example_3.cpp

 
#include <iostream>
#include <memory>
 
#include "parser.h"
#include "importer.h"
#include "exporter.h"
#include "transformer.h"
#include "parsing_chain.h"
 
int main(int argc, char* argv[])
{
  doctotext::Importer(argv[1])
    | doctotext::TransformerFunc([](doctotext::Info &info) // Create an importer from file name and connect it to transformer
                                    {
                                      if (info.tag_name == doctotext::StandardTag::TAG_MAIL) // if current node is mail
                                      {
                                        auto subject = info.getAttributeValue<std::string>("subject"); // get the subject attribute
                                        if (subject) // if subject attribute exists
                                        {
                                          if (subject->find("Hello") != std::string::npos) // if subject contains "Hello"
                                          {
                                            info.skip = true; // skip the current node
                                          }
                                        }
                                      }
                                    })
    | doctotext::PlainTextExporter() // sets exporter to plain text
    | std::cout; // sets output stream
  return 0;
}