ircd-js/src/channel.js

function Channel(name) {
  this.name = name
  this.userlist = []

  this.join = function(user) {
    let channel = this
    this.userlist.push(user)
    this.userlist.forEach(function(item) {
      item.sendRaw(`:${user.nickname} JOIN ${channel.name}`)
    })
  }

  this.part = function(user) {
      let channel = this
      let userIndex = this.userlist.indexOf(user)
      if (userIndex >= 0) {
          this.userlist.forEach(function(item) {
              item.sendRaw(`:${user.nickname} PART ${channel.name}`)
          })
          this.userlist.splice(index, 1)
      }
  }

  this.sendMsg = function(from, message) {
      const channel = this
      this.userlist.forEach(function(item) {
          item.sendMsg(from, message, channel.name)
      })
  }
}

module.exports = Channel