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/*
 * Copyright (c) 2011 Remko Tronçon
 * Licensed under the GNU General Public License v3.
 * See Documentation/Licenses/GPLv3.txt for more information.
 */

#include <SwifTools/URIHandler/XMPPURI.h>

#include <Swiften/Base/URL.h>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/algorithm/string/find_format.hpp>
#include <boost/algorithm/string/formatter.hpp>
#include <boost/algorithm/string/find_iterator.hpp>
#include <boost/algorithm/string/split.hpp>
#include <boost/algorithm/string/classification.hpp>
#include <sstream>
#include <stdexcept>
#include <vector>

using namespace Swift;


XMPPURI::XMPPURI() {
}

XMPPURI XMPPURI::fromString(const std::string& s) {
	XMPPURI result;
	if (boost::starts_with(s, "xmpp:")) {
		std::string uri = s.substr(5, s.npos);
		bool parsePath = true;
		bool parseQuery = true;
		bool parseFragment = true;

		// Parse authority
		if (boost::starts_with(uri, "//")) {
			size_t i = uri.find_first_of("/#?", 2);
			result.setAuthority(JID(URL::unescape(uri.substr(2, i - 2))));
			if (i == uri.npos) {
				uri = "";
				parsePath = parseQuery = parseFragment = false;
			}
			else {
				if (uri[i] == '?') {
					parsePath = false;
				}
				else if (uri[i] == '#') {
					parseQuery = parsePath = false;
				}
				uri = uri.substr(i + 1, uri.npos);
			}
		}

		// Parse path
		if (parsePath) {
			size_t i = uri.find_first_of("#?");
			result.setPath(JID(URL::unescape(uri.substr(0, i))));
			if (i == uri.npos) {
				uri = "";
				parseQuery = parseFragment = false;
			}
			else {
				if (uri[i] == '#') {
					parseQuery = false;
				}
				uri = uri.substr(i + 1, uri.npos);
			}
		}

		// Parse query
		if (parseQuery) {
			size_t end = uri.find_first_of("#");
			std::string query = uri.substr(0, end);
			bool haveType = false;
			typedef boost::split_iterator<std::string::iterator> split_iterator;
	    for (split_iterator it = boost::make_split_iterator(query, boost::first_finder(";")); it != split_iterator(); ++it) {
	    	if (haveType) {
	    		std::vector<std::string> keyValue;
	    		boost::split(keyValue, *it, boost::is_any_of("="));
	    		if (keyValue.size() == 1) {
	    			result.addQueryParameter(URL::unescape(keyValue[0]), "");
	    		}
	    		else if (keyValue.size() >= 2) {
	    			result.addQueryParameter(URL::unescape(keyValue[0]), URL::unescape(keyValue[1]));
	    		}
	    	}
	    	else {
	    		result.setQueryType(URL::unescape(boost::copy_range<std::string>(*it)));
	    		haveType = true;
	    	}
	    }
	    uri = (end == uri.npos ? "" : uri.substr(end + 1, uri.npos));
		}

		// Parse fragment
		if (parseFragment) {
			result.setFragment(URL::unescape(uri));
		}
	}
	return result;
}