Improve homescreen-service

1.Improve class cohesion and reduce public interface number
2.Unified event pattern

BUG-AGL: SPEC-2120

Change-Id: I4c5066be2deaf2b809af66cb5a8acdc5bffa5a23
Signed-off-by: wang_zhiqiang <wang_zhiqiang@dl.cn.nexty-ele.com>

5 files changed, 359 insertions, 519 deletions

diff --git a/src/homescreen.cpp b/src/homescreen.cpp
index fce25ee..e921feb 100644
--- a/src/homescreen.cpp
+++ b/src/homescreen.cpp
@@ -58,17 +58,25 @@ static void pingSample(afb_req_t request)
 static void tap_shortcut (afb_req_t request)
 {
     HMI_NOTICE("homescreen-service","called.");
-    int ret = g_client_manager->tap_shortcut(request);
-    if (ret != 0) {
-      afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
-      return;
+    int ret = 0;
+    const char* value = afb_req_value(request, _application_id);
+    if (value) {
+        HMI_NOTICE("homescreen-service","request appid = %s.", value);
+        ret = g_client_manager->handleRequest(request, __FUNCTION__, value);
+    }
+    else {
+        ret = AFB_EVENT_BAD_REQUEST;
     }
 
-    // response to HomeScreen
-    struct json_object *res = json_object_new_object();
-    hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
-      _error,  ret);
-    afb_req_success(request, res, "afb_event_push event [tap_shortcut]");
+    if (ret) {
+        afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
+    }
+    else {
+        struct json_object *res = json_object_new_object();
+        hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
+          _error,  ret);
+        afb_req_success(request, res, "afb_event_push event [tap_shortcut]");
+    }
 }
 
 /**
@@ -85,18 +93,16 @@ static void tap_shortcut (afb_req_t request)
 static void on_screen_message (afb_req_t request)
 {
     HMI_NOTICE("homescreen-service","called.");
-
-    int ret = g_client_manager->on_screen_message(request);
-    if (ret != 0) {
-      afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
-      return;
+    int ret = g_client_manager->handleRequest(request, __FUNCTION__);
+    if (ret) {
+        afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
+    }
+    else {
+        struct json_object *res = json_object_new_object();
+        hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
+          _error,  ret);
+        afb_req_success(request, res, "afb_event_push event [on_screen_message]");
     }
-
-  // response to HomeScreen
-    struct json_object *res = json_object_new_object();
-    hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
-      _error,  ret);
-    afb_req_success(request, res, "afb_event_push event [on_screen_message]");
 }
 
 /**
@@ -113,18 +119,16 @@ static void on_screen_message (afb_req_t request)
 static void on_screen_reply (afb_req_t request)
 {
     HMI_NOTICE("homescreen-service","called.");
-
-    int ret = g_client_manager->on_screen_reply(request);
-    if (ret != 0) {
-      afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
-      return;
+    int ret = g_client_manager->handleRequest(request, __FUNCTION__);
+    if (ret) {
+        afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
+    }
+    else {
+        struct json_object *res = json_object_new_object();
+        hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
+          _error,  ret);
+        afb_req_success(request, res, "afb_event_push event [on_screen_reply]");
     }
-
-  // response to HomeScreen
-    struct json_object *res = json_object_new_object();
-    hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
-      _error,  ret);
-    afb_req_success(request, res, "afb_event_push event [on_screen_reply]");
 }
 
 /**
@@ -140,18 +144,24 @@ static void on_screen_reply (afb_req_t request)
 static void subscribe(afb_req_t request)
 {
     HMI_NOTICE("homescreen-service","called.");
+    int ret = 0;
+    std::string req_appid = std::move(get_application_id(request));
+    if(!req_appid.empty()) {
+        ret = g_client_manager->handleRequest(request, __FUNCTION__, req_appid.c_str());
+    }
+    else {
+        ret = AFB_EVENT_BAD_REQUEST;
+    }
 
-    int ret = g_client_manager->subscribe(request);
     if(ret) {
-      afb_req_fail_f(request, "afb_req_subscribe failed", "called %s.", __FUNCTION__);
-      return;
+        afb_req_fail_f(request, "afb_req_subscribe failed", "called %s.", __FUNCTION__);
+    }
+    else {
+        struct json_object *res = json_object_new_object();
+        hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
+            _error, ret);
+        afb_req_success_f(request, res, "homescreen binder subscribe.");
     }
-
-    /*create response json object*/
-    struct json_object *res = json_object_new_object();
-    hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
-        _error, ret);
-    afb_req_success_f(request, res, "homescreen binder subscribe.");
 }
 
 /**
@@ -167,18 +177,24 @@ static void subscribe(afb_req_t request)
 static void unsubscribe(afb_req_t request)
 {
     HMI_NOTICE("homescreen-service","called.");
+    int ret = 0;
+    std::string req_appid = std::move(get_application_id(request));
+    if(!req_appid.empty()) {
+        ret = g_client_manager->handleRequest(request, __FUNCTION__, req_appid.c_str());
+    }
+    else {
+        ret = AFB_EVENT_BAD_REQUEST;
+    }
 
-    int ret = g_client_manager->unsubscribe(request);
     if(ret) {
-      afb_req_fail_f(request, "afb_req_unsubscribe failed", "called %s.", __FUNCTION__);
-      return;
+        afb_req_fail_f(request, "afb_req_unsubscribe failed", "called %s.", __FUNCTION__);
+    }
+    else {
+        struct json_object *res = json_object_new_object();
+        hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
+            _error, ret);
+        afb_req_success_f(request, res, "homescreen binder unsubscribe success.");
     }
-
-    /*create response json object*/
-    struct json_object *res = json_object_new_object();
-    hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
-        _error, ret);
-    afb_req_success_f(request, res, "homescreen binder unsubscribe success.");
 }
 
 /**
@@ -194,18 +210,24 @@ static void unsubscribe(afb_req_t request)
 static void showWindow(afb_req_t request)
 {
     HMI_NOTICE("homescreen-service","called.");
-
-    int ret = g_client_manager->showWindow(request);
-    if (ret != 0) {
-      afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
-      return;
+    int ret = 0;
+    const char* value = afb_req_value(request, _application_id);
+    if (value) {
+        ret = g_client_manager->handleRequest(request, __FUNCTION__, value);
+    }
+    else {
+        ret = AFB_EVENT_BAD_REQUEST;
     }
 
-    // response to HomeScreen
-    struct json_object *res = json_object_new_object();
-    hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
-      _error,  ret);
-    afb_req_success(request, res, "afb_event_push event [showWindow]");
+    if (ret) {
+        afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
+    }
+    else {
+        struct json_object *res = json_object_new_object();
+        hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
+          _error,  ret);
+        afb_req_success(request, res, "afb_event_push event [showWindow]");
+    }
 }
 
 /**
@@ -221,18 +243,24 @@ static void showWindow(afb_req_t request)
 static void hideWindow(afb_req_t request)
 {
     HMI_NOTICE("homescreen-service","called.");
-
-    int ret = g_client_manager->hideWindow(request);
-    if (ret != 0) {
-      afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
-      return;
+    int ret = 0;
+    const char* value = afb_req_value(request, _application_id);
+    if (value) {
+        ret = g_client_manager->handleRequest(request, __FUNCTION__, value);
+    }
+    else {
+        ret = AFB_EVENT_BAD_REQUEST;
     }
 
-    // response to HomeScreen
-    struct json_object *res = json_object_new_object();
-    hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
-      _error,  ret);
-    afb_req_success(request, res, "afb_event_push event [hideWindow]");
+    if (ret) {
+        afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
+    }
+    else {
+        struct json_object *res = json_object_new_object();
+        hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
+          _error,  ret);
+        afb_req_success(request, res, "afb_event_push event [hideWindow]");
+    }
 }
 
 /**
@@ -248,18 +276,24 @@ static void hideWindow(afb_req_t request)
 static void replyShowWindow(afb_req_t request)
 {
     HMI_NOTICE("homescreen-service","called.");
-
-    int ret = g_client_manager->replyShowWindow(request);
-    if (ret != 0) {
-      afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
-      return;
+    int ret = 0;
+    const char* value = afb_req_value(request, _application_id);
+    if (value) {
+        ret = g_client_manager->handleRequest(request, __FUNCTION__, value);
+    }
+    else {
+        ret = AFB_EVENT_BAD_REQUEST;
     }
 
-    // response to HomeScreen
-    struct json_object *res = json_object_new_object();
-    hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
-      _error,  ret);
-    afb_req_success(request, res, "afb_event_push event [replyShowWindow]");
+    if (ret) {
+        afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
+    }
+    else {
+        struct json_object *res = json_object_new_object();
+        hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
+          _error,  ret);
+        afb_req_success(request, res, "afb_event_push event [replyShowWindow]");
+    }
 }
 
 /**
@@ -277,18 +311,16 @@ static void replyShowWindow(afb_req_t request)
 static void showNotification(afb_req_t request)
 {
     HMI_NOTICE("homescreen-service","called.");
-
-    int ret = g_client_manager->showNotification(request);
-    if (ret != 0) {
-      afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
-      return;
+    int ret = g_client_manager->handleRequest(request, __FUNCTION__, "homescreen");
+    if (ret) {
+        afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
+    }
+    else {
+        struct json_object *res = json_object_new_object();
+        hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
+          _error,  ret);
+        afb_req_success(request, res, "afb_event_push event [showNotification]");
     }
-
-    // response to Application
-    struct json_object *res = json_object_new_object();
-    hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
-      _error,  ret);
-    afb_req_success(request, res, "afb_event_push event [showNotification]");
 }
 
 /**
@@ -306,18 +338,16 @@ static void showNotification(afb_req_t request)
 static void showInformation(afb_req_t request)
 {
     HMI_NOTICE("homescreen-service","called.");
-
-    int ret = g_client_manager->showInformation(request);
-    if (ret != 0) {
-      afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
-      return;
+    int ret = g_client_manager->handleRequest(request,  __FUNCTION__, "homescreen");
+    if (ret) {
+        afb_req_fail_f(request, "failed", "called %s, Unknown parameter", __FUNCTION__);
+    }
+    else {
+        struct json_object *res = json_object_new_object();
+        hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
+          _error,  ret);
+        afb_req_success(request, res, "afb_event_push event [showInformation]");
     }
-
-    // response to Application
-    struct json_object *res = json_object_new_object();
-    hs_add_object_to_json_object_func(res, __FUNCTION__, 2,
-      _error,  ret);
-    afb_req_success(request, res, "afb_event_push event [showInformation]");
 }
 
 /*
diff --git a/src/hs-client.cpp b/src/hs-client.cpp
index e97f844..f508f3d 100644
--- a/src/hs-client.cpp
+++ b/src/hs-client.cpp
@@ -18,12 +18,28 @@
 #include "hs-helper.h"
 #include "hmi-debug.h"
 
+static const char _event[] = "event";
 static const char _type[] = "type";
 static const char _text[] = "text";
 static const char _info[] = "info";
 static const char _icon[] = "icon";
 static const char _parameter[] = "parameter";
 static const char _replyto[] = "replyto";
+static const char _caller[] = "caller";
+
+// homescreen-service event and event handler function list
+const std::unordered_map<std::string, HS_Client::func_handler> HS_Client::func_list {
+    {"tap_shortcut",        &HS_Client::tap_shortcut},
+    {"showWindow",          &HS_Client::showWindow},
+    {"hideWindow",          &HS_Client::hideWindow},
+    {"replyShowWindow",     &HS_Client::replyShowWindow},
+    {"on_screen_message",   &HS_Client::on_screen_message},
+    {"on_screen_reply",     &HS_Client::on_screen_reply},
+    {"subscribe",           &HS_Client::subscribe},
+    {"unsubscribe",         &HS_Client::unsubscribe},
+    {"showNotification",    &HS_Client::showNotification},
+    {"showInformation",     &HS_Client::showInformation}
+};
 
 /**
  * HS_Client construction function
@@ -61,20 +77,18 @@ HS_Client::~HS_Client()
  * push tap_shortcut event
  *
  * #### Parameters
- *  - appid: app's id.
+ *  - request : the request
  *
  * #### Return
- * result
+ * 0 : success
+ * others : fail
  *
  */
-int HS_Client::tap_shortcut(const char* appid)
+int HS_Client::tap_shortcut(afb_req_t request)
 {
-    if(!checkEvent(__FUNCTION__))
-        return 0;
-
-    HMI_NOTICE("homescreen-service","%s application_id = %s.", __FUNCTION__, appid);
+    HMI_NOTICE("homescreen-service","request appid = %s.", my_id.c_str());
     struct json_object* push_obj = json_object_new_object();
-    hs_add_object_to_json_object_str( push_obj, 4, _application_id, appid,
+    hs_add_object_to_json_object_str( push_obj, 4, _application_id, my_id.c_str(),
     _type, __FUNCTION__);
     afb_event_push(my_event, push_obj);
     return 0;
@@ -84,71 +98,96 @@ int HS_Client::tap_shortcut(const char* appid)
  * push on_screen_message event
  *
  * #### Parameters
- *  - message: post message.
+ *  - request : the request
  *
  * #### Return
- * result
+ * 0 : success
+ * others : fail
  *
  */
-int HS_Client::on_screen_message(afb_req_t request, const char* message)
+int HS_Client::on_screen_message(afb_req_t request)
 {
-    if(!checkEvent(__FUNCTION__))
-        return 0;
-
-    HMI_NOTICE("homescreen-service","push %s event message [%s].", __FUNCTION__, message);
-    struct json_object* push_obj = json_object_new_object();
-    hs_add_object_to_json_object_str( push_obj, 4, _display_message, message,
-    _type, __FUNCTION__);
-    afb_event_push(my_event, push_obj);
-    return 0;
+    int ret = 0;
+    const char* value = afb_req_value(request, _display_message);
+    if (value) {
+        HMI_NOTICE("homescreen-service","push %s event message [%s].", __FUNCTION__, value);
+        struct json_object* push_obj = json_object_new_object();
+        hs_add_object_to_json_object_str( push_obj, 4, _display_message, value,
+        _type, __FUNCTION__);
+        afb_event_push(my_event, push_obj);
+    }
+    else {
+        HMI_NOTICE("homescreen-service","Please input display_message");
+        ret = AFB_EVENT_BAD_REQUEST;
+    }
+    return ret;
 }
 
 /**
  * push on_screen_reply event
  *
  * #### Parameters
- *  - message: reply message.
+ *  - request : the request
  *
  * #### Return
- * result
+ * 0 : success
+ * others : fail
  *
  */
-int HS_Client::on_screen_reply(afb_req_t request, const char* message)
+int HS_Client::on_screen_reply(afb_req_t request)
 {
-    if(!checkEvent(__FUNCTION__))
-        return 0;
-
-    HMI_NOTICE("homescreen-service","push %s event message [%s].", __FUNCTION__, message);
-    struct json_object* push_obj = json_object_new_object();
-    hs_add_object_to_json_object_str( push_obj, 4, _reply_message, message,
-    _type, __FUNCTION__);
-    afb_event_push(my_event, push_obj);
-    return 0;
+    int ret = 0;
+    const char* value = afb_req_value(request, _reply_message);
+    if (value) {
+        HMI_NOTICE("homescreen-service","push %s event message [%s].", __FUNCTION__, value);
+        struct json_object* push_obj = json_object_new_object();
+        hs_add_object_to_json_object_str( push_obj, 4, _reply_message, value,
+        _type, __FUNCTION__);
+        afb_event_push(my_event, push_obj);
+    }
+    else {
+        HMI_NOTICE("homescreen-service","Please input reply_message");
+        ret = AFB_EVENT_BAD_REQUEST;
+    }
+    return ret;
 }
 
 /**
  * subscribe event
  *
  * #### Parameters
- *  - event: homescreen event, tap_shortcut etc.
+ *  - request : the request
  *
  * #### Return
- * result
+ * 0 : success
+ * others : fail
  *
  */
-int HS_Client::subscribe(afb_req_t request, const char* event)
+int HS_Client::subscribe(afb_req_t request)
 {
+    HMI_NOTICE("homescreen-service"," called.");
     int ret = 0;
-    auto ip = event_list.find(std::string(event));
-    if(ip == event_list.end()) {
-        event_list[std::string(event)] = 0;
-    }
-    if(!subscription) {
-        ret = afb_req_subscribe(request, my_event);
-        if(ret == 0) {
-            subscription = true;
+    const char *value = afb_req_value(request, _event);
+    if(value) {
+        HMI_NOTICE("homescreen-service","subscribe event %s", value);
+        if(!isSupportEvent(value)) {
+            HMI_NOTICE("homescreen-service","subscibe event isn't existing.");
+            ret = AFB_EVENT_BAD_REQUEST;
+        }
+        else {
+            event_list.insert(std::string(value));
+            if(!subscription) {
+                ret = afb_req_subscribe(request, my_event);
+                if(ret == 0) {
+                    subscription = true;
+                }
+            }
         }
     }
+    else {
+        HMI_NOTICE("homescreen-service","Please input event name");
+        ret = AFB_EVENT_BAD_REQUEST;
+    }
     return ret;
 }
 
@@ -156,64 +195,49 @@ int HS_Client::subscribe(afb_req_t request, const char* event)
  * unsubscribe event
  *
  * #### Parameters
- *  - event: homescreen event, tap_shortcut etc.
+ *  - request : the request
  *
  * #### Return
- * result
+ * 0 : success
+ * others : fail
  *
  */
-int HS_Client::unsubscribe(afb_req_t request, const char* event)
+int HS_Client::unsubscribe(afb_req_t request)
 {
+    HMI_NOTICE("homescreen-service"," called.");
     int ret = 0;
-    event_list.erase(std::string(event));
-    if(event_list.empty()) {
-        ret = afb_req_unsubscribe(request, my_event);
+    const char *value = afb_req_value(request, _event);
+    if(value) {
+        HMI_NOTICE("homescreen-service","unsubscribe %s event", value);
+        event_list.erase(std::string(value));
+        if(event_list.empty()) {
+            ret = afb_req_unsubscribe(request, my_event);
+        }
+    }
+    else {
+        HMI_NOTICE("homescreen-service","Please input event name");
+        ret = AFB_EVENT_BAD_REQUEST;
     }
     return ret;
 }
 
 /**
- * check if client subscribe event
- *
- * #### Parameters
- *  - event: homescreen event, tap_shortcut etc.
- *
- * #### Return
- * true: found
- * false: not found
- *
- */
-bool HS_Client::checkEvent(const char* event)
-{
-    auto ip = event_list.find(std::string(event));
-    if(ip == event_list.end())
-        return false;
-    else
-        return true;
-}
-
-/**
  * showWindow event
  *
- * input contents : {"application_id":"the appid that want to display", "parameter":{"area": "display area", ...}}
- *
  * #### Parameters
  * - request : the request
- * - appid : the appid that want to display
  *
  * #### Return
  * 0 : success
  * others : fail
  *
  */
-int HS_Client::showWindow(afb_req_t request, const char* appid)
+int HS_Client::showWindow(afb_req_t request)
 {
-    if(!checkEvent(__FUNCTION__))
-        return 0;
-
-    HMI_NOTICE("homescreen-service","%s application_id = %s.", __FUNCTION__, appid);
+    HMI_NOTICE("homescreen-service","%s application_id = %s.", __FUNCTION__, my_id.c_str());
+    int ret = 0;
     struct json_object* push_obj = json_object_new_object();
-    hs_add_object_to_json_object_str( push_obj, 4, _application_id, appid, _type, __FUNCTION__);
+    hs_add_object_to_json_object_str( push_obj, 4, _application_id, my_id.c_str(), _type, __FUNCTION__);
     const char* param = afb_req_value(request, _parameter);
     if(param) {
         std::string req_appid = std::move(get_application_id(request));
@@ -225,20 +249,18 @@ int HS_Client::showWindow(afb_req_t request, const char* appid)
         struct json_object* param_obj = json_tokener_parse(param);
         json_object_object_add(param_obj, _replyto, json_object_new_string(req_appid.c_str()));
         json_object_object_add(push_obj, _parameter, param_obj);
+        afb_event_push(my_event, push_obj);
     }
     else {
         HMI_ERROR("homescreen-service","please input correct parameter.");
-        return AFB_EVENT_BAD_REQUEST;
+        ret = AFB_EVENT_BAD_REQUEST;
     }
-    afb_event_push(my_event, push_obj);
-    return 0;
+    return ret;
 }
 
 /**
  * hideWindow event
  *
- * input contents : {"application_id":"the appid that want to hide"}
- *
  * #### Parameters
  * - request : the request
  *
@@ -249,10 +271,7 @@ int HS_Client::showWindow(afb_req_t request, const char* appid)
  */
 int HS_Client::hideWindow(afb_req_t request)
 {
-    if(!checkEvent(__FUNCTION__))
-        return 0;
-
-    HMI_NOTICE("homescreen-service","%s called.", __FUNCTION__);
+    HMI_NOTICE("homescreen-service"," called.");
     std::string req_appid = std::move(get_application_id(request));
     if(req_appid.empty()) {
         HMI_NOTICE("homescreen-service","can't get application identifier");
@@ -260,8 +279,11 @@ int HS_Client::hideWindow(afb_req_t request)
     }
 
     struct json_object* push_obj = json_object_new_object();
-    hs_add_object_to_json_object_str( push_obj, 4, _application_id, req_appid.c_str(),
+    hs_add_object_to_json_object_str( push_obj, 4, _application_id, my_id.c_str(),
     _type, __FUNCTION__);
+    struct json_object* param_obj = json_object_new_object();
+    json_object_object_add(param_obj, _caller, json_object_new_string(req_appid.c_str()));
+    json_object_object_add(push_obj, _parameter, param_obj);
     afb_event_push(my_event, push_obj);
     return 0;
 }
@@ -269,43 +291,35 @@ int HS_Client::hideWindow(afb_req_t request)
 /**
  * replyShowWindow event
  *
- * input contens : {"application_id": "the appid that want to reply",  "parameter": {...}}
- *
  * #### Parameters
  * - request : the request
- * - appid : the appid that want to reply
  *
  * #### Return
  * 0 : success
  * others : fail
  *
  */
-int HS_Client::replyShowWindow(afb_req_t request, const char* appid)
+int HS_Client::replyShowWindow(afb_req_t request)
 {
-    if(!checkEvent(__FUNCTION__))
-        return 0;
-
-    HMI_NOTICE("homescreen-service","%s application_id = %s.", __FUNCTION__, appid);
+    HMI_NOTICE("homescreen-service","%s application_id = %s.", __FUNCTION__, my_id.c_str());
+    int ret = 0;
     struct json_object* push_obj = json_object_new_object();
-    hs_add_object_to_json_object_str( push_obj, 4, _application_id, appid, _type, __FUNCTION__);
+    hs_add_object_to_json_object_str( push_obj, 4, _application_id, my_id.c_str(), _type, __FUNCTION__);
     const char* param = afb_req_value(request, _parameter);
     if(param) {
         json_object_object_add(push_obj, _parameter, json_tokener_parse(param));
+        afb_event_push(my_event, push_obj);
     }
     else {
         HMI_ERROR("homescreen-service","please input correct parameter.");
-        return AFB_EVENT_BAD_REQUEST;
+        ret = AFB_EVENT_BAD_REQUEST;
     }
-
-    afb_event_push(my_event, push_obj);
-    return 0;
+    return ret;
 }
 
 /**
  * showNotification event
  *
- * input contents : {"icon": "icon path", "text": "message contents"}
- *
  * #### Parameters
  *  - request : the request
  *
@@ -316,6 +330,7 @@ int HS_Client::replyShowWindow(afb_req_t request, const char* appid)
  */
 int HS_Client::showNotification(afb_req_t request)
 {
+    HMI_NOTICE("homescreen-service"," called.");
     int ret = 0;
     const char *value = afb_req_value(request, _text);
     if(value) {
@@ -331,8 +346,9 @@ int HS_Client::showNotification(afb_req_t request)
         if(icon) {
             json_object_object_add(param_obj, _icon, json_object_new_string(icon));
             json_object_object_add(param_obj, _text, json_object_new_string(value));
+            json_object_object_add(param_obj, _caller, json_object_new_string(appid.c_str()));
             struct json_object* push_obj = json_object_new_object();
-            hs_add_object_to_json_object_str( push_obj, 4, _application_id, appid.c_str(), _type, __FUNCTION__);
+            hs_add_object_to_json_object_str( push_obj, 4, _application_id, my_id.c_str(), _type, __FUNCTION__);
             json_object_object_add(push_obj, _parameter, param_obj);
             afb_event_push(my_event, push_obj);
         }
@@ -352,8 +368,6 @@ int HS_Client::showNotification(afb_req_t request)
 /**
  * showInformation event
  *
- * input contents : {"info": "information contents"}
- *
  * #### Parameters
  *  - request : the request
  *
@@ -364,6 +378,7 @@ int HS_Client::showNotification(afb_req_t request)
  */
 int HS_Client::showInformation(afb_req_t request)
 {
+    HMI_NOTICE("homescreen-service"," called.");
     int ret = 0;
     const char *value = afb_req_value(request, _info);
     if(value) {
@@ -377,7 +392,7 @@ int HS_Client::showInformation(afb_req_t request)
         struct json_object* param_obj = json_object_new_object();
         json_object_object_add(param_obj, _info, json_object_new_string(value));
         struct json_object* push_obj = json_object_new_object();
-        hs_add_object_to_json_object_str( push_obj, 4, _application_id, appid.c_str(), _type, __FUNCTION__);
+        hs_add_object_to_json_object_str( push_obj, 4, _application_id, my_id.c_str(), _type, __FUNCTION__);
         json_object_object_add(push_obj, _parameter, param_obj);
         afb_event_push(my_event, push_obj);
     }
@@ -388,3 +403,70 @@ int HS_Client::showInformation(afb_req_t request)
 
     return ret;
 }
+
+/**
+ * check if client subscribe event
+ *
+ * #### Parameters
+ *  - event: homescreen event, tap_shortcut etc.
+ *
+ * #### Return
+ * true: found
+ * false: not found
+ *
+ */
+bool HS_Client::checkEvent(const char* event)
+{
+    auto ip = event_list.find(std::string(event));
+    if(ip == event_list.end())
+        return false;
+    else
+        return true;
+}
+
+/**
+ * check if event is supporting
+ *
+ * #### Parameters
+ *  - event: homescreen event, tap_shortcut etc.
+ *
+ * #### Return
+ * true: support
+ * false: not fosupportund
+ *
+ */
+bool HS_Client::isSupportEvent(const char* event)
+{
+    auto ip = func_list.find(std::string(event));
+    if(ip == func_list.end())
+        return false;
+    else
+        return true;
+}
+
+/**
+ * handle homescreen event
+ *
+ * #### Parameters
+ *  - request : the request
+ *  - verb: request verb name
+ *
+ * #### Return
+ * 0: success
+ * others: fail
+ *
+ */
+int HS_Client::handleRequest(afb_req_t request, const char *verb)
+{
+    HMI_NOTICE("homescreen-service","called.");
+    if((strcasecmp(verb, "subscribe") && strcasecmp(verb, "unsubscribe")) && !checkEvent(verb))
+        return 0;
+
+    int ret = AFB_EVENT_BAD_REQUEST;
+    auto ip = func_list.find(std::string(verb));
+    if(ip != func_list.end()) {
+        HMI_NOTICE("homescreen-service","[%s]verb found", verb);
+        ret = (this->*(ip->second))(request);
+    }
+    return ret;
+}
\ No newline at end of file
diff --git a/src/hs-client.h b/src/hs-client.h
index b06a717..ac4d004 100644
--- a/src/hs-client.h
+++ b/src/hs-client.h
@@ -18,6 +18,7 @@
 #define HOMESCREEN_CLIENT_H
 
 #include <string>
+#include <unordered_set>
 #include <unordered_map>
 #include "hs-helper.h"
 
@@ -30,25 +31,30 @@ public:
     HS_Client &operator=(HS_Client&) = delete;
     ~HS_Client();
 
-    int tap_shortcut(const char* appid);
-    int showWindow(afb_req_t request, const char* appid);
+    int handleRequest(afb_req_t request, const char *verb);
+
+private:
+    int tap_shortcut(afb_req_t request);
+    int on_screen_message (afb_req_t request);
+    int on_screen_reply (afb_req_t request);
+    int showWindow(afb_req_t request);
     int hideWindow(afb_req_t request);
-    int replyShowWindow(afb_req_t request, const char* appid);
-    int on_screen_message (afb_req_t request, const char* message);
-    int on_screen_reply (afb_req_t request, const char* message);
-    int subscribe(afb_req_t request, const char* event);
-    int unsubscribe(afb_req_t request, const char* event);
+    int replyShowWindow(afb_req_t request);
+    int subscribe(afb_req_t request);
+    int unsubscribe(afb_req_t request);
     int showNotification(afb_req_t request);
     int showInformation(afb_req_t request);
 
-private:
+    typedef int (HS_Client::*func_handler)(afb_req_t);
+    static const std::unordered_map<std::string, func_handler> func_list;
     bool checkEvent(const char* event);
+    bool isSupportEvent(const char* event);
 
 private:
     std::string my_id;
     afb_event_t my_event;
     bool subscription = false;
-    std::unordered_map<std::string, int> event_list;
+    std::unordered_set<std::string> event_list;
 
 };
 
diff --git a/src/hs-clientmanager.cpp b/src/hs-clientmanager.cpp
index 1355c99..7d658e4 100644
--- a/src/hs-clientmanager.cpp
+++ b/src/hs-clientmanager.cpp
@@ -154,312 +154,44 @@ void HS_ClientManager::removeClientCtxt(void *data)
 }
 
 /**
- * tap_shortcut
- *
- * #### Parameters
- *  - request: the request to bindings
- *
- * #### Return
- * result
- *
- */
-int HS_ClientManager::tap_shortcut(afb_req_t request)
-{
-    int ret = 0;
-    const char* value = afb_req_value(request, _application_id);
-    if (value) {
-        HMI_NOTICE("homescreen-service","request params = %s.", value);
-        std::lock_guard<std::mutex> lock(this->mtx);
-        auto ip = client_list.find(std::string(value));
-        if(ip != client_list.end()) {
-            ip->second->tap_shortcut(value);
-        }
-    }
-    else {
-        HMI_NOTICE("homescreen-service","Please input application_id");
-        ret = AFB_EVENT_BAD_REQUEST;
-    }
-    return ret;
-}
-
-/**
- * on_screen_message
- *
- * #### Parameters
- *  - request: the request to bindings
- *
- * #### Return
- * result
- *
- */
-int HS_ClientManager::on_screen_message(afb_req_t request)
-{
-    int ret = 0;
-    const char* value = afb_req_value(request, _display_message);
-    if (value) {
-        HMI_NOTICE("homescreen-service","request params = %s.", value);
-        std::lock_guard<std::mutex> lock(this->mtx);
-        for(auto m : client_list) {
-            m.second->on_screen_message(request, value);
-        }
-    }
-    else {
-        HMI_NOTICE("homescreen-service","Please input display_message");
-        ret = AFB_EVENT_BAD_REQUEST;
-    }
-    return ret;
-}
-
-/**
- * on_screen_reply
- *
- * #### Parameters
- *  - request: the request to bindings
- *
- * #### Return
- * result
- *
- */
-int HS_ClientManager::on_screen_reply(afb_req_t request)
-{
-    int ret = 0;
-    const char* value = afb_req_value(request, _reply_message);
-    if (value) {
-      HMI_NOTICE("homescreen-service","request params = %s.", value);
-      std::lock_guard<std::mutex> lock(this->mtx);
-      for(auto m : client_list) {
-        m.second->on_screen_reply(request, value);
-      }
-    }
-    else {
-        HMI_NOTICE("homescreen-service","Please input reply_message");
-        ret = AFB_EVENT_BAD_REQUEST;
-    }
-    return ret;
-}
-
-/**
- * subscribe
- *
- * #### Parameters
- *  - request: the request to bindings
- *
- * #### Return
- * result
- *
- */
-int HS_ClientManager::subscribe(afb_req_t request)
-{
-    int ret = 0;
-    const char *value = afb_req_value(request, "event");
-    HMI_NOTICE("homescreen-service","value is %s", value);
-    if(value) {
-        std::string appid =std::move(get_application_id(request));
-        if(appid.empty()) {
-            HMI_NOTICE("homescreen-service","can't get application identifier");
-            return AFB_REQ_GETAPPLICATIONID_ERROR;
-        }
-
-        std::lock_guard<std::mutex> lock(this->mtx);
-        HS_Client* client = nullptr;
-        auto ip = client_list.find(appid);
-        if(ip != client_list.end()) {
-            client = client_list[appid];
-        }
-        else {
-            appid2ctxt[appid] = createClientCtxt(request, appid);
-            client = addClient(request, appid);
-        }
-
-        if(client->subscribe(request, value) != 0) {
-            HMI_NOTICE("homescreen-service","subscribe failed");
-            ret = AFB_REQ_SUBSCRIBE_ERROR;
-        }
-    }
-    else {
-        HMI_NOTICE("homescreen-service","Please input event name");
-        ret = AFB_EVENT_BAD_REQUEST;
-    }
-    return ret;
-}
-
-/**
- * unsubscribe
- *
- * #### Parameters
- *  - request: the request to bindings
- *
- * #### Return
- * result
- *
- */
-int HS_ClientManager::unsubscribe(afb_req_t request)
-{
-    const char *value = afb_req_value(request, "event");
-    HMI_NOTICE("homescreen-service","value is %s", value);
-    int ret = 0;
-    if(value) {
-        std::string appid = std::move(get_application_id(request));
-        if(appid.empty()) {
-            HMI_NOTICE("homescreen-service","can't get application identifier");
-            return AFB_REQ_GETAPPLICATIONID_ERROR;
-        }
-
-        std::lock_guard<std::mutex> lock(this->mtx);
-        auto ip = client_list.find(appid);
-        if(ip != client_list.end()
-        && ip->second->unsubscribe(request, value) != 0) {
-            HMI_NOTICE("homescreen-service","unsubscribe failed");
-            ret = AFB_REQ_UNSUBSCRIBE_ERROR;
-        }
-    }
-    else {
-        HMI_NOTICE("homescreen-service","Please input event name");
-        ret = AFB_EVENT_BAD_REQUEST;
-    }
-    return ret;
-}
-
-/**
- * showWindow event
+ * handle homescreen request
  *
  * #### Parameters
  *  - request : the request
+ *  - verb : the verb name
+ *  - appid : to which application
  *
  * #### Return
  * 0 : success
  * others : fail
  *
  */
-int HS_ClientManager::showWindow(afb_req_t request)
+int HS_ClientManager::handleRequest(afb_req_t request, const char *verb, const char *appid)
 {
+    HMI_NOTICE("homescreen-service","verb=[%s],appid=[%s].", verb, appid);
     int ret = 0;
-    const char* value = afb_req_value(request, _application_id);
-    if (value) {
-        HMI_NOTICE("homescreen-service","request params = %s.", value);
-        std::lock_guard<std::mutex> lock(this->mtx);
-        auto ip = client_list.find(std::string(value));
-        if(ip != client_list.end()) {
-            ret = ip->second->showWindow(request, value);
+    std::lock_guard<std::mutex> lock(this->mtx);
+    if(appid == nullptr) {
+        for(auto m : client_list) {
+            m.second->handleRequest(request, verb);
         }
     }
     else {
-        HMI_NOTICE("homescreen-service","Please input application_id");
-        ret = AFB_EVENT_BAD_REQUEST;
-    }
-    return ret;
-}
-
-/**
- * hideWindow event
- *
- * #### Parameters
- *  - request : the request
- *
- * #### Return
- * 0 : success
- * others : fail
- *
- */
-int HS_ClientManager::hideWindow(afb_req_t request)
-{
-    int ret = 0;
-    const char* value = afb_req_value(request, _application_id);
-    if (value) {
-        HMI_NOTICE("homescreen-service","request params = %s.", value);
-        std::lock_guard<std::mutex> lock(this->mtx);
-        auto ip = client_list.find(std::string(value));
+        auto ip = client_list.find(std::string(appid));
         if(ip != client_list.end()) {
-            ret = ip->second->hideWindow(request);
+            ret = ip->second->handleRequest(request, verb);
         }
-    }
-    else {
-        HMI_NOTICE("homescreen-service","Please input application_id");
-        ret = AFB_EVENT_BAD_REQUEST;
-    }
-    return ret;
-}
-
-/**
- * replyShowWindow event
- *
- * #### Parameters
- *  - request : the request
- *
- * #### Return
- * 0 : success
- * others : fail
- *
- */
-int HS_ClientManager::replyShowWindow(afb_req_t request)
-{
-    int ret = 0;
-    const char* value = afb_req_value(request, _application_id);
-    if (value) {
-        HMI_NOTICE("homescreen-service","request params = %s.", value);
-        std::lock_guard<std::mutex> lock(this->mtx);
-        auto ip = client_list.find(std::string(value));
-        if(ip != client_list.end()) {
-            ret = ip->second->replyShowWindow(request, value);
+        else {
+            if(!strcasecmp(verb, "subscribe")) {
+                appid2ctxt[appid] = createClientCtxt(request, appid);
+                HS_Client* client = addClient(request, appid);
+                ret = client->handleRequest(request, "subscribe");
+            }
+            else {
+                HMI_NOTICE("homescreen-service","not exist session");
+                ret = AFB_EVENT_BAD_REQUEST;
+            }
         }
     }
-    else {
-        HMI_NOTICE("homescreen-service","Please input application_id");
-        ret = AFB_EVENT_BAD_REQUEST;
-    }
-    return ret;
-}
-
-/**
- * showNotification event
- *
- * #### Parameters
- *  - request : the request
- *
- * #### Return
- * 0 : success
- * others : fail
- *
- */
-int HS_ClientManager::showNotification(afb_req_t request)
-{
-    int ret = 0;
-    std::lock_guard<std::mutex> lock(this->mtx);
-    auto ip = client_list.find(_homescreen);
-    if(ip != client_list.end()) {
-        ret = ip->second->showNotification(request);
-    }
-    else {
-        HMI_NOTICE("homescreen-service","not exist sessiion with homescreen");
-        ret = AFB_REQ_SHOWNOTIFICATION_ERROR;
-    }
-
     return ret;
-}
-
-/**
- * showInformation event
- *
- * #### Parameters
- *  - request : the request
- *
- * #### Return
- * 0 : success
- * others : fail
- *
- */
-int HS_ClientManager::showInformation(afb_req_t request)
-{
-    int ret = 0;
-    std::lock_guard<std::mutex> lock(this->mtx);
-    auto ip = client_list.find(_homescreen);
-    if(ip != client_list.end()) {
-        ret = ip->second->showInformation(request);
-    }
-    else {
-        HMI_NOTICE("homescreen-service","not exist sessiion with homescreen");
-        ret = AFB_REQ_SHOWINFORMATION_ERROR;
-    }
-
-    return ret;
-}
+}
\ No newline at end of file
diff --git a/src/hs-clientmanager.h b/src/hs-clientmanager.h
index 64ca03c..d485ea8 100644
--- a/src/hs-clientmanager.h
+++ b/src/hs-clientmanager.h
@@ -45,18 +45,8 @@ public:
 
     static HS_ClientManager* instance(void);
     int init(void);
-    void removeClientCtxt(void *data);
-
-    int tap_shortcut(afb_req_t request);
-    int showWindow(afb_req_t request);
-    int hideWindow(afb_req_t request);
-    int replyShowWindow(afb_req_t request);
-    int on_screen_message(afb_req_t request);
-    int on_screen_reply(afb_req_t request);
-    int subscribe(afb_req_t request);
-    int unsubscribe(afb_req_t request);
-    int showNotification(afb_req_t request);
-    int showInformation(afb_req_t request);
+    int handleRequest(afb_req_t request, const char *verb, const char *appid = nullptr);
+    void removeClientCtxt(void *data);  // don't use, internal only
 
 private:
     HS_ClientCtxt* createClientCtxt(afb_req_t req, std::string appid);