server/models/account/account-follow.ts

   1 import { values } from 'lodash'
   2 import * as Sequelize from 'sequelize'
   3
   4 import { addMethodsToModel, getSort } from '../utils'
   5 import { AccountFollowAttributes, AccountFollowInstance, AccountFollowMethods } from './account-follow-interface'
   6 import { FOLLOW_STATES } from '../../initializers/constants'
   7
   8 let AccountFollow: Sequelize.Model<AccountFollowInstance, AccountFollowAttributes>
   9 let loadByAccountAndTarget: AccountFollowMethods.LoadByAccountAndTarget
  10 let listFollowingForApi: AccountFollowMethods.ListFollowingForApi
  11 let listFollowersForApi: AccountFollowMethods.ListFollowersForApi
  12 let listAcceptedFollowerUrlsForApi: AccountFollowMethods.ListAcceptedFollowerUrlsForApi
  13 let listAcceptedFollowingUrlsForApi: AccountFollowMethods.ListAcceptedFollowingUrlsForApi
  14
  15 export default function (sequelize: Sequelize.Sequelize, DataTypes: Sequelize.DataTypes) {
  16   AccountFollow = sequelize.define<AccountFollowInstance, AccountFollowAttributes>('AccountFollow',
  17     {
  18       state: {
  19         type: DataTypes.ENUM(values(FOLLOW_STATES)),
  20         allowNull: false
  21       }
  22     },
  23     {
  24       indexes: [
  25         {
  26           fields: [ 'accountId' ]
  27         },
  28         {
  29           fields: [ 'targetAccountId' ]
  30         },
  31         {
  32           fields: [ 'accountId', 'targetAccountId' ],
  33           unique: true
  34         }
  35       ]
  36     }
  37   )
  38
  39   const classMethods = [
  40     associate,
  41     loadByAccountAndTarget,
  42     listFollowingForApi,
  43     listFollowersForApi,
  44     listAcceptedFollowerUrlsForApi,
  45     listAcceptedFollowingUrlsForApi
  46   ]
  47   addMethodsToModel(AccountFollow, classMethods)
  48
  49   return AccountFollow
  50 }
  51
  52 // ------------------------------ STATICS ------------------------------
  53
  54 function associate (models) {
  55   AccountFollow.belongsTo(models.Account, {
  56     foreignKey: {
  57       name: 'accountId',
  58       allowNull: false
  59     },
  60     as: 'AccountFollower',
  61     onDelete: 'CASCADE'
  62   })
  63
  64   AccountFollow.belongsTo(models.Account, {
  65     foreignKey: {
  66       name: 'targetAccountId',
  67       allowNull: false
  68     },
  69     as: 'AccountFollowing',
  70     onDelete: 'CASCADE'
  71   })
  72 }
  73
  74 loadByAccountAndTarget = function (accountId: number, targetAccountId: number) {
  75   const query = {
  76     where: {
  77       accountId,
  78       targetAccountId
  79     }
  80   }
  81
  82   return AccountFollow.findOne(query)
  83 }
  84
  85 listFollowingForApi = function (id: number, start: number, count: number, sort: string) {
  86   const query = {
  87     distinct: true,
  88     offset: start,
  89     limit: count,
  90     order: [ getSort(sort) ],
  91     include: [
  92       {
  93         model: AccountFollow[ 'sequelize' ].models.Account,
  94         required: true,
  95         as: 'AccountFollower',
  96         where: {
  97           id
  98         }
  99       },
 100       {
 101         model: AccountFollow['sequelize'].models.Account,
 102         as: 'AccountFollowing',
 103         required: true,
 104         include: [ AccountFollow['sequelize'].models.Server ]
 105       }
 106     ]
 107   }
 108
 109   return AccountFollow.findAndCountAll(query).then(({ rows, count }) => {
 110     return {
 111       data: rows.map(r => r.AccountFollowing),
 112       total: count
 113     }
 114   })
 115 }
 116
 117 listFollowersForApi = function (id: number, start: number, count: number, sort: string) {
 118   const query = {
 119     distinct: true,
 120     offset: start,
 121     limit: count,
 122     order: [ getSort(sort) ],
 123     include: [
 124       {
 125         model: AccountFollow[ 'sequelize' ].models.Account,
 126         required: true,
 127         as: 'AccountFollower',
 128         include: [ AccountFollow['sequelize'].models.Server ]
 129       },
 130       {
 131         model: AccountFollow['sequelize'].models.Account,
 132         as: 'AccountFollowing',
 133         required: true,
 134         where: {
 135           id
 136         }
 137       }
 138     ]
 139   }
 140
 141   return AccountFollow.findAndCountAll(query).then(({ rows, count }) => {
 142     return {
 143       data: rows.map(r => r.AccountFollower),
 144       total: count
 145     }
 146   })
 147 }
 148
 149 listAcceptedFollowerUrlsForApi = function (id: number, start: number, count?: number) {
 150   return createListAcceptedFollowForApiQuery('followers', id, start, count)
 151 }
 152
 153 listAcceptedFollowingUrlsForApi = function (id: number, start: number, count?: number) {
 154   return createListAcceptedFollowForApiQuery('following', id, start, count)
 155 }
 156
 157 // ------------------------------ UTILS ------------------------------
 158
 159 async function createListAcceptedFollowForApiQuery (type: 'followers' | 'following', id: number, start: number, count?: number) {
 160   let firstJoin: string
 161   let secondJoin: string
 162
 163   if (type === 'followers') {
 164     firstJoin = 'targetAccountId'
 165     secondJoin = 'accountId'
 166   } else {
 167     firstJoin = 'accountId'
 168     secondJoin = 'targetAccountId'
 169   }
 170
 171   const selections = [ '"Followers"."url" AS "url"', 'COUNT(*) AS "total"' ]
 172   const tasks: Promise<any>[] = []
 173
 174   for (const selection of selections) {
 175     let query = 'SELECT ' + selection + ' FROM "Account" ' +
 176       'INNER JOIN "AccountFollow" ON "AccountFollow"."' + firstJoin + '" = "Account"."id" ' +
 177       'INNER JOIN "Account" AS "Follows" ON "Followers"."id" = "Follows"."' + secondJoin + '" ' +
 178       'WHERE "Account"."id" = $id AND "AccountFollow"."state" = \'accepted\' ' +
 179       'LIMIT ' + start
 180
 181     if (count !== undefined) query += ', ' + count
 182
 183     const options = {
 184       bind: { id },
 185       type: Sequelize.QueryTypes.SELECT
 186     }
 187     tasks.push(AccountFollow['sequelize'].query(query, options))
 188   }
 189
 190   const [ followers, [ { total } ]] = await Promise.all(tasks)
 191   const urls: string[] = followers.map(f => f.url)
 192
 193   return {
 194     data: urls,
 195     total: parseInt(total, 10)
 196   }
 197 }