Product search by PREG template

http://crm.mebelok.com/ There is an automatic action Turn a letter into a process, it has the ability to search for products using the PREG template, that is, it finds products and adds them to the process. We need to do a similar action in the process, in which we will set the PREG template and use it so that the system looks for products and adds them to the process. 1. To be able to search for which field (article, external id, id in the box) 2. Indicate exactly where to look, with a description of the process, from the commentary feed, with additional. process fields 3. Add a condition, do not add a product to the process depending on the condition and add conditions