feat(master): add cached conversion mode file

Redcraft.FocusIME/Source/Private/Main.cpp

@@ -21,7 +21,11 @@
 // ReSharper disable CppDeprecatedEntity
 // ReSharper disable CppClangTidyCertErr33C
 
-std::ofstream GLogFile;
+const std::string LogFilename = "FocusIME.log";
+
+const std::string CachedModeFilename = "FocusIME.json";
+
+std::ofstream GLogStream;
 
 bool GShouldExit = false;
 
@@ -48,7 +52,153 @@ void Tick()
 		Chinese,
 	};
 
-	static std::map<std::string, EIMEConversionMode> CachedIMEMode;
+	static std::map<std::string, EIMEConversionMode> CachedIMEMode = []
+	{
+		std::map<std::string, EIMEConversionMode> Result;
+
+		std::ifstream File(CachedModeFilename);
+
+		if (!File.is_open())
+		{
+			PrintLog("Cached conversion mode configuration file not found");
+
+			return Result;
+		}
+
+		do
+		{
+			std::string Buffer;
+
+			Buffer.assign(std::istreambuf_iterator<char>(File), std::istreambuf_iterator<char>());
+
+			std::string_view View = Buffer;
+
+			// { "ItemA": "ValueA", "ItemB": "ValueB" }
+
+			while (!View.empty() && std::isspace(View.front())) View.remove_prefix(1);
+			while (!View.empty() && std::isspace(View.back ())) View.remove_suffix(1);
+
+			if (!View.starts_with('{') || !View.ends_with('}')) break;
+
+			View.remove_prefix(1);
+			View.remove_suffix(1);
+
+			// "ItemA": "ValueA", "ItemB": "ValueB"
+
+			const bool bSuccessful = [&Result, &View]
+			{
+				std::string_view::size_type Index = std::string_view::npos;
+
+				while (true)
+				{
+					while (!View.empty() && std::isspace(View.front())) View.remove_prefix(1);
+
+					if (!View.starts_with('"')) return false;
+
+					View.remove_prefix(1);
+
+					// ItemA": "ValueA", "ItemB": "ValueB"
+
+					Index = View.find('"');
+
+					if (Index == std::string_view::npos) return false;
+
+					std::string_view Process = View.substr(0, Index);
+
+					View.remove_prefix(Process.size() + 1);
+
+					// : "ValueA", "ItemB": "ValueB"
+
+					while (!View.empty() && std::isspace(View.front())) View.remove_prefix(1);
+
+					if (!View.starts_with(':')) return false;
+
+					View.remove_prefix(1);
+
+					// "ValueA", "ItemB": "ValueB"
+
+					while (!View.empty() && std::isspace(View.front())) View.remove_prefix(1);
+
+					if (!View.starts_with('"')) return false;
+
+					View.remove_prefix(1);
+
+					// ValueA", "ItemB": "ValueB"
+
+					Index = View.find('"');
+
+					if (Index == std::string_view::npos) return false;
+
+					std::string_view Mode = View.substr(0, Index);
+
+					View.remove_prefix(Mode.size() + 1);
+
+					// , "ItemB": "ValueB"
+
+					while (!View.empty() && std::isspace(View.front())) View.remove_prefix(1);
+
+					if (View.empty()) return true;
+
+					if (!View.starts_with(',')) return false;
+
+					View.remove_prefix(1);
+
+					if (Mode != "English" && Mode != "Chinese" && Mode != "Default") return false;
+
+					Result[std::string(Process)] =
+						Mode == "English" ? EIMEConversionMode::English :
+						Mode == "Chinese" ? EIMEConversionMode::Chinese : EIMEConversionMode::Default;
+
+				}
+
+				return true;
+
+			} ();
+
+			if (!bSuccessful) break;
+
+			PrintLog("Successfully loaded " + std::to_string(Result.size()) + " cached conversion mode items");
+
+			return Result;
+		}
+		while (false);
+
+		PrintLog("Invalid format detected in cached conversion mode configuration file");
+
+		return Result;
+
+	} ();
+
+	auto SaveCachedIMEMode = []
+	{
+		std::ofstream File(CachedModeFilename);
+
+		if (!File.is_open())
+		{
+			PrintLog("Error: Failed to save cached conversion mode configuration");
+
+			return;
+		}
+
+		File << "{";
+
+		bool bFirstItem = true;
+
+		for (const auto& [Name, Mode] : CachedIMEMode)
+		{
+			if (!bFirstItem) File << ",";
+
+			File << "\n\t\"" << Name << "\": \"" <<
+				(Mode == EIMEConversionMode::English ? "English" :
+				 Mode == EIMEConversionMode::Chinese ? "Chinese" : "Default") << "\"";
+
+			bFirstItem = false;
+		}
+
+		File << "\n}\n";
+
+		File.close();
+	};
 
 	static HWND LastWindow = nullptr;
 
@@ -83,9 +233,11 @@ void Tick()
 				{
 					CachedIMEMode[CachedProcess] = CurrentMode;
 
-					PrintLog("Update the conversion mode cached for process '" + CachedProcess + "' to " +
+					PrintLog("Updated cached conversion mode for process '" + CachedProcess + "' to " +
 						(CurrentMode == EIMEConversionMode::English ? "English" :
-						 CurrentMode == EIMEConversionMode::Chinese ? "Chinese" : "Default"));
+					 	 CurrentMode == EIMEConversionMode::Chinese ? "Chinese" : "Default"));
+
+					SaveCachedIMEMode();
 				}
 			}
 		}
@@ -145,11 +297,11 @@ void Tick()
 			{
 				if (SendMessage(IMEWindow, WM_IME_CONTROL, IMC_SETCONVERSIONMODE, TargetMode) == 0)
 				{
-					PrintLog("Successfully set conversion mode for process '" + CachedProcess + "'");
+					PrintLog("Successfully applied conversion mode for process '" + CachedProcess + "'");
 				}
 				else
 				{
-					PrintLog("Failed to set conversion mode for process '" + CachedProcess + "'");
+					PrintLog("Error: Failed to apply conversion mode for process '" + CachedProcess + "'");
 				}
 			}
 		}
@@ -265,9 +417,9 @@ int WINAPI WinMain(HINSTANCE Instance, HINSTANCE, LPSTR, int)
 	}
 #	endif
 
-	GLogFile.open("Log.txt", std::ios::out | std::ios::app);
+	GLogStream.open(LogFilename, std::ios::out | std::ios::app);
 
-	if (!GLogFile.is_open())
+	if (!GLogStream.is_open())
 	{
 		MessageBox(nullptr, "Failed to open log file.", "FocusIME", MB_OK | MB_ICONERROR);
 
@@ -276,7 +428,7 @@ int WINAPI WinMain(HINSTANCE Instance, HINSTANCE, LPSTR, int)
 		return 1;
 	}
 
-	PrintLog("FocusIME started successfully");
+	PrintLog("FocusIME application started successfully");
 
 	MSG Message = { };
 
@@ -318,9 +470,9 @@ int WINAPI WinMain(HINSTANCE Instance, HINSTANCE, LPSTR, int)
 		}
 	}
 
-	PrintLog("FocusIME is shutting down...");
+	PrintLog("FocusIME application is shutting down");
 
-	GLogFile.close();
+	GLogStream.close();
 
 #	if BUILD_DEBUG || BUILD_DEVELOPMENT
 	{
@@ -407,7 +559,7 @@ LRESULT CALLBACK MainWindowProc(const HWND Window, const UINT Message, const WPA
 
 		if (LOWORD(WParam) == ID_TRAY_EXIT)
 		{
-			PrintLog("Exit command received from tray menu");
+			PrintLog("Exit command received from system tray menu");
 
 			GShouldExit = true;
 
@@ -451,7 +603,7 @@ void PrintLog(const std::string& Text)
 	Buffer[22] = Digits[Milliseconds /  10 % 10];
 	Buffer[23] = Digits[Milliseconds /   1 % 10];
 
-	GLogFile << Buffer << Text << std::endl;
+	GLogStream << Buffer << Text << std::endl;
 
 #if BUILD_DEBUG || BUILD_DEVELOPMENT
 	{