gistfile1.m

#import "WebServerBaseViewController.h"
#import "GogobotApi.h"
#import "NXOAuth2Client.h"
#import "UIHelpers.h"
#import "GogobotAppDelegate.h"
#import "NSDictionary+QueryString.h"

@interface WebServerBaseViewController (Private)

- (void)loadWebView;

@end

@implementation WebServerBaseViewController

@synthesize webView = _webView;
//@synthesize activityIndicator = _activityIndicator;

- (NSString *)pageUrl { [self doesNotRecognizeSelector:_cmd]; @throw @""; }
- (BOOL)requireUser { [self doesNotRecognizeSelector:_cmd]; @throw @""; }
- (BOOL)showNavigationBarInWebView { return YES; }

- (BOOL)nibbable { return YES; }
- (NSString *)nibName { return @"WebServerBaseViewController"; }

- (void)viewDidLoad {
	[super viewDidLoad];
	
	[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(backToInitialUrlAndRefresh) name:kLoginSuccessfulNotificationKey object:nil];
	[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(backToInitialUrlAndRefresh) name:kLogoutSuccessfulNotificationKey object:nil];
	
	
	// disables bounce of the webview on scroll. bounce should be implemented in the html page
	for (id subview in _webView.subviews) {
		if ([[subview class] isSubclassOfClass: [UIScrollView class]]) {
			((UIScrollView *)subview).bounces = NO;
		}
	}
}

- (void)backToInitialUrlAndRefresh {
	[self loadWebView];
}

- (void)loadWebView {
	NSString *accessToken = [[GogobotApi sharedInstance] oAuthClient].accessToken.accessToken;
	
	if ([self requireUser] && !accessToken) return;

	NSMutableString *url = [NSMutableString stringWithFormat:@"mobile/%@", [self pageUrl]];

	[url appendString:[url rangeOfString:@"?"].location == NSNotFound ? @"?" : @"&"];
	
	if (![self showNavigationBarInWebView]) [url appendString:@"show_nav_bar=0"];
	
	if ([self requireUser]) {
		NSMutableDictionary *qs = [NSMutableDictionary dictionaryWithObjectsAndKeys:
								   accessToken, @"oauth_access_token",
								   url, @"return_url",
								   nil];
		
		url = [NSMutableString stringWithFormat:@"mobile/users/authenticate?%@", [qs urlEncodedString]];
	}

	url = [NSMutableString stringWithFormat:@"%@%@", GOGOBOT_MOBILE_SITE_URL, url];
	
	GOGO_LOG(@"WebView (%@) URL = %@", [self class], url);
	
	NSURLRequest *request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:url]];
	[_webView loadRequest:request];
	[request release];
	
	_webViewRequestSent = YES;
}

- (void)updateBackButton {
    if ([self.webView canGoBack]) {
        if (!self.navigationItem.leftBarButtonItem) {
            [self.navigationItem setHidesBackButton:YES animated:YES];
            UIBarButtonItem *backItem = [[[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(backWasClicked:)] autorelease];
            [self.navigationItem setLeftBarButtonItem:backItem animated:YES];
        }
    }
    else {
        [self.navigationItem setLeftBarButtonItem:nil animated:YES];
        [self.navigationItem setHidesBackButton:NO animated:YES];
    }
}

- (void)webViewDidStartLoad:(UIWebView *)webView {
//	[_activityIndicator startAnimating];
    [self updateBackButton];
	
	[UIHelpers showActivityLabelInView:self.view];
}

- (void)webViewDidFinishLoad:(UIWebView *)webView {
//	[_activityIndicator stopAnimating];
    [self updateBackButton];
	[UIHelpers hideActivityLabelInView:self.view];
}

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
//	[_activityIndicator stopAnimating];
	[UIHelpers hideActivityLabelInView:self.view];

	GOGO_LOG(@"Error loading webview = %@", error);
}

- (void)backWasClicked:(id)sender {
    if ([self.webView canGoBack]) {
        [self.webView goBack];
    }
}

- (void)viewWillAppear:(BOOL)animated {
	if (
		[self requireUser] &&
		![[UIHelpers appDelegate] requireUserOnViewController:self]){
		return;
	}

	[super viewWillAppear:animated];
	
	if ([self showNavigationBarInWebView]) {
		[[self navigationController] setNavigationBarHidden:YES animated:NO];
	}
	
	if (!_webViewRequestSent) [self loadWebView];
}

- (void)viewWillDisappear:(BOOL)animated {
	[super viewWillDisappear:animated];
	
}

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    if (navigationType == UIWebViewNavigationTypeLinkClicked) {
        [[UIApplication sharedApplication] openURL:request.URL];
        return false;
    }
    return true;
}



- (void)didReceiveMemoryWarning {
	[super didReceiveMemoryWarning];
	
	if (self.isViewLoaded && self.view.window) return;
	
	// make it load deafult about:blank 
	[_webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"about:blank"]]];
	_webViewRequestSent = NO;
}

- (void)viewDidUnload {
	self.webView = nil;
//	self.activityIndicator = nil;
	
	[[NSNotificationCenter defaultCenter] removeObserver:self name:kLoginSuccessfulNotificationKey object:nil];
	[[NSNotificationCenter defaultCenter] removeObserver:self name:kLogoutSuccessfulNotificationKey object:nil];
	
	[super viewDidUnload];
}

- (void)dealloc {
	[_webView release];
//	[_activityIndicator release];
	
	[super dealloc];
}

//- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request
// navigationType:(UIWebViewNavigationType)navigationType {
//    NSString *url = [[request URL] description];
//	
//    // Check for protocol type and determine routing
//    if (navigationType == UIWebViewNavigationTypeOther) {
//        return YES;
//    } else if ([url hasPrefix:@"miso://ajax"]) {
////        [_ajaxController fireAjaxRequest:url];
//        return NO;
//    } else {
//        // RoutesController delegates native app actions given a miso://<controller>/<action>?<params>
////        [[RoutesController instance] processRoute:url viewController:_vc webview:self];
//        return NO;
//    }
//}

@end