/*

 File: AppDelegate.m

 Abstract: Main controller that houses the operation queue and 

 initializes the LocalBonjour Controller.

 Version: 1.2

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 */

#import "AppDelegate.h"

#import <SystemConfiguration/SystemConfiguration.h>

#import <netinet/in.h>

@implementation AppDelegate

@synthesize window, navController, cryptoQueue;

- (BOOL)isNetworkAvailableFlags:(SCNetworkReachabilityFlags *)outFlags {

    SCNetworkReachabilityRef    defaultRouteReachability;

    struct sockaddr_in          zeroAddress;

    bzero(&zeroAddress, sizeof(zeroAddress));

    zeroAddress.sin_len = sizeof(zeroAddress);

    zeroAddress.sin_family = AF_INET;

    defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress);

    SCNetworkReachabilityFlags flags;

    BOOL gotFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);

    if (!gotFlags) {

        return NO;

    }

    // kSCNetworkReachabilityFlagsReachable indicates that the specified nodename or address can

    // be reached using the current network configuration.

    BOOL isReachable = flags & kSCNetworkReachabilityFlagsReachable;

    // This flag indicates that the specified nodename or address can

    // be reached using the current network configuration, but a

    // connection must first be established.

    //

    // If the flag is false, we don't have a connection. But because CFNetwork

    // automatically attempts to bring up a WWAN connection, if the WWAN reachability

    // flag is present, a connection is not required.

    BOOL noConnectionRequired = !(flags & kSCNetworkReachabilityFlagsConnectionRequired);

    if ((flags & kSCNetworkReachabilityFlagsIsWWAN)) {

        noConnectionRequired = YES;

    }

    // Callers of this method might want to use the reachability flags, so if an 'out' parameter

    // was passed in, assign the reachability flags to it.

    if (outFlags) {

        *outFlags = flags;

    }

    return isReachable && noConnectionRequired;

}

- (void)applicationDidFinishLaunching:(UIApplication *)application {    

    // Is WiFi network available? That's necessary to use Bonjour.

    if ([self isNetworkAvailableFlags:NULL] == NO) {

        // open an alert with just an OK button

        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No WiFi network available." 

                                                        message:@"Exit this app and enable WiFi using the Settings application."

                                                       delegate:self 

                                              cancelButtonTitle:@"OK" 

                                              otherButtonTitles: nil];

        [alert show];   

        [alert release];

    }

    else {  

        // Add the controller's view as a subview of the window

        [self.window addSubview:navController.view]; 

        NSOperationQueue * theQueue = [[NSOperationQueue alloc] init];

        self.cryptoQueue = theQueue;

        [theQueue release];

    }

}

- (void)dealloc {

    [cryptoQueue release];

    [navController release];

    [window release];

    [super dealloc];

}

@end