// Zoe AIM Away Message RSS Feed Generator
//
// Douglas Thrift
//
// $Id$

#include "Matcher.hpp"

Matcher::Matcher(const ext::String& expression) : expression(NULL)
{
	(*this)(expression);
}

Matcher::~Matcher()
{
	if (expression != NULL)
	{
		pcre_free(expression);
	}
}

bool Matcher::match(const ext::String& stuff)
{
	substrings.clear();

	if (expression != NULL)
	{
		int length;

		pcre_fullinfo(expression, NULL, PCRE_INFO_CAPTURECOUNT, &length);

		int* substrings(new int[(++length *= 3)]);
		int count(pcre_exec(expression, NULL, stuff.c_str(), stuff.length(), 0, 0,
			substrings, length));

		if (count > 0)
		{
			char* substring(new char[stuff.length() + 1]);

			for (int index(0); index < count; ++index)
			{
				pcre_copy_substring(stuff.c_str(), substrings, count, index,
					substring, stuff.length() + 1);

				this->substrings.push_back(substring);
			}

			delete [] substring;
			delete [] substrings;
			return true;
		}

		delete [] substrings;
	}

	return false;
}

Matcher& Matcher::operator()(const ext::String& expression)
{
	substrings.clear();

	if (this->expression != NULL)
	{
		pcre_free(this->expression);
	}

	const char* error;
	int offset;

	this->expression = pcre_compile(expression.c_str(), 0, &error,
		&offset, NULL);

	return *this;
}