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/*
* mongo-edu
*
* Copyright (c) 2014 Przemyslaw Pluta
* Licensed under the MIT license.
* https://github.com/przemyslawpluta/mongo-edu/blob/master/LICENSE
*/
var request = require('request'),
cheerio = require('cheerio'),
ProgressBar = require('progress'),
_ = require('lodash');
var jar = request.jar(), host = 'https://education.mongodb.com';
function addCookies(cookies, url) {
_.each(cookies, function cookies(cookie) { jar.setCookie(cookie, url + '/login'); });
}
module.exports = {
init: function init(opt, argv, callback) {
var url = host,
bar = new ProgressBar('[' + '>'.magenta + '] Searching [:bar] :percent', { complete: '=', incomplete: ' ', width: 20, total: 5 }),
CSRFTokenCookie = '',
login = function login(token) {
request({
uri: url + '/login',
method: 'POST',
jar: jar,
headers: { 'X-CSRFToken': token[0].split('=')[1] },
form: { 'email': opt.user, 'password': opt.password }
}, function post(err, res, body) {
if (err !== null) { return callback(err, null); }
if (res.statusCode === 200) {
var status = JSON.parse(body);
if (status.success !== true) { return callback(new Error(status.value)); }
bar.tick();
return checkCourses(bar);
}
callback(new Error(res.statusCode));
});
},
checkCourses = function checkCourses(bar) {
bar.tick();
request({ url: url + '/dashboard', jar: jar }, function get(err, res, body) {
if (err !== null) { return callback(err, null); }
bar.tick();
if (res.statusCode === 200) {
var list = [], getCourses = [], $ = cheerio.load(body),
current = $('article.my-course.panel').children(),
link = $(current).children().filter('.span-7.offset-1').children().find('h3').children();
bar.tick();
$(link).each(function each(i, item) {
list.push({ name: $(item).text(), value: url + $(item).attr('href').replace(/about|info|syllabus/g, '') + ((!argv.h) ? 'course_wiki' : 'syllabus') });
});
bar.tick();
callback(null, list);
}
});
};
request(url, function (err, res, body) {
if (err !== null) { return callback(err, null); }
if (res.statusCode === 200) {
addCookies(res.headers['set-cookie'], url);
CSRFTokenCookie = res.headers['set-cookie'][0].split(';');
return login(CSRFTokenCookie);
}
callback(new Error(res.statusCode));
});
},
getList: function getList(opt, argv, callback) {
request({ url: opt.url, jar: jar }, function get(err, res, body) {
if (err !== null) { return callback(err, null); }
if (res.statusCode === 200) {
var list = [], getCourses = [], $ = cheerio.load(body), tag = opt.url.replace('course_', ''), options = (!argv.h)? 'Video' : 'Handout';
if (!argv.h) {
$('div.wiki-article p').children().filter('a').map(function map(i, item) {
var current = $(item);
if (current.text().indexOf(options) !== -1) {
list.push({ href: current.attr('href'), text: current.text() });
}
});
getCourses = _.filter(list, function map(item) {
if (item.href.match(/(wiki\/M101|wiki\/M102|wiki\/C100|wiki\/M202|wiki\/list-youtube-links)/)) { return item; }
});
return callback(null, _.map(getCourses, function map(item) { return { name: !item.href.match(/wiki\/list-youtube-links/) ? item.href.replace(tag, '').slice(0, -1).slice(1).replace(/-/g, ' ').replace(/\//g, ': ') : item.text, value: item.href }; }));
} else {
$('div.syllabus tbody tr').map(function map(i, item) {
var current = $(item), text = current.children().first().text(), href = $(current.find('a')).attr('href');
if (href) {
list.push({ name: text, value: host + $(current.find('a')).attr('href') });
}
});
if (list.length) { list.unshift({name: 'All', value: 'all', checked: true}, {name: 'Cancel', value: 'cancel'}); }
return callback(null, list, true);
}
}
});
},
listVideos: function listVideos(opt, callback) {
var videos = [], state = false, list, $, current;
request({ url: opt.url, jar: jar }, function get(err, res, body) {
if (err !== null) { return callback(err, null); }
if (res.statusCode === 200) {
$ = cheerio.load(body);
list = $('div.wiki-article');
current = list.find('code').text();
if ((current.indexOf('http://') !== -1) || (current.indexOf('https://') !== -1)) {
videos = _.compact(current.split('\n'));
}
if (!videos.length) {
list.children('p').children().each(function each(i, item) {
var current = $(item);
if (current.attr('href')) {
videos.push({ name: current.text().split('-')[0], value: current.attr('href') });
}
});
if (videos.length) { videos.unshift({name: 'All', value: 'all', checked: true}, {name: 'Cancel', value: 'cancel'}); }
state = true;
}
return callback(null, videos, state);
}
callback(new Error(res.statusCode));
});
}
};
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