import * as Bluebird from 'bluebird'
import { difference, values } from 'lodash'
import {
AfterCreate,
AfterDestroy,
AfterUpdate,
AllowNull,
BelongsTo,
Column,
CreatedAt,
DataType,
Default,
ForeignKey,
IsInt,
Max,
Model,
Table,
UpdatedAt
} from 'sequelize-typescript'
import { FollowState } from '../../../shared/models/actors'
import { ActorFollow } from '../../../shared/models/actors/follow.model'
import { logger } from '../../helpers/logger'
import { ACTOR_FOLLOW_SCORE, FOLLOW_STATES, SERVER_ACTOR_NAME } from '../../initializers/constants'
import { ServerModel } from '../server/server'
import { createSafeIn, getFollowsSort, getSort } from '../utils'
import { ActorModel, unusedActorAttributesForAPI } from './actor'
import { VideoChannelModel } from '../video/video-channel'
import { AccountModel } from '../account/account'
import { IncludeOptions, Op, QueryTypes, Transaction, WhereOptions } from 'sequelize'
import {
MActorFollowActorsDefault,
MActorFollowActorsDefaultSubscription,
MActorFollowFollowingHost,
MActorFollowFormattable,
MActorFollowSubscriptions
} from '@server/types/models'
import { ActivityPubActorType } from '@shared/models'
import { VideoModel } from '@server/models/video/video'
import { getServerActor } from '@server/models/application/application'
@Table({
tableName: 'actorFollow',
indexes: [
{
fields: [ 'actorId' ]
},
{
fields: [ 'targetActorId' ]
},
{
fields: [ 'actorId', 'targetActorId' ],
unique: true
},
{
fields: [ 'score' ]
}
]
})
export class ActorFollowModel extends Model<ActorFollowModel> {
@AllowNull(false)
@Column(DataType.ENUM(...values(FOLLOW_STATES)))
state: FollowState
@AllowNull(false)
@Default(ACTOR_FOLLOW_SCORE.BASE)
@IsInt
@Max(ACTOR_FOLLOW_SCORE.MAX)
@Column
score: number
@CreatedAt
createdAt: Date
@UpdatedAt
updatedAt: Date
@ForeignKey(() => ActorModel)
@Column
actorId: number
@BelongsTo(() => ActorModel, {
foreignKey: {
name: 'actorId',
allowNull: false
},
as: 'ActorFollower',
onDelete: 'CASCADE'
})
ActorFollower: ActorModel
@ForeignKey(() => ActorModel)
@Column
targetActorId: number
@BelongsTo(() => ActorModel, {
foreignKey: {
name: 'targetActorId',
allowNull: false
},
as: 'ActorFollowing',
onDelete: 'CASCADE'
})
ActorFollowing: ActorModel
@AfterCreate
@AfterUpdate
static incrementFollowerAndFollowingCount (instance: ActorFollowModel, options: any) {
if (instance.state !== 'accepted') return undefined
return Promise.all([
ActorModel.rebuildFollowsCount(instance.actorId, 'following', options.transaction),
ActorModel.rebuildFollowsCount(instance.targetActorId, 'followers', options.transaction)
])
}
@AfterDestroy
static decrementFollowerAndFollowingCount (instance: ActorFollowModel, options: any) {
return Promise.all([
ActorModel.rebuildFollowsCount(instance.actorId, 'following', options.transaction),
ActorModel.rebuildFollowsCount(instance.targetActorId, 'followers', options.transaction)
])
}
static removeFollowsOf (actorId: number, t?: Transaction) {
const query = {
where: {
[Op.or]: [
{
actorId
},
{
targetActorId: actorId
}
]
},
transaction: t
}
return ActorFollowModel.destroy(query)
}
// Remove actor follows with a score of 0 (too many requests where they were unreachable)
static async removeBadActorFollows () {
const actorFollows = await ActorFollowModel.listBadActorFollows()
const actorFollowsRemovePromises = actorFollows.map(actorFollow => actorFollow.destroy())
await Promise.all(actorFollowsRemovePromises)
const numberOfActorFollowsRemoved = actorFollows.length
if (numberOfActorFollowsRemoved) logger.info('Removed bad %d actor follows.', numberOfActorFollowsRemoved)
}
static isFollowedBy (actorId: number, followerActorId: number) {
const query = 'SELECT 1 FROM "actorFollow" WHERE "actorId" = $followerActorId AND "targetActorId" = $actorId LIMIT 1'
const options = {
type: QueryTypes.SELECT as QueryTypes.SELECT,
bind: { actorId, followerActorId },
raw: true
}
return VideoModel.sequelize.query(query, options)
.then(results => results.length === 1)
}
static loadByActorAndTarget (actorId: number, targetActorId: number, t?: Transaction): Bluebird<MActorFollowActorsDefault> {
const query = {
where: {
actorId,
targetActorId: targetActorId
},
include: [
{
model: ActorModel,
required: true,
as: 'ActorFollower'
},
{
model: ActorModel,
required: true,
as: 'ActorFollowing'
}
],
transaction: t
}
return ActorFollowModel.findOne(query)
}
static loadByActorAndTargetNameAndHostForAPI (
actorId: number,
targetName: string,
targetHost: string,
t?: Transaction
): Bluebird<MActorFollowActorsDefaultSubscription> {
const actorFollowingPartInclude: IncludeOptions = {
model: ActorModel,
required: true,
as: 'ActorFollowing',
where: {
preferredUsername: targetName
},
include: [
{
model: VideoChannelModel.unscoped(),
required: false
}
]
}
if (targetHost === null) {
actorFollowingPartInclude.where['serverId'] = null
} else {
actorFollowingPartInclude.include.push({
model: ServerModel,
required: true,
where: {
host: targetHost
}
})
}
const query = {
where: {
actorId
},
include: [
actorFollowingPartInclude,
{
model: ActorModel,
required: true,
as: 'ActorFollower'
}
],
transaction: t
}
return ActorFollowModel.findOne(query)
.then(result => {
if (result?.ActorFollowing.VideoChannel) {
result.ActorFollowing.VideoChannel.Actor = result.ActorFollowing
}
return result
})
}
static listSubscribedIn (actorId: number, targets: { name: string, host?: string }[]): Bluebird<MActorFollowFollowingHost[]> {
const whereTab = targets
.map(t => {
if (t.host) {
return {
[Op.and]: [
{
$preferredUsername$: t.name
},
{
$host$: t.host
}
]
}
}
return {
[Op.and]: [
{
$preferredUsername$: t.name
},
{
$serverId$: null
}
]
}
})
const query = {
attributes: [],
where: {
[Op.and]: [
{
[Op.or]: whereTab
},
{
actorId
}
]
},
include: [
{
attributes: [ 'preferredUsername' ],
model: ActorModel.unscoped(),
required: true,
as: 'ActorFollowing',
include: [
{
attributes: [ 'host' ],
model: ServerModel.unscoped(),
required: false
}
]
}
]
}
return ActorFollowModel.findAll(query)
}
static listFollowingForApi (options: {
id: number
start: number
count: number
sort: string
state?: FollowState
actorType?: ActivityPubActorType
search?: string
}) {
const { id, start, count, sort, search, state, actorType } = options
const followWhere = state ? { state } : {}
const followingWhere: WhereOptions = {}
const followingServerWhere: WhereOptions = {}
if (search) {
Object.assign(followingServerWhere, {
host: {
[Op.iLike]: '%' + search + '%'
}
})
}
if (actorType) {
Object.assign(followingWhere, { type: actorType })
}
const query = {
distinct: true,
offset: start,
limit: count,
order: getFollowsSort(sort),
where: followWhere,
include: [
{
model: ActorModel,
required: true,
as: 'ActorFollower',
where: {
id
}
},
{
model: ActorModel,
as: 'ActorFollowing',
required: true,
where: followingWhere,
include: [
{
model: ServerModel,
required: true,
where: followingServerWhere
}
]
}
]
}
return ActorFollowModel.findAndCountAll<MActorFollowActorsDefault>(query)
.then(({ rows, count }) => {
return {
data: rows,
total: count
}
})
}
static listFollowersForApi (options: {
actorId: number
start: number
count: number
sort: string
state?: FollowState
actorType?: ActivityPubActorType
search?: string
}) {
const { actorId, start, count, sort, search, state, actorType } = options
const followWhere = state ? { state } : {}
const followerWhere: WhereOptions = {}
const followerServerWhere: WhereOptions = {}
if (search) {
Object.assign(followerServerWhere, {
host: {
[Op.iLike]: '%' + search + '%'
}
})
}
if (actorType) {
Object.assign(followerWhere, { type: actorType })
}
const query = {
distinct: true,
offset: start,
limit: count,
order: getFollowsSort(sort),
where: followWhere,
include: [
{
model: ActorModel,
required: true,
as: 'ActorFollower',
where: followerWhere,
include: [
{
model: ServerModel,
required: true,
where: followerServerWhere
}
]
},
{
model: ActorModel,
as: 'ActorFollowing',
required: true,
where: {
id: actorId
}
}
]
}
return ActorFollowModel.findAndCountAll<MActorFollowActorsDefault>(query)
.then(({ rows, count }) => {
return {
data: rows,
total: count
}
})
}
static listSubscriptionsForApi (actorId: number, start: number, count: number, sort: string) {
const query = {
attributes: [],
distinct: true,
offset: start,
limit: count,
order: getSort(sort),
where: {
actorId: actorId
},
include: [
{
attributes: [ 'id' ],
model: ActorModel.unscoped(),
as: 'ActorFollowing',
required: true,
include: [
{
model: VideoChannelModel.unscoped(),
required: true,
include: [
{
attributes: {
exclude: unusedActorAttributesForAPI
},
model: ActorModel,
required: true
},
{
model: AccountModel.unscoped(),
required: true,
include: [
{
attributes: {
exclude: unusedActorAttributesForAPI
},
model: ActorModel,
required: true
}
]
}
]
}
]
}
]
}
return ActorFollowModel.findAndCountAll<MActorFollowSubscriptions>(query)
.then(({ rows, count }) => {
return {
data: rows.map(r => r.ActorFollowing.VideoChannel),
total: count
}
})
}
static async keepUnfollowedInstance (hosts: string[]) {
const followerId = (await getServerActor()).id
const query = {
attributes: [ 'id' ],
where: {
actorId: followerId
},
include: [
{
attributes: [ 'id' ],
model: ActorModel.unscoped(),
required: true,
as: 'ActorFollowing',
where: {
preferredUsername: SERVER_ACTOR_NAME
},
include: [
{
attributes: [ 'host' ],
model: ServerModel.unscoped(),
required: true,
where: {
host: {
[Op.in]: hosts
}
}
}
]
}
]
}
const res = await ActorFollowModel.findAll(query)
const followedHosts = res.map(row => row.ActorFollowing.Server.host)
return difference(hosts, followedHosts)
}
static listAcceptedFollowerUrlsForAP (actorIds: number[], t: Transaction, start?: number, count?: number) {
return ActorFollowModel.createListAcceptedFollowForApiQuery('followers', actorIds, t, start, count)
}
static listAcceptedFollowerSharedInboxUrls (actorIds: number[], t: Transaction) {
return ActorFollowModel.createListAcceptedFollowForApiQuery(
'followers',
actorIds,
t,
undefined,
undefined,
'sharedInboxUrl',
true
)
}
static listAcceptedFollowingUrlsForApi (actorIds: number[], t: Transaction, start?: number, count?: number) {
return ActorFollowModel.createListAcceptedFollowForApiQuery('following', actorIds, t, start, count)
}
static async getStats () {
const serverActor = await getServerActor()
const totalInstanceFollowing = await ActorFollowModel.count({
where: {
actorId: serverActor.id
}
})
const totalInstanceFollowers = await ActorFollowModel.count({
where: {
targetActorId: serverActor.id
}
})
return {
totalInstanceFollowing,
totalInstanceFollowers
}
}
static updateScore (inboxUrl: string, value: number, t?: Transaction) {
const query = `UPDATE "actorFollow" SET "score" = LEAST("score" + ${value}, ${ACTOR_FOLLOW_SCORE.MAX}) ` +
'WHERE id IN (' +
'SELECT "actorFollow"."id" FROM "actorFollow" ' +
'INNER JOIN "actor" ON "actor"."id" = "actorFollow"."actorId" ' +
`WHERE "actor"."inboxUrl" = '${inboxUrl}' OR "actor"."sharedInboxUrl" = '${inboxUrl}'` +
')'
const options = {
type: QueryTypes.BULKUPDATE,
transaction: t
}
return ActorFollowModel.sequelize.query(query, options)
}
static async updateScoreByFollowingServers (serverIds: number[], value: number, t?: Transaction) {
if (serverIds.length === 0) return
const me = await getServerActor()
const serverIdsString = createSafeIn(ActorFollowModel, serverIds)
const query = `UPDATE "actorFollow" SET "score" = LEAST("score" + ${value}, ${ACTOR_FOLLOW_SCORE.MAX}) ` +
'WHERE id IN (' +
'SELECT "actorFollow"."id" FROM "actorFollow" ' +
'INNER JOIN "actor" ON "actor"."id" = "actorFollow"."targetActorId" ' +
`WHERE "actorFollow"."actorId" = ${me.Account.actorId} ` + // I'm the follower
`AND "actor"."serverId" IN (${serverIdsString})` + // Criteria on followings
')'
const options = {
type: QueryTypes.BULKUPDATE,
transaction: t
}
return ActorFollowModel.sequelize.query(query, options)
}
private static async createListAcceptedFollowForApiQuery (
type: 'followers' | 'following',
actorIds: number[],
t: Transaction,
start?: number,
count?: number,
columnUrl = 'url',
distinct = false
) {
let firstJoin: string
let secondJoin: string
if (type === 'followers') {
firstJoin = 'targetActorId'
secondJoin = 'actorId'
} else {
firstJoin = 'actorId'
secondJoin = 'targetActorId'
}
const selections: string[] = []
if (distinct === true) selections.push(`DISTINCT("Follows"."${columnUrl}") AS "selectionUrl"`)
else selections.push(`"Follows"."${columnUrl}" AS "selectionUrl"`)
selections.push('COUNT(*) AS "total"')
const tasks: Bluebird<any>[] = []
for (const selection of selections) {
let query = 'SELECT ' + selection + ' FROM "actor" ' +
'INNER JOIN "actorFollow" ON "actorFollow"."' + firstJoin + '" = "actor"."id" ' +
'INNER JOIN "actor" AS "Follows" ON "actorFollow"."' + secondJoin + '" = "Follows"."id" ' +
`WHERE "actor"."id" = ANY ($actorIds) AND "actorFollow"."state" = 'accepted' AND "Follows"."${columnUrl}" IS NOT NULL `
if (count !== undefined) query += 'LIMIT ' + count
if (start !== undefined) query += ' OFFSET ' + start
const options = {
bind: { actorIds },
type: QueryTypes.SELECT,
transaction: t
}
tasks.push(ActorFollowModel.sequelize.query(query, options))
}
const [ followers, [ dataTotal ] ] = await Promise.all(tasks)
const urls: string[] = followers.map(f => f.selectionUrl)
return {
data: urls,
total: dataTotal ? parseInt(dataTotal.total, 10) : 0
}
}
private static listBadActorFollows () {
const query = {
where: {
score: {
[Op.lte]: 0
}
},
logging: false
}
return ActorFollowModel.findAll(query)
}
toFormattedJSON (this: MActorFollowFormattable): ActorFollow {
const follower = this.ActorFollower.toFormattedJSON()
const following = this.ActorFollowing.toFormattedJSON()
return {
id: this.id,
follower,
following,
score: this.score,
state: this.state,
createdAt: this.createdAt,
updatedAt: this.updatedAt
}
}
}