/*
   +----------------------------------------------------------------------+
   | Copyright © The PHP Group and Contributors.                          |
   +----------------------------------------------------------------------+
   | This source file is subject to the Modified BSD License that is      |
   | bundled with this package in the file LICENSE, and is available      |
   | through the World Wide Web at <https://www.php.net/license/>.        |
   |                                                                      |
   | SPDX-License-Identifier: BSD-3-Clause                                |
   +----------------------------------------------------------------------+
   | Author: Arpad Ray <arpad@php.net>                                    |
   +----------------------------------------------------------------------+
 */

#include "php.h"
#include "php_session.h"

#define PS_SANITY_CHECK \
	if (PS(session_status) != php_session_active) { \
		zend_throw_error(NULL, "Session is not active"); \
		RETURN_THROWS(); \
	} \
	if (PS(default_mod) == NULL) { \
		zend_throw_error(NULL, "Cannot call default session handler"); \
		RETURN_THROWS(); \
	}

#define PS_SANITY_CHECK_IS_OPEN \
	PS_SANITY_CHECK; \
	if (!PS(mod_user_is_open)) { \
		php_error_docref(NULL, E_WARNING, "Parent session handler is not open"); \
		RETURN_FALSE; \
	}

PHP_METHOD(SessionHandler, open)
{
	zend_string *save_path, *session_name;
	zend_result ret;

	if (zend_parse_parameters(ZEND_NUM_ARGS(), "SS", &save_path, &session_name) == FAILURE) {
		RETURN_THROWS();
	}

	PS_SANITY_CHECK;

	zend_try {
		ret = PS(default_mod)->s_open(&PS(mod_data), save_path, session_name);
	} zend_catch {
		PS(session_status) = php_session_none;
		zend_bailout();
	} zend_end_try();

	if (SUCCESS == ret) {
		PS(mod_user_is_open) = true;
	}

	RETURN_BOOL(SUCCESS == ret);
}

PHP_METHOD(SessionHandler, close)
{
	zend_result ret;

	// don't return on failure, since not closing the default handler
	// could result in memory leaks or other nasties
	zend_parse_parameters_none();

	PS_SANITY_CHECK_IS_OPEN;

	PS(mod_user_is_open) = false;

	zend_try {
		ret = PS(default_mod)->s_close(&PS(mod_data));
	} zend_catch {
		PS(session_status) = php_session_none;
		zend_bailout();
	} zend_end_try();

	RETURN_BOOL(SUCCESS == ret);
}

PHP_METHOD(SessionHandler, read)
{
	zend_string *val;
	zend_string *key;

	if (zend_parse_parameters(ZEND_NUM_ARGS(), "S", &key) == FAILURE) {
		RETURN_THROWS();
	}

	PS_SANITY_CHECK_IS_OPEN;

	if (PS(default_mod)->s_read(&PS(mod_data), key, &val, PS(gc_maxlifetime)) == FAILURE) {
		RETURN_FALSE;
	}

	RETURN_STR(val);
}

PHP_METHOD(SessionHandler, write)
{
	zend_string *key, *val;

	if (zend_parse_parameters(ZEND_NUM_ARGS(), "SS", &key, &val) == FAILURE) {
		RETURN_THROWS();
	}

	PS_SANITY_CHECK_IS_OPEN;

	RETURN_BOOL(SUCCESS == PS(default_mod)->s_write(&PS(mod_data), key, val, PS(gc_maxlifetime)));
}

PHP_METHOD(SessionHandler, destroy)
{
	zend_string *key;

	if (zend_parse_parameters(ZEND_NUM_ARGS(), "S", &key) == FAILURE) {
		RETURN_THROWS();
	}

	PS_SANITY_CHECK_IS_OPEN;

	RETURN_BOOL(SUCCESS == PS(default_mod)->s_destroy(&PS(mod_data), key));
}

PHP_METHOD(SessionHandler, gc)
{
	zend_long maxlifetime;
	zend_long nrdels = -1;

	if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &maxlifetime) == FAILURE) {
		RETURN_THROWS();
	}

	PS_SANITY_CHECK_IS_OPEN;

	if (PS(default_mod)->s_gc(&PS(mod_data), maxlifetime, &nrdels) == FAILURE) {
		RETURN_FALSE;
	}
	RETURN_LONG(nrdels);
}

PHP_METHOD(SessionHandler, create_sid)
{
	zend_string *id;

	ZEND_PARSE_PARAMETERS_NONE();

	PS_SANITY_CHECK;

	id = PS(default_mod)->s_create_sid(&PS(mod_data));

	RETURN_STR(id);
}
