Implement Disconnect from Endpoint feature

PiperOrigin-RevId: 421878981

windows/dart/core_adapter_dart.cc

@@ -457,6 +457,18 @@ void AcceptConnectionDart(Core *pCore, const char *endpoint_id,
   AcceptConnection(pCore, endpoint_id, listener, callback);
 }
 
+void DisconnectFromEndpointDart(Core *pCore, char *endpoint_id,
+                                Dart_Port result_cb) {
+  if (!pCore) {
+    PostResult(result_cb, Status::Value::kError);
+    return;
+  }
+
+  ResultCallback callback;
+  SetResultCallback(callback, result_cb);
+  DisconnectFromEndpoint(pCore, endpoint_id, callback);
+}
+
 std::string GetPayloadPath(location::nearby::PayloadId payload_id) {
   PWSTR basePath;
 

windows/dart/core_adapter_dart.h

@@ -174,6 +174,17 @@ DLL_EXPORT void __stdcall RequestConnectionDart(
 DLL_EXPORT void __stdcall AcceptConnectionDart(
     Core *pCore, const char *endpoint_id, PayloadListenerDart listener_dart,
     Dart_Port result_cb);
+
+// Disconnects from a remote endpoint. {@link Payload}s can no longer be sent
+// to or received from the endpoint after this method is called.
+// endpoint_id - The identifier for the remote endpoint to disconnect from.
+// result_cb   - to access the status of the operation when available.
+//   Possible status codes include:
+//     Status::STATUS_OK - finished successfully.
+DLL_EXPORT void __stdcall DisconnectFromEndpointDart(Core *pCore,
+                                                     char *endpoint_id,
+                                                     Dart_Port result_cb);
+
 // Sends a Payload to a remote endpoint. Payloads can only be sent to remote
 // endpoints once a notice of connection acceptance has been delivered via
 // ConnectionListener::onConnectionResult().