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import * as express from 'express'
import { UserRight } from '../../../../shared/models/users'
import { getAccountFromWebfinger, getFormattedObjects, getServerAccount, logger, retryTransactionWrapper } from '../../../helpers'
import { sequelizeTypescript, SERVER_ACCOUNT_NAME } from '../../../initializers'
import { saveAccountAndServerIfNotExist } from '../../../lib/activitypub'
import { sendUndoFollow } from '../../../lib/activitypub/send'
import { sendFollow } from '../../../lib/index'
import {
asyncMiddleware,
authenticate,
ensureUserHasRight,
paginationValidator,
removeFollowingValidator,
setBodyHostsPort,
setFollowersSort,
setFollowingSort,
setPagination
} from '../../../middlewares'
import { followersSortValidator, followingSortValidator, followValidator } from '../../../middlewares/validators'
import { AccountModel } from '../../../models/account/account'
import { AccountFollowModel } from '../../../models/account/account-follow'
const serverFollowsRouter = express.Router()
serverFollowsRouter.get('/following',
paginationValidator,
followingSortValidator,
setFollowingSort,
setPagination,
asyncMiddleware(listFollowing)
)
serverFollowsRouter.post('/following',
authenticate,
ensureUserHasRight(UserRight.MANAGE_SERVER_FOLLOW),
followValidator,
setBodyHostsPort,
asyncMiddleware(followRetry)
)
serverFollowsRouter.delete('/following/:accountId',
authenticate,
ensureUserHasRight(UserRight.MANAGE_SERVER_FOLLOW),
asyncMiddleware(removeFollowingValidator),
asyncMiddleware(removeFollow)
)
serverFollowsRouter.get('/followers',
paginationValidator,
followersSortValidator,
setFollowersSort,
setPagination,
asyncMiddleware(listFollowers)
)
// ---------------------------------------------------------------------------
export {
serverFollowsRouter
}
// ---------------------------------------------------------------------------
async function listFollowing (req: express.Request, res: express.Response, next: express.NextFunction) {
const serverAccount = await getServerAccount()
const resultList = await AccountFollowModel.listFollowingForApi(serverAccount.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 serverAccount = await getServerAccount()
const resultList = await AccountFollowModel.listFollowersForApi(serverAccount.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 fromAccount = await getServerAccount()
const tasks: Promise<any>[] = []
const accountName = SERVER_ACCOUNT_NAME
for (const host of hosts) {
// 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 account
const p = loadLocalOrGetAccountFromWebfinger(accountName, host)
.then(accountResult => {
let targetAccount = accountResult.account
const options = {
arguments: [ fromAccount, targetAccount, accountResult.loadedFromDB ],
errorMessage: 'Cannot follow with many retries.'
}
return retryTransactionWrapper(follow, options)
})
.catch(err => logger.warn('Cannot follow server %s.', `${accountName}@${host}`, 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()
}
async function follow (fromAccount: AccountModel, targetAccount: AccountModel, targetAlreadyInDB: boolean) {
try {
await sequelizeTypescript.transaction(async t => {
if (targetAlreadyInDB === false) {
await saveAccountAndServerIfNotExist(targetAccount, t)
}
const [ accountFollow ] = await AccountFollowModel.findOrCreate({
where: {
accountId: fromAccount.id,
targetAccountId: targetAccount.id
},
defaults: {
state: 'pending',
accountId: fromAccount.id,
targetAccountId: targetAccount.id
},
transaction: t
})
accountFollow.AccountFollowing = targetAccount
accountFollow.AccountFollower = fromAccount
// Send a notification to remote server
if (accountFollow.state === 'pending') {
await sendFollow(accountFollow, t)
}
})
} catch (err) {
// Reset target account
targetAccount.isNewRecord = !targetAlreadyInDB
throw err
}
}
async function removeFollow (req: express.Request, res: express.Response, next: express.NextFunction) {
const follow: AccountFollowModel = res.locals.follow
await sequelizeTypescript.transaction(async t => {
if (follow.state === 'accepted') await sendUndoFollow(follow, t)
await follow.destroy({ transaction: t })
})
// Destroy the account that will destroy video channels, videos and video files too
// This could be long so don't wait this task
const following = follow.AccountFollowing
following.destroy()
.catch(err => logger.error('Cannot destroy account that we do not follow anymore %s.', following.url, err))
return res.status(204).end()
}
async function loadLocalOrGetAccountFromWebfinger (name: string, host: string) {
let loadedFromDB = true
let account = await AccountModel.loadByNameAndHost(name, host)
if (!account) {
const nameWithDomain = name + '@' + host
account = await getAccountFromWebfinger(nameWithDomain)
loadedFromDB = false
}
return { account, loadedFromDB }
}
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