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import { eachSeries } from 'async'
import { NextFunction, Request, RequestHandler, Response } from 'express'
import { ActivityPubSignature } from '../../shared'
import { isSignatureVerified, logger } from '../helpers'
import { database as db } from '../initializers'
import { ACTIVITY_PUB } from '../initializers/constants'
import { fetchRemoteAccount, saveAccountAndServerIfNotExist } from '../lib/activitypub/account'
async function checkSignature (req: Request, res: Response, next: NextFunction) {
const signatureObject: ActivityPubSignature = req.body.signature
logger.debug('Checking signature of account %s...', signatureObject.creator)
let account = await db.Account.loadByUrl(signatureObject.creator)
// We don't have this account in our database, fetch it on remote
if (!account) {
account = await fetchRemoteAccount(signatureObject.creator)
if (!account) {
return res.sendStatus(403)
}
// Save our new account and its server in database
await saveAccountAndServerIfNotExist(account)
}
const verified = await isSignatureVerified(account, req.body)
if (verified === false) return res.sendStatus(403)
res.locals.signature = {
account
}
return next()
}
function executeIfActivityPub (fun: RequestHandler | RequestHandler[]) {
return (req: Request, res: Response, next: NextFunction) => {
if (!req.accepts(ACTIVITY_PUB.POTENTIAL_ACCEPT_HEADERS)) {
return next()
}
logger.debug('ActivityPub request for %s.', req.url)
if (Array.isArray(fun) === true) {
return eachSeries(fun as RequestHandler[], (f, cb) => {
f(req, res, cb)
}, next)
}
return (fun as RequestHandler)(req, res, next)
}
}
// ---------------------------------------------------------------------------
export {
checkSignature,
executeIfActivityPub
}
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