var fs = require('fs'), // needed to read JSON file from disk
	Collection = require('postman-collection').Collection,
    Response = require('postman-collection').Response,
	myCollection;

// Load a collection to memory from a JSON file on disk (say, sample-collection.json)
myCollection = new Collection(JSON.parse(fs.readFileSync('sample-collection.json').toString()));

// iterate through all requests in the collection
myCollection.forEachItem(function (item) {
    // do something with the item
    console.log(item.name);
    // iterate through all responses of the item
    item.responses.each(function (response) {
        // do something with the response
        console.log(response.name);
        // duplicate the response and add it to the item, after changing the name to original name + copy
        duplicateResponse = new Response(response.toJSON());
        duplicateResponse.name = response.name + ' copy';
        item.responses.add(duplicateResponse);
    });
});

// save the collection back to disk
fs.writeFileSync('sample-collection-modified.json', JSON.stringify(myCollection.toJSON()));



// log items at root level of the collection
//console.log(myCollection.toJSON());