AngularJS ORM*

*And scalable application structure

WHOIS Dean

Dean Sofer .com
Github.com/ ProLoser
Founder of AngularUI
Works @ Paxata* in CA
*we're hiring (you know; like everyone else)

Topics*

*that I want to cover but probably can't

$scope clutter
Relational models
Organization / Packaging

States + Nesting
Module / File breakdown

Complex 'live' applications (sockets)
Event management
Ponies (like Directive Layering)

Technologies

Coffeescript
UI-Router
Sockets
Bacon.js
Magic Pixie Dust

You don't have to use any of these!

Interesting syntax
Last line always returned
Promises++
CLASSES IN JAVASCRIPT!
"Should I use Coffeescript?"

Nesting Views
Multiple / Named Views
State Transitions
State Management
Token Regex
More...

Live stream of events
2 way data communication

Stream and event library
Includes Features Like:

Subscribing
Filtering
Mapping
Others I don't care that much about...

Makes dealing with large streams easier
Powerful alternative to $broadcast() / $emit()

How to read my Coffeescript

Javascript:

function( x, y, z ){
  ...
}

this.property( x )

var x = {
  prop: true
}

Coffeescript:

( x, y, z ) ->
  ...

@property x

x = 
  prop: true

Lets Build an App

 // First Steps...
<a ng-click=" open = !open ">Toggle</a>
<div ng-show=" open ">Content!</div>

Eventually...

 // Later Steps...
<a ng-click=" userOpen = !userOpen ">Toggle</a>
<a ng-click=" carOpen = !carOpen ">Toggle</a>
<a ng-click=" animalOpen = !animalOpen ">Toggle</a>
<a ng-click=" insaneOpen = !insaneOpen ">Toggle</a>

Hundreds of confusing scope variables
Clobbering and inconsistent names
No explicit API defined for reference
Bloated controllers

Objects Should Manage Their Data

(Not controllers)

module.controller 'Person', ($scope, mySocket, $http, Person) ->
  $scope.person = Person.get()

  $scope.save = (data) ->
    ...
    $http(...)

  $scope.$on 'socketMessage', (event) ->
    if event.object != 'Pet' return
    switch event.type
      when 'CREATE', 'GET'
        $scope.pet = event.data
      when 'UPDATE'
        ...
      when 'DELETE'
        delete $scope.pet

Models on Crack

module.factory 'BaseObject', ($q) ->
  class BaseObject
    constructor: (initData) ->
      angular.extend( @, initData )

module.factory 'PersonObject', (BaseObject) ->
  class PersonObject extends BaseObject
    constructor: (initData) ->
      super(initData)
      ...
    remove: ->
      ...
    save: ->
      @id && @create() || @update()
    create: ->
      ...
    update: ->
      ...

module.factory 'AppObject', (BaseObject) ->
  class AppObject extends BaseObject    ...
  # Returns singleton instance instead of class
  return new AppObject()

Clean Controllers & Scopes!

                                   # Resolved in Router
module.controller 'Person', ($scope, person) ->
  $scope.person = person

<form ng-submit="person.save()">...</form>

<a ng-click="person.getPets()">Show Pets</a>

<h2>Pets:</h2>
<div ng-repeat="pet in person.pets">

  <h3>{{pet.name}}</h3>
  <a ng-click="pet.getTricks()">List Tricks</a>
  <ul>
    <li ng-repeat="trick in pet.tricks">{{trick.name}}</li>
  </ul>
</div>

Sockets + Events

Lots of CRUD events for every Object
$broadcast / $emit is atomic and limited
Tedious listener delegation
Tedious collection cache management
"Context" on all queries

Sockets + Bacon.JS

Hooking it up

# Create new Bacon streams
socketStream = new Bacon.Bus()
queryStream = new Bacon.Bus()

# Subscribe to socket events
mySocket.onmessage = ( event ) ->
  $rootScope.$apply ->
    # Broadcast new stream event
    socketStream.push ( event )

# Subscribe to query requests
queryStream.onValue ( event ) ->
  mySocket.send( JSON.stringify( event ) )

Feeding it through

class AppObject extends BaseObject
  constructor: ( @downStream, @upStream ) ->
  query: ( data ) ->
    @upStream.push( data )

app = new AppObject( socketStream, queryStream )

Sockets + Bacon.JS

Listening in

class ProjectObject extends BaseObject
  constructor: ( @downStream, @upStream, initData ) ->

    # All events on this object and deeper filtered to this project object
    @downStream = @downStream.filter (event) ->
      return ( event.projectId == @id )

    # All queries get decorated with context
    @upStream.onValue (event) ->
      event.projectId = @id

Relationship Streaming

class PersonObject extends BaseObject
  getPets: ->
    ...
  getPet: (id) ->
    if !@pets
      @getPets().then ->
        return @pets[id]
    else if @pets[id]
      $q.resolve(@pets[id])
    else
      @query({ type: 'READ', object: 'Pet', id: id }).then (petData) ->
        # spins up a new instance and passes in streams and data
        return @pets[id] = new PetObject(@downStream, @upStream, petData)


class PetObject extends BaseObject
  constructor: ( @downStream, @upStream, initData ) ->
    super( @downStream, @upStream, initData )

    # All events on this object and deeper filtered to this Pet object
    @downStream = @downStream.filter (event) ->
      return ( event.petId == @id )

Object Maintanence

class PersonObject extends BaseObject
  constructor: ( @downStream, @upStream, initData )
    @super( @downStream, @upStream, initData )
    
    @downStream.filter( (event) ->
      return (event.type == 'UPDATE' && event.object == 'Person')
    ).onValue (event) ->
      angular.extend(@, event.data)
    
    @downStream.filter( (event) ->
      return (@pets && event.type == 'CREATE' && event.object == 'Pet')
    ).onValue (event) ->
      @pets[event.data.id] = new PetObject(@downStream, @upStream, event.data)

UI-Router

Nested Views

$stateProvider.state 'top',
  url: '/top/{topId}' # /top/123
  template: '<div> ... <ui-view></ui-view> ... </div>'
  controller: ($stateParams) ->
    $stateParams.topId

$stateProvider.state 'top.middle',
  url: '/middle/{middleId}' # /top/123/middle/123
  template: '<div> ... <ui-view></ui-view> ... </div>'
  controller: ($stateParams) ->
    $stateParams.topId
    $stateParams.middleId

$stateProvider.state 'bottom',
  url: '/bottom/{middleId}' # /top/123/middle/123/bottom/123
  parent: 'top.middle'
  template: '<div> ... <ui-view></ui-view> ... </div>'
  controller: ($stateParams) ->
    $stateParams.topId
    $stateParams.middleId
    $stateParams.bottomId

UI-Router

Named Views

<nav ui-view="nav"></nav>
...
<ui-view></ui-view>

$stateProvider.state 'top', 
  url: '/top/{topId}' # /top/123
  template: '<div>...<ui-view></ui-view>...</div>'
  controller: -> ...

$stateProvider.state 'top.middle',
  url: '/middle/{middleId}' # /top/123/middle/123
  template: '<div> ... <ui-view></ui-view> ... </div>'
  views:
    '': # un-named <ui-view>
      template: '<div>Body</div>'
      controller: -> ...
    'nav@': # nav <ui-view> at the top level
      template: '<h1>Middle</h1>'
      controller: -> ...

Resolve Through Relationships

$stateProvider.state 'person',
  url: 'person/{personId}'
  resolve:
    person: ( $stateParams, AppObject ) ->
      return AppObject.getPerson( $stateParams.personId )
  controller: ( person ) ->
    ...

$stateProvider.state 'person.pet',
  resolve:
    pet: ( $stateParams, person ) ->
      return person.getPet( $stateParams.petId )
      
$stateProvider.state 'person.pet.tricks',
  resolve:
    tricks: ( pet ) ->
      return pet.getTricks()
  controller: ( tricks, pet, person ) ->
    ...

Router Manages Active State

(NOT SERVICES)

$stateProvider.state 'person',
  url: '/person/{personId}'
  resolve:
    person: ( $stateParams, AppObject ) ->
      return AppObject.getPerson( $state.personId )
  onEnter: ( person ) ->
    person.open()
  onExit: ( person ) ->
    person.close()

Organized Modules

angular.module('myApp.directives')
angular.module('myApp.models')

How can we do better?

angular.module('myApp.Core')
angular.module('myApp.Person')
angular.module('myApp.Car')

Even better?

angular.module('myApp.Person.Child')
angular.module('myApp.Animal.Dog')
angular.module('myApp.Admin') // 'mixin' module

Dependency Madness!

Dependencies should be distributed:

# Wrapper module
module = angular.module( 'myApp.Person', [
  'myApp.Person.Core',
  'myApp.Person.Child',
  'ui.utils',
  'ui.bootstrap',
  'ui.router'
] )
# Bootstrapping Module
core = angular.module( 'myApp.Person.Core', [
  'myApp.Core', # BaseObject
  'myApp.Animal.Pet', # PetObject
  'ui.router'
] )core.config ($stateProvider) ->
  ...
core.factory 'PersonObject', (PetObject) ->
module.directive( 'dash-person', ... )
module.controller( 'People', ... )

WAt?

States must be declared in order at bootstrap:

PersonState - /person/123
Person.ChildState - /person/123/child/123

But Object dependencies are reversed:

                                             # ChildObject must be defined
module.factory 'PersonObject', ['BaseObject', 'ChildObject']

Dependency Trees

Just call wrapper modules

myApp

myApp.Animal

myApp.Animal.Dog

myApp.Core

myApp.Core

myApp.Person

myApp.Person.Child

myApp.Core

myApp.Core

#mindblown

Feen.

AngularJS ORM

By Dean Sofer

AngularJS ORM

Checkout my talk that goes along with the slides: http://www.youtube.com/watch?v=Iw-3qgG_ipU

12,937

AngularJS ORM*

WHOIS Dean

Topics*

Technologies

How to read my Coffeescript

Lets Build an App

Eventually...

Objects Should Manage Their Data

(Not controllers)

Models on Crack

Clean Controllers & Scopes!

Sockets + Events

Sockets + Bacon.JS

Sockets + Bacon.JS

Relationship Streaming

Object Maintanence

UI-Router

UI-Router

Resolve Through Relationships

Router Manages Active State

(NOT SERVICES)

Organized Modules

How can we do better?

Even better?

Dependency Madness!

WAt?

Dependency Trees

#mindblown

Feen.

AngularJS ORM

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