/*

     File: SettingsViewController.m

 Abstract: 

    This view controller is used to manage a modal view that enables users to set a chat room name (aka Multipeer Connectivity 'serviceType' and a display name.  It also shows users how to use exception handling to detect invalid arguments passed to the framework API

  Version: 1.0

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 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

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 FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND

 OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.

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 */

@import MultipeerConnectivity;

#import "SettingsViewController.h"

static NSUInteger const MCNearbyServiceMaxServiceTypeLength = 15;

@interface SettingsViewController () <UITextFieldDelegate>

@property (retain, nonatomic) IBOutlet UITextField *displayNameTextField;

@property (retain, nonatomic) IBOutlet UITextField *serviceTypeTextField;

@end

@implementation SettingsViewController

- (void)viewDidLoad

{

    self.displayNameTextField.text = self.displayName;

    self.serviceTypeTextField.text = self.serviceType;

}

#pragma mark - private 

// RFC 6335 text:

//   5.1. Service Name Syntax

//

//     Valid service names are hereby normatively defined as follows:

//

//     o  MUST be at least 1 character and no more than 15 characters long

//     o  MUST contain only US-ASCII [ANSI.X3.4-1986] letters 'A' - 'Z' and

//        'a' - 'z', digits '0' - '9', and hyphens ('-', ASCII 0x2D or

//        decimal 45)

//     o  MUST contain at least one letter ('A' - 'Z' or 'a' - 'z')

//     o  MUST NOT begin or end with a hyphen

//     o  hyphens MUST NOT be adjacent to other hyphens

//

- (BOOL)isDisplayNameAndServiceTypeValid

{

    MCPeerID *peerID;

    @try {

        peerID = [[MCPeerID alloc] initWithDisplayName:self.displayNameTextField.text];

    }

    @catch (NSException *exception) {

        NSLog(@"Invalid display name [%@]", self.displayNameTextField.text);

        return NO;

    }

    // Check if using this service type string causes a framework exception

    MCNearbyServiceAdvertiser *advertiser;

    @try {

        advertiser = [[MCNearbyServiceAdvertiser alloc] initWithPeer:peerID discoveryInfo:nil serviceType:self.serviceTypeTextField.text];

    }

    @catch (NSException *exception) {

        NSLog(@"Invalid service type [%@]", self.serviceTypeTextField.text);

        return NO;

    }

    NSLog(@"Room Name [%@] (aka service type) and display name [%@] are valid", advertiser.serviceType, peerID.displayName);

    // all exception checks passed

    return YES;

}

#pragma mark - IBAction methods

- (IBAction)doneTapped:(id)sender

{

    if ([self isDisplayNameAndServiceTypeValid]) {

        // Fields are set.  send the values back to the delegate

        [self.delegate controller:self didCreateChatRoomWithDisplayName:self.displayNameTextField.text serviceType:self.serviceTypeTextField.text];

    }

    else {

        // These are mandatory fields.  Alert the user

        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"You must set a valid room name and your display name" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];

        [alert show];

    }

}

#pragma mark - UITextFieldDelegate methods

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

    [self.view endEditing:YES];

    return YES;

}

- (void)textFieldDidEndEditing:(UITextField *)textField

{

    [self.view endEditing:YES];

}

@end