feat(api): Add send_mam_message API

Author: Yu Wei Wu

accelerator/server.cc

@@ -79,6 +79,36 @@ int main(int, char const**) {
         res << json_result;
       });
 
+  mux.handle("/mam")
+      .method(served::method::OPTIONS,
+              [&](served::response& res, const served::request& req) {
+                set_method_header(res, HTTP_METHOD_OPTIONS);
+              })
+      .post([&](served::response& res, const served::request& req) {
+        status_t ret = SC_OK;
+        char* json_result;
+        char* chid_result;
+
+        if (req.header("content-type").find("application/json") ==
+            std::string::npos) {
+          cJSON* json_obj = cJSON_CreateObject();
+          cJSON_AddStringToObject(json_obj, "message",
+                                  "Invalid request header");
+          json_result = cJSON_PrintUnformatted(json_obj);
+
+          res.set_status(SC_HTTP_BAD_REQUEST);
+          cJSON_Delete(json_obj);
+        } else {
+          api_mam_send_message(&ta_core.tangle, &ta_core.service,
+                               req.body().c_str(), &json_result, &chid_result);
+          ret = set_response_content(ret, &json_result);
+          res.set_status(ret);
+        }
+
+        set_method_header(res, HTTP_METHOD_POST);
+        res << json_result;
+      });
+
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