roc/lib/helpers/get-suggestions.js

Build modern web applications easily

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.default = getSuggestions;

var _leven = require('leven');

var _leven2 = _interopRequireDefault(_leven);

var _chalk = require('chalk');

var _chalk2 = _interopRequireDefault(_chalk);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Will create a string with suggestions for possible typos.
 *
 * @param {string[]} current - The current values that might be incorrect.
 * @param {string[]} possible - All the possible correct values.
 * @param {string} [prefix=''] - Something that the suggestion should be prefixed with. Useful for CLI options.
 *
 * @returns {string} - A string with possible suggestions for typos.
 */
function getSuggestions(current, possible) {
    let prefix = arguments.length <= 2 || arguments[2] === undefined ? '' : arguments[2];

    const info = [];

    current.forEach(currentKey => {
        let shortest = 0;
        let closest;

        for (let key of possible) {
            let distance = (0, _leven2.default)(currentKey, key);

            if (distance <= 0 || distance > 4) {
                continue;
            }

            if (shortest && distance >= shortest) {
                continue;
            }

            closest = key;
            shortest = distance;
        }

        if (closest) {
            info.push('Did not understand ' + _chalk2.default.underline(prefix + currentKey) + ' - Did you mean ' + _chalk2.default.underline(prefix + closest));
        } else {
            info.push('Did not understand ' + _chalk2.default.underline(prefix + currentKey));
        }
    });

    return info.join('\n');
}
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