline generates
         Come up with binary file formats for each type:
-            ☐ .xml (This will probably be multiple different formats depending on what the .xml file is describing)
+            ☐ .json (This will probably be multiple different formats depending on what the .json file is describing)
             ☐ Image
             ☐ Script
             ☐ Audio

docs/tasks/editor.todo

@@ -42,6 +42,7 @@ Editor:
         World View:
 
         World Hierarchy (Tree View):
+            ☐ Handle showing Enities with children @high
 
         Asset Viewer:
             ✔ Get references to the EditorAsset objects instead of the raw file locations @done(22-06-01 18:48)

src/assets/serializing/binary_serializable.h

@@ -0,0 +1,26 @@
+/******************************************************************************
+*	File		-	binary_serializable.h
+*	Author		-	Joey Pollack
+*	Date		-	2022/06/29 (y/m/d)
+*	Mod Date	-	2022/06/29 (y/m/d)
+*	Description	-	base class for any object that can be serialized to binary
+******************************************************************************/
+
+#ifndef LUNARIUM_BINARY_SERIALIZABLE_H_
+#define LUNARIUM_BINARY_SERIALIZABLE_H_
+
+#include <utils/op_res.h>
+
+namespace lunarium
+{
+    class BinaryFileBuffer;
+
+    class BinarySerializable
+    {
+    public:
+        [[nodiscard]] OpRes Serialize(BinaryFileBuffer* pBuffer);
+        [[nodiscard]] OpRes Deserialize(BinaryFileBuffer* pBuffer);
+    };
+}
+
+#endif  // LUNARIUM_BINARY_SERIALIZABLE_H_

src/assets/serializing/json_serializable.h

@@ -0,0 +1,28 @@
+/******************************************************************************
+*	File		-	json_serializable.h
+*	Author		-	Joey Pollack
+*	Date		-	2022/06/29 (y/m/d)
+*	Mod Date	-	2022/06/29 (y/m/d)
+*	Description	-	Base class for any json serializable object
+******************************************************************************/
+
+#ifndef LUNARIUM_JSON_SERIALIZABLE_H_
+#define LUNARIUM_JSON_SERIALIZABLE_H_
+
+#include <utils/op_res.h>
+#include <nlohmann/json.hpp>
+
+namespace lunarium
+{
+    class JSONSerializable
+    {
+    public:
+        [[nodiscard]] virtual OpRes Serialize(nlohmann::json& node) = 0;
+        [[nodiscard]] virtual OpRes Deserialize(nlohmann::json& node) = 0;
+        [[nodiscard]] virtual nlohmann::json AsJSON() = 0;
+        [[nodiscord]] virtual bool IsValidNode(nlohmann::json& node) = 0;
+
+    };
+}
+
+#endif  // LUNARIUM_JSON_SERIALIZABLE_H_

src/run_modes/editor/contents/World.cpp

@@ -7,6 +7,7 @@
 ******************************************************************************/
 
 #include "world.h"
+#include <LunariumConfig.h>
 
 #include <world/world.h>
 
@@ -33,18 +34,24 @@ namespace lunarium { namespace editor
         return OpRes::OK();
     }
 
-    OpRes World::LoadFromJSON(nlohmann::json& node)
+    OpRes World::Deserialize(nlohmann::json& node)
     {
         // TODO: Implement World::LoadFromJSON
         // Create the lunarium::World Object here
         // Replace the one created in the constructor
+        #if !BUILD_NO_EDITOR // Only does this when this is an editor build
+
+        #endif
         return OpRes::OK();
     }
 
-    OpRes World::SaveToJSON(nlohmann::json& node)
+    OpRes World::Serialize(nlohmann::json& node)
     {
         // TODO: Implement World::SaveToJSON
         // Store the entities UUID - the Entity class will serialize itself
+        #if !BUILD_NO_EDITOR // Only does this when this is an editor build
+
+        #endif
         return OpRes::OK();
     }
 
@@ -54,4 +61,15 @@ namespace lunarium { namespace editor
         return true;
     }
 
+    nlohmann::json World::AsJSON()
+    {
+        #if !BUILD_NO_EDITOR // Only does this when this is an editor build
+        nlohmann::json node;
+
+        return node;
+        #endif
+
+        return nlohmann::json();
+    }
+
 }}

src/run_modes/editor/contents/content_manager.cpp

@@ -133,7 +133,7 @@ namespace lunarium { namespace editor
             pAsset->mLocation = std::filesystem::path(asset["Location"].get<std::string>());
 
             // Load type specific data
-            if (Failed(pAsset->LoadFromJSON(asset).LogIfFailed(Editor::LogCat).LogIfFailed(Editor::LogCat)))
+            if (Failed(pAsset->Deserialize(asset).LogIfFailed(Editor::LogCat).LogIfFailed(Editor::LogCat)))
             {
                 return OpRes::Fail("Could not load asset type specific data for asset with ID: %llu, File: %s", 
                                     pAsset->GetID(), pAsset->GetFileLocation().filename().string().c_str());
@@ -184,7 +184,7 @@ namespace lunarium { namespace editor
             // TODO: This needs to be a relative path! (Relative to the project root)
             asset["Location"] = pAsset->GetFileLocation().string().c_str();
 
-            if (Failed(pAsset->SaveToJSON(asset).LogIfFailed(Editor::LogCat).LogIfFailed(Editor::LogCat)))
+            if (Failed(pAsset->Serialize(asset).LogIfFailed(Editor::LogCat).LogIfFailed(Editor::LogCat)))
             {
                 return OpRes::Fail("Could not save asset meta data for file: %s", pAsset->GetFileLocation().string().c_str());
             }

src/run_modes/editor/contents/editor_asset.h

@@ -11,14 +11,15 @@
 
 #include "definitions.h"
 #include "content_manager.h"
+#include <utils/op_res.h>
+#include <assets/serializing/json_serializable.h>
 #include <filesystem>
 #include <string>
-#include <utils/op_res.h>
 
 namespace lunarium { namespace editor 
 {
 
-    class EditorAsset
+    class EditorAsset : public JSONSerializable
     {
     public:
         EditorAsset(AssetType type);
@@ -29,8 +30,10 @@ namespace lunarium { namespace editor
         bool GetIsTrashed() const;
 
         [[nodiscard]] virtual OpRes LoadRawFile() = 0;
-        [[nodiscard]] virtual OpRes LoadFromJSON(nlohmann::json& node) = 0;
-        [[nodiscard]] virtual OpRes SaveToJSON(nlohmann::json& node) = 0;
+
+
+       // [[nodiscard]] virtual OpRes LoadFromJSON(nlohmann::json& node) = 0;
+        //[[nodiscard]] virtual OpRes SaveToJSON(nlohmann::json& node) = 0;
 
     private:
         friend class ContentManager;
@@ -43,7 +46,7 @@ namespace lunarium { namespace editor
 
     protected:
         std::filesystem::path mAssetDir;
-        [[nodiscord]] virtual bool IsValidNode(nlohmann::json& node) = 0;
+      //  [[nodiscord]] virtual bool IsValidNode(nlohmann::json& node) = 0;
 
     private: // DISABLE COPY
         EditorAsset(const EditorAsset&) = delete;

src/run_modes/editor/contents/tile_set.cpp

@@ -37,8 +37,10 @@ namespace lunarium { namespace editor
         return OpRes::OK();
     }
     
-    OpRes TileSet::LoadFromJSON(nlohmann::json& node)
-    {
+    OpRes TileSet::Deserialize(nlohmann::json& node)
+    {       
+        #if !BUILD_NO_EDITOR // Only does this when this is an editor build
+
         // Load Image
         mSetImage = FileLoaders::LoadImage(mAssetDir / GetFileLocation());
         if (!mSetImage)
@@ -57,20 +59,40 @@ namespace lunarium { namespace editor
         mNumTiles.Width     = node["NumTilesCol"].get<int>();
         mNumTiles.Height    = node["NumTilesRow"].get<int>();
 
+        #endif
         return OpRes::OK();
     }
 
-    OpRes TileSet::SaveToJSON(nlohmann::json& node)
+    OpRes TileSet::Serialize(nlohmann::json& node)
     {
+        #if !BUILD_NO_EDITOR // Only does this when this is an editor build
+
         node["TileSetID"]      = mTileSetID;
         node["TileSizeWidth"]  = mTileSize.Width;
         node["TileSizeHeight"] = mTileSize.Height;
         node["NumTilesCol"]    = mNumTiles.Width;
         node["NumTilesRow"]    = mNumTiles.Height;
 
+        #endif
         return OpRes::OK();
     }
 
+    nlohmann::json TileSet::AsJSON()
+    {
+        nlohmann::json node;
+        
+        #if !BUILD_NO_EDITOR // Only does this when this is an editor build
+
+        node["TileSetID"]      = mTileSetID;
+        node["TileSizeWidth"]  = mTileSize.Width;
+        node["TileSizeHeight"] = mTileSize.Height;
+        node["NumTilesCol"]    = mNumTiles.Width;
+        node["NumTilesRow"]    = mNumTiles.Height;
+
+        #endif
+        return node;
+    }
+
     bool TileSet::IsValidNode(nlohmann::json& node)
     {
         if (node["TileSetID"].is_null()) { return false; }

src/run_modes/editor/contents/tile_set.h

@@ -24,8 +24,10 @@ namespace lunarium { namespace editor
 
         // Load the raw asset file from the internal location
         OpRes LoadRawFile();
-        OpRes LoadFromJSON(nlohmann::json& node);
-        OpRes SaveToJSON(nlohmann::json& node);
+        OpRes Serialize(nlohmann::json& node);
+        OpRes Deserialize(nlohmann::json& node);
+        bool IsValidNode(nlohmann::json& node);
+        nlohmann::json AsJSON();
 
         void SetTileSetID(int id);
         int GetTileSetID() const;
@@ -47,7 +49,6 @@ namespace lunarium { namespace editor
 
 
     private:
-        [[nodiscord]] virtual bool IsValidNode(nlohmann::json& node);
 
     };
 }}

src/run_modes/editor/contents/world.h

@@ -28,8 +28,10 @@ namespace lunarium { namespace editor
         ~World();
 
         [[nodiscard]] virtual OpRes LoadRawFile();
-        [[nodiscard]] virtual OpRes LoadFromJSON(nlohmann::json& node);
-        [[nodiscard]] virtual OpRes SaveToJSON(nlohmann::json& node);
+        [[nodiscard]] virtual OpRes Serialize(nlohmann::json& node);
+        [[nodiscard]] virtual OpRes Deserialize(nlohmann::json& node);
+        [[nodiscord]] virtual bool IsValidNode(nlohmann::json& node);
+        [[nodiscard]] virtual nlohmann::json AsJSON();
 
         lunarium::World* GetWorld();
 
@@ -38,7 +40,6 @@ namespace lunarium { namespace editor
 
     private:
         
-        [[nodiscord]] virtual bool IsValidNode(nlohmann::json& node);
 
 
     private: // DISABLED

src/utils/binary_file_buffer.cpp

@@ -15,7 +15,7 @@
 namespace lunarium
 {
 	BinaryFileBuffer::BinaryFileBuffer()
-		:	mbIsLoaded(false), mpData(nullptr), mFileSize(0), mReadPos(0), mFileName("")
+		:	mbIsLoaded(false), mpBuffer(nullptr), mFileSize(0), mBufferPos(0), mFileName("")
 	{
 	}
 
@@ -24,6 +24,43 @@ namespace lunarium
 		Unload();
 	}
 
+	bool BinaryFileBuffer::NewFile(int reserve_size)
+	{
+		if (mbIsLoaded)
+		{
+			Unload();
+		}
+
+		mpBuffer = new unsigned char[reserve_size];
+		mFileSize = reserve_size;
+		mbIsLoaded = true;
+
+		return true;
+	}
+
+	bool BinaryFileBuffer::WriteFile(const char* filename, bool include_extra_bytes)
+	{
+		std::ofstream ofs(filename, std::ios_base::binary | std::ios_base::trunc);
+		if (!ofs.is_open())
+		{
+			return false;
+		}
+
+		// Only writing up to the buffer pos because the rest will be garbage data
+		int write_size = mBufferPos;
+		if (include_extra_bytes)
+		{
+			// Unless the user says otherwise
+			write_size = mFileSize;
+		}
+
+		ofs.write((const char*)mpBuffer, write_size);
+		ofs.close();
+		ofs.clear();
+		mFileName = filename;
+		return true;
+	}
+
 	bool BinaryFileBuffer::LoadFile(const char * filename)
 	{
 		if (mbIsLoaded)
@@ -43,9 +80,9 @@ namespace lunarium
 		ifs.seekg(0, std::ios_base::beg);
 		
 		mFileSize = end - start;
-		mpData = new unsigned char[mFileSize];
+		mpBuffer = new unsigned char[mFileSize];
 
-		ifs.read((char*)mpData, mFileSize);
+		ifs.read((char*)mpBuffer, mFileSize);
 
 		ifs.close();
 		ifs.clear();
@@ -60,12 +97,12 @@ namespace lunarium
 		if (!mbIsLoaded)
 			return;
 
-		delete[] mpData;
-		mpData = nullptr;
+		delete[] mpBuffer;
+		mpBuffer = nullptr;
 
 		mFileSize = 0;
 		mFileName = "";
-		mReadPos = 0;
+		mBufferPos = 0;
 		mbIsLoaded = false;
 	}
 
@@ -86,29 +123,130 @@ namespace lunarium
 	
 	const unsigned char* BinaryFileBuffer::GetBuffer() const
 	{
-		return mpData;
+		return mpBuffer;
 	}
 
+	/////////////////////////////////////////////////////////////////////
+	//				READ METHODS
+	/////////////////////////////////////////////////////////////////////
 	bool BinaryFileBuffer::Read(char * buffer, int numBytes)
 	{
-		if (!mbIsLoaded || mReadPos >= mFileSize)
+		if (!mbIsLoaded || mBufferPos >= mFileSize)
+			return false;
+
+		memcpy(buffer, &mpBuffer[mBufferPos], numBytes);
+		mBufferPos += numBytes;
+
+		return true;
+	}
+
+	int BinaryFileBuffer::ReadInt()
+	{
+		int value = 0;
+		Read((char*)&value, sizeof(int));
+		return value;
+	}
+
+	short BinaryFileBuffer::ReadShort()
+	{
+		short value = 0;
+		Read((char*)&value, sizeof(short));
+		return value;		
+	}
+
+	char BinaryFileBuffer::ReadByte()
+	{
+		char value = 0;
+		Read((char*)&value, sizeof(char));
+		return value;		
+	}
+
+	unsigned int BinaryFileBuffer::ReadUInt()
+	{
+		unsigned int value = 0;
+		Read((char*)&value, sizeof(unsigned int));
+		return value;		
+	}
+
+	unsigned short BinaryFileBuffer::ReadUShort()
+	{
+		unsigned short value = 0;
+		Read((char*)&value, sizeof(unsigned short));
+		return value;		
+	}
+
+	unsigned char BinaryFileBuffer::ReadUByte()
+	{
+		unsigned char value = 0;
+		Read((char*)&value, sizeof(unsigned char));
+		return value;		
+	}
+
+	/////////////////////////////////////////////////////////////////////
+	//				WRITE METHODS
+	/////////////////////////////////////////////////////////////////////
+	bool BinaryFileBuffer::Write(char* buffer, int num_bytes)
+	{
+		if (!mbIsLoaded)
+		{
 			return false;
+		}
 
-		memcpy(buffer, &mpData[mReadPos], numBytes);
-		mReadPos += numBytes;
+		if (mBufferPos + num_bytes >= mFileSize)
+		{
+			// Reserve more space
+			int new_size = mFileSize * 2 + num_bytes;	// adding num_bytes to make sure the write will fit
+			unsigned char* new_buffer = new unsigned char[new_size];
+			memcpy(new_buffer, mpBuffer, mFileSize);
+			delete[] mpBuffer;
+			mpBuffer = new_buffer;
+			mFileSize = new_size;
+		}
 
+		memcpy(&mpBuffer[mBufferPos], buffer, num_bytes);
+		mBufferPos += num_bytes;
 		return true;
 	}
 
+	void BinaryFileBuffer::WriteInt(int value)
+	{
+		Write((char*)&value, sizeof(int));
+	}
+
+	void BinaryFileBuffer::WriteShort(short value)
+	{
+		Write((char*)&value, sizeof(short));		
+	}
+
+	void BinaryFileBuffer::WriteByte(char value)
+	{
+		Write((char*)&value, sizeof(char));		
+	}
+
+	void BinaryFileBuffer::WriteUInt(unsigned int value)
+	{
+		Write((char*)&value, sizeof(unsigned int));	
+	}
+
+	void BinaryFileBuffer::WriteUShort(unsigned short value)
+	{
+		Write((char*)&value, sizeof(unsigned short));			
+	}
+
+	void BinaryFileBuffer::WriteUByte(unsigned char value)
+	{
+		Write((char*)&value, sizeof(unsigned char));	
+	}
+
 	void BinaryFileBuffer::SeekTo(int pos)
 	{
-		mReadPos = pos;
+		mBufferPos = pos;
 
-		if (mReadPos < 0)
-			mReadPos = 0;
+		if (mBufferPos < 0)
+			mBufferPos = 0;
 
-		if (mReadPos >= mFileSize)
-			mReadPos = mFileSize - 1;
+		if (mBufferPos >= mFileSize)
+			mBufferPos = mFileSize - 1;
 	}
 
 }

src/utils/binary_file_buffer.h

@@ -21,6 +21,10 @@ namespace lunarium
 		BinaryFileBuffer();
 		~BinaryFileBuffer();
 
+		/// Create a new file buffer of the given starting size
+		/// This will clear out any existing buffer
+		bool NewFile(int reserve_size);
+		bool WriteFile(const char* filename, bool include_extra_bytes = false);
 		bool LoadFile(const char* filename);
 		void Unload();
 		bool IsLoaded() const;
@@ -29,6 +33,21 @@ namespace lunarium
 		const unsigned char* GetBuffer() const;
 
 		bool Read(char* buffer, int numBytes);
+		int ReadInt();
+		short ReadShort();
+		char ReadByte();
+		unsigned int ReadUInt();
+		unsigned short ReadUShort();
+		unsigned char ReadUByte();
+
+		bool Write(char* buffer, int num_bytes);
+		void WriteInt(int value);
+		void WriteShort(short value);
+		void WriteByte(char value);
+		void WriteUInt(unsigned int value);
+		void WriteUShort(unsigned short value);
+		void WriteUByte(unsigned char value);
+
 		void SeekTo(int pos);
 
 	private:
@@ -36,8 +55,8 @@ namespace lunarium
 		bool mbIsLoaded;
 		std::string mFileName;
 		int mFileSize;
-		unsigned char* mpData;
-		int mReadPos;
+		unsigned char* mpBuffer;
+		int mBufferPos;
 
 	};
 }

src/world/entity.h

@@ -13,13 +13,10 @@
 #include <utils/logger.h>
 #include <entt/entt.hpp>
 #include <world/world.h>
+#include <assets/serializing/json_serializable.h>
 
-namespace nlohmann
-{
-    class json;
-}
 
-namespace lunarium
+namespace lunarium // TODO: : public JSONSerializable
 {
     class Entity
     {