--- /dev/null
+import cloneDeep from 'lodash.clonedeep';
+import getBorderCharacters from './getBorderCharacters';
+import validateConfig from './validateConfig';
+
+/**
+ * Merges user provided border characters with the default border ("honeywell") characters.
+ *
+ * @param {object} border
+ * @returns {object}
+ */
+const makeBorder = (border = {}) => {
+ return Object.assign({}, getBorderCharacters('honeywell'), border);
+};
+
+/**
+ * Creates a configuration for every column using default
+ * values for the missing configuration properties.
+ *
+ * @param {number} columnCount
+ * @param {object} columns
+ * @param {object} columnDefault
+ * @returns {object}
+ */
+const makeColumns = (columnCount, columns = {}, columnDefault = {}) => {
+ for (let index = 0; index < columnCount; index++) {
+ if (typeof columns[index] === 'undefined') {
+ columns[index] = {};
+ }
+
+ columns[index] = Object.assign({
+ alignment: 'left',
+ paddingLeft: 1,
+ paddingRight: 1,
+ truncate: Number.POSITIVE_INFINITY,
+ wrapWord: false,
+ }, columnDefault, columns[index]);
+ }
+
+ return columns;
+};
+
+/**
+ * @typedef {object} columnConfig
+ * @property {string} alignment
+ * @property {number} width
+ * @property {number} truncate
+ * @property {number} paddingLeft
+ * @property {number} paddingRight
+ */
+
+/**
+ * @typedef {object} streamConfig
+ * @property {columnConfig} columnDefault
+ * @property {object} border
+ * @property {columnConfig[]}
+ * @property {number} columnCount Number of columns in the table (required).
+ */
+
+/**
+ * Makes a new configuration object out of the userConfig object
+ * using default values for the missing configuration properties.
+ *
+ * @param {streamConfig} userConfig
+ * @returns {object}
+ */
+export default (userConfig = {}) => {
+ validateConfig('streamConfig.json', userConfig);
+
+ const config = cloneDeep(userConfig);
+
+ if (!config.columnDefault || !config.columnDefault.width) {
+ throw new Error('Must provide config.columnDefault.width when creating a stream.');
+ }
+
+ if (!config.columnCount) {
+ throw new Error('Must provide config.columnCount.');
+ }
+
+ config.border = makeBorder(config.border);
+ config.columns = makeColumns(config.columnCount, config.columns, config.columnDefault);
+
+ return config;
+};