seperate interactions from posts

Lazily load post interactions on show page
hella refactorz

app/controllers/participations_controller.rb

@@ -1,68 +0,0 @@
-#   Copyright (c) 2010-2011, Diaspora Inc.  This file is
-#   licensed under the Affero General Public License version 3 or later.  See
-#   the COPYRIGHT file.
-
-require Rails.root.join("app", "presenters", "post_presenter")
-
-class ParticipationsController < ApplicationController
-  include ApplicationHelper
-  before_filter :authenticate_user!
-
-  respond_to :mobile,
-             :json
-
-  def create
-    @participation = current_user.participate!(target) if target
-
-    if @participation
-      respond_to do |format|
-        format.mobile { redirect_to post_path(@participation.post_id) }
-        format.json { render :json => ExtremePostPresenter.new(@participation.parent, current_user), :status => 201 }
-      end
-    else
-      render :nothing => true, :status => 422
-    end
-  end
-
-  def destroy
-    @participation = Participation.where(:id => params[:id], :author_id => current_user.person.id).first
-
-    if @participation
-      current_user.retract(@participation)
-      respond_to do |format|
-        format.json { render :json => ExtremePostPresenter.new(@participation.parent, current_user), :status => 202 }
-      end
-    else
-      respond_to do |format|
-        format.mobile { redirect_to :back }
-        format.json { render :nothing => true, :status => 403}
-      end
-    end
-  end
-
-  def index
-    if target
-      @participations = target.participations.includes(:author => :profile)
-      @people = @participations.map(&:author)
-
-      respond_to do |format|
-        format.all{ render :layout => false }
-        format.json{ render :json => @participations.as_api_response(:backbone) }
-      end
-    else
-      render :nothing => true, :status => 404
-    end
-  end
-
-  protected
-
-  def target
-    @target ||= if params[:post_id]
-      current_user.find_visible_shareable_by_id(Post, params[:post_id])
-    else
-      comment = Comment.find(params[:comment_id])
-      comment = nil unless current_user.find_visible_shareable_by_id(Post, comment.commentable_id)
-      comment
-    end
-  end
-end