src/CLIParser.h
author František Kučera <franta-hg@frantovo.cz>
Sun, 05 Jun 2022 22:51:45 +0200
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parse connection string, credentials, check return values
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/**
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 * Relational pipes
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 * Copyright © 2022 František Kučera (Frantovo.cz, GlobalCode.info)
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 *
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 * This program is free software: you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation, version 3 of the License.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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 */
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#pragma once
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#include <vector>
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#include <iostream>
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#include <relpipe/common/type/typedefs.h>
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#include <relpipe/cli/CLI.h>
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#include <relpipe/cli/RelpipeCLIException.h>
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#include "Configuration.h"
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namespace relpipe {
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namespace in {
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namespace mqtt {
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class CLIParser {
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private:
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	relpipe::common::type::StringX readNext(const std::vector<relpipe::common::type::StringX>& arguments, int& i) {
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		if (i < arguments.size()) return arguments[i++];
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		else throw relpipe::cli::RelpipeCLIException(L"Missing CLI argument" + (i > 0 ? (L" after " + arguments[i - 1]) : L""), relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);
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	}
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public:
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	static const relpipe::common::type::StringX OPTION_RELATION;
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	static const relpipe::common::type::StringX OPTION_STREAM;
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	static const relpipe::common::type::StringX OPTION_CONNECTION_STRING;
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	static const relpipe::common::type::StringX OPTION_CONNECTION_OPTION;
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	static const relpipe::common::type::StringX OPTION_MESSAGE_COUNT;
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	Configuration parse(const std::vector<relpipe::common::type::StringX>& arguments) {
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		Configuration c;
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		for (int i = 0; i < arguments.size();) {
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			relpipe::common::type::StringX option = readNext(arguments, i);
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			if (option == OPTION_RELATION) {
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				c.relation = readNext(arguments, i);
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			} else if (option == OPTION_STREAM) {
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				c.stream = readNext(arguments, i);
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			} else if (option == OPTION_CONNECTION_STRING) {
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				c.connectionString = readNext(arguments, i);
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			} else if (option == OPTION_CONNECTION_OPTION) {
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				auto name = readNext(arguments, i);
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				auto value = readNext(arguments, i);
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				c.connectionOptions.push_back({name, value});
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			} else if (option == OPTION_MESSAGE_COUNT) {
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				c.messageCount = std::stoull(readNext(arguments, i));
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			} else throw relpipe::cli::RelpipeCLIException(L"Unsupported CLI option: " + option, relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);
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		}
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		return c;
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	}
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	virtual ~CLIParser() {
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	}
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};
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const relpipe::common::type::StringX CLIParser::OPTION_RELATION = L"--relation";
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const relpipe::common::type::StringX CLIParser::OPTION_STREAM = L"--stream";
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const relpipe::common::type::StringX CLIParser::OPTION_CONNECTION_STRING = L"--connection-string";
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const relpipe::common::type::StringX CLIParser::OPTION_CONNECTION_OPTION = L"--connection-option";
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const relpipe::common::type::StringX CLIParser::OPTION_MESSAGE_COUNT = L"--message-count";
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}
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}
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}