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'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _lodash = require('lodash');
var _lodash2 = _interopRequireDefault(_lodash);
var _stringWidth = require('string-width');
var _stringWidth2 = _interopRequireDefault(_stringWidth);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const alignments = ['left', 'right', 'center'];
/**
* @param {string} subject
* @param {number} width
* @returns {string}
*/
const alignLeft = (subject, width) => {
return subject + _lodash2.default.repeat(' ', width);
};
/**
* @param {string} subject
* @param {number} width
* @returns {string}
*/
const alignRight = (subject, width) => {
return _lodash2.default.repeat(' ', width) + subject;
};
/**
* @param {string} subject
* @param {number} width
* @returns {string}
*/
const alignCenter = (subject, width) => {
let halfWidth;
halfWidth = width / 2;
if (halfWidth % 2 === 0) {
return _lodash2.default.repeat(' ', halfWidth) + subject + _lodash2.default.repeat(' ', halfWidth);
} else {
halfWidth = _lodash2.default.floor(halfWidth);
return _lodash2.default.repeat(' ', halfWidth) + subject + _lodash2.default.repeat(' ', halfWidth + 1);
}
};
/**
* Pads a string to the left and/or right to position the subject
* text in a desired alignment within a container.
*
* @param {string} subject
* @param {number} containerWidth
* @param {string} alignment One of the valid options (left, right, center).
* @returns {string}
*/
exports.default = (subject, containerWidth, alignment) => {
if (!_lodash2.default.isString(subject)) {
throw new TypeError('Subject parameter value must be a string.');
}
if (!_lodash2.default.isNumber(containerWidth)) {
throw new TypeError('Container width parameter value must be a number.');
}
const subjectWidth = (0, _stringWidth2.default)(subject);
if (subjectWidth > containerWidth) {
// console.log('subjectWidth', subjectWidth, 'containerWidth', containerWidth, 'subject', subject);
throw new Error('Subject parameter value width cannot be greater than the container width.');
}
if (!_lodash2.default.isString(alignment)) {
throw new TypeError('Alignment parameter value must be a string.');
}
if (alignments.indexOf(alignment) === -1) {
throw new Error('Alignment parameter value must be a known alignment parameter value (left, right, center).');
}
if (subjectWidth === 0) {
return _lodash2.default.repeat(' ', containerWidth);
}
const availableWidth = containerWidth - subjectWidth;
if (alignment === 'left') {
return alignLeft(subject, availableWidth);
}
if (alignment === 'right') {
return alignRight(subject, availableWidth);
}
return alignCenter(subject, availableWidth);
};
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