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//
// SDLResponseDispatcher.m
// SmartDeviceLink-iOS
//
// Created by Joel Fischer on 7/8/16.
// Copyright © 2016 smartdevicelink. All rights reserved.
//
#import "SDLResponseDispatcher.h"
#import "NSMutableDictionary+SafeRemove.h"
#import "SDLAddCommand.h"
#import "SDLAlert.h"
#import "SDLButtonName.h"
#import "SDLDeleteCommand.h"
#import "SDLDeleteCommandResponse.h"
#import "SDLError.h"
#import "SDLOnButtonEvent.h"
#import "SDLOnButtonPress.h"
#import "SDLOnCommand.h"
#import "SDLRPCResponse.h"
#import "SDLResult.h"
#import "SDLScrollableMessage.h"
#import "SDLShow.h"
#import "SDLSoftButton.h"
#import "SDLSubscribeButton.h"
#import "SDLUnsubscribeButton.h"
#import "SDLUnsubscribeButtonResponse.h"
NS_ASSUME_NONNULL_BEGIN
@implementation SDLResponseDispatcher
- (instancetype)init {
return [self initWithNotificationDispatcher:nil];
}
- (instancetype)initWithNotificationDispatcher:(nullable id)dispatcher {
self = [super init];
if (!self) {
return nil;
}
_rpcResponseHandlerMap = [NSMapTable mapTableWithKeyOptions:NSMapTableCopyIn valueOptions:NSMapTableCopyIn];
_rpcRequestDictionary = [NSMutableDictionary dictionary];
_commandHandlerMap = [NSMapTable mapTableWithKeyOptions:NSMapTableCopyIn valueOptions:NSMapTableCopyIn];
_buttonHandlerMap = [NSMapTable mapTableWithKeyOptions:NSMapTableCopyIn valueOptions:NSMapTableCopyIn];
_customButtonHandlerMap = [NSMapTable mapTableWithKeyOptions:NSMapTableCopyIn valueOptions:NSMapTableCopyIn];
// Responses
for (SDLNotificationName responseName in [SDLNotificationConstants allResponseNames]) {
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sdl_runHandlersForResponse:) name:responseName object:dispatcher];
}
// Buttons
for (SDLNotificationName buttonNotificationName in [SDLNotificationConstants allButtonEventNotifications]) {
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sdl_runHandlerForButton:) name:buttonNotificationName object:dispatcher];
}
// Commands
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sdl_runHandlerForCommand:) name:SDLDidReceiveCommandNotification object:dispatcher];
return self;
}
#pragma mark - Storage
- (void)storeRequest:(SDLRPCRequest *)request handler:(nullable SDLResponseHandler)handler {
NSNumber *correlationId = request.correlationID;
// Check for RPCs that require an extra handler
if ([request isKindOfClass:[SDLAddCommand class]]) {
SDLAddCommand *addCommand = (SDLAddCommand *)request;
if (!addCommand.cmdID) {
@throw [NSException sdl_missingIdException];
}
if (addCommand.handler) {
self.commandHandlerMap[addCommand.cmdID] = addCommand.handler;
}
} else if ([request isKindOfClass:[SDLSubscribeButton class]]) {
// Convert SDLButtonName to NSString, since it doesn't conform to <NSCopying>
SDLSubscribeButton *subscribeButton = (SDLSubscribeButton *)request;
SDLButtonName buttonName = subscribeButton.buttonName;
if (!buttonName) {
@throw [NSException sdl_missingIdException];
}
if (subscribeButton.handler) {
self.buttonHandlerMap[buttonName] = subscribeButton.handler;
}
} else if ([request isKindOfClass:[SDLAlert class]]) {
SDLAlert *alert = (SDLAlert *)request;
[self sdl_addToCustomButtonHandlerMap:alert.softButtons];
} else if ([request isKindOfClass:[SDLScrollableMessage class]]) {
SDLScrollableMessage *scrollableMessage = (SDLScrollableMessage *)request;
[self sdl_addToCustomButtonHandlerMap:scrollableMessage.softButtons];
} else if ([request isKindOfClass:[SDLShow class]]) {
SDLShow *show = (SDLShow *)request;
[self sdl_addToCustomButtonHandlerMap:show.softButtons];
}
// Always store the request, it's needed in some cases whether or not there was a handler (e.g. DeleteCommand).
self.rpcRequestDictionary[correlationId] = request;
if (handler) {
self.rpcResponseHandlerMap[correlationId] = handler;
}
}
- (void)clear {
[self.rpcRequestDictionary removeAllObjects];
[self.rpcResponseHandlerMap removeAllObjects];
[self.commandHandlerMap removeAllObjects];
[self.buttonHandlerMap removeAllObjects];
[self.customButtonHandlerMap removeAllObjects];
}
- (void)sdl_addToCustomButtonHandlerMap:(NSMutableArray<SDLSoftButton *> *)softButtons {
for (SDLSoftButton *sb in softButtons) {
if (!sb.softButtonID) {
@throw [NSException sdl_missingIdException];
}
if (sb.handler) {
self.customButtonHandlerMap[sb.softButtonID] = sb.handler;
}
}
}
#pragma mark - Notification Handler
// Called by notifications
- (void)sdl_runHandlersForResponse:(NSNotification *)notification {
NSAssert([notification.userInfo[SDLNotificationUserInfoObject] isKindOfClass:[SDLRPCResponse class]], @"A notification was sent with an unanticipated object");
if (![notification.userInfo[SDLNotificationUserInfoObject] isKindOfClass:[SDLRPCResponse class]]) {
return;
}
__kindof SDLRPCResponse *response = notification.userInfo[SDLNotificationUserInfoObject];
NSError *error = nil;
if (![response.success boolValue]) {
error = [NSError sdl_lifecycle_rpcErrorWithDescription:response.resultCode andReason:response.info];
}
// Find the appropriate request completion handler, remove the request and response handler
SDLResponseHandler handler = self.rpcResponseHandlerMap[response.correlationID];
SDLRPCRequest *request = self.rpcRequestDictionary[response.correlationID];
[self.rpcRequestDictionary safeRemoveObjectForKey:response.correlationID];
[self.rpcResponseHandlerMap safeRemoveObjectForKey:response.correlationID];
// Run the response handler
if (handler) {
handler(request, response, error);
}
// If we errored on the response, the delete / unsubscribe was unsuccessful
if (error) {
return;
}
// If it's a DeleteCommand or UnsubscribeButton, we need to remove handlers for the corresponding commands / buttons
if ([response isKindOfClass:[SDLDeleteCommandResponse class]]) {
SDLDeleteCommand *deleteCommandRequest = (SDLDeleteCommand *)request;
NSNumber *deleteCommandId = deleteCommandRequest.cmdID;
[self.commandHandlerMap safeRemoveObjectForKey:deleteCommandId];
} else if ([response isKindOfClass:[SDLUnsubscribeButtonResponse class]]) {
SDLUnsubscribeButton *unsubscribeButtonRequest = (SDLUnsubscribeButton *)request;
SDLButtonName unsubscribeButtonName = unsubscribeButtonRequest.buttonName;
[self.buttonHandlerMap safeRemoveObjectForKey:unsubscribeButtonName];
}
}
#pragma mark Command
- (void)sdl_runHandlerForCommand:(NSNotification *)notification {
SDLOnCommand *onCommandNotification = notification.userInfo[SDLNotificationUserInfoObject];
SDLRPCNotificationHandler handler = nil;
handler = self.commandHandlerMap[onCommandNotification.cmdID];
if (handler) {
handler(onCommandNotification);
}
}
#pragma mark Button
- (void)sdl_runHandlerForButton:(NSNotification *)notification {
__kindof SDLRPCNotification *rpcNotification = notification.userInfo[SDLNotificationUserInfoObject];
SDLRPCNotificationHandler handler = nil;
SDLButtonName name = nil;
NSNumber *customID = nil;
if ([rpcNotification isKindOfClass:[SDLOnButtonEvent class]]) {
name = ((SDLOnButtonEvent *)rpcNotification).buttonName;
customID = ((SDLOnButtonEvent *)rpcNotification).customButtonID;
} else if ([rpcNotification isKindOfClass:[SDLOnButtonPress class]]) {
name = ((SDLOnButtonPress *)rpcNotification).buttonName;
customID = ((SDLOnButtonPress *)rpcNotification).customButtonID;
}
if ([name isEqualToString:SDLButtonNameCustomButton]) {
handler = self.customButtonHandlerMap[customID];
} else {
handler = self.buttonHandlerMap[name];
}
if (handler) {
handler(rpcNotification);
}
}
@end
NS_ASSUME_NONNULL_END
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