Contents

module TheCommentsStates
  extend ActiveSupport::Concern

  included do
    # :draft | :published | :deleted
    state_machine :state, :initial => TheComments.config.default_state do

      # events
      event :to_draft do
        transition all - :draft => :draft
      end

      event :to_published do
        transition all - :published => :published
      end

      event :to_deleted do
        transition any - :deleted => :deleted
      end

      # transition callbacks
      after_transition any => any do |comment|
        @comment     = comment
        @owner       = comment.user
        @holder      = comment.holder
        @commentable = comment.commentable
      end

      # between draft and published
      after_transition [:draft, :published] => [:draft, :published] do |comment, transition|
        from = transition.from_name
        to   = transition.to_name

        @holder.try :increment!, "#{to}_comcoms_count"
        @holder.try :decrement!, "#{from}_comcoms_count"

        @commentable.try :increment!, "#{to}_comments_count"
        @commentable.try :decrement!, "#{from}_comments_count"
      end

      # to deleted (cascade like query)
      after_transition [:draft, :published] => :deleted do |comment|
        ids = comment.self_and_descendants.map(&:id)
        Comment.where(id: ids).update_all(state: :deleted)
        @owner.try       :recalculate_my_comments_counter!
        @holder.try      :recalculate_comcoms_counters!
        @commentable.try :recalculate_comments_counters!
      end

      # from deleted
      after_transition :deleted => [:draft, :published] do |comment, transition|
        to = transition.to_name

        @owner.try :recalculate_my_comments_counter!

        @holder.try :decrement!, :deleted_comcoms_count
        @holder.try :increment!, "#{to}_comcoms_count"

        @commentable.try :decrement!, :deleted_comments_count
        @commentable.try :increment!, "#{to}_comments_count"
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
the_comments-0.9.9	app/models/concerns/the_comments_states.rb