stf/res/app/scripts/services/GroupService.js

define(['./_module', 'lodash'], function(app, _) {
  function GroupServiceFactory($rootScope, $http, socket, userService) {
    var groupService = {
    }

    groupService.group = (function() {
      var groupPromise = $http.get('/api/v1/group')
        .then(function(response) {
          return response.data.group
        })
      return function() {
        return groupPromise
      }
    })()

    userService.user().then(function(user) {
      function ownerFilter(listener) {
        return function(data) {
          if (data.owner.email === user.email) {
            listener()
          }
        }
      }

      socket.on('group.join', ownerFilter(function(data) {
        groupService.group().then(function(group) {
          group.members.push(data.serial)
          console.log('group.join', data)
          $rootScope.$digest()
        })
      }))

      socket.on('group.leave', ownerFilter(function(data) {
        groupService.group().then(function(group) {
          _.pull(group.members, data.serial)
          console.log('group.leave', data)
          $rootScope.$digest()
        })
      }))

      socket.on('device.absent', /* unfiltered */ function(data) {
        groupService.group().then(function(group) {
          _.pull(group.members, data.serial)
          $rootScope.$digest()
        })
      })
    })

    groupService.invite = function(requirements) {
      userService.user().then(function(user) {
        socket.emit('group.invite', requirements)
      })
    }

    groupService.kick = function(requirements) {
      userService.user().then(function(user) {
        socket.emit('group.kick', requirements)
      })
    }

    return groupService
  }

  app.factory('GroupService'
  , [ '$rootScope'
    , '$http'
    , 'SocketService'
    , 'UserService'
    , GroupServiceFactory
    ])
})