add NFStatusUnSubscribe operation

src/api-server/impl/SubscriptionIDDocumentApiImpl.cpp

 /**
  * NRF NFManagement Service
- * NRF NFManagement Service. © 2019, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). All rights reserved.
+ * NRF NFManagement Service. © 2019, 3GPP Organizational Partners (ARIB, ATIS,
+ * CCSA, ETSI, TSDSI, TTA, TTC). All rights reserved.
  *
  * The version of the OpenAPI document: 1.1.0.alpha-1
  *
  *
- * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
- * https://openapi-generator.tech
- * Do not edit the class manually.
+ * NOTE: This class is auto generated by OpenAPI Generator
+ * (https://openapi-generator.tech). https://openapi-generator.tech Do not edit
+ * the class manually.
  */
 
 #include "SubscriptionIDDocumentApiImpl.h"
+#include "3gpp_29.500.h"
 
 namespace oai {
 namespace nrf {
@@ -22,16 +24,37 @@ using namespace oai::nrf::app;
 SubscriptionIDDocumentApiImpl::SubscriptionIDDocumentApiImpl(
     std::shared_ptr<Pistache::Rest::Router> rtr, nrf_app *nrf_app_inst,
     std::string address)
-    :
-    SubscriptionIDDocumentApi(rtr),
-    m_nrf_app(nrf_app_inst),
-    m_address(address) {
-}
+    : SubscriptionIDDocumentApi(rtr),
+      m_nrf_app(nrf_app_inst),
+      m_address(address) {}
 
 void SubscriptionIDDocumentApiImpl::remove_subscription(
     const std::string &subscriptionID,
     Pistache::Http::ResponseWriter &response) {
-  response.send(Pistache::Http::Code::Ok, "Do some magic\n");
+  Logger::nrf_sbi().info(
+      "Got a request to remove an existing subscription, subscription ID %s",
+      subscriptionID.c_str());
+
+  int http_code = 0;
+  ProblemDetails problem_details = {};
+  m_nrf_app->handle_remove_subscription(subscriptionID, http_code, 1, problem_details);
+
+  nlohmann::json json_data = {};
+  std::string content_type = "application/json";
+
+  if (http_code != HTTP_STATUS_CODE_204_NO_CONTENT) {
+    to_json(json_data, problem_details);
+    content_type = "application/problem+json";
+    // content type
+    response.headers().add<Pistache::Http::Header::ContentType>(
+        Pistache::Http::Mime::MediaType(content_type));
+    response.send(Pistache::Http::Code(http_code), json_data.dump().c_str());
+  } else {
+    // content type
+    response.headers().add<Pistache::Http::Header::ContentType>(
+        Pistache::Http::Mime::MediaType(content_type));
+    response.send(Pistache::Http::Code(http_code));
+  }
 }
 void SubscriptionIDDocumentApiImpl::update_subscription(
     const std::string &subscriptionID, const std::vector<PatchItem> &patchItem,
@@ -39,7 +62,6 @@ void SubscriptionIDDocumentApiImpl::update_subscription(
   response.send(Pistache::Http::Code::Ok, "Do some magic\n");
 }
 
-}
-}
-}
-
+}  // namespace api
+}  // namespace nrf
+}  // namespace oai

src/nrf_app/nrf_app.hpp

@@ -129,6 +129,7 @@ class nrf_app {
   /*
    * Handle a Register NF Instance request
    * @param [SubscriptionData &] subscription_data: Subscription data
+   * @param [std::string &] sub_id: Subscription ID
    * @param [int &] http_code: HTTP code used to return to the consumer
    * @param [const uint8_t] http_version: HTTP version
    * @param [ProblemDetails &] problem_details: Store details of the error
@@ -139,6 +140,17 @@ class nrf_app {
                                   const uint8_t http_version,
                                   ProblemDetails &problem_details);
 
+  /*
+   * Handle a NFStatusUnSubscribe request (removes an existing subscription)
+   * @param [const std::string &] sub_id: Subscription ID
+   * @param [int &] http_code: HTTP code used to return to the consumer
+   * @param [const uint8_t] http_version: HTTP version
+   * @param [ProblemDetails &] problem_details: Store details of the error
+   * @return void
+   */
+  void handle_remove_subscription(const std::string &sub_id, int &http_code,
+                                  const uint8_t http_version,
+                                  ProblemDetails &problem_details);
   /*
    * Insert a nrf profile
    * @param [const std::string &] profile_id: Profile ID
@@ -214,6 +226,12 @@ class nrf_app {
   bool add_subscription(const std::string &sub_id,
                         const std::shared_ptr<nrf_subscription> &s);
 
+  /*
+   * Remove a subscription from the list
+   * @param [std::string &] sub_id: ID of the subscription to be removed
+   * @return true if successful, otherwise, return false
+   */
+  bool remove_subscription(const std::string &sub_id);
   /*
    * Subscribe to the task tick event
    * @param [uint64_t &] ms: Current time in ms