/*
 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
 *               2018
 *   Jonathan Schleifer <js@heap.zone>
 *
 * All rights reserved.
 *
 * This file is part of ObjFW. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
 * the packaging of this file.
 *
 * Alternatively, it may be distributed under the terms of the GNU General
 * Public License, either version 2 or 3, which can be found in the file
 * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
 * file.
 */

#include "config.h"

#import "OFHTTPCookieManager.h"
#import "OFArray.h"
#import "OFDate.h"
#import "OFHTTPCookie.h"
#import "OFURL.h"

@implementation OFHTTPCookieManager
+ (instancetype)manager
{
	return [[[self alloc] init] autorelease];
}

- (instancetype)init
{
	self = [super init];

	@try {
		_cookies = [[OFMutableArray alloc] init];
	} @catch (id e) {
		[self release];
		@throw e;
	}

	return self;
}

- (void)dealloc
{
	[_cookies release];

	[super dealloc];
}

- (OFArray OF_GENERIC(OFHTTPCookie *) *)cookies
{
	return [[_cookies copy] autorelease];
}

- (void)addCookie: (OFHTTPCookie *)cookie
	   forURL: (OFURL *)URL
{
	void *pool = objc_autoreleasePoolPush();
	OFString *cookieDomain, *URLHost;
	size_t i;

	if (![[cookie path] hasPrefix: @"/"])
		[cookie setPath: @"/"];

	if ([cookie isSecure] && ![[URL scheme] isEqual: @"https"]) {
		objc_autoreleasePoolPop(pool);
		return;
	}

	cookieDomain = [[cookie domain] lowercaseString];
	[cookie setDomain: cookieDomain];

	URLHost = [[URL host] lowercaseString];
	if (![cookieDomain isEqual: URLHost]) {
		URLHost = [@"." stringByAppendingString: URLHost];

		if (![cookieDomain hasSuffix: URLHost]) {
			objc_autoreleasePoolPop(pool);
			return;
		}
	}

	i = 0;
	for (OFHTTPCookie *iter in _cookies) {
		if ([[iter name] isEqual: [cookie name]] &&
		    [[iter domain] isEqual: [cookie domain]] &&
		    [[iter path] isEqual: [cookie path]]) {
			[_cookies replaceObjectAtIndex: i
					    withObject: cookie];

			objc_autoreleasePoolPop(pool);
			return;
		}

		i++;
	}

	[_cookies addObject: cookie];

	objc_autoreleasePoolPop(pool);
}

- (void)addCookies: (OFArray OF_GENERIC(OFHTTPCookie *) *)cookies
	    forURL: (OFURL *)URL
{
	for (OFHTTPCookie *cookie in cookies)
		[self addCookie: cookie
			 forURL: URL];
}

- (OFArray OF_GENERIC(OFHTTPCookie *) *)cookiesForURL: (OFURL *)URL
{
	OFMutableArray *ret = [OFMutableArray array];

	for (OFHTTPCookie *cookie in _cookies) {
		void *pool;
		OFDate *expires;
		OFString *cookieDomain, *URLHost, *cookiePath, *URLPath;
		bool match;

		expires = [cookie expires];
		if (expires != nil && [expires timeIntervalSinceNow] <= 0)
			continue;

		if ([cookie isSecure] && ![[URL scheme] isEqual: @"https"])
			continue;

		pool = objc_autoreleasePoolPush();

		cookieDomain = [[cookie domain] lowercaseString];
		URLHost = [[URL host] lowercaseString];
		if ([cookieDomain hasPrefix: @"."]) {
			if ([URLHost hasSuffix: cookieDomain])
				match = true;
			else {
				cookieDomain = [cookieDomain substringWithRange:
				    of_range(1, [cookieDomain length] - 1)];

				match = [cookieDomain isEqual: URLHost];
			}
		} else
			match = [cookieDomain isEqual: URLHost];

		if (!match) {
			objc_autoreleasePoolPop(pool);
			continue;
		}

		cookiePath = [cookie path];
		URLPath = [URL path];
		if (![cookiePath isEqual: @"/"]) {
			if ([cookiePath isEqual: URLPath])
				match = true;
			else {
				if (![cookiePath hasSuffix: @"/"])
					cookiePath = [cookiePath
					    stringByAppendingString: @"/"];

				match = [URLPath hasPrefix: cookiePath];
			}

			if (!match) {
				objc_autoreleasePoolPop(pool);
				continue;
			}
		}

		[ret addObject: cookie];
	}

	[ret makeImmutable];

	return ret;
}

- (void)purgeExpiredCookies
{
	for (size_t i = 0, count = [_cookies count]; i < count; i++) {
		OFDate *expires = [[_cookies objectAtIndex: i] expires];

		if (expires != nil && [expires timeIntervalSinceNow] <= 0) {
			[_cookies removeObjectAtIndex: i];

			i--;
			count--;
			continue;
		}
	}
}
@end