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edgar-monitor.js
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edgar-monitor.js
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var request = require('request'),
fs = require('fs'),
exec = require('child_process').exec,
Diff2Html = require('diff2html').Diff2Html,
pg = require('pg'),
cheerio = require('cheerio'),
uuid = require('node-uuid'),
aws = require('aws-sdk'),
s3 = new aws.S3({ apiVersion: '2006-03-01', 'region': 'us-east-1' }),
ses = new aws.SES({ apiVersion: '2010-12-01', 'region': 'us-east-1' });
function handleError(err) {
if (err) {
var timeStamp = (new Date()).toString();
console.log(timeStamp, ' Error:');
console.log(err);
console.log('-------');
process.exit(1);
}
}
var EdgarMonitor = module.exports = function(emitter, config) {
if (config.maxDatabaseConnections) {
pg.defaults.poolSize = config.maxDatabaseConnections;
}
emitter.on('new-entry', function(entry, feed) {
var entryType = typeFromTitle(entry.title);
if (config.diffAndNotifyAboutFilingTypes.indexOf(entryType) != -1) {
diffEntry(entry, feed, config, function(err, diffLink) {
handleError(err);
notifyEntry(entry, feed, config, diffLink);
});
} else if (config.notifyAboutFilingTypes.indexOf(entryType) != -1) {
notifyEntry(entry, feed, config);
}
});
}
function notifyEntry(entry, feed, config, extraResource) {
var subject = entry.meta.title + ': ' + entry.title;
var bodyText = entry.meta.title + '\n\n' +
entry.title + '\n\n' +
entry.date + '\n\n' +
'Link to filing: ' + entry.link + '\n\n';
if (extraResource) {
bodyText += 'Link to diff: ' + extraResource + '\n\n';
}
bodyText += entry.guid + '\n' +
entry.categories + '\n\n' +
'BuzzFeed Open Lab project: this is a Beta release. We think it is pretty cool, but you shouldn\'t depend on it just yet!\nPlease report any errors or unexpected behavior to #openlab-dev or [email protected], not to BuzzFeed dev or helpdesk. Thanks!';
sendEmail(config.emailSource, config.emails, subject, bodyText, {}, function(err) {
handleError(err);
});
}
function diffEntry(entry, feed, config, cb) {
var entryType = typeFromTitle(entry.title);
findOlderVersionOfEntry(entry, feed, config.databaseUrl, function(err, oldEntry) {
if (err) { return cb(err); }
if (!oldEntry) { return cb(null, null); }
getDocLinkFromEntry(entry, function(err, newLink) {
if (err) { return cb(err); }
getDocLinkFromEntry(oldEntry, function(err, oldLink) {
if (err) { return cb(err); }
diffDocs(oldLink, newLink, function(err, diff) {
if (err) { return cb(err); }
var body = Diff2Html.getPrettyHtml(diff, { inputFormat: 'diff' }),
html = buildDiffHtml(body),
filename = entry.guid + '.html';
fs.writeFileSync(filename, html);
uploadFileToS3('edgar-diffs', filename, html, { ACL: 'public-read', ContentType: 'text/html' }, function(err, link) {
if (err) { return cb(err); }
var secondsInAWeek = 604800;
var params = { Bucket: 'edgar-diffs', Key: filename, Expires: secondsInAWeek };
s3.getSignedUrl('getObject', params, function(err, url) {
cb(err, url);
});
});
});
});
});
});
}
function multiGet(urls, cb) {
var results = {},
countFinished = 0;
function handler(error, response, body) {
var url = response.request.uri.href;
results[url] = { error: error, response: response, body: body };
if (++countFinished === urls.length) {
cb(results);
}
};
for (var i = 0; i < urls.length; ++i) {
request(urls[i], handler);
}
}
function diffDocs(url1, url2, cb) {
var doc1 = uuid.v4(),
doc2 = uuid.v4();
exec('w3m -dump -cols 200 ' + url1 + ' > "' + doc1 + '"', function(err) {
if (err) { return cb(err); }
exec('w3m -dump -cols 200 ' + url2 + ' > "' + doc2 + '"', function(err) {
if (err) { return cb(err); }
var oneGigInBytes = 1073741824;
exec('git diff --ignore-all-space --no-index "' + doc1 + '" "' + doc2 + '"',
{ maxBuffer: oneGigInBytes - 1 }, function(err, stdout) {
// git diff returns 1 when it found a difference
if (err && err.code == 1) {
err = null;
}
fs.unlinkSync(doc1);
fs.unlinkSync(doc2);
cb(err, stdout);
});
});
});
}
function buildDiffHtml(body) {
return '<!doctype html>' +
'<html lang="en">' +
'<head>' +
'<meta charset="utf-8">' +
'<link rel="stylesheet" href="./diff-static/github.min.css">' +
'<link rel="stylesheet" type="text/css" href="./diff-static/diff2html.min.css">' +
'<script type="text/javascript" src="./diff-static/diff2html.min.js"></script>' +
'</head>' +
'<body style="text-align: center; font-family: \'Source Sans Pro\',sans-serif;">' +
body +
'</body>' +
'</html>';
}
function typeFromTitle(title) {
var normTitle = title.toUpperCase().trim();
if (normTitle.indexOf('S-1') == 0) { return 'S-1'; }
if (normTitle.indexOf('CT ORDER') == 0) { return 'CT ORDER'; }
if (normTitle.indexOf('S-8') == 0) { return 'S-8'; }
if (normTitle.indexOf('EFFECT') == 0) { return 'EFFECT'; }
if (normTitle.indexOf('CERTNYS') == 0) { return 'CERTNYS'; }
if (normTitle.indexOf('FWP') == 0) { return 'FWP'; }
if (normTitle.indexOf('8-A12B') == 0) { return '8-A12B'; }
if (normTitle.indexOf('DRS') == 0) { return 'DRS'; }
if (normTitle.indexOf('D') == 0) { return 'D'; }
return 'UNKNOWN';
}
function normalizeLink(link) {
return link.replace(/^(https:\/\/)/, "")
.replace(/^(http:\/\/)/, "")
.replace(/^(www\.)/, "");
}
function findOlderVersionOfEntry(entry, feed, databaseUrl, cb) {
var entryType = typeFromTitle(entry.title),
entryDate = new Date(entry.date),
entryLink = normalizeLink(entry.link);
pg.connect(databaseUrl, function(err, client, done) {
if (err) {
cb(err);
return done(client);
}
// slect all the entries because we don't have a way to filter on filing type
client.query('SELECT * from entries WHERE feed = $1 ORDER BY date DESC', [feed], function(err, result) {
if (err) {
cb(err);
return done(client);
}
var foundEntry = false;
for (var i = 0; i < result.rows.length; ++i) {
var row = result.rows[i],
rowType = typeFromTitle(row.title),
rowDate = new Date(row.date),
rowLink = normalizeLink(row.link);
if (rowType == entryType && rowDate < entryDate && rowLink != entryLink) {
foundEntry = true;
cb(null, row);
break;
}
}
if (!foundEntry) {
cb(null, null);
}
done();
});
});
}
function getDocLinkFromEntry(entry, cb) {
request(entry.link, function(err, response, body) {
if (err) { cb(err); }
var entryType = typeFromTitle(entry.title),
$ = cheerio.load(body);
var docRow = $('.tableFile tr').filter(function(index) {
var children = $(this).children();
return $(children[3]).text().indexOf(entryType) != -1;
});
var edgarSite = 'https://www.sec.gov',
docLink = edgarSite + $(docRow.children()[2]).find('a').attr('href');
cb(null, docLink);
});
}
function extend(obj, extensions) {
if (extensions && typeof extensions === 'object') {
var keys = Object.keys(extensions);
for (var i = 0; i < keys.length; ++i) {
obj[keys[i]] = extensions[keys[i]];
}
}
return obj;
}
function uploadFileToS3(bucket, filename, body, options, cb) {
var fileUpload = {
Bucket: bucket,
Key: filename,
ACL: 'private',
Body: body,
};
extend(fileUpload, options);
s3.putObject(fileUpload, cb);
}
function sendEmail(from, to, subject, body, options, cb) {
var email = {
Source: from,
Destination: {
ToAddresses: to
},
Message: {
Subject: {
Data: subject
},
Body: {
Text: {
Data: body
}
}
}
}
extend(email, options);
ses.sendEmail(email, cb);
}