example_9.cpp

#include <iostream>
#include <memory>
#include <optional>
 
#include "parser.h"
#include "parser_builder.h"
#include "parser_provider.h"
#include "simple_extractor.h"
 
using namespace doctotext;
 
 
class CustomParser : public doctotext::Parser
{
  void parse() const override
  {
    // parsing process (see doctotext::Parser)
  }
 
  virtual Parser &addOnNewNodeCallback(NewNodeCallback callback) override
  {
    // manage callbacks (see doctotext::Parser)
    return *this;
  }
};
 
class CustomParserBuilder : public doctotext::ParserBuilder
{
  std::unique_ptr<Parser> build(const std::string &inFileName) const override
  {
    // build new parser from file (see doctotext::ParserBuilder)
  }
 
  std::unique_ptr<Parser> build(const char *buffer, size_t size) const override
  {
    // build new parser from data buffer (see doctotext::ParserBuilder)
  }
 
};
 
 
 
#include <boost/config.hpp>
 
class CustomParserProvider : public doctotext::ParserProvider
{
  std::optional<ParserBuilder*> findParserByExtension(const std::string &extension) const override
  {
      return std::nullopt;
  }
 
  std::optional<ParserBuilder*> findParserByData(const std::vector<char>& buffer) const override
  {
    return std::nullopt;
  }
 
  std::set<std::string> getAvailableExtensions() const override
  {
    return {".custom"};
  }
 
};
 
extern "C" BOOST_SYMBOL_EXPORT CustomParserProvider custom_parser_provider;
CustomParserProvider custom_parser_provider;
 
 
 
int main(int argc, char* argv[])
{
  doctotext::SimpleExtractor extractor("file.custom", "path_tp_directory_with_plugins");
  std::cout << extractor.getPlainText();
  return 0;
}