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1 /* | |
2 * Copyright 2014 The WebRTC Project Authors. All rights reserved. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license | |
5 * that can be found in the LICENSE file in the root of the source | |
6 * tree. An additional intellectual property rights grant can be found | |
7 * in the file PATENTS. All contributing project authors may | |
8 * be found in the AUTHORS file in the root of the source tree. | |
9 */ | |
10 | |
11 #import "ARDSignalingMessage.h" | |
12 | |
13 #import "WebRTC/RTCLogging.h" | |
14 | |
15 #import "ARDUtilities.h" | |
16 #import "RTCIceCandidate+JSON.h" | |
17 #import "RTCSessionDescription+JSON.h" | |
18 | |
19 static NSString * const kARDSignalingMessageTypeKey = @"type"; | |
20 static NSString * const kARDTypeValueRemoveCandidates = @"remove-candidates"; | |
21 | |
22 @implementation ARDSignalingMessage | |
23 | |
24 @synthesize type = _type; | |
25 | |
26 - (instancetype)initWithType:(ARDSignalingMessageType)type { | |
27 if (self = [super init]) { | |
28 _type = type; | |
29 } | |
30 return self; | |
31 } | |
32 | |
33 - (NSString *)description { | |
34 return [[NSString alloc] initWithData:[self JSONData] | |
35 encoding:NSUTF8StringEncoding]; | |
36 } | |
37 | |
38 + (ARDSignalingMessage *)messageFromJSONString:(NSString *)jsonString { | |
39 NSDictionary *values = [NSDictionary dictionaryWithJSONString:jsonString]; | |
40 if (!values) { | |
41 RTCLogError(@"Error parsing signaling message JSON."); | |
42 return nil; | |
43 } | |
44 | |
45 NSString *typeString = values[kARDSignalingMessageTypeKey]; | |
46 ARDSignalingMessage *message = nil; | |
47 if ([typeString isEqualToString:@"candidate"]) { | |
48 RTCIceCandidate *candidate = | |
49 [RTCIceCandidate candidateFromJSONDictionary:values]; | |
50 message = [[ARDICECandidateMessage alloc] initWithCandidate:candidate]; | |
51 } else if ([typeString isEqualToString:kARDTypeValueRemoveCandidates]) { | |
52 RTCLogInfo(@"Received remove-candidates message"); | |
53 NSArray<RTCIceCandidate *> *candidates = | |
54 [RTCIceCandidate candidatesFromJSONDictionary:values]; | |
55 message = [[ARDICECandidateRemovalMessage alloc] | |
56 initWithRemovedCandidates:candidates]; | |
57 } else if ([typeString isEqualToString:@"offer"] || | |
58 [typeString isEqualToString:@"answer"]) { | |
59 RTCSessionDescription *description = | |
60 [RTCSessionDescription descriptionFromJSONDictionary:values]; | |
61 message = | |
62 [[ARDSessionDescriptionMessage alloc] initWithDescription:description]; | |
63 } else if ([typeString isEqualToString:@"bye"]) { | |
64 message = [[ARDByeMessage alloc] init]; | |
65 } else { | |
66 RTCLogError(@"Unexpected type: %@", typeString); | |
67 } | |
68 return message; | |
69 } | |
70 | |
71 - (NSData *)JSONData { | |
72 return nil; | |
73 } | |
74 | |
75 @end | |
76 | |
77 @implementation ARDICECandidateMessage | |
78 | |
79 @synthesize candidate = _candidate; | |
80 | |
81 - (instancetype)initWithCandidate:(RTCIceCandidate *)candidate { | |
82 if (self = [super initWithType:kARDSignalingMessageTypeCandidate]) { | |
83 _candidate = candidate; | |
84 } | |
85 return self; | |
86 } | |
87 | |
88 - (NSData *)JSONData { | |
89 return [_candidate JSONData]; | |
90 } | |
91 | |
92 @end | |
93 | |
94 @implementation ARDICECandidateRemovalMessage | |
95 | |
96 @synthesize candidates = _candidates; | |
97 | |
98 - (instancetype)initWithRemovedCandidates:( | |
99 NSArray<RTCIceCandidate *> *)candidates { | |
100 NSParameterAssert(candidates.count); | |
101 if (self = [super initWithType:kARDSignalingMessageTypeCandidateRemoval]) { | |
102 _candidates = candidates; | |
103 } | |
104 return self; | |
105 } | |
106 | |
107 - (NSData *)JSONData { | |
108 return | |
109 [RTCIceCandidate JSONDataForIceCandidates:_candidates | |
110 withType:kARDTypeValueRemoveCandidates]; | |
111 } | |
112 | |
113 @end | |
114 | |
115 @implementation ARDSessionDescriptionMessage | |
116 | |
117 @synthesize sessionDescription = _sessionDescription; | |
118 | |
119 - (instancetype)initWithDescription:(RTCSessionDescription *)description { | |
120 ARDSignalingMessageType messageType = kARDSignalingMessageTypeOffer; | |
121 RTCSdpType sdpType = description.type; | |
122 switch (sdpType) { | |
123 case RTCSdpTypeOffer: | |
124 messageType = kARDSignalingMessageTypeOffer; | |
125 break; | |
126 case RTCSdpTypeAnswer: | |
127 messageType = kARDSignalingMessageTypeAnswer; | |
128 break; | |
129 case RTCSdpTypePrAnswer: | |
130 NSAssert(NO, @"Unexpected type: %@", | |
131 [RTCSessionDescription stringForType:sdpType]); | |
132 break; | |
133 } | |
134 if (self = [super initWithType:messageType]) { | |
135 _sessionDescription = description; | |
136 } | |
137 return self; | |
138 } | |
139 | |
140 - (NSData *)JSONData { | |
141 return [_sessionDescription JSONData]; | |
142 } | |
143 | |
144 @end | |
145 | |
146 @implementation ARDByeMessage | |
147 | |
148 - (instancetype)init { | |
149 return [super initWithType:kARDSignalingMessageTypeBye]; | |
150 } | |
151 | |
152 - (NSData *)JSONData { | |
153 NSDictionary *message = @{ | |
154 @"type": @"bye" | |
155 }; | |
156 return [NSJSONSerialization dataWithJSONObject:message | |
157 options:NSJSONWritingPrettyPrinted | |
158 error:NULL]; | |
159 } | |
160 | |
161 @end | |
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