Example chunk C++ for sending an action via Weave

Exampl-chunk-Libweave.cpp

[...]
/**
 * Google Weave example by @bobvanluijt
 * This example shows the private function 'OnBobCommand' which is proccesed when the deamon receives a request
 */
private:
  void OnBobsCommand(const std::weak_ptr<weave::Command>& command) {
    /**
     * Chunk: processing the received command
     */
    auto cmd = command.lock();
    if (!cmd)
      return;
    LOG(INFO) << "received command: " << cmd->GetName(); // output the received command
    /**
     * Chunk: processing the 'name' param
     */
    const auto& params = cmd->GetParameters(); // get the params
    std::string name; // get the string 'name'
    /**
     * Chunk: handling error if param is not found
     */
    if (!params.GetString("name", &name)) { // 'no name' is set, abort
      weave::ErrorPtr error;
      weave::Error::AddTo(&error, FROM_HERE, "invalid_parameter_value", "Name is missing");
      cmd->Abort(error.get(), nullptr);
      return;
    }
    /**
     * Chunk: processing device action
     */
    base::DictionaryValue result;
    result.SetString("reply", "Hello " + name); // output 'Hello Bob' 
    cmd->Complete(result, nullptr);
    /**
     * Chunk: process logging
     */
    LOG(INFO) << cmd->GetName() << " command finished: " << result; // create log
  }
 /**
  * Chunk: process device state
  */
  weave::Device* device_{nullptr};
  weave::provider::TaskRunner* task_runner_{nullptr};
  base::WeakPtrFactory<SampleHandler> weak_ptr_factory_{this};
};
[...]