BPMN - Business Process Model and Notation in Yii 2

Hi,

I’m planning to build workflow system that implements BPMN using Yii.

I don’t want to build tool to create diagrams - I’ve got that already.

I don’t even where to start.

Does anyone heard of such?

I would be grateful for any tips.

Could you elaborate about workflow system? BPMN is a notation to visaulize the process. Do you want to generate code from it?