Using transformer to filter out emails (eg. from Outlook PST mailbox) with subject containing "Hello"

#include "docwire.h"

 

int main(int argc, char* argv[])

{

using namespace docwire

std::filesystem::path("1.pst") | content_type::detector{} |

mail_parser{} | office_formats_parser{}

| [](Tag&& tag, const emission_callbacks& emit_tag) // Create an input from file path, parser and connect them to transformer

{

if (std::holds_alternative<tag::Mail>(tag)) // if current node is mail

{

auto subject = std::get<tag::Mail>(tag).subject // get the subject attribute

if (subject) // if subject attribute exists

{

if (subject->find("Hello") != std::string::npos) // if subject contains "Hello"

{

return continuation::skip // skip the current node

}

}

}

return emit_tag(std::move(tag))

}

| PlainTextExporter() // sets exporter to plain text

| std::cout

return 0

}