/*

 * Copyright (C) 2005 Apple Computer, Inc.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer. 

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission. 

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#import <WebKit/WebPanelAuthenticationHandler.h>

#import <Foundation/NSURLAuthenticationChallenge.h>

#import <WebKit/WebAuthenticationPanel.h>

#import <WebKit/WebNSDictionaryExtras.h>

#import <wtf/Assertions.h>

static NSString *WebModalDialogPretendWindow = @"WebModalDialogPretendWindow";

@implementation WebPanelAuthenticationHandler

WebPanelAuthenticationHandler *sharedHandler;

+ (id)sharedHandler

{

    if (sharedHandler == nil)

        sharedHandler = [[self alloc] init];

    return sharedHandler;

}

-(id)init

{

    self = [super init];

    if (self != nil) {

        windowToPanel = [[NSMutableDictionary alloc] init];

        challengeToWindow = [[NSMutableDictionary alloc] init];

        windowToChallengeQueue = [[NSMutableDictionary alloc] init];

    }

    return self;

}

-(void)dealloc

{

    [windowToPanel release];

    [challengeToWindow release];    

    [windowToChallengeQueue release];    

    [super dealloc];

}

-(void)enqueueChallenge:(NSURLAuthenticationChallenge *)challenge forWindow:(id)window

{

    NSMutableArray *queue = [windowToChallengeQueue objectForKey:window];

    if (queue == nil) {

        queue = [[NSMutableArray alloc] init];

        [windowToChallengeQueue _webkit_setObject:queue forUncopiedKey:window];

        [queue release];

    }

    [queue addObject:challenge];

}

-(void)tryNextChallengeForWindow:(id)window

{

    NSMutableArray *queue = [windowToChallengeQueue objectForKey:window];

    if (queue == nil) {

        return;

    }

    NSURLAuthenticationChallenge *challenge = [[queue objectAtIndex:0] retain];

    [queue removeObjectAtIndex:0];

    if ([queue count] == 0) {

        [windowToChallengeQueue removeObjectForKey:window];

    }

    NSURLCredential *latestCredential = [[NSURLCredentialStorage sharedCredentialStorage] defaultCredentialForProtectionSpace:[challenge protectionSpace]];

    if ([latestCredential hasPassword]) {

        [[challenge sender] useCredential:latestCredential forAuthenticationChallenge:challenge];

        [challenge release];

        return;

    }

    [self startAuthentication:challenge window:(window == WebModalDialogPretendWindow ? nil : window)];

    [challenge release];

}

-(void)startAuthentication:(NSURLAuthenticationChallenge *)challenge window:(NSWindow *)w

{

    id window = w ? (id)w : (id)WebModalDialogPretendWindow;

    if ([windowToPanel objectForKey:window] != nil) {

        [self enqueueChallenge:challenge forWindow:window];

        return;

    }

    // In this case, we have an attached sheet that's not one of our

    // authentication panels, so enqueing is not an option. Just

    // cancel loading instead, since this case is fairly

    // unlikely (how would you be loading a page if you had an error

    // sheet up?)

    if ([w attachedSheet] != nil) {

        [[challenge sender] cancelAuthenticationChallenge:challenge];

        return;

    }

    WebAuthenticationPanel *panel = [[WebAuthenticationPanel alloc] initWithCallback:self selector:@selector(_authenticationDoneWithChallenge:result:)];

    [challengeToWindow _webkit_setObject:window forUncopiedKey:challenge];

    [windowToPanel _webkit_setObject:panel forUncopiedKey:window];

    [panel release];

    if (window == WebModalDialogPretendWindow) {

        [panel runAsModalDialogWithChallenge:challenge];

    } else {

        [panel runAsSheetOnWindow:window withChallenge:challenge];

    }

}

-(void)cancelAuthentication:(NSURLAuthenticationChallenge *)challenge

{

    id window = [challengeToWindow objectForKey:challenge];

    if (window != nil) {

        WebAuthenticationPanel *panel = [windowToPanel objectForKey:window];

        [panel cancel:self];

    }

}

-(void)_authenticationDoneWithChallenge:(NSURLAuthenticationChallenge *)challenge result:(NSURLCredential *)credential

{

    id window = [challengeToWindow objectForKey:challenge];

    [window retain];

    if (window != nil) {

        [windowToPanel removeObjectForKey:window];

        [challengeToWindow removeObjectForKey:challenge];

    }

    if (credential == nil) {

        [[challenge sender] continueWithoutCredentialForAuthenticationChallenge:challenge];

    } else {

        [[challenge sender] useCredential:credential forAuthenticationChallenge:challenge];

    }

    [self tryNextChallengeForWindow:window];

    [window release];

}

@end