/**
* Relational pipes
* Copyright © 2018 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 <memory>
#include <string>
#include <vector>
#include <iostream>
#include <sstream>
#include <locale>
#include <codecvt>
#include <regex>
#include <relpipe/reader/typedefs.h>
#include <relpipe/reader/TypeId.h>
#include <relpipe/reader/handlers/RelationalReaderStringHandler.h>
#include <relpipe/reader/handlers/AttributeMetadata.h>
#include <relpipe/writer/Factory.h>
#include <relpipe/cli/RelpipeCLIException.h>
namespace relpipe {
namespace tr {
namespace sed {
using namespace std;
using namespace relpipe;
using namespace relpipe::reader;
using namespace relpipe::reader::handlers;
class SedHandler : public RelationalReaderStringHandler {
private:
shared_ptr<writer::RelationalWriter> relationalWriter;
wregex relationNameRegEx;
wregex attributeNameRegEx;
wregex searchRegEx;
string_t replacement;
vector<boolean_t> currentReplacableAttributes;
integer_t currentAttributeIndex = 0;
public:
SedHandler(ostream& output, const vector<string_t>& arguments) {
relationalWriter.reset(writer::Factory::create(output));
if (arguments.size() == 4) {
relationNameRegEx = wregex(arguments[0]);
attributeNameRegEx = wregex(arguments[1]);
searchRegEx = wregex(arguments[2]);
replacement = arguments[3];
} else {
throw cli::RelpipeCLIException(L"Usage: relpipe-tr-sed <relationNameRegExp> <attributeNameRegExp> <searchRegExp> <replacement>", cli::CLI::EXIT_CODE_UNKNOWN_COMMAND);
}
}
void startRelation(string_t name, vector<AttributeMetadata> attributes) override {
// TODO: move to a reusable method (or use same metadata on both reader and writer side?)
vector<writer::AttributeMetadata> writerMetadata;
for (AttributeMetadata readerMetadata : attributes) {
writerMetadata.push_back({readerMetadata.getAttributeName(), relationalWriter->toTypeId(readerMetadata.getTypeName())});
}
currentReplacableAttributes.resize(attributes.size(), false);
if (regex_match(name, relationNameRegEx)) {
for (int i = 0; i < currentReplacableAttributes.size(); i++) {
currentReplacableAttributes[i] = regex_match(attributes[i].getAttributeName(), attributeNameRegEx);
}
}
relationalWriter->startRelation(name, writerMetadata, true);
}
void attribute(const string_t& value) override {
if (currentReplacableAttributes[currentAttributeIndex]) {
relationalWriter->writeAttribute(regex_replace(value, searchRegEx, replacement));
} else {
relationalWriter->writeAttribute(value);
}
currentAttributeIndex++;
currentAttributeIndex = currentAttributeIndex % currentReplacableAttributes.size();
}
void endOfPipe() {
}
};
}
}
}