1 files changed, 261 insertions, 0 deletions
diff --git a/src/libcloudproxy.cpp b/src/libcloudproxy.cpp
new file mode 100644
index 0000000..7b0f605
--- /dev/null
+++ b/src/libcloudproxy.cpp
@@ -0,0 +1,261 @@
+/*
+ * Copyright (C) 2020 MERA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License 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 <thread>
+#include <algorithm>
+
+#include "libcloudproxy.h"
+#include "hmi-debug.h"
+
+
+static const char API_name[] = "cloudproxy";
+
+const std::vector<std::string> CloudProxyClient::m_api_list {
+        std::string("ping"),
+        std::string("createConnection"),
+        std::string("sendMessage"),
+        std::string("destroyConnection")
+    };
+
+const std::vector<std::string> CloudProxyClient::m_event_list {
+        std::string("sendMessageConfirmation"),
+        std::string("receivedMessage")
+    };
+
+static void event_loop_run(sd_event* loop)
+{
+    sd_event_loop(loop);
+    sd_event_unref(loop);
+}
+
+static void on_hangup(void *closure, afb_wsj1 *wsj)
+{
+    HMI_DEBUG("cloudproxyclient", "called");
+    (void)closure;
+    (void)wsj;
+}
+
+static void on_call(void *closure, const char *api, const char *verb, afb_wsj1_msg *msg)
+{
+    HMI_ERROR("cloudproxyclient", "this method should not be called");
+    (void)closure;
+    (void)api;
+    (void)verb;
+    (void)msg;
+}
+
+static void on_event(void* closure, const char* event, afb_wsj1_msg *msg)
+{
+    HMI_DEBUG("cloudproxyclient", "event [%s]", (event ? event: ""));
+    (void)closure;
+
+    static_cast<CloudProxyClient*>(closure)->on_event(nullptr, event, msg);
+}
+
+static void on_reply(void *closure, afb_wsj1_msg *msg)
+{
+    HMI_DEBUG("cloudproxyclient", "called");
+    (void)closure;
+    (void)msg;
+}
+
+
+CloudProxyClient::CloudProxyClient()
+{
+}
+
+CloudProxyClient::~CloudProxyClient()
+{
+    if(m_websock)
+    {
+        afb_wsj1_unref(m_websock);
+    }
+    if(m_loop)
+    {
+        sd_event_exit(m_loop, 0);
+    }
+}
+
+int CloudProxyClient::init(const int port, const std::string& token)
+{
+    int ret = 0;
+    if(port <= 0 && token.size() == 0)
+    {
+        HMI_ERROR("cloudproxyclient","port and token should be > 0, Initial port and token uses.");
+        return -1;
+    }
+
+    {
+        m_loop = nullptr;
+        int ret = sd_event_new(&m_loop);
+        if(ret < 0)
+        {
+            HMI_ERROR("cloudproxyclient","Failed to create event loop");
+            return -1;
+        }
+
+        {
+            // enforce context to avoid initialization/goto error
+            std::thread th(event_loop_run, m_loop);
+            th.detach();
+        }
+
+        /* Initialize interface from websocket */
+        m_itf.on_hangup = ::on_hangup;
+        m_itf.on_call = ::on_call;
+        m_itf.on_event = ::on_event;
+
+        m_uri += "ws://localhost:" + std::to_string(port) + "/api?token=" + token;
+
+        m_websock = afb_ws_client_connect_wsj1(m_loop, m_uri.c_str(), &m_itf, this);
+        if(!m_websock)
+        {
+            HMI_ERROR("cloudproxyclient","Failed to create websocket connection");
+            return -1;
+        }
+    }
+
+    HMI_DEBUG("cloudproxyclient", "Initialized");
+
+    return ret;
+}
+
+
+int CloudProxyClient::call(const std::string& verb, json_object* arg)
+{
+    int ret;
+    if(!m_websock)
+    {
+        return -1;
+    }
+
+    if (verb.empty() || m_api_list.end() == std::find(m_api_list.begin(), m_api_list.end(), verb))
+    {
+        HMI_ERROR("cloudproxyclient","verb [%s] doesn't exit", verb.c_str());
+        return -1;
+    }
+
+    ret = afb_wsj1_call_j(m_websock, API_name, verb.c_str(), arg, ::on_reply, this);
+    if (ret < 0)
+    {
+        HMI_ERROR("cloudproxyclient", "Failed to call verb:%s", verb.c_str());
+    }
+
+    return ret;
+}
+
+
+int CloudProxyClient::sendMessage(const std::string& data)
+{
+    if(!m_websock)
+        return -1;
+
+    json_object* j_obj = json_object_new_object();
+    json_object_object_add(j_obj, "data", json_object_new_string(data.c_str()));
+
+    return this->call("sendMessage", j_obj);
+}
+
+void CloudProxyClient::set_event_handler(enum EventType et, handler_func f)
+{
+    if (et > Event_Min && et < Event_Max)
+    {
+        switch (et)
+        {
+            case Event_SendMessageConfirmation:
+                this->subscribe(CloudProxyClient::m_event_list[0]);
+                break;
+            case Event_ReceivedMessage:
+                this->subscribe(CloudProxyClient::m_event_list[1]);
+                break;
+            default:
+                break;
+        }
+
+        this->handlers[et] = std::move(f);
+    }
+}
+
+int CloudProxyClient::subscribe(const std::string& event_name)
+{
+    if(!m_websock)
+        return -1;
+
+    json_object* j_obj = json_object_new_object();
+    json_object_object_add(j_obj, "event", json_object_new_string(event_name.c_str()));
+
+    int ret = afb_wsj1_call_j(m_websock, API_name, "subscribe", j_obj, ::on_reply, this);
+    if (ret < 0)
+        HMI_ERROR("cloudproxyclient", "subscribe filed for '%s'", event_name.c_str());
+
+    return ret;
+}
+
+int CloudProxyClient::unsubscribe(const std::string& event_name)
+{
+    if(!m_websock)
+        return -1;
+
+    json_object* j_obj = json_object_new_object();
+    json_object_object_add(j_obj, "event", json_object_new_string(event_name.c_str()));
+
+    int ret = afb_wsj1_call_j(m_websock, API_name, "unsubscribe", j_obj, ::on_reply, this);
+    if (ret < 0)
+        HMI_ERROR("cloudproxyclient", "unsubscribe filed for '%s'", event_name.c_str());
+
+    return ret;
+}
+
+void CloudProxyClient::on_event(void *closure, const char *event, afb_wsj1_msg *msg)
+{
+    HMI_DEBUG("cloudproxyclient", "event: (%s) msg: (%s).", event, afb_wsj1_msg_object_s(msg));
+    (void) closure;
+
+    if (strstr(event, API_name) == nullptr)
+        return;
+
+
+    json_object* ev_contents = afb_wsj1_msg_object_j(msg);
+    json_object *json_data;
+    if(!json_object_object_get_ex(ev_contents, "data", &json_data))
+    {
+        HMI_ERROR("cloudproxyclient", "got ev_contents error.");
+        return;
+    }
+
+    const char* event_type = nullptr;
+    json_object *json_event_type;
+    if(!json_object_object_get_ex(json_data, "type", &json_event_type) ||
+       (event_type = json_object_get_string(json_event_type)) == nullptr)
+    {
+        HMI_ERROR("cloudproxyclient", "event_type is null.");
+        return;
+    }
+
+    const std::string et{event_type};
+    if (CloudProxyClient::m_event_list[0] == et)
+    {
+        auto i = this->handlers.find(Event_SendMessageConfirmation);
+        if (i != this->handlers.end())
+            i->second(json_data);
+    }
+    else if (CloudProxyClient::m_event_list[1] == et)
+    {
+        auto i = this->handlers.find(Event_ReceivedMessage);
+        if (i != this->handlers.end())
+            i->second(json_data);
+    }
+}