const mongoose = require('mongoose')
const timestamp = require('mongoose-timestamp')

const userFollowSchema = new mongoose.Schema({
  followerId: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User',
    required: true,
    index: true,
  },
  followingId: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'User',
    required: true,
    index: true,
  },
})

userFollowSchema.index({ followerId: 1, followingId: 1 }, { unique: true })

userFollowSchema.plugin(timestamp)
const UserFollowModel = mongoose.model('UserFollow', userFollowSchema)

module.exports = UserFollowModel