Create server request backbone and functions for talking to save file server.

CMakeLists.txt

@@ -302,6 +302,7 @@ if (EMSCRIPTEN)
 	    -sUSE_FREETYPE=1
             -sLLD_REPORT_UNDEFINED
 	    -sFETCH=1
+	    -sEXPORTED_RUNTIME_METHODS=stringToNewUTF8
 	    -std=c++20
 	    --proxy-to-worker
 	    -O2
@@ -316,6 +317,7 @@ if (EMSCRIPTEN)
             -sUSE_LIBPNG=1
 	    -sUSE_FREETYPE=1
 	    -sFETCH=1
+	    -sEXPORTED_RUNTIME_METHODS=stringToNewUTF8
 	    -std=c++20
 	    --proxy-to-worker
 	    -O2

Crawler.sln

@@ -9,6 +9,8 @@ Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|x64 = Debug|x64
 		Debug|x86 = Debug|x86
+		Emscripten|x64 = Emscripten|x64
+		Emscripten|x86 = Emscripten|x86
 		Release Desktop|x64 = Release Desktop|x64
 		Release Desktop|x86 = Release Desktop|x86
 		Release|x64 = Release|x64
@@ -19,6 +21,10 @@ Global
 		{8E3067AF-CFE7-4B11-BC6B-B867C32753D7}.Debug|x64.Build.0 = Debug|x64
 		{8E3067AF-CFE7-4B11-BC6B-B867C32753D7}.Debug|x86.ActiveCfg = Debug|Win32
 		{8E3067AF-CFE7-4B11-BC6B-B867C32753D7}.Debug|x86.Build.0 = Debug|Win32
+		{8E3067AF-CFE7-4B11-BC6B-B867C32753D7}.Emscripten|x64.ActiveCfg = Emscripten|x64
+		{8E3067AF-CFE7-4B11-BC6B-B867C32753D7}.Emscripten|x64.Build.0 = Emscripten|x64
+		{8E3067AF-CFE7-4B11-BC6B-B867C32753D7}.Emscripten|x86.ActiveCfg = Emscripten|Win32
+		{8E3067AF-CFE7-4B11-BC6B-B867C32753D7}.Emscripten|x86.Build.0 = Emscripten|Win32
 		{8E3067AF-CFE7-4B11-BC6B-B867C32753D7}.Release Desktop|x64.ActiveCfg = Release Desktop|x64
 		{8E3067AF-CFE7-4B11-BC6B-B867C32753D7}.Release Desktop|x64.Build.0 = Release Desktop|x64
 		{8E3067AF-CFE7-4B11-BC6B-B867C32753D7}.Release Desktop|x86.ActiveCfg = Release Desktop|Win32

Crawler/Crawler.cpp

@@ -239,7 +239,7 @@ bool Crawler::OnUserCreate(){
 		SetupDiscord();
 	#endif
 
-	SendRequest("http://projectdivar.com/files/index.html","");
+	SendRequest("index.html","");
 	
 	return true;
 }
@@ -2564,4 +2564,8 @@ void Crawler::ResetGame(){
 	State_OverworldMap::UpdateCurrentConnectionPoint(*State_OverworldMap::currentConnectionPoint);
 	SetChapter(1);
 	SaveFile::SetSaveFileName("");
+}
+
+void Crawler::OnRequestCompleted(const std::string_view receivedData)const{
+	std::cout<<"Received in engine: "<<receivedData<<std::endl;
 }

Crawler/Crawler.h

@@ -208,6 +208,7 @@ public:
 	void UpdateDiscordStatus(std::string levelName,std::string className);
 	void InitializePlayerLevelCap();
 	void ResetGame();
+	void OnRequestCompleted(const std::string_view receivedData)const override;
 
 	struct TileGroupData{
 		vi2d tilePos;

Crawler/Crawler.vcxproj

@@ -276,6 +276,12 @@
       <LanguageStandard>stdcpp20</LanguageStandard>
       <AdditionalIncludeDirectories>C:\Users\sigon\source\repos\Crawler\Crawler\discord-files;</AdditionalIncludeDirectories>
     </ClCompile>
+    <PostBuildEvent>
+      <Command>powershell.exe -ExecutionPolicy Bypass -NoProfile -NonInteractive -File ../emscripten_build.ps1</Command>
+    </PostBuildEvent>
+    <PreBuildEvent>
+      <Command>powershell.exe -ExecutionPolicy Bypass -NoProfile -File emscripten_build.ps1</Command>
+    </PreBuildEvent>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Emscripten|x64'">
     <Link>
@@ -286,6 +292,12 @@
       <LanguageStandard>stdcpp20</LanguageStandard>
       <AdditionalIncludeDirectories>C:\Users\sigon\source\repos\Crawler\Crawler\discord-files;</AdditionalIncludeDirectories>
     </ClCompile>
+    <PostBuildEvent>
+      <Command>powershell.exe -ExecutionPolicy Bypass -NoProfile -NonInteractive -File ../emscripten_build.ps1</Command>
+    </PostBuildEvent>
+    <PreBuildEvent>
+      <Command>powershell.exe -ExecutionPolicy Bypass -NoProfile -File emscripten_build.ps1</Command>
+    </PreBuildEvent>
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClInclude Include="Ability.h" />

Crawler/SaveFile.cpp

@@ -50,6 +50,7 @@ INCLUDE_game
 
 size_t SaveFile::saveFileID=0;
 std::string SaveFile::saveFileName="";
+std::string SaveFile::username="";
 
 const size_t SaveFile::GetSaveFileCount(){
 	size_t count=0;
@@ -194,4 +195,44 @@ const void SaveFile::UpdateSaveGameData(){
 			offsetY+=49;
 		}
 	}
+}
+
+const std::string SaveFile::CreateServerRequest(const SaveFileOperation::Operation operation,std::string_view data){
+	auto CalculateChecksum=[](std::string_view operation,std::string_view data){
+		return username.length()*8+data.length()*2+operation.length();
+	};
+	std::string dataString=std::format("?username={}",username);
+	std::string operationName="";
+	switch(operation){
+		case SaveFileOperation::GET_LOAD_FILES:{
+			operationName=std::format("GET_LOAD_FILES");
+			//Data should be blank.
+		}break;
+		case SaveFileOperation::GET_FILE:{
+			operationName=std::format("GET_FILE");
+			//Data should contain the file ID we want.
+		}break;
+		case SaveFileOperation::SAVE_FILE:{
+			operationName=std::format("SAVE_FILE");
+			//Data should contain the entire contents of our save file.
+		}break;
+	}
+	dataString+="&operation="+operationName;
+	dataString+="&checksum="+std::to_string(CalculateChecksum(operationName,data));
+	dataString+="&data="+std::string(data);
+	return "save_server"_S+dataString;
+}
+const void SaveFile::Server_GetLoadInfo(){
+	game->SendRequest(CreateServerRequest(SaveFileOperation::GET_LOAD_FILES,"0"),"");
+}
+const void SaveFile::Server_GetFile(){
+	game->SendRequest(CreateServerRequest(SaveFileOperation::GET_FILE,std::to_string(saveFileID)),"");
+}
+const void SaveFile::Server_SaveFile(){
+	std::stringstream fileContents;
+	std::ifstream file("save_file_path"_S+std::format("save.{:04}",saveFileID));
+	while(file.good()){
+		fileContents<<char(file.get());
+	}
+	game->SendRequest(CreateServerRequest(SaveFileOperation::SAVE_FILE,std::to_string(saveFileID)+"|"+fileContents.str()),"");
 }

Crawler/SaveFile.h

@@ -39,9 +39,18 @@ All rights reserved.
 
 #undef GetSaveFileName(); //Stupid Windows
 
+namespace SaveFileOperation{
+	enum Operation{
+		GET_LOAD_FILES,
+		GET_FILE,
+		SAVE_FILE,
+	};
+};
+
 class SaveFile{
 	static size_t saveFileID;
 	static std::string saveFileName;
+	static std::string username;
 public:
 	static const std::string_view GetSaveFileName();
 	static const void SetSaveFileName(std::string_view saveFileName);
@@ -51,4 +60,8 @@ public:
 	static const void SetSaveFileID(size_t saveFileID);
 	//Called whenever the save game data is updated.
 	static const void UpdateSaveGameData();
+	static const std::string CreateServerRequest(const SaveFileOperation::Operation operation,std::string_view data);
+	static const void Server_GetLoadInfo();
+	static const void Server_GetFile();
+	static const void Server_SaveFile();
 };

Crawler/Version.h

@@ -39,7 +39,7 @@ All rights reserved.
 #define VERSION_MAJOR 0
 #define VERSION_MINOR 2
 #define VERSION_PATCH 1
-#define VERSION_BUILD 5279
+#define VERSION_BUILD 5283
 
 #define stringify(a) stringify_(a)
 #define stringify_(a) #a

Crawler/assets/config/configuration.txt

@@ -14,6 +14,9 @@ Interface
     9PatchSize = 24,24
 }
 
+# Save File Server Name
+save_server = http://projectdivar.com/AiL
+
 # Map Files Loading Config
 map_config = levels.txt
 

Crawler/emscripten_build.ps1

@@ -1,2 +1,3 @@
-~\Documents\emsdk\emsdk_env.ps1 activate latest
-em++ -std=c++20 --proxy-to-worker -fexperimental-library -O2 -s ALLOW_MEMORY_GROWTH=1 -s MAX_WEBGL_VERSION=2 -s MIN_WEBGL_VERSION=2 -s USE_LIBPNG=1 -s USE_FREETYPE=1 $(Get-ChildItem *.cpp) -s FETCH=1 -o pge.html --preload-file assets
+cd ..
+./emscripten_build.ps1
+./emscripten_run.ps1

Crawler/olcPixelGameEngine.h

@@ -473,6 +473,7 @@ namespace _gfs = std::filesystem;
 #if defined(__EMSCRIPTEN__)
 #define OLC_PLATFORM_EMSCRIPTEN
 #include <emscripten/fetch.h>
+#include <emscripten/emscripten.h>
 #endif
 #endif
 #endif
@@ -996,6 +997,7 @@ namespace olc
 		virtual void OnTextEntryComplete(const std::string& sText);
 		// Called when a console command is executed
 		virtual bool OnConsoleCommand(const std::string& sCommand);
+		virtual void OnRequestCompleted(const std::string_view receivedData)const;
 
 		
 		virtual olc::rcode SendRequest(std::string_view url,std::string_view data);
@@ -1242,6 +1244,8 @@ namespace olc
 
 	public:
 
+		static std::string responseData;
+
 		// Experimental Lightweight 3D Routines ================
 #ifdef OLC_ENABLE_EXPERIMENTAL
 		// Set Manual View Matrix
@@ -2044,6 +2048,8 @@ namespace olc
 		return o;
 	};
 
+	std::string PixelGameEngine::responseData;
+
 	// O------------------------------------------------------------------------------O
 	// | olc::PixelGameEngine IMPLEMENTATION                                          |
 	// O------------------------------------------------------------------------------O
@@ -4393,6 +4399,8 @@ namespace olc
 	void PixelGameEngine::OnTextEntryComplete(const std::string& sText) { UNUSED(sText); }
 	bool PixelGameEngine::OnConsoleCommand(const std::string& sCommand) { UNUSED(sCommand); return false; }
 
+	void PixelGameEngine::OnRequestCompleted(const std::string_view receivedData)const{}
+
 	
 	olc::rcode PixelGameEngine::SendRequest(std::string_view url,std::string_view data){platform->SendRequest(url,data);return olc::rcode::OK;};
 
@@ -7206,23 +7214,10 @@ namespace olc
 		}
 
 		virtual olc::rcode SendRequest(std::string_view url,std::string_view data)override{
-			emscripten_fetch_attr_t attr;
-			emscripten_fetch_attr_init(&attr);
-			strcpy(attr.requestMethod, "GET");
-			attr.attributes=EMSCRIPTEN_FETCH_LOAD_TO_MEMORY|EMSCRIPTEN_FETCH_SYNCHRONOUS|EMSCRIPTEN_FETCH_REPLACE;
-			emscripten_fetch_t*fetch=emscripten_fetch(&attr,std::string(url).c_str()); // Blocks here until the operation is complete.
-			if(fetch->status==200){
-				printf("Finished downloading %llu bytes from URL %s.\n", fetch->numBytes, fetch->url);
-				// The data is now available at fetch->data[0] through fetch->data[fetch->numBytes-1];
-			}else{
-				printf("Downloading %s failed, HTTP failure status code: %d.\n",fetch->url,fetch->status);
-			}
-			emscripten_fetch_close(fetch);
-
-			for(int i=0;i<fetch->numBytes;i++){
-				std::cout<<fetch->data[i];
-			}
-			std::cout<<std::endl;
+			EM_ASM({
+				requestResp="";
+				fetch(UTF8ToString($0)).then((resp)=>resp.text()).then((data)=>{requestResp=data});
+			},std::string(url).c_str());
 			return olc::rcode::OK;
 		}
 
@@ -7350,6 +7345,22 @@ namespace olc
 		static void MainLoop()
 		{
 			olc::Platform::ptrPGE->olc_CoreUpdate();
+			char*ptr=(char*)EM_ASM_PTR({
+				if(requestResp!==""){
+					console.log("Request received: "+requestResp);
+					var newPtr=stringToNewUTF8(requestResp);
+					requestResp="";
+					return newPtr;
+				}
+				return 0;
+			});
+
+			if(ptr!=NULL){
+				PixelGameEngine::responseData=std::string(ptr);
+				ptrPGE->OnRequestCompleted(PixelGameEngine::responseData);
+				delete ptr;
+			}
+
 			if (!ptrPGE->olc_IsRunning())
 			{
 				if (ptrPGE->OnUserDestroy())