# HG changeset patch
# User František Kučera <franta-hg@frantovo.cz>
# Date 1566228062 -7200
# Node ID 148f8dd077e85825aa04dc6599b927e2c9c336fc
# Parent  975f38eb1e123897c36e7e91b9fec2d4bad497c3
CLI options and parser of configuration parameters instead of hardcoded values

diff -r 975f38eb1e12 -r 148f8dd077e8 src/CLI.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/CLI.h	Mon Aug 19 17:21:02 2019 +0200
@@ -0,0 +1,80 @@
+/**
+ * cadMousePro
+ * Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <locale.h>
+#include <string>
+#include <vector>
+#include <sstream>
+#include <locale>
+#include <codecvt>
+#include <iostream>
+
+/**
+ * a common header-only library for CLI programs
+ */
+class CLI {
+public:
+
+	CLI(int argc, char* argv[]) {
+		setlocale(LC_ALL, "");
+
+		this->argc = &argc;
+		this->argv = &argv;
+
+		program = convertor.from_bytes(argv[0]);
+
+		for (int i = 1; i < argc; i++) {
+			args.insert(args.end(), convertor.from_bytes(argv[i]));
+		}
+
+	}
+
+	CLI(const CLI& orig) {
+	}
+
+	virtual ~CLI() {
+	}
+
+	const std::wstring programName() {
+		return (const std::wstring) program;
+	}
+
+	const std::vector<std::wstring> arguments() {
+		return (const std::vector<std::wstring>)args;
+	}
+
+	static const int EXIT_CODE_SUCCESS = 0;
+	static const int EXIT_CODE_UNEXPECTED_ERROR = 1;
+	static const int EXIT_CODE_BAD_CLI_ARGUMENTS = 6;
+
+	/**
+	 * std::cin and std::cout are "tied" by default i.e. reading from std::cin causes flush of the std::cout.
+	 * Call this to "untie" them and have less write() calls (better buffering).
+	 */
+	static void untieStdIO() {
+		std::cin.tie(nullptr);
+	}
+
+private:
+	int* argc;
+	char*** argv;
+	std::wstring program;
+	std::vector<std::wstring> args;
+	std::wstring_convert<std::codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.
+};
diff -r 975f38eb1e12 -r 148f8dd077e8 src/CLIConfiguration.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/CLIConfiguration.h	Mon Aug 19 17:21:02 2019 +0200
@@ -0,0 +1,30 @@
+/**
+ * cadMousePro
+ * Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include "CadMouseConfig.h"
+
+class CLIConfiguration {
+public:
+
+
+	CadMouseConfig cadMouseConfig;
+
+	virtual ~CLIConfiguration() {
+	}
+};
diff -r 975f38eb1e12 -r 148f8dd077e8 src/CLIException.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/CLIException.h	Mon Aug 19 17:21:02 2019 +0200
@@ -0,0 +1,41 @@
+/**
+ * cadMousePro
+ * Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <string>
+
+#include "CLI.h"
+
+class CLIException {
+private:
+	std::wstring message;
+	int exitCode = CLI::EXIT_CODE_UNEXPECTED_ERROR;
+public:
+
+	CLIException(std::wstring message, int exitCode) : message(message), exitCode(exitCode) {
+	}
+	
+	std::wstring getMessge() const {
+		return message;
+	}
+
+	int getExitCode() const {
+		return exitCode;
+	}
+
+};
diff -r 975f38eb1e12 -r 148f8dd077e8 src/CLIParser.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/CLIParser.h	Mon Aug 19 17:21:02 2019 +0200
@@ -0,0 +1,80 @@
+/**
+ * cadMousePro
+ * Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include <vector>
+
+#include "CLI.h"
+#include "CLIConfiguration.h"
+#include "CLIException.h"
+
+class CLIParser {
+private:
+
+	std::wstring readNext(std::vector<std::wstring> arguments, int& i) {
+		if (i < arguments.size()) return arguments[i++];
+		else throw CLIException(L"Missing CLI argument" + (i > 0 ? (L" after " + arguments[i - 1]) : L""), CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);
+	}
+
+	bool parseBoolean(std::wstring value) {
+		if (value == L"true") return true;
+		else if (value == L"false") return false;
+		else throw CLIException(L"Unable to parse boolean value „" + value + L"“ – expecting „true“ or „false“", CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);
+	}
+
+	Frequency parseFrequency(std::wstring value) {
+		if (value == L"125") return Frequency::Hz_0125;
+		else if (value == L"250") return Frequency::Hz_0250;
+		else if (value == L"500") return Frequency::Hz_0500;
+		else if (value == L"1000") return Frequency::Hz_1000;
+		else throw CLIException(L"Unable to parse frequency value „" + value + L"“ – expecting „125“ or „250“ or „500“ or „1000“", CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);
+	}
+
+public:
+
+	static const std::wstring OPTION_FREQUENCY;
+	static const std::wstring OPTION_SMART_SCROLLING;
+	static const std::wstring OPTION_LIFT_OFF_DETECTION;
+	static const std::wstring OPTION_KEEP_FILE;
+
+	CLIConfiguration parse(const std::vector<std::wstring>& arguments) {
+		CLIConfiguration c;
+
+		for (int i = 0; i < arguments.size();) {
+			std::wstring option = readNext(arguments, i);
+
+			if (option == OPTION_FREQUENCY) {
+				c.cadMouseConfig.setFrequency(parseFrequency(readNext(arguments, i)));
+			} else if (option == OPTION_SMART_SCROLLING) {
+				c.cadMouseConfig.setSmartScrolling(parseBoolean(readNext(arguments, i)));
+			} else if (option == OPTION_LIFT_OFF_DETECTION) {
+				c.cadMouseConfig.setLiftOffDetection(parseBoolean(readNext(arguments, i)));
+			} else throw CLIException(L"Unsupported CLI option: " + option, CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);
+		}
+
+		return c;
+	}
+
+	virtual ~CLIParser() {
+	}
+};
+
+
+const std::wstring CLIParser::OPTION_FREQUENCY = L"--frequency";
+const std::wstring CLIParser::OPTION_SMART_SCROLLING = L"--smart-scrolling";
+const std::wstring CLIParser::OPTION_LIFT_OFF_DETECTION = L"--lift-off-detection";
diff -r 975f38eb1e12 -r 148f8dd077e8 src/cadMousePro.cpp
--- a/src/cadMousePro.cpp	Mon Aug 19 15:30:01 2019 +0200
+++ b/src/cadMousePro.cpp	Mon Aug 19 17:21:02 2019 +0200
@@ -18,10 +18,13 @@
 #include <iostream>
 
 #include "CadMouseConfig.h"
+#include "CLI.h"
+#include "CLIParser.h"
 #include "HID.h"
 
 int main(int argc, char** argv) {
 	try {
+		CLI cli(argc, argv);
 
 		std::wcout << L"cadMousePro" << std::endl;
 		HIDDevice mouse(0x256f, 0xc652, nullptr);
@@ -30,13 +33,18 @@
 		std::wcout << L"product:       " << mouse.getProductName() << std::endl;
 		// std::wcout << L"serial number: " << mouse.getSerialNumber() << std::endl; // throws exception
 
-		CadMouseConfig config;
+		CLIParser cliParser;
+		CLIConfiguration configuration = cliParser.parse(cli.arguments());
 
-		mouse.sendFeatureReport(config.serialize());
+		mouse.sendFeatureReport(configuration.cadMouseConfig.serialize());
 
-		return 0;
+		return CLI::EXIT_CODE_SUCCESS;
 	} catch (const HIDException& e) {
 		std::wcout << L"HIDException: " << e.getMessage() << std::endl;
-		return 1;
+		return CLI::EXIT_CODE_UNEXPECTED_ERROR;
+	} catch (const CLIException& e) {
+		std::wcout << L"CLIException: " << e.getMessge() << std::endl;
+		return e.getExitCode();
 	}
+
 }