Global callbacks

[elado]

Would be really helpful to track model hooks globally.

Let's say I have a list of categories to choose from, and on a different place on the screen user can delete categories. When they delete the selected category, I want to reset the scope variable.

scope.select = function (category) {
  scope.selectedCategory = category
};

Category.on('before:destroy', function (attrs) {
  if (scope.selectedCategory && scope.selectedCategory.id == attrs.id) {
    scope.selectedCategory = null;
  }
});

Another use case would be to update counters on delete/create.

[elado]

Saw your answer on #169

I wrote a bunch of code to help me achieve that behavior globally.

(Pardon my coffee)

app.run ($rootScope, DS) ->
  phases = ['before', 'after']
  events = ['validate', 'create', 'update', 'destroy', 'inject']

  DS.defaults.events = 'emit'

  # patch: eject before destroy
  globalCustomHooks =
    'before:destroy': (resourceName, attrs) ->
      DS.eject(resourceName, attrs[DS.definitions[resourceName].idAttribute])
      true

    # TODO 'before:create' - inject as pending, 'after:create' - remove pending flag

  fire = (resourceName, phase, event, attrs, cb) ->
    console.log "#{resourceName}:#{phase}:#{event}"
    $rootScope.$emit "#{resourceName}:#{phase}:#{event}", attrs

    customFn = globalCustomHooks["#{phase}:#{event}"]

    customFn?(resourceName, attrs)

    cb null, attrs if cb

  phases.forEach (phase) ->
    events.forEach (event) ->
      DS.defaults[phase + _.str.capitalize(event)] = (resourceName, attrs, cb) ->
        fire resourceName, phase, event, attrs, cb

  $rootScope.$on 'DS.eject', (e, resourceName, attrs) ->
    fire resourceName, 'after', 'eject', attrs

Usage is something like:

    $rootScope.$on 'categories:after:eject', (e, category) ->
      if scope.selectedCategory?.id == category.id
        scope.selectedCategory = null


    $rootScope.$on 'articles:after:inject', (e, article) ->
      if article.categoryId
        articleCountInCategory[article.categoryId]++


    $rootScope.$on 'articles:after:update', (e, article) ->
      alert "i was updated!"

It also fixes #169 destroy case, I'll implement the create and see how it goes.
Instead of $rootScope it'd be nice to use Post.$on.

Would a PR for that be welcome?

[jmdobry]

I've just about got it ready.