npmsearchplugin/lib/npm.js

Search the NPM Database remotely

var findInBatches = require('find-in-batches');
var request = require('request');
var cheerio = require('cheerio');

class NPMSearchPlugin {

    static findNPM(query, options, callback) {
        if (arguments.length === 2) {
            callback = options
            options = {}
        }

        query = (query || '').trim();

        if (!query) return callback(null, []);

        var opts = {
            batchSize: 20,
            maximum: 20
        };

        if (options.limit) opts.maximum = options.limit;

        var modules = [];
        findInBatches.each(opts, function find(options, callback) {
            this.search(query, options, callback);
        }, function each(m, done) {
            modules.push(m);
            done();
        }, function (err) {
            if (err) return callback(err);
            callback(null, modules);
        })
    }

    static search(query, options, callback) {
        var page = options.page || 1;
        return request({
            method: 'get',
            url: 'https://www.npmjs.com/search?page=' + page + '&q=' + query
        }, function (err, res, body) {
            if (err) return callback(err);
            var $ = cheerio.load(body);
            var modules = [];
            $('.package-details').each(function () {
                modules.push({
                    name: $(this).find('.packageName').text(),
                    version: $(this).find('.version').text(),
                    author: $(this).find('.authorName').text(),
                    description: $(this).find('.description').text()
                })
            })
            callback(null, modules);
        })
    }
}
module.exports = NPMSearchPlugin;