JS Chaining Promises

promise-chain.js

function myFunc(things, stuff){

    return new Promise( (resolve,reject) =>{ // setup
        var result = [];
        resolve(result);

    }).then( (result) =>{ // Action 1

        return new Promise( (resolve,reject) =>{
            myFirstFunction(things,stuff)
                .then(response => resolve(response))
                .catch(err => resolve([])); // nothing yet so return empty results array
        })

    }).then( (results) =>{ // Action 2

        return new Promise( (resolve,reject) =>{
            mySecondFunction(things,stuff){
                .then(response =>{
                    results = results.concat(response)
                    return resolve(results);
                })
                .catch(err => resolve(results)); // nothing new so just return existing results
            }

        });

    }).then( (results) =>{ // Action 3

        return new Promise( (resolve,reject) =>{
            myThirdFunction(things,stuff)
                .then(response =>{
                    results = results.concat(response)
                    return resolve(results);
                })
                .catch(err => resolve(results)); // nothing new so just return existing results
        })

    }).then( (results) =>{ // Finalise response
        return new Promise( (resolve,reject) =>{
            if (results.length == 0){
                return reject('nothing_found');
            }else{
                return resolve(results);
            }
        })
    });

}