throw error on invalid id name

.gitignore

@@ -11,3 +11,4 @@ scripts/cleanup.sh
 support/Dockerfile
 version.cpp
 version.rc
+monitarr.json

monitarr/libmonitarr/src/actions.cpp

@@ -164,6 +164,11 @@ auto load_config(std::string &cfg_file) -> app_config {
     cfg.save(cfg_file);
   }
 
+  if (cfg.server_list.empty()) {
+    return cfg;
+  }
+
+  {
     auto iter = std::ranges::adjacent_find(
         cfg.server_list,
         [](auto &&srv1, auto &&srv2) -> bool { return srv1.id == srv2.id; });
@@ -174,6 +179,26 @@ auto load_config(std::string &cfg_file) -> app_config {
                                                iter->id,
                                            });
     }
+  }
+
+  {
+    constexpr const auto id_names{
+        std::array<std::string_view, 3U>{"lidarr", "radarr", "sonarr"},
+    };
+
+    auto iter = std::ranges::find_first_of(
+        cfg.server_list, id_names, [](auto &&data, auto &&name) -> bool {
+          return utils::string::contains(data.id, name);
+        });
+    if (iter == cfg.server_list.end()) {
+      throw utils::error::create_exception(
+          function_name,
+          {
+              "server id must contain one of the following values",
+              fmt::format("{}", id_names),
+          });
+    }
+  }
 
   return cfg;
 }