function getS3NotificationConfiguration()

in common.js [457:490]
32 lines of code
12 McCabe index (conditional complexity)

function getS3NotificationConfiguration(s3, bucket, prefix, functionArn, callback) {
    var params = {
        Bucket: bucket
    };
    s3.getBucketNotificationConfiguration(params, function (err, data) {
        if (err) {
            callback(err);
        } else {
            // have to iterate through all the function configurations
            if (data.LambdaFunctionConfigurations && data.LambdaFunctionConfigurations.length > 0) {
                var matchConfigId;
                data.LambdaFunctionConfigurations.map(function (item) {
                    if (item && item.Filter && item.Filter.Key && item.Filter.Key.FilterRules) {
                        item.Filter.Key.FilterRules.map(function (filter) {
                            if (filter.Name === 'Prefix' && filter.Value === prefix) {
                                if (item.LambdaFunctionArn === functionArn) {
                                    matchConfigId = item.Id;
                                }
                            }
                        });
                    }
                });

                if (matchConfigId) {
                    callback(undefined, matchConfigId, data);
                } else {
                    callback(undefined, undefined, data);
                }
            } else {
                callback();
            }
        }
    });
};