1 /**

     2  * Relational pipes

     3  * Copyright © 2021 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 

    21 #include <relpipe/common/type/typedefs.h>

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

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

    24 

    25 #include "Configuration.h"

    26 

    27 namespace relpipe {

    28 namespace tr {

    29 namespace grep {

    30 

    31 class CLIParser {

    32 private:

    33 

    34 	relpipe::common::type::StringX readNext(std::vector<relpipe::common::type::StringX> arguments, int& i) {

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

    36 		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);

    37 	}

    38 

    39 	void addRelation(Configuration& c, RelationConfiguration& currentRelation) {

    40 		if (currentRelation.relation.size()) {

    41 			c.relationConfigurations.push_back(currentRelation);

    42 			currentRelation = RelationConfiguration();

    43 		}

    44 	}

    45 

    46 public:

    47 

    48 	static const relpipe::common::type::StringX OPTION_RELATION;

    49 	static const relpipe::common::type::StringX OPTION_ATTRIBUTE;

    50 	static const relpipe::common::type::StringX OPTION_PATTERN;

    51 

    52 	Configuration parse(const std::vector<relpipe::common::type::StringX>& arguments) {

    53 		Configuration c;

    54 		RelationConfiguration currentRelation;

    55 

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

    57 			relpipe::common::type::StringX option = readNext(arguments, i);

    58 

    59 			if (option == OPTION_RELATION) {

    60 				addRelation(c, currentRelation); // previous relation

    61 				currentRelation.relation = readNext(arguments, i);

    62 				currentRelation.relationPattern = std::wregex(currentRelation.relation);

    63 			} else if (option == OPTION_ATTRIBUTE) {

    64 				currentRelation.attributePattern = std::wregex(readNext(arguments, i));

    65 			} else if (option == OPTION_PATTERN) {

    66 				currentRelation.valuePattern = std::wregex(readNext(arguments, i));

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

    68 		}

    69 		addRelation(c, currentRelation); // last relation

    70 

    71 		return c;

    72 	}

    73 

    74 	virtual ~CLIParser() {

    75 	}

    76 };

    77 

    78 const relpipe::common::type::StringX CLIParser::OPTION_RELATION = L"--relation";

    79 const relpipe::common::type::StringX CLIParser::OPTION_ATTRIBUTE = L"--attribute";

    80 const relpipe::common::type::StringX CLIParser::OPTION_PATTERN = L"--pattern";

    81 

    82 }

    83 }

    84 }