Write a module for prestashop

Hi, i need a module to sincronize a catalog from another site. This is for dropshipping and need to sincrozize the catalog from other site in my site but in specify category. The module must do: Syncrozize the catalog with CRON or manualy. Select which category i want syncronize. Select in which category of the shop i want put the category. I have the API, this is in italian language but i will traslate it in english.