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1 /* | |
2 * libjingle | |
3 * Copyright 2014 Google Inc. | |
4 * | |
5 * Redistribution and use in source and binary forms, with or without | |
6 * modification, are permitted provided that the following conditions are met: | |
7 * | |
8 * 1. Redistributions of source code must retain the above copyright notice, | |
9 * this list of conditions and the following disclaimer. | |
10 * 2. Redistributions in binary form must reproduce the above copyright notice, | |
11 * this list of conditions and the following disclaimer in the documentation | |
12 * and/or other materials provided with the distribution. | |
13 * 3. The name of the author may not be used to endorse or promote products | |
14 * derived from this software without specific prior written permission. | |
15 * | |
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | |
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
26 */ | |
27 | |
28 #import "ARDSignalingMessage.h" | |
29 | |
30 #import "RTCLogging.h" | |
31 | |
32 #import "ARDUtilities.h" | |
33 #import "RTCICECandidate+JSON.h" | |
34 #import "RTCSessionDescription+JSON.h" | |
35 | |
36 static NSString const *kARDSignalingMessageTypeKey = @"type"; | |
37 | |
38 @implementation ARDSignalingMessage | |
39 | |
40 @synthesize type = _type; | |
41 | |
42 - (instancetype)initWithType:(ARDSignalingMessageType)type { | |
43 if (self = [super init]) { | |
44 _type = type; | |
45 } | |
46 return self; | |
47 } | |
48 | |
49 - (NSString *)description { | |
50 return [[NSString alloc] initWithData:[self JSONData] | |
51 encoding:NSUTF8StringEncoding]; | |
52 } | |
53 | |
54 + (ARDSignalingMessage *)messageFromJSONString:(NSString *)jsonString { | |
55 NSDictionary *values = [NSDictionary dictionaryWithJSONString:jsonString]; | |
56 if (!values) { | |
57 RTCLogError(@"Error parsing signaling message JSON."); | |
58 return nil; | |
59 } | |
60 | |
61 NSString *typeString = values[kARDSignalingMessageTypeKey]; | |
62 ARDSignalingMessage *message = nil; | |
63 if ([typeString isEqualToString:@"candidate"]) { | |
64 RTCICECandidate *candidate = | |
65 [RTCICECandidate candidateFromJSONDictionary:values]; | |
66 message = [[ARDICECandidateMessage alloc] initWithCandidate:candidate]; | |
67 } else if ([typeString isEqualToString:@"offer"] || | |
68 [typeString isEqualToString:@"answer"]) { | |
69 RTCSessionDescription *description = | |
70 [RTCSessionDescription descriptionFromJSONDictionary:values]; | |
71 message = | |
72 [[ARDSessionDescriptionMessage alloc] initWithDescription:description]; | |
73 } else if ([typeString isEqualToString:@"bye"]) { | |
74 message = [[ARDByeMessage alloc] init]; | |
75 } else { | |
76 RTCLogError(@"Unexpected type: %@", typeString); | |
77 } | |
78 return message; | |
79 } | |
80 | |
81 - (NSData *)JSONData { | |
82 return nil; | |
83 } | |
84 | |
85 @end | |
86 | |
87 @implementation ARDICECandidateMessage | |
88 | |
89 @synthesize candidate = _candidate; | |
90 | |
91 - (instancetype)initWithCandidate:(RTCICECandidate *)candidate { | |
92 if (self = [super initWithType:kARDSignalingMessageTypeCandidate]) { | |
93 _candidate = candidate; | |
94 } | |
95 return self; | |
96 } | |
97 | |
98 - (NSData *)JSONData { | |
99 return [_candidate JSONData]; | |
100 } | |
101 | |
102 @end | |
103 | |
104 @implementation ARDSessionDescriptionMessage | |
105 | |
106 @synthesize sessionDescription = _sessionDescription; | |
107 | |
108 - (instancetype)initWithDescription:(RTCSessionDescription *)description { | |
109 ARDSignalingMessageType type = kARDSignalingMessageTypeOffer; | |
110 NSString *typeString = description.type; | |
111 if ([typeString isEqualToString:@"offer"]) { | |
112 type = kARDSignalingMessageTypeOffer; | |
113 } else if ([typeString isEqualToString:@"answer"]) { | |
114 type = kARDSignalingMessageTypeAnswer; | |
115 } else { | |
116 NSAssert(NO, @"Unexpected type: %@", typeString); | |
117 } | |
118 if (self = [super initWithType:type]) { | |
119 _sessionDescription = description; | |
120 } | |
121 return self; | |
122 } | |
123 | |
124 - (NSData *)JSONData { | |
125 return [_sessionDescription JSONData]; | |
126 } | |
127 | |
128 @end | |
129 | |
130 @implementation ARDByeMessage | |
131 | |
132 - (instancetype)init { | |
133 return [super initWithType:kARDSignalingMessageTypeBye]; | |
134 } | |
135 | |
136 - (NSData *)JSONData { | |
137 NSDictionary *message = @{ | |
138 @"type": @"bye" | |
139 }; | |
140 return [NSJSONSerialization dataWithJSONObject:message | |
141 options:NSJSONWritingPrettyPrinted | |
142 error:NULL]; | |
143 } | |
144 | |
145 @end | |
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