Extending one AngularJS service by another service, modifying input parameters and response.

service.js

myApp.factory('couchService', function (basicCouchService) {
    return {
        get: function(listType, response) {
            // Convert the input parameters to the schema-names used inside CouchDB
            var couchSchema = (listType.listType === 'latest') ? 'by_submit' : 'by_duration';
            basicCouchService.get({listType: couchSchema}, function (localResponse) {
                // Get the top-10, assume the array is already ordered wrong way around.
                var rowList = localResponse.rows;
                rowList = rowList.slice(rowList.length - 10, rowList.length);
                localResponse.rows = rowList;
                response(localResponse);
            });
        }
    };
});

myApp.factory('basicCouchService', function ($resource, $http, Base64) {
    return $resource('/mydb/_view/:listType',{
        listType: '@listType'
    }, {
        get: {
            method: 'GET',
            isArray: false,
            headers: {'Authorization': 'Basic ' +
                Base64.encode('username' + ':' + 'password')}
        }
    });
});