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// SDLProtocolReceivedMessageRouter.m
//
// This class gets handed the SDLProtocol messages as they are received and decides what happens to them and where they are sent on to.
#import "SDLProtocolReceivedMessageRouter.h"
#import "SDLDebugTool.h"
#import "SDLProtocolMessage.h"
#import "SDLProtocolMessageAssembler.h"
@interface SDLProtocolReceivedMessageRouter ()
@property (assign) BOOL alreadyDestructed;
@property (strong) NSMutableDictionary *messageAssemblers;
@end
@implementation SDLProtocolReceivedMessageRouter
- (instancetype)init {
if (self = [super init]) {
_alreadyDestructed = NO;
self.messageAssemblers = [NSMutableDictionary dictionaryWithCapacity:2];
}
return self;
}
- (void)handleReceivedMessage:(SDLProtocolMessage *)message {
SDLFrameType frameType = message.header.frameType;
switch (frameType) {
case SDLFrameType_Single: {
[self sdl_dispatchProtocolMessage:message];
} break;
case SDLFrameType_Control: {
[self sdl_dispatchControlMessage:message];
} break;
case SDLFrameType_First: // fallthrough
case SDLFrameType_Consecutive: {
[self sdl_dispatchMultiPartMessage:message];
} break;
default: break;
}
}
- (void)sdl_dispatchProtocolMessage:(SDLProtocolMessage *)message {
if ([self.delegate respondsToSelector:@selector(onProtocolMessageReceived:)]) {
[self.delegate onProtocolMessageReceived:message];
}
}
- (void)sdl_dispatchControlMessage:(SDLProtocolMessage *)message {
// VERSION DEPENDENT CODE
switch (message.header.version) {
case 1: // fallthrough
case 2: // fallthrough
case 3: // fallthrough
case 4: {
[self sdl_dispatchV1ControlMessage:message];
} break;
case 5: {
// TODO: New delegates
[self sdl_dispatchV5ControlMessage:message];
} break;
}
}
- (void)sdl_dispatchV1ControlMessage:(SDLProtocolMessage *)message {
switch (message.header.frameData) {
case SDLFrameData_StartSessionACK: {
if ([self.delegate respondsToSelector:@selector(handleProtocolStartServiceACKMessage:)]) {
[self.delegate handleProtocolStartServiceACKMessage:message];
}
} break;
case SDLFrameData_StartSessionNACK: {
if ([self.delegate respondsToSelector:@selector(handleProtocolStartServiceNAKMessage:)]) {
[self.delegate handleProtocolStartServiceNAKMessage:message];
}
} break;
case SDLFrameData_EndSessionACK: {
if ([self.delegate respondsToSelector:@selector(handleProtocolEndServiceACKMessage:)]) {
[self.delegate handleProtocolEndServiceACKMessage:message];
}
} break;
case SDLFrameData_EndSessionNACK: {
if ([self.delegate respondsToSelector:@selector(handleProtocolStartServiceNAKMessage:)]) {
[self.delegate handleProtocolEndServiceNAKMessage:message];
}
} break;
case SDLFrameData_Heartbeat: {
if ([self.delegate respondsToSelector:@selector(handleHeartbeatForSession:)]) {
[self.delegate handleHeartbeatForSession:message.header.sessionID];
}
} break;
case SDLFrameData_HeartbeatACK: {
if ([self.delegate respondsToSelector:@selector(handleHeartbeatACK)]) {
[self.delegate handleHeartbeatACK];
}
} break;
default: break; // Other frame data is possible, but we don't care about them
}
}
- (void)sdl_dispatchV5ControlMessage:(SDLProtocolMessage *)message {
// TODO
}
- (void)sdl_dispatchMultiPartMessage:(SDLProtocolMessage *)message {
// Pass multipart messages to an assembler and call delegate when done.
NSNumber *sessionID = [NSNumber numberWithUnsignedChar:message.header.sessionID];
SDLProtocolMessageAssembler *assembler = self.messageAssemblers[sessionID];
if (assembler == nil) {
assembler = [[SDLProtocolMessageAssembler alloc] initWithSessionID:message.header.sessionID];
self.messageAssemblers[sessionID] = assembler;
}
SDLMessageAssemblyCompletionHandler completionHandler = ^void(BOOL done, SDLProtocolMessage *assembledMessage) {
if (done) {
[self sdl_dispatchProtocolMessage:assembledMessage];
}
};
[assembler handleMessage:message withCompletionHandler:completionHandler];
}
#pragma mark - Lifecycle
- (void)sdl_destructObjects {
if (!self.alreadyDestructed) {
self.alreadyDestructed = YES;
self.delegate = nil;
}
}
- (void)sdl_dispose {
[self sdl_destructObjects];
}
- (void)dealloc {
[self sdl_destructObjects];
}
@end
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