Using Request Network Selection Mode API

Please follow below steps to request network selection mode

1. Get phone factory and network selection manager instances

auto &phoneFactory = telux::tel::PhoneFactory::getInstance();
auto networkMgr
   = phoneFactory.getNetworkSelectionManager(DEFAULT_SLOT_ID);

### 2. Wait for the network selection subsystem initialization ###

bool subSystemStatus = networkMgr->isSubsystemReady();

### 2.1 If network selection subsystem is not ready, wait for it to be ready ###

if(!subSystemStatus) {
   std::cout << "network selection subsystem is not ready" << std::endl;
   std::cout << "wait unconditionally for it to be ready " << std::endl;
   std::future<bool> f = networkMgr->onSubsystemReady();
   // If we want to wait unconditionally for network selection subsystem to be ready
   subSystemStatus = f.get();
}

### 3. Exit the application, if SDK is unable to initialize network selection subsystem ###

if(subSystemsStatus) {
   std::cout << " *** Network selection subsystem ready *** " << std::endl;
} else {
   std::cout << " *** ERROR - Unable to initialize network selection subsystem" << std::endl;
   return 1;
}

4. Implement response callback to receive response for request network selection mode

class SelectionModeResponseCallback {
public:
   void selectionModeResponse(
      telux::tel::NetworkSelectionMode networkSelectionMode,
      telux::common::ErrorCode errorCode) {
      if(errorCode == telux::common::ErrorCode::SUCCESS) {
         std::cout << "Network selection mode: "
                   << static_cast<int>(networkSelectionMode)
                   << std::endl;
      } else {
         std::cout << "\n requestNetworkSelectionMode failed, ErrorCode: "
                   << static_cast<int>(errorCode)
                   << std::endl;
      }
   }
};

5. Send requestNetworkSelectionMode along with required function object

if(networkMgr) {
   auto status = networkMgr->requestNetworkSelectionMode(
      SelectionModeResponseCallback::selectionModeResponse);
   std::cout << static_cast<int>(status) <<std::endl;
   }
}

6. Receive callback for get network selection mode request in selectionModeResponse function