1 /**

     2  * Relational pipes

     3  * Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, version 3 of the License.

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU General Public License

    15  * along with this program. If not, see <http://www.gnu.org/licenses/>.

    16  */

    17 #pragma once

    18 

    19 #include <vector>

    20 #include <iostream>

    21 

    22 #include <relpipe/writer/typedefs.h>

    23 #include <relpipe/cli/CLI.h>

    24 #include <relpipe/cli/RelpipeCLIException.h>

    25 

    26 #include "Configuration.h"

    27 

    28 namespace relpipe {

    29 namespace in {

    30 namespace csv {

    31 

    32 class CLIParser {

    33 private:

    34 

    35 	relpipe::writer::string_t readNext(const std::vector<relpipe::writer::string_t>& arguments, int& i) {

    36 		if (i < arguments.size()) return arguments[i++];

    37 		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);

    38 	}

    39 

    40 	/**

    41 	 * TODO: use a common method

    42 	 */

    43 	bool parseBoolean(const relpipe::writer::string_t& value) {

    44 		if (value == L"true") return true;

    45 		else if (value == L"false") return false;

    46 		else throw relpipe::cli::RelpipeCLIException(L"Unable to parse boolean value: " + value + L" (expecting true or false)", relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);

    47 	}

    48 

    49 	/**

    50 	 * TODO: use a common method

    51 	 */

    52 	relpipe::writer::TypeId parseTypeId(const relpipe::writer::string_t& value) {

    53 		using t = relpipe::writer::TypeId;

    54 		if (value == L"string") return t::STRING;

    55 		else if (value == L"integer") return t::INTEGER;

    56 		else if (value == L"boolean") return t::BOOLEAN;

    57 		else throw relpipe::cli::RelpipeCLIException(L"Unable to parse TypeId: " + value, relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);

    58 	}

    59 

    60 public:

    61 

    62 	static const relpipe::writer::string_t OPTION_RELATION;

    63 	static const relpipe::writer::string_t OPTION_ATTRIBUTE;

    64 

    65 	Configuration parse(const std::vector<relpipe::writer::string_t>& arguments) {

    66 		Configuration c;

    67 

    68 		for (int i = 0; i < arguments.size();) {

    69 			relpipe::writer::string_t option = readNext(arguments, i);

    70 

    71 			if (option == OPTION_RELATION) {

    72 				c.relation = readNext(arguments, i);

    73 			} else if (option == OPTION_ATTRIBUTE) {

    74 				AttributeRecipe attribute;

    75 				attribute.name = readNext(arguments, i);

    76 				attribute.type = parseTypeId(readNext(arguments, i));

    77 				c.attributes.push_back(attribute);

    78 			} else throw relpipe::cli::RelpipeCLIException(L"Unsupported CLI option: " + option, relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);

    79 		}

    80 

    81 		return c;

    82 	}

    83 

    84 	virtual ~CLIParser() {

    85 	}

    86 };

    87 

    88 const relpipe::writer::string_t CLIParser::OPTION_RELATION = L"--relation";

    89 const relpipe::writer::string_t CLIParser::OPTION_ATTRIBUTE = L"--attribute";

    90 

    91 }

    92 }

    93 }