iOS native EventSource channel for demo.openwebrtc.io

SimpleNativeDemoViewController.m

//
//  OWRDemoViewController.m
//  OWRDemo
//
//  Copyright (c) 2014, Ericsson AB.
//  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.

//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT HOLDER OR 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 "SimpleNativeDemoViewController.h"
#import "TRVSEventSource.h" // From https://github.com/travisjeffery/TRVSEventSource
#include <owr.h>

#define kEventSourceURL @"http://localhost:8080/stoc/%d/%@"

@interface SimpleNativeDemoViewController () <TRVSEventSourceDelegate>
{
    IBOutlet UISlider *roomSlider;
    IBOutlet UILabel *roomLabel;
    IBOutlet UIBarButtonItem *joinButton;
    IBOutlet UIBarButtonItem *callButton;
    IBOutlet UIBarButtonItem *hangupButton;

    // Video containers.
    IBOutlet UIImageView *selfView;
    IBOutlet UIImageView *remoteView;
}

@property (nonatomic, strong) TRVSEventSource *eventSource;

@end

@implementation OWRDemoViewController

- (void)viewDidLoad
{
    //owr_init();

    [self.navigationController setToolbarHidden:NO animated:NO];

    callButton.enabled = NO;
    hangupButton.enabled = NO;

    // TODO: Send selfView and remoteView ref to OpenWebRTC.

    [super viewDidLoad];
}

- (IBAction)joinButtonTapped:(id)sender
{
    float room = [roomSlider value];
    [self joinRoomWithNumber:room];
}

- (IBAction)callButtonTapped:(id)sender
{

}

- (IBAction)hangupButtonTapped:(id)sender
{
    
}

- (IBAction)sliderValueChanged:(UISlider *)sender
{
    int sliderValue = (int)sender.value;
    roomLabel.text = [NSString stringWithFormat:@"%d", sliderValue];
}

- (void)joinRoomWithNumber:(int)nr
{
    NSString *deviceID = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
    NSString *eventSourceURL = [NSString stringWithFormat:kEventSourceURL, nr, deviceID, nil];

    TRVSEventSource *eventSource = [[TRVSEventSource alloc] initWithURL:[NSURL URLWithString:eventSourceURL]];
    NSLog(@"Connecting to server at: %@", eventSourceURL);

    /**
     * Join a room.
     */
    [eventSource addListenerForEvent:@"join" usingEventHandler:^(TRVSServerSentEvent *event, NSError *error) {
        //NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:event.data options:0 error:NULL];

        NSString *data = [NSString stringWithUTF8String:[event.data bytes]];
        NSLog(@"Received JOIN with data: %@", data);

        if (!error) {
            joinButton.enabled = NO;
            callButton.enabled = YES;
        }

        NSString *peerUserID = [NSString stringWithFormat:@"user-%@", data];
        [self performSelector:@selector(joinEventSourceChannelWithPeerID:) withObject:peerUserID];
    }];

    /**
     * Peer leaves room.
     */
    [eventSource addListenerForEvent:@"leave" usingEventHandler:^(TRVSServerSentEvent *event, NSError *error) {
        //NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:event.data options:0 error:NULL];

        // TODO: owr close.

        NSString *data = [NSString stringWithUTF8String:[event.data bytes]];
        NSLog(@"Received LEAVE with data: %@", data);

        callButton.enabled = NO;
        hangupButton.enabled = NO;

        NSString *peerUserID = [NSString stringWithFormat:@"user-%@", data];
        [self performSelector:@selector(removeEventSourceListenerWithName:) withObject:peerUserID];
    }];

    /**
     * Room is full.
     */
    [eventSource addListenerForEvent:@"sessionfull" usingEventHandler:^(TRVSServerSentEvent *event, NSError *error) {
        //NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:event.data options:0 error:NULL];
        NSString *data = [NSString stringWithUTF8String:[event.data bytes]];
        NSLog(@"Received SESSIONFULL with data: %@", data);

        joinButton.enabled = YES;
        callButton.enabled = NO;
        hangupButton.enabled = NO;

        NSLog(@"Tell user to choose another room, this one is full");

        NSString *peerUserID = [NSString stringWithFormat:@"user-%@", data];
        [self performSelector:@selector(joinEventSourceChannelWithPeerID:) withObject:peerUserID];
    }];

    joinButton.enabled = NO;

    self.eventSource = eventSource;
    [self.eventSource setDelegate:self];
    [self.eventSource open];
}

- (void)removeEventSourceListenerWithName:(NSString *)eventName
{
    NSLog(@"Removing listener for: %@", eventName);
    [self.eventSource removeAllListenersForEvent:eventName];
}

- (void)joinEventSourceChannelWithPeerID:(NSString *)peerID
{
    [self.eventSource addListenerForEvent:peerID usingEventHandler:^(TRVSServerSentEvent *event, NSError *error) {
        //NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:event.data options:0 error:NULL];
        NSString *data = [NSString stringWithUTF8String:[event.data bytes]];
        NSLog(@"Received DATA frome peer: %@", data);

        NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:event.data options:0 error:NULL];
        NSLog(@"JSON:\n%@", JSON);
        if ([@"OFFER" isEqualToString:JSON[@"messageType"]]) {
            NSLog(@"OFFER received");

        }
    }];
}

- (void)didReceiveMemoryWarning
{
    NSLog(@"WARNING! didReceiveMemoryWarning");
    [super didReceiveMemoryWarning];
}

#pragma mark - TRVSEventSourceDelegate methods

- (void)eventSourceDidOpen:(TRVSEventSource *)eventSource
{
    callButton.enabled = YES;
}

- (void)eventSource:(TRVSEventSource *)eventSource didFailWithError:(NSError *)error
{
    NSLog(@"An error occurred: %@", error);

    callButton.enabled = NO;
    joinButton.enabled = YES;
}

@end