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import * as express from 'express'
import { UserRight } from '../../../../shared/models/users'
import { sanitizeHost } from '../../../helpers/core-utils'
import { retryTransactionWrapper } from '../../../helpers/database-utils'
import { logger } from '../../../helpers/logger'
import { getFormattedObjects, getServerActor } from '../../../helpers/utils'
import { loadActorUrlOrGetFromWebfinger } from '../../../helpers/webfinger'
import { REMOTE_SCHEME, sequelizeTypescript, SERVER_ACTOR_NAME } from '../../../initializers'
import { getOrCreateActorAndServerAndModel } from '../../../lib/activitypub/actor'
import { sendFollow, sendUndoFollow } from '../../../lib/activitypub/send'
import {
asyncMiddleware, authenticate, ensureUserHasRight, paginationValidator, removeFollowingValidator, setBodyHostsPort, setDefaultSort,
setDefaultPagination
} from '../../../middlewares'
import { followersSortValidator, followingSortValidator, followValidator } from '../../../middlewares/validators'
import { ActorModel } from '../../../models/activitypub/actor'
import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
const serverFollowsRouter = express.Router()
serverFollowsRouter.get('/following',
paginationValidator,
followingSortValidator,
setDefaultSort,
setDefaultPagination,
asyncMiddleware(listFollowing)
)
serverFollowsRouter.post('/following',
authenticate,
ensureUserHasRight(UserRight.MANAGE_SERVER_FOLLOW),
followValidator,
setBodyHostsPort,
asyncMiddleware(followRetry)
)
serverFollowsRouter.delete('/following/:host',
authenticate,
ensureUserHasRight(UserRight.MANAGE_SERVER_FOLLOW),
asyncMiddleware(removeFollowingValidator),
asyncMiddleware(removeFollow)
)
serverFollowsRouter.get('/followers',
paginationValidator,
followersSortValidator,
setDefaultSort,
setDefaultPagination,
asyncMiddleware(listFollowers)
)
// ---------------------------------------------------------------------------
export {
serverFollowsRouter
}
// ---------------------------------------------------------------------------
async function listFollowing (req: express.Request, res: express.Response, next: express.NextFunction) {
const serverActor = await getServerActor()
const resultList = await ActorFollowModel.listFollowingForApi(serverActor.id, req.query.start, req.query.count, req.query.sort)
return res.json(getFormattedObjects(resultList.data, resultList.total))
}
async function listFollowers (req: express.Request, res: express.Response, next: express.NextFunction) {
const serverActor = await getServerActor()
const resultList = await ActorFollowModel.listFollowersForApi(serverActor.id, req.query.start, req.query.count, req.query.sort)
return res.json(getFormattedObjects(resultList.data, resultList.total))
}
async function followRetry (req: express.Request, res: express.Response, next: express.NextFunction) {
const hosts = req.body.hosts as string[]
const fromActor = await getServerActor()
const tasks: Promise<any>[] = []
const actorName = SERVER_ACTOR_NAME
for (const host of hosts) {
const sanitizedHost = sanitizeHost(host, REMOTE_SCHEME.HTTP)
// We process each host in a specific transaction
// First, we add the follow request in the database
// Then we send the follow request to other actor
const p = loadActorUrlOrGetFromWebfinger(actorName, sanitizedHost)
.then(actorUrl => getOrCreateActorAndServerAndModel(actorUrl))
.then(targetActor => {
const options = {
arguments: [ fromActor, targetActor ],
errorMessage: 'Cannot follow with many retries.'
}
return retryTransactionWrapper(follow, options)
})
.catch(err => logger.warn('Cannot follow server %s.', sanitizedHost, err))
tasks.push(p)
}
// Don't make the client wait the tasks
Promise.all(tasks)
.catch(err => logger.error('Error in follow.', err))
return res.status(204).end()
}
function follow (fromActor: ActorModel, targetActor: ActorModel) {
if (fromActor.id === targetActor.id) {
throw new Error('Follower is the same than target actor.')
}
return sequelizeTypescript.transaction(async t => {
const [ actorFollow ] = await ActorFollowModel.findOrCreate({
where: {
actorId: fromActor.id,
targetActorId: targetActor.id
},
defaults: {
state: 'pending',
actorId: fromActor.id,
targetActorId: targetActor.id
},
transaction: t
})
actorFollow.ActorFollowing = targetActor
actorFollow.ActorFollower = fromActor
// Send a notification to remote server
await sendFollow(actorFollow)
})
}
async function removeFollow (req: express.Request, res: express.Response, next: express.NextFunction) {
const follow: ActorFollowModel = res.locals.follow
await sequelizeTypescript.transaction(async t => {
if (follow.state === 'accepted') await sendUndoFollow(follow, t)
await follow.destroy({ transaction: t })
})
// Destroy the actor that will destroy video channels, videos and video files too
// This could be long so don't wait this task
const following = follow.ActorFollowing
following.destroy()
.catch(err => logger.error('Cannot destroy actor that we do not follow anymore %s.', following.url, err))
return res.status(204).end()
}
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