overleaf/services/web/app/src/Features/Analytics/AnalyticsRegistrationSourceMiddleware.js

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const logger = require('logger-sharelatex')
const OError = require('@overleaf/o-error')
const AnalyticsRegistrationSourceHelper = require('./AnalyticsRegistrationSourceHelper')
const SessionManager = require('../../Features/Authentication/SessionManager')
function setSource(source) {
return function (req, res, next) {
if (req.session) {
req.session.required_login_for = source
}
next()
}
}
function clearSource() {
return function (req, res, next) {
AnalyticsRegistrationSourceHelper.clearSource(req.session)
next()
}
}
function setInbound() {
return function setInbound(req, res, next) {
if (req.session.inbound) {
return next() // don't overwrite referrer
}
if (SessionManager.isUserLoggedIn(req.session)) {
return next() // don't store referrer if user is alread logged in
}
const referrer = req.header('referrer')
try {
AnalyticsRegistrationSourceHelper.setInbound(
req.session,
req.url,
req.query,
referrer
)
} catch (error) {
// log errors and fail silently
OError.tag(error, 'failed to parse inbound referrer', {
referrer,
})
logger.warn({ error }, error.message)
}
next()
}
}
module.exports = {
setSource,
clearSource,
setInbound,
}