Wordpress Plugin to return information about offers associated with some categories

Very Easy job Wordpress Plugin to return information about offers associated with some categories in json format We need to 1- UI to add some information name, description , select categories 2- return offer name, offer description and offer attached wp categories in json format via url. 1- After plugin install, you open it from the left admin menu. You can add new offer. When click add , you can add the offer name, offer description and select categories from the wordpress current categories. 2- Then by requesting plugin exposed url for example: [login to view URL] You return all information we added before in requirements#1 in json format like that { "code":"100", "message":"Succeeded", "data": [ { "id":40, "name":"Watches", "slug":"watches", "parent":0, "description":"", "display":"default", "image":"", "count":72, "sort":2, "level":1, "sort_id":2, "display_parent":0 }, { "id":39, "name":"Mobiles", "slug":"mobiles", "parent":0, "description":"", "display":"default", "image":"[login to view URL]", "count":1, "sort":3, "level":1, "sort_id":3, "display_parent":0 } ] } If there is any error return different error code and message { "code":"-110", "message":" Error getting data", "data":”” }