function dropTables()

in common.js [311:348]
36 lines of code
8 McCabe index (conditional complexity)

function dropTables(dynamoDB, callback) {
    // drop the config table
    dynamoDB.deleteTable({
        TableName: configTable
    }, function (err, data) {
        if (err && err.code !== 'ResourceNotFoundException') {
            logger.error(err);
            callback(err);
        } else {
            // drop the processed files table
            dynamoDB.deleteTable({
                TableName: filesTable
            }, function (err, data) {
                if (err && err.code !== 'ResourceNotFoundException') {
                    logger.error(err);
                    callback(err);
                } else {
                    // drop the batches table
                    dynamoDB.deleteTable({
                        TableName: batchTable
                    }, function (err, data) {
                        if (err && err.code !== 'ResourceNotFoundException') {
                            logger.error(err);
                            callback(err);
                        }

                        logger.info("All Configuration Tables Dropped");

                        // call the callback requested
                        if (callback) {
                            callback();
                        }
                    });
                }
            });
        }
    });
};