import * as Bluebird from 'bluebird' import { values } from 'lodash' import * as Sequelize from 'sequelize' 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 { AccountFollow } from '../../../shared/models/actors/follow.model' import { logger } from '../../helpers/logger' import { ACTOR_FOLLOW_SCORE } from '../../initializers' import { FOLLOW_STATES } from '../../initializers/constants' import { ServerModel } from '../server/server' import { getSort } from '../utils' import { ActorModel } from './actor' @Table({ tableName: 'actorFollow', indexes: [ { fields: [ 'actorId' ] }, { fields: [ 'targetActorId' ] }, { fields: [ 'actorId', 'targetActorId' ], unique: true }, { fields: [ 'score' ] } ] }) export class ActorFollowModel extends Model { @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) { if (instance.state !== 'accepted') return undefined return Promise.all([ ActorModel.incrementFollows(instance.actorId, 'followingCount', 1), ActorModel.incrementFollows(instance.targetActorId, 'followersCount', 1) ]) } @AfterDestroy static decrementFollowerAndFollowingCount (instance: ActorFollowModel) { return Promise.all([ ActorModel.incrementFollows(instance.actorId, 'followingCount',-1), ActorModel.incrementFollows(instance.targetActorId, 'followersCount', -1) ]) } // 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 updateActorFollowsScoreAndRemoveBadOnes (goodInboxes: string[], badInboxes: string[], t: Sequelize.Transaction) { if (goodInboxes.length === 0 && badInboxes.length === 0) return logger.info('Updating %d good actor follows and %d bad actor follows scores.', goodInboxes.length, badInboxes.length) if (goodInboxes.length !== 0) { ActorFollowModel.incrementScores(goodInboxes, ACTOR_FOLLOW_SCORE.BONUS, t) .catch(err => logger.error('Cannot increment scores of good actor follows.', err)) } if (badInboxes.length !== 0) { ActorFollowModel.incrementScores(badInboxes, ACTOR_FOLLOW_SCORE.PENALTY, t) .catch(err => logger.error('Cannot decrement scores of bad actor follows.', err)) } } static loadByActorAndTarget (actorId: number, targetActorId: number, t?: Sequelize.Transaction) { 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 loadByActorAndTargetHost (actorId: number, targetHost: string, t?: Sequelize.Transaction) { const query = { where: { actorId }, include: [ { model: ActorModel, required: true, as: 'ActorFollower' }, { model: ActorModel, required: true, as: 'ActorFollowing', include: [ { model: ServerModel, required: true, where: { host: targetHost } } ] } ], transaction: t } return ActorFollowModel.findOne(query) } static loadByFollowerInbox (url: string, t?: Sequelize.Transaction) { const query = { where: { state: 'accepted' }, include: [ { model: ActorModel, required: true, as: 'ActorFollower', where: { [Sequelize.Op.or]: [ { inboxUrl: url }, { sharedInboxUrl: url } ] } } ], transaction: t } as any // FIXME: typings does not work return ActorFollowModel.findOne(query) } static listFollowingForApi (id: number, start: number, count: number, sort: string) { const query = { distinct: true, offset: start, limit: count, order: [ getSort(sort) ], include: [ { model: ActorModel, required: true, as: 'ActorFollower', where: { id } }, { model: ActorModel, as: 'ActorFollowing', required: true, include: [ ServerModel ] } ] } return ActorFollowModel.findAndCountAll(query) .then(({ rows, count }) => { return { data: rows, total: count } }) } static listFollowersForApi (id: number, start: number, count: number, sort: string) { const query = { distinct: true, offset: start, limit: count, order: [ getSort(sort) ], include: [ { model: ActorModel, required: true, as: 'ActorFollower', include: [ ServerModel ] }, { model: ActorModel, as: 'ActorFollowing', required: true, where: { id } } ] } return ActorFollowModel.findAndCountAll(query) .then(({ rows, count }) => { return { data: rows, total: count } }) } static listAcceptedFollowerUrlsForApi (actorIds: number[], t: Sequelize.Transaction, start?: number, count?: number) { return ActorFollowModel.createListAcceptedFollowForApiQuery('followers', actorIds, t, start, count) } static listAcceptedFollowerSharedInboxUrls (actorIds: number[], t: Sequelize.Transaction) { return ActorFollowModel.createListAcceptedFollowForApiQuery( 'followers', actorIds, t, undefined, undefined, 'sharedInboxUrl', true ) } static listAcceptedFollowingUrlsForApi (actorIds: number[], t: Sequelize.Transaction, start?: number, count?: number) { return ActorFollowModel.createListAcceptedFollowForApiQuery('following', actorIds, t, start, count) } private static async createListAcceptedFollowForApiQuery ( type: 'followers' | 'following', actorIds: number[], t: Sequelize.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 "url"') else selections.push('"Follows"."' + columnUrl + '" AS "url"') selections.push('COUNT(*) AS "total"') const tasks: Bluebird[] = [] for (let 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 ($actorIds) AND "actorFollow"."state" = \'accepted\' ' if (count !== undefined) query += 'LIMIT ' + count if (start !== undefined) query += ' OFFSET ' + start const options = { bind: { actorIds }, type: Sequelize.QueryTypes.SELECT, transaction: t } tasks.push(ActorFollowModel.sequelize.query(query, options)) } const [ followers, [ { total } ] ] = await Promise.all(tasks) const urls: string[] = followers.map(f => f.url) return { data: urls, total: parseInt(total, 10) } } private static incrementScores (inboxUrls: string[], value: number, t: Sequelize.Transaction) { const inboxUrlsString = inboxUrls.map(url => `'${url}'`).join(',') 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" IN (' + inboxUrlsString + ') OR "actor"."sharedInboxUrl" IN (' + inboxUrlsString + ')' + ')' const options = { type: Sequelize.QueryTypes.BULKUPDATE, transaction: t } return ActorFollowModel.sequelize.query(query, options) } private static listBadActorFollows () { const query = { where: { score: { [Sequelize.Op.lte]: 0 } }, logger: false } return ActorFollowModel.findAll(query) } toFormattedJSON (): AccountFollow { 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 } } }