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#import <FPWCSApi2/FPWCSApi2.h>

- (void)connect {
    FPWCSApi2RoomManagerOptions *options = [[FPWCSApi2RoomManagerOptions alloc] init];
    options.urlServer = _connectUrl.text;
    options.username = _connectLogin.input.text;
    NSError *error;
    roomManager = [FPWCSApi2 createRoomManager:options error:&error];
if (!roomManager) {
UIAlertController * alert = [UIAlertController
alertControllerWithTitle:@"Failed to connect"
message:error.localizedDescription
preferredStyle:UIAlertControllerStyleAlert];

UIAlertAction* okButton = [UIAlertAction
actionWithTitle:@"Ok"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action) {
[self onDisconnected];
}];

[alert addAction:okButton];
[self presentViewController:alert animated:YES completion:nil];
}

[roomManager on:kFPWCSRoomManagerEventConnected callback:^(FPWCSApi2RoomManager *rManager){
[self changeConnectionStatus:kFPWCSRoomManagerEventConnected];
[self onConnected:rManager];
}];

[roomManager on:kFPWCSRoomManagerEventFailed callback:^(FPWCSApi2RoomManager *rManager){
[self changeConnectionStatus:kFPWCSRoomManagerEventDisconnected];
[self onUnpublished];
[self onLeaved];
[self onDisconnected];
}];

[roomManager on:kFPWCSRoomManagerEventDisconnected callback:^(FPWCSApi2RoomManager *rManager){
[self changeConnectionStatus:kFPWCSRoomManagerEventDisconnected];
[self onUnpublished];
[self onLeaved];
[self onDisconnected];
}];
} ...
}

FPWCSApi2RoomOptions * options = [[FPWCSApi2RoomOptions alloc] init];
options.name = _joinRoomName.input.text;
room = [roomManager join:options];

[room onStateCallback:^(FPWCSApi2Room *room) {
    NSDictionary *participants = [room getParticipants];
    if ([participants count] >= 3) {
        [room leave:nil];
        _joinStatus.text = @"Room is full";
        [self changeViewState:_joinButton enabled:YES];
        return;
                
    }
    NSString *chatState = @"participants: ";
    for (NSString* key in participants) {
        FPWCSApi2RoomParticipant *participant = [participants valueForKey:key];
        ParticipantView *pv = [freeViews pop];
        [busyViews setValue:pv forKey:[participant getName]];
        [participant play:pv.display];
        pv.login.text = [participant getName];
        chatState = [NSString stringWithFormat:@"%@%@, ", chatState, [participant getName]];
}
_joinStatus.text = @"JOINED";
[self changeViewState:_joinButton enabled:YES];
[_joinButton setTitle:@"LEAVE" forState:UIControlStateNormal];
[self changeViewState:_publishButton enabled:YES];
[self changeViewState:_sendButton enabled:YES];
if ([participants count] == 0) {
_messageHistory.text = [NSString stringWithFormat:@"%@\n%@ - %@", _messageHistory.text, @"chat", @"room is empty"];
} else {
_messageHistory.text = [NSString stringWithFormat:@"%@\n%@ - %@", _messageHistory.text, @"chat", [chatState substringToIndex:MAX((int)[chatState length]-2, 0)]];
}
} }
    ...
}];

- (void)publishButton:(UIButton *)button {
    [self changeViewState:button enabled:NO];
    if ([button.titleLabel.text isEqualToString:@"STOP"]) {
        [room unpublish];
    } else {
publishStream = [room publish:_localDisplay];
[publishStream on:kFPWCSStreamStatusPublishing callback:^(FPWCSApi2Stream *rStream){
[self changeViewState:_publishButton enabled:YES];
[self changeLocalStatus:rStream];
[_publishButton setTitle:@"STOP" forState:UIControlStateNormal];
[self changeViewState:_muteAudio enabled:YES];
[self changeViewState:_muteVideo enabled:YES];
}];

[publishStream on:kFPWCSStreamStatusUnpublished callback:^(FPWCSApi2Stream *rStream){
[self onUnpublished];
[self changeLocalStatus:rStream];
}];

[publishStream on:kFPWCSStreamStatusFailed callback:^(FPWCSApi2Stream *rStream){
[self onUnpublished];
[self changeLocalStatus:rStream];

}];

 publishStream = [room publish:_localDisplay];
        ...
    }
}

[room on:kFPWCSRoomParticipantEventJoined participantCallback:^(FPWCSApi2Room *room, FPWCSApi2RoomParticipant *participant) {
    ParticipantView *pv = [freeViews pop];
    if (pv) {
        pv.login.text = [participant getName];
        _messageHistory.text = [NSString stringWithFormat:@"%@\n%@ - %@", _messageHistory.text, participant.getName, @"joined"];
        [busyViews setValue:pv forKey:[participant getName]];
    }
}];

FPWCSApi2Room kFPWCSRoomParticipantEventPublished participantCallback, FPWCSApi2RoomParticipant play код

[room on:kFPWCSRoomParticipantEventPublished participantCallback:^(FPWCSApi2Room *room, FPWCSApi2RoomParticipant *participant) {
    ParticipantView *pv = [busyViews valueForKey:[participant getName]];
    if (pv) {
        [participant play:pv.display];
    }
}];

[room onMessageCallback:^(FPWCSApi2Room *room, FPWCSApi2RoomMessage *message) {
    _messageHistory.text = [NSString stringWithFormat:@"%@\n%@ - %@", _messageHistory.text, message.from, message.text];
}];

- (void)sendButton:(UIButton *)button {
    for (NSString *name in [room getParticipants]) {
        FPWCSApi2RoomParticipant *participant = [room getParticipants][name];
        [participant sendMessage:_messageBody.text];
    }
    _messageHistory.text = [NSString stringWithFormat:@"%@\n%@ - %@", _messageHistory.text, _connectLogin.input.text, _messageBody.text];
    _messageBody.text = @"";
}

- (void)muteAudioChanged:(id)sender {
    if (publishStream) {
        if (_muteAudio.control.isOn) {
            [publishStream muteAudio];
        } else {
            [publishStream unmuteAudio];
        }
    }
}

- (void)muteVideoChanged:(id)sender {
    if (publishStream) {
        if (_muteVideo.control.isOn) {
            [publishStream muteVideo];
        } else {
            [publishStream unmuteVideo];
        }
    }
}

if ([button.titleLabel.text isEqualToString:@"LEAVE"]) {
    if (room) {
        FPWCSApi2DataHandler *handler = [[FPWCSApi2DataHandler alloc] init];
        handler.onAccepted = ^(FPWCSApi2Session *session, FPWCSApi2Data *data){
            [self onUnpublished];
            [self onLeaved];
        };
        handler.onRejected = ^(FPWCSApi2Session *session, FPWCSApi2Data *data){
            [self onUnpublished];
            [self onLeaved];
        };
        [room leave:handler];
        room = nil;
    }
}

- (void)connectButton:(UIButton *)button {
    [self changeViewState:button enabled:NO];
    if ([button.titleLabel.text isEqualToString:@"DISCONNECT"]) {
        if (roomManager) {
            [roomManager disconnect];
        }
}  else {
//todo check url is not empty
[self changeViewState:_connectUrl enabled:NO];
[self changeViewState:_connectLogin.input enabled:NO];
[self connect];
}
}...
    }
}