refactor

repertory/repertory/src/ui/handlers.cpp

@@ -26,6 +26,7 @@
 #include "rpc/common.hpp"
 #include "types/repertory.hpp"
 #include "ui/mgmt_app_config.hpp"
+#include "utils/common.hpp"
 #include "utils/error_utils.hpp"
 #include "utils/file.hpp"
 #include "utils/path.hpp"
@@ -112,8 +113,6 @@ handlers::handlers(mgmt_app_config *config, httplib::Server *server)
     handle_put_set_value_by_name(req, res);
   });
 
-  event_system::instance().start();
-
   static std::atomic<httplib::Server *> this_server{server_};
   static const auto quit_handler = [](int /* sig */) {
     auto *ptr = this_server.load();
@@ -144,6 +143,21 @@ handlers::handlers(mgmt_app_config *config, httplib::Server *server)
   build fails here
 #endif
 
+  std::uint16_t port{};
+  if (not utils::get_next_available_port(config_->get_api_port(), port)) {
+    fmt::println("failed to detect if port is available|{}",
+                 config_->get_api_port());
+    return;
+  }
+
+  if (port != config_->get_api_port()) {
+    fmt::println("failed to listen on port|{}|next available|{}",
+                 config_->get_api_port(), port);
+    return;
+  }
+
+  event_system::instance().start();
+
   server_->listen("127.0.0.1", config_->get_api_port());
   this_server = nullptr;
 }