Developing Chrome Extension

Creating a chrome bookmark extension likes chrome's bookmark icon - when visiting a page -- 1 -> looks this page is bookmarked (rest web servis connection) ---- input: {url:string} ---- output: state of bookmark -> {bookmarked:boolean, partial:boolean,category:{id:string, name:string}} - when bookmarkin a page -- 1 -> fetch bookmark categories ---- input: {} ---- output: state of bookmark -> {bookmarked:boolean, partial:boolean,category: -- 2 -> bookmark current page ---- input: {url:string, category:{id:string}, user:string} ---- output: result of operation -> {completed:boolean}