You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
2.9 KiB
JavaScript
89 lines
2.9 KiB
JavaScript
'use strict';
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var inquirer = require('inquirer');
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var chalk = require('chalk');
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var getContents = require('../lib/fileio').getContents;
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exports.narrowDown = narrowDown;
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exports.selectArticle = selectArticle;
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function narrowDown(articles, terms, deep, apropos, doFallback, englishArticles) {
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var reSearchTerms = terms.map(function mapRE(term) {
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// escape invalid regex characters in the search terms before making a new regex
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return new RegExp(term.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, '\\$&'), 'i');
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});
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var filtered;
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if (doFallback) {
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filtered = englishArticles.slice();
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} else {
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filtered = articles.slice();
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}
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if (apropos) {
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filtered = filtered.map(function getArticleContents(art) {
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return getContents(art).then(function makeArts(article) {
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return article;
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});
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});
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return Promise.all(filtered).then(function filterIt(items) {
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return items.filter(function filterOnTitleContents(article) {
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return reSearchTerms.every(function checkRE(reTerm) {
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return reTerm.test(article.title) || reTerm.test(article.contents);
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});
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});
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});
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} else if (deep) {
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return filtered.filter(function filterOnTitleDesc(article) {
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return reSearchTerms.every(function checkRE(reTerm) {
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return reTerm.test(article.title) || reTerm.test(article.description);
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});
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});
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} else {
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return filtered.filter(function filterOnTitle(article) {
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return reSearchTerms.every(function checkRE(reTerm) {
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return reTerm.test(article.title);
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});
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});
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}
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}
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function selectArticle(articles, lang, searchTerms, isDeep, isApro, englishArticles) {
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return new Promise(function makePromise(resolve, reject) {
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var len = articles.length;
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var choices;
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var sorted = articles.sort(function sortSpecialLast(a, b) {
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return b.lastrevid - a.lastrevid;
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});
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var tWidth = (/chinese|korean|japanese/gi.test(lang)) ? 40 : 80;
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if (len === 0) {
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if (lang === 'english') {
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return reject('No articles match your query.');
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} else {
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return resolve(selectArticle(narrowDown(null, searchTerms, isDeep, isApro, true, englishArticles), 'english'));
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}
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} else if (len === 1) {
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return resolve(sorted[0]);
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} else {
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choices = sorted.map(function makeChoices(article, index) {
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var entry = ['[', chalk.yellow(index + 1), '/', chalk.yellow(len), '] ', chalk.green(article.title), ': ', chalk.gray(article.description.substr(0, tWidth))].join('').replace(/\\?\n/g, '');
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return (article.description.length + article.title.length < tWidth) ? entry : entry + chalk.gray('..');
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});
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inquirer.prompt([{
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type: 'list',
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name: 'selection',
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message: 'Select an article:',
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choices: choices,
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}], function getAnswer(response) {
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var pos = choices.indexOf(response.selection);
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return resolve(sorted[pos]);
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});
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}
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});
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}
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