ASIAuthenticationDialog.m

//
//  ASIAuthenticationDialog.m
//  Part of ASIHTTPRequest -> http://allseeing-i.com/ASIHTTPRequest
//
//  Created by Ben Copsey on 21/08/2009.
//  Copyright 2009 All-Seeing Interactive. All rights reserved.
//

#import "ASIAuthenticationDialog.h"
#import "ASIHTTPRequest.h"
#import <QuartzCore/QuartzCore.h>

static ASIAuthenticationDialog *sharedDialog = nil;
BOOL isDismissing = NO;
static NSMutableArray *requestsNeedingAuthentication = nil;

static const NSUInteger kUsernameRow = 0;
static const NSUInteger kUsernameSection = 0;
static const NSUInteger kPasswordRow = 1;
static const NSUInteger kPasswordSection = 0;
static const NSUInteger kDomainRow = 0;
static const NSUInteger kDomainSection = 1;


@implementation ASIAutorotatingViewController

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
	return YES;
}

@end


@interface ASIAuthenticationDialog ()
- (void)showTitle;
- (void)show;
- (NSArray *)requestsRequiringTheseCredentials;
- (void)presentNextDialog;
- (void)keyboardWillShow:(NSNotification *)notification;
- (void)orientationChanged:(NSNotification *)notification;
- (void)cancelAuthenticationFromDialog:(id)sender;
- (void)loginWithCredentialsFromDialog:(id)sender;
@property (retain) UITableView *tableView;
@end

@implementation ASIAuthenticationDialog

#pragma mark init / dealloc

+ (void)initialize
{
	if (self == [ASIAuthenticationDialog class]) {
		requestsNeedingAuthentication = [[NSMutableArray array] retain];
	}
}

+ (void)presentAuthenticationDialogForRequest:(ASIHTTPRequest *)theRequest
{
	// No need for a lock here, this will always be called on the main thread
	if (!sharedDialog) {
		sharedDialog = [[self alloc] init];
		[sharedDialog setRequest:theRequest];
		if ([theRequest authenticationNeeded] == ASIProxyAuthenticationNeeded) {
			[sharedDialog setType:ASIProxyAuthenticationType];
		} else {
			[sharedDialog setType:ASIStandardAuthenticationType];
		}
		[sharedDialog show];
	} else {
		[requestsNeedingAuthentication addObject:theRequest];
	}
}

- (id)init
{
	if ((self = [self initWithNibName:nil bundle:nil])) {
		[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_3_2
		if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
#endif
			if (![UIDevice currentDevice].generatesDeviceOrientationNotifications) {
				[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
				[self setDidEnableRotationNotifications:YES];
			}
			[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationChanged:) name:UIDeviceOrientationDidChangeNotification object:nil];
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_3_2
		}
#endif
	}
	return self;
}

- (void)dealloc
{
	if ([self didEnableRotationNotifications]) {
		[[NSNotificationCenter defaultCenter] removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil];
	}
	[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];

	[request release];
	[tableView release];
	[presentingController.view removeFromSuperview];
	[presentingController release];
	[super dealloc];
}

#pragma mark keyboard notifications

- (void)keyboardWillShow:(NSNotification *)notification
{
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_3_2
	if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
#endif
#if __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_3_2
		NSValue *keyboardBoundsValue = [[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey];
#else
		NSValue *keyboardBoundsValue = [[notification userInfo] objectForKey:UIKeyboardBoundsUserInfoKey];
#endif
		CGRect keyboardBounds;
		[keyboardBoundsValue getValue:&keyboardBounds];
		UIEdgeInsets e = UIEdgeInsetsMake(0, 0, keyboardBounds.size.height, 0);
		[[self tableView] setScrollIndicatorInsets:e];
		[[self tableView] setContentInset:e];
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_3_2
	}
#endif
}

// Manually handles orientation changes on iPhone
- (void)orientationChanged:(NSNotification *)notification
{
	[self showTitle];
	
	UIInterfaceOrientation o = (UIInterfaceOrientation)[[UIApplication sharedApplication] statusBarOrientation];
	CGFloat angle = 0;
	switch (o) {
		case UIDeviceOrientationLandscapeLeft: angle = 90; break;
		case UIDeviceOrientationLandscapeRight: angle = -90; break;
		case UIDeviceOrientationPortraitUpsideDown: angle = 180; break;
		default: break;
	}

	CGRect f = [[UIScreen mainScreen] applicationFrame];

	// Swap the frame height and width if necessary
 	if (UIDeviceOrientationIsLandscape(o)) {
		CGFloat t;
		t = f.size.width;
		f.size.width = f.size.height;
		f.size.height = t;
	}

	CGAffineTransform previousTransform = self.view.layer.affineTransform;
	CGAffineTransform newTransform = CGAffineTransformMakeRotation((CGFloat)(angle * M_PI / 180.0));

	// Reset the transform so we can set the size
	self.view.layer.affineTransform = CGAffineTransformIdentity;
	self.view.frame = (CGRect){ { 0, 0 }, f.size};

	// Revert to the previous transform for correct animation
	self.view.layer.affineTransform = previousTransform;

	[UIView beginAnimations:nil context:NULL];
	[UIView setAnimationDuration:0.3];

	// Set the new transform
	self.view.layer.affineTransform = newTransform;

	// Fix the view origin
	self.view.frame = (CGRect){ { f.origin.x, f.origin.y },self.view.frame.size};
    [UIView commitAnimations];
}
		 
#pragma mark utilities

- (UIViewController *)presentingController
{
	if (!presentingController) {
		presentingController = [[ASIAutorotatingViewController alloc] initWithNibName:nil bundle:nil];

		// Attach to the window, but don't interfere.
		UIWindow *window = [[[UIApplication sharedApplication] windows] objectAtIndex:0];
		[window addSubview:[presentingController view]];
		[[presentingController view] setFrame:CGRectZero];
		[[presentingController view] setUserInteractionEnabled:NO];
	}

	return presentingController;
}

- (UITextField *)textFieldInRow:(NSUInteger)row section:(NSUInteger)section
{
	return [[[[[self tableView] cellForRowAtIndexPath:
			   [NSIndexPath indexPathForRow:row inSection:section]]
			  contentView] subviews] objectAtIndex:0];
}

- (UITextField *)usernameField
{
	return [self textFieldInRow:kUsernameRow section:kUsernameSection];
}

- (UITextField *)passwordField
{
	return [self textFieldInRow:kPasswordRow section:kPasswordSection];
}

- (UITextField *)domainField
{
	return [self textFieldInRow:kDomainRow section:kDomainSection];
}

#pragma mark show / dismiss

+ (void)dismiss
{
	if ([sharedDialog respondsToSelector:@selector(presentingViewController)])
		[[sharedDialog presentingViewController] dismissModalViewControllerAnimated:YES];
	else 
		[[sharedDialog parentViewController] dismissModalViewControllerAnimated:YES];
}

- (void)viewDidDisappear:(BOOL)animated
{
	[self retain];
	[sharedDialog release];
	sharedDialog = nil;
	[self performSelector:@selector(presentNextDialog) withObject:nil afterDelay:0];
	[self release];
}

- (void)dismiss
{
	if (self == sharedDialog) {
		[[self class] dismiss];
	} else {
		if ([self respondsToSelector:@selector(presentingViewController)])
			[[self presentingViewController] dismissModalViewControllerAnimated:YES];
		else
			[[self parentViewController] dismissModalViewControllerAnimated:YES];
	}
}

- (void)showTitle
{
	UINavigationBar *navigationBar = [[[self view] subviews] objectAtIndex:0];
	UINavigationItem *navItem = [[navigationBar items] objectAtIndex:0];
	if (UIInterfaceOrientationIsPortrait([[UIDevice currentDevice] orientation])) {
		// Setup the title
		if ([self type] == ASIProxyAuthenticationType) {
			[navItem setPrompt:@"Login to this secure proxy server."];
		} else {
			[navItem setPrompt:@"Login to this secure server."];
		}
	} else {
		[navItem setPrompt:nil];
	}
	[navigationBar sizeToFit];
	CGRect f = [[self view] bounds];
	f.origin.y = [navigationBar frame].size.height;
	f.size.height -= f.origin.y;
	[[self tableView] setFrame:f];
}

- (void)show
{
	// Remove all subviews
	UIView *v;
	while ((v = [[[self view] subviews] lastObject])) {
		[v removeFromSuperview];
	}

	// Setup toolbar
	UINavigationBar *bar = [[[UINavigationBar alloc] init] autorelease];
	[bar setAutoresizingMask:UIViewAutoresizingFlexibleWidth];

	UINavigationItem *navItem = [[[UINavigationItem alloc] init] autorelease];
	bar.items = [NSArray arrayWithObject:navItem];

	[[self view] addSubview:bar];

	[self showTitle];

	// Setup toolbar buttons
	if ([self type] == ASIProxyAuthenticationType) {
		[navItem setTitle:[[self request] proxyHost]];
	} else {
		[navItem setTitle:[[[self request] url] host]];
	}

	[navItem setLeftBarButtonItem:[[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancelAuthenticationFromDialog:)] autorelease]];
	[navItem setRightBarButtonItem:[[[UIBarButtonItem alloc] initWithTitle:@"Login" style:UIBarButtonItemStyleDone target:self action:@selector(loginWithCredentialsFromDialog:)] autorelease]];

	// We show the login form in a table view, similar to Safari's authentication dialog
	[bar sizeToFit];
	CGRect f = [[self view] bounds];
	f.origin.y = [bar frame].size.height;
	f.size.height -= f.origin.y;

	[self setTableView:[[[UITableView alloc] initWithFrame:f style:UITableViewStyleGrouped] autorelease]];
	[[self tableView] setDelegate:self];
	[[self tableView] setDataSource:self];
	[[self tableView] setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];
	[[self view] addSubview:[self tableView]];

	// Force reload the table content, and focus the first field to show the keyboard
	[[self tableView] reloadData];
	[[[[[self tableView] cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]].contentView subviews] objectAtIndex:0] becomeFirstResponder];

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_3_2
	if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
		[self setModalPresentationStyle:UIModalPresentationFormSheet];
	}
#endif

	[[self presentingController] presentModalViewController:self animated:YES];
}

#pragma mark button callbacks

- (void)cancelAuthenticationFromDialog:(id)sender
{
	for (ASIHTTPRequest *theRequest in [self requestsRequiringTheseCredentials]) {
		[theRequest cancelAuthentication];
		[requestsNeedingAuthentication removeObject:theRequest];
	}
	[self dismiss];
}

- (NSArray *)requestsRequiringTheseCredentials
{
	NSMutableArray *requestsRequiringTheseCredentials = [NSMutableArray array];
	NSURL *requestURL = [[self request] url];
	for (ASIHTTPRequest *otherRequest in requestsNeedingAuthentication) {
		NSURL *theURL = [otherRequest url];
		if (([otherRequest authenticationNeeded] == [[self request] authenticationNeeded]) && [[theURL host] isEqualToString:[requestURL host]] && ([theURL port] == [requestURL port] || ([requestURL port] && [[theURL port] isEqualToNumber:[requestURL port]])) && [[theURL scheme] isEqualToString:[requestURL scheme]] && ((![otherRequest authenticationRealm] && ![[self request] authenticationRealm]) || ([otherRequest authenticationRealm] && [[self request] authenticationRealm] && [[[self request] authenticationRealm] isEqualToString:[otherRequest authenticationRealm]]))) {
			[requestsRequiringTheseCredentials addObject:otherRequest];
		}
	}
	[requestsRequiringTheseCredentials addObject:[self request]];
	return requestsRequiringTheseCredentials;
}

- (void)presentNextDialog
{
	if ([requestsNeedingAuthentication count]) {
		ASIHTTPRequest *nextRequest = [requestsNeedingAuthentication objectAtIndex:0];
		[requestsNeedingAuthentication removeObjectAtIndex:0];
		[[self class] presentAuthenticationDialogForRequest:nextRequest];
	}
}


- (void)loginWithCredentialsFromDialog:(id)sender
{
	for (ASIHTTPRequest *theRequest in [self requestsRequiringTheseCredentials]) {

		NSString *username = [[self usernameField] text];
		NSString *password = [[self passwordField] text];

		if (username == nil) { username = @""; }
		if (password == nil) { password = @""; }

		if ([self type] == ASIProxyAuthenticationType) {
			[theRequest setProxyUsername:username];
			[theRequest setProxyPassword:password];
		} else {
			[theRequest setUsername:username];
			[theRequest setPassword:password];
		}

		// Handle NTLM domains
		NSString *scheme = ([self type] == ASIStandardAuthenticationType) ? [[self request] authenticationScheme] : [[self request] proxyAuthenticationScheme];
		if ([scheme isEqualToString:(NSString *)kCFHTTPAuthenticationSchemeNTLM]) {
			NSString *domain = [[self domainField] text];
			if ([self type] == ASIProxyAuthenticationType) {
				[theRequest setProxyDomain:domain];
			} else {
				[theRequest setDomain:domain];
			}
		}

		[theRequest retryUsingSuppliedCredentials];
		[requestsNeedingAuthentication removeObject:theRequest];
	}
	[self dismiss];
}

#pragma mark table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)aTableView
{
	NSString *scheme = ([self type] == ASIStandardAuthenticationType) ? [[self request] authenticationScheme] : [[self request] proxyAuthenticationScheme];
	if ([scheme isEqualToString:(NSString *)kCFHTTPAuthenticationSchemeNTLM]) {
		return 2;
	}
	return 1;
}

- (CGFloat)tableView:(UITableView *)aTableView heightForFooterInSection:(NSInteger)section
{
	if (section == [self numberOfSectionsInTableView:aTableView]-1) {
		return 30;
	}
	return 0;
}

- (CGFloat)tableView:(UITableView *)aTableView heightForHeaderInSection:(NSInteger)section
{
	if (section == 0) {
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_3_2
		if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
			return 54;
		}
#endif
		return 30;
	}
	return 0;
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
	if (section == 0) {
		return [[self request] authenticationRealm];
	}
	return nil;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
#if __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_3_0
	UITableViewCell *cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil] autorelease];
#else
	UITableViewCell *cell = [[[UITableViewCell alloc] initWithFrame:CGRectMake(0,0,0,0) reuseIdentifier:nil] autorelease];
#endif

	[cell setSelectionStyle:UITableViewCellSelectionStyleNone];

	CGRect f = CGRectInset([cell bounds], 10, 10);
	UITextField *textField = [[[UITextField alloc] initWithFrame:f] autorelease];
	[textField setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];
	[textField setAutocapitalizationType:UITextAutocapitalizationTypeNone];
	[textField setAutocorrectionType:UITextAutocorrectionTypeNo];

	NSUInteger s = [indexPath section];
	NSUInteger r = [indexPath row];

	if (s == kUsernameSection && r == kUsernameRow) {
		[textField setPlaceholder:@"User"];
	} else if (s == kPasswordSection && r == kPasswordRow) {
		[textField setPlaceholder:@"Password"];
		[textField setSecureTextEntry:YES];
	} else if (s == kDomainSection && r == kDomainRow) {
		[textField setPlaceholder:@"Domain"];
	}
	[cell.contentView addSubview:textField];

	return cell;
}

- (NSInteger)tableView:(UITableView *)aTableView numberOfRowsInSection:(NSInteger)section
{
	if (section == 0) {
		return 2;
	} else {
		return 1;
	}
}

- (NSString *)tableView:(UITableView *)aTableView titleForFooterInSection:(NSInteger)section
{
	if (section == [self numberOfSectionsInTableView:aTableView]-1) {
		// If we're using Basic authentication and the connection is not using SSL, we'll show the plain text message
		if ([[[self request] authenticationScheme] isEqualToString:(NSString *)kCFHTTPAuthenticationSchemeBasic] && ![[[[self request] url] scheme] isEqualToString:@"https"]) {
			return @"Password will be sent in the clear.";
		// We are using Digest, NTLM, or any scheme over SSL
		} else {
			return @"Password will be sent securely.";
		}
	}
	return nil;
}

#pragma mark -

@synthesize request;
@synthesize type;
@synthesize tableView;
@synthesize didEnableRotationNotifications;
@synthesize presentingController;
@end