Make PostPresenter inherit from BasePresenter

closes #6315

Changelog.md

@@ -9,6 +9,7 @@
 * Refactor HomeController#toggle\_mobile [#6260](https://github.com/diaspora/diaspora/pull/6260)
 * Extract CommentService from CommentsController [#6307](https://github.com/diaspora/diaspora/pull/6307)
 * Extract user/profile discovery into the diaspora\_federation-rails gem [#6310](https://github.com/diaspora/diaspora/pull/6310)
+* Refactor PostPresenter [#6315](https://github.com/diaspora/diaspora/pull/6315)
 
 ## Bug fixes
 * Fix indentation and a link title on the default home page [#6212](https://github.com/diaspora/diaspora/pull/6212)

app/presenters/post_interaction_presenter.rb

@@ -7,7 +7,7 @@ class PostInteractionPresenter
   def as_json(_options={})
     {
       likes:          as_api(@post.likes),
-      reshares:       PostPresenter.collection_json(@post.reshares, @current_user),
+      reshares:       PostPresenter.as_collection(@post.reshares, :as_json, @current_user),
       comments:       CommentPresenter.as_collection(@post.comments.order("created_at ASC")),
       participations: as_api(participations),
       comments_count: @post.comments_count,

app/presenters/post_presenter.rb

@@ -1,17 +1,13 @@
-class PostPresenter
+class PostPresenter < BasePresenter
   include PostsHelper
 
-  attr_accessor :post, :current_user
+  attr_accessor :post
 
   def initialize(post, current_user=nil)
     @post = post
     @current_user = current_user
   end
 
-  def self.collection_json(collection, current_user)
-    collection.map {|post| PostPresenter.new(post, current_user) }
-  end
-
   def as_json(_options={})
     @post.include_root_in_json = false
     @post.as_json(only: directly_retrieved_attributes).merge(non_directly_retrieved_attributes)