SPEC-1924: AGL Speech Framework's Voice Service High Level 1.0 Release.

Details:
1) Control plugin implementation for VSHL 1.0
2) Exposed APIs that are documented in the confluence page
   https://confluence.automotivelinux.org/display/SPE/Speech+EG+Architecture
3) Implemented 39 unit tests based on GTest framework to test all the low
level components of VSHL binding.
4) Implemented a HTML5 based VSHL API tester application to test VSHL APIs.

API specification:
https://confluence.automotivelinux.org/display/SPE/Speech+EG+Architecture#SpeechEGArchitecture-HighLevelVoiceService

Test performed:
1) Tested AGL service running Alexa Auto SDK https://github.com/alexa/aac-sdk on Ubuntu 16.04 and Renesas R-Car M3 board.

License:
Apache 2.0

Developers/Owners:
Naveen Bobbili (nbobbili@amazon.com)
Prakash Buddhiraja (buddhip@amazon.com)
Shotaro Uchida (shotaru@amazon.co.jp)

Change-Id: I3370f4ad65aff030f24f4ad571fb02d525bbfbca
Signed-off-by: Naveen Bobbili  <nbobbili@amazon.com>

1 files changed, 95 insertions, 0 deletions

diff --git a/src/plugins/voiceagents/include/VoiceAgentEventsHandler.h b/src/plugins/voiceagents/include/VoiceAgentEventsHandler.h
new file mode 100644
index 0000000..3c1ca6c
--- /dev/null
+++ b/src/plugins/voiceagents/include/VoiceAgentEventsHandler.h
@@ -0,0 +1,95 @@
+/*
+ * 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.
+ */
+#ifndef VSHL_VOICEAGENTS_INCLUDE_VOICEAGENTSTATE_EVENT_HANDLER_H_
+#define VSHL_VOICEAGENTS_INCLUDE_VOICEAGENTSTATE_EVENT_HANDLER_H_
+
+#include <algorithm>
+#include <memory>
+#include <unordered_map>
+
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/utilities/events/IEventFilter.h"
+#include "interfaces/utilities/logging/ILogger.h"
+#include "voiceagents/VoiceAgentEventNames.h"
+#include "voiceagents/include/VoiceAgent.h"
+
+using namespace std;
+
+namespace vshl {
+namespace voiceagents {
+/*
+ * This class is reponsible for handling agent specific events
+ * subscription and delivery on behalf of the high level voice service.
+ * This class also listen to the incoming events from voice agents
+ * and implements propagation to application layer.
+ */
+class VoiceAgentEventsHandler : public vshl::common::interfaces::IEventFilter {
+public:
+    // Create a VREventFilter.
+    static shared_ptr<VoiceAgentEventsHandler> create(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi);
+
+    // Creates all the vshl events for a specific voiceagent id.
+    // For e.g if voiceagent is VA-001 then a new vshl event
+    // voice_authstate_event#VA-001 for auth state will be created.
+    // Please see VoiceAgentEventNames.h for all the event names.
+    void createVshlEventsForVoiceAgent(const string voiceAgentId);
+
+    // Removes the events from its bookkeeping.
+    void removeVshlEventsForVoiceAgent(const string voiceAgentId);
+
+    // Subscribe to a vshl event corresponding to a voiceagent.
+    bool subscribeToVshlEventFromVoiceAgent(
+        vshl::common::interfaces::IAFBRequest& request,
+        const string eventName,
+        const shared_ptr<VoiceAgent> voiceAgent);
+
+    ~VoiceAgentEventsHandler();
+
+protected:
+    string getName() override;
+
+    // IEventFilter override
+    bool onIncomingEvent(const string eventName, const string voiceAgentId, const string payload) override;
+
+private:
+    // Constructor
+    VoiceAgentEventsHandler(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi);
+
+    // Helper method to generate the event name with voiceagent Id
+    // concatenated.
+    string createEventNameWithVAId(string eventName, string voiceAgentId);
+
+    // call subscribe verb on the voiceagent. True if subscription successful.
+    // False otherwise.
+    bool callSubscribeVerb(const shared_ptr<VoiceAgent> voiceAgent);
+
+    // Binding API reference
+    shared_ptr<vshl::common::interfaces::IAFBApi> mAfbApi;
+
+    // A map of VSHL event ID to its Event object
+    unordered_map<string, shared_ptr<common::interfaces::IAFBApi::IAFBEvent>> mEventsMap;
+
+    // Logger
+    shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+}  // namespace voiceagents
+}  // namespace vshl
+
+#endif  // VSHL_VOICEAGENTS_INCLUDE_VOICEAGENTSTATE_EVENT_HANDLER_H_