feat(smf): Add getFirstFlowDescription function in PCCRule

Signed-off-by: Stefan Spettel <stefan.spettel@eurecom.fr>

src/api-server/model/PccRule.cpp

@@ -732,6 +732,16 @@ void PccRule::unsetTscaiInputUl() {
 }
 */
 
+std::string PccRule::getFirstFlowDescription() const {
+  std::string flow = "";
+  if (flowInfosIsSet() && getFlowInfos().size() > 0) {
+    if (getFlowInfos()[0].flowDescriptionIsSet()) {
+      flow = getFlowInfos()[0].getFlowDescription();
+    }
+  }
+  return flow;
+}
+
 }  // namespace model
 }  // namespace smf_server
 }  // namespace oai

src/api-server/model/PccRule.h

@@ -210,6 +210,8 @@ class PccRule {
   void unsetTscaiInputUl();
   */
 
+  std::string getFirstFlowDescription() const;
+
   friend void to_json(nlohmann::json& j, const PccRule& o);
   friend void from_json(const nlohmann::json& j, PccRule& o);