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/*
* Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0/
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include "voiceagents/include/VoiceAgentEventsHandler.h"
#include <json-c/json.h>
static string TAG = "vshlcore::voiceagents::VoiceAgentEventsHandler";
static string VA_VERB_SUBSCRIBE = "subscribe";
using Level = vshlcore::common::interfaces::ILogger::Level;
using namespace vshlcore::common::interfaces;
namespace vshlcore {
namespace voiceagents {
shared_ptr<VoiceAgentEventsHandler> VoiceAgentEventsHandler::create(
shared_ptr<vshlcore::common::interfaces::ILogger> logger,
shared_ptr<vshlcore::common::interfaces::IAFBApi> afbApi) {
auto eventFilter = std::shared_ptr<VoiceAgentEventsHandler>(new VoiceAgentEventsHandler(logger, afbApi));
return eventFilter;
}
VoiceAgentEventsHandler::VoiceAgentEventsHandler(
shared_ptr<vshlcore::common::interfaces::ILogger> logger,
shared_ptr<vshlcore::common::interfaces::IAFBApi> afbApi) :
mAfbApi(afbApi),
mLogger(logger) {
}
VoiceAgentEventsHandler::~VoiceAgentEventsHandler() {
mEventsMap.clear();
}
string VoiceAgentEventsHandler::getName() {
return TAG;
}
void VoiceAgentEventsHandler::createVshlEventsForVoiceAgent(const string voiceAgentId) {
// Update the events map with all the VSHL Events.
for (auto eventName : VSHL_EVENTS) {
string eventNameWithVAId = createEventNameWithVAId(eventName, voiceAgentId);
auto it = mEventsMap.find(eventNameWithVAId);
if (it == mEventsMap.end() && mAfbApi) {
// create a new event and add it to the map.
shared_ptr<IAFBApi::IAFBEvent> event = mAfbApi->createEvent(eventNameWithVAId);
mEventsMap.insert(make_pair(eventNameWithVAId, event));
}
}
}
void VoiceAgentEventsHandler::removeVshlEventsForVoiceAgent(const string voiceAgentId) {
// Update the events map with all the VSHL Events.
for (auto eventName : VSHL_EVENTS) {
string eventNameWithVAId = createEventNameWithVAId(eventName, voiceAgentId);
auto it = mEventsMap.find(eventNameWithVAId);
if (it != mEventsMap.end()) {
mEventsMap.erase(it);
}
}
}
bool VoiceAgentEventsHandler::subscribeToVshlEventFromVoiceAgent(
vshlcore::common::interfaces::IAFBRequest& request,
const string eventName,
const shared_ptr<VoiceAgent> voiceAgent) {
auto supportedEventsIt = find(VSHL_EVENTS.begin(), VSHL_EVENTS.end(), eventName);
if (supportedEventsIt == VSHL_EVENTS.end()) {
mLogger->log(Level::ERROR, TAG, "Event: " + eventName + " not a known event.");
return false;
}
// Check if the entry for the voiceagent is present in the
// events map. If not then return false because the responsibility
// of adding to the map lies in the hands of AddVoiceAgent method.
string eventNameWithVAId = createEventNameWithVAId(eventName, voiceAgent->getId());
auto createdEventsIt = mEventsMap.find(eventNameWithVAId);
if (createdEventsIt == mEventsMap.end()) {
mLogger->log(Level::ERROR, TAG, "Not able to subscribe. Event doesn't exist, " + eventNameWithVAId);
return false;
}
createdEventsIt->second->subscribe(request);
if (!callSubscribeVerb(voiceAgent)) {
mLogger->log(Level::WARNING, TAG, "Failed to subscribe to voiceagent: " + voiceAgent->getId());
}
return true;
}
// IEventFilter override.
bool VoiceAgentEventsHandler::onIncomingEvent(const string eventName, const string voiceAgentId, const string payload) {
string eventNameWithVAId = createEventNameWithVAId(eventName, voiceAgentId);
auto it = mEventsMap.find(eventNameWithVAId);
if (it != mEventsMap.end()) {
json_object* payloadJ = NULL;
if(payload.length()) {
payloadJ = json_tokener_parse(payload.c_str());
} else {
payloadJ = json_object_new_string("");
}
if(!payloadJ) {
mLogger->log(Level::ERROR, TAG, "Unable to parse payload JSON: " + payload);
return false;
}
return it->second->publishEvent(payloadJ);
}
return true;
}
string VoiceAgentEventsHandler::createEventNameWithVAId(string eventName, string voiceAgentId) {
return eventName + "#" + voiceAgentId;
}
bool VoiceAgentEventsHandler::callSubscribeVerb(const shared_ptr<VoiceAgent> voiceAgent) {
if (!voiceAgent) {
mLogger->log(Level::ERROR, TAG, "Failed to callSubscribeVerb. Invalid input parameter.");
return false;
}
if (!mAfbApi) {
mLogger->log(
Level::ERROR, TAG, "Failed to callSubscribeVerb on voicegent: " + voiceAgent->getId() + ", No API.");
return false;
}
// TODO(Naveen): Move to utilities.
json_object* object = NULL;
std::string error, info;
int rc = mAfbApi->callSync(voiceAgent->getApi(), VA_VERB_SUBSCRIBE, NULL, &object, error, info);
if (object) {
free(object);
}
return true;
}
} // namespace voiceagents
} // namespace vshl
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