C++ arduino function to parse json

i have other code written to call an API and need a function written that will parse out json and call another function with the json data as parameters. input string example: {"commands":5,"data":[{"id":2,"code":6,"cid":3,"data":100},{"id":3,"code":5,"cid":3,"data":0},{"id":4,"code":6,"cid":4,"data":0},{"id":5,"code":6,"cid":4,"data":0},{"id":6,"code":6,"cid":5,"data":0}]} your function will iterate through each data and call another function which i've written: runCommand(int id, int code, int cid, int data). for example with the above sample string it will call runCommand(2,6,3,100) - wait for the function to end - then call runCommand(3,5,3,0), and so on. also account for the possibility of no data, string example: {"commands":0,"data":[]}