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/*
* Copyright 2014 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#import "ARDSignalingMessage.h"
#import "sdk/objc/base/RTCLogging.h"
#import "ARDUtilities.h"
#import "RTCIceCandidate+JSON.h"
#import "RTCSessionDescription+JSON.h"
static NSString * const kARDSignalingMessageTypeKey = @"type";
static NSString * const kARDTypeValueRemoveCandidates = @"remove-candidates";
@implementation ARDSignalingMessage
@synthesize type = _type;
- (instancetype)initWithType:(ARDSignalingMessageType)type {
self = [super init];
if (self) {
_type = type;
}
return self;
}
- (NSString *)description {
return [[NSString alloc] initWithData:[self JSONData]
encoding:NSUTF8StringEncoding];
}
+ (ARDSignalingMessage *)messageFromJSONString:(NSString *)jsonString {
NSDictionary *values = [NSDictionary dictionaryWithJSONString:jsonString];
if (!values) {
RTCLogError(@"Error parsing signaling message JSON.");
return nil;
}
NSString *typeString = values[kARDSignalingMessageTypeKey];
ARDSignalingMessage *message = nil;
if ([typeString isEqualToString:@"candidate"]) {
RTC_OBJC_TYPE(RTCIceCandidate) *candidate =
[RTC_OBJC_TYPE(RTCIceCandidate) candidateFromJSONDictionary:values];
message = [[ARDICECandidateMessage alloc] initWithCandidate:candidate];
} else if ([typeString isEqualToString:kARDTypeValueRemoveCandidates]) {
RTCLogInfo(@"Received remove-candidates message");
NSArray<RTC_OBJC_TYPE(RTCIceCandidate) *> *candidates =
[RTC_OBJC_TYPE(RTCIceCandidate) candidatesFromJSONDictionary:values];
message = [[ARDICECandidateRemovalMessage alloc]
initWithRemovedCandidates:candidates];
} else if ([typeString isEqualToString:@"offer"] ||
[typeString isEqualToString:@"answer"]) {
RTC_OBJC_TYPE(RTCSessionDescription) *description =
[RTC_OBJC_TYPE(RTCSessionDescription) descriptionFromJSONDictionary:values];
message =
[[ARDSessionDescriptionMessage alloc] initWithDescription:description];
} else if ([typeString isEqualToString:@"bye"]) {
message = [[ARDByeMessage alloc] init];
} else {
RTCLogError(@"Unexpected type: %@", typeString);
}
return message;
}
- (NSData *)JSONData {
return nil;
}
@end
@implementation ARDICECandidateMessage
@synthesize candidate = _candidate;
- (instancetype)initWithCandidate:(RTC_OBJC_TYPE(RTCIceCandidate) *)candidate {
self = [super initWithType:kARDSignalingMessageTypeCandidate];
if (self) {
_candidate = candidate;
}
return self;
}
- (NSData *)JSONData {
return [_candidate JSONData];
}
@end
@implementation ARDICECandidateRemovalMessage
@synthesize candidates = _candidates;
- (instancetype)initWithRemovedCandidates:(NSArray<RTC_OBJC_TYPE(RTCIceCandidate) *> *)candidates {
NSParameterAssert(candidates.count);
self = [super initWithType:kARDSignalingMessageTypeCandidateRemoval];
if (self) {
_candidates = candidates;
}
return self;
}
- (NSData *)JSONData {
return [RTC_OBJC_TYPE(RTCIceCandidate) JSONDataForIceCandidates:_candidates
withType:kARDTypeValueRemoveCandidates];
}
@end
@implementation ARDSessionDescriptionMessage
@synthesize sessionDescription = _sessionDescription;
- (instancetype)initWithDescription:(RTC_OBJC_TYPE(RTCSessionDescription) *)description {
ARDSignalingMessageType messageType = kARDSignalingMessageTypeOffer;
RTCSdpType sdpType = description.type;
switch (sdpType) {
case RTCSdpTypeOffer:
messageType = kARDSignalingMessageTypeOffer;
break;
case RTCSdpTypeAnswer:
messageType = kARDSignalingMessageTypeAnswer;
break;
case RTCSdpTypePrAnswer:
case RTCSdpTypeRollback:
NSAssert(
NO, @"Unexpected type: %@", [RTC_OBJC_TYPE(RTCSessionDescription) stringForType:sdpType]);
break;
}
self = [super initWithType:messageType];
if (self) {
_sessionDescription = description;
}
return self;
}
- (NSData *)JSONData {
return [_sessionDescription JSONData];
}
@end
@implementation ARDByeMessage
- (instancetype)init {
return [super initWithType:kARDSignalingMessageTypeBye];
}
- (NSData *)JSONData {
NSDictionary *message = @{
@"type": @"bye"
};
return [NSJSONSerialization dataWithJSONObject:message
options:NSJSONWritingPrettyPrinted
error:NULL];
}
@end