Reshare the absolute root of a post

Changelog.md

@@ -44,6 +44,7 @@ The default for including jQuery from a CDN has changed. If you want to continue
 * Pull punycode.js from rails-assets.org [#5263](https://github.com/diaspora/diaspora/pull/5263)
 * Redesign profile page and port to Bootstrap [#4657](https://github.com/diaspora/diaspora/pull/4657)
 * Unify stream selection links in the left sidebar [#5271](https://github.com/diaspora/diaspora/pull/5271)
+* Always reshare absolute root of a post [#5276](https://github.com/diaspora/diaspora/pull/5276)
 
 ## Bug fixes
 * orca cannot see 'Add Contact' button [#5158](https://github.com/diaspora/diaspora/pull/5158)

app/controllers/reshares_controller.rb

@@ -3,7 +3,13 @@ class ResharesController < ApplicationController
   respond_to :json
 
   def create
-    @reshare = current_user.build_post(:reshare, :root_guid => params[:root_guid])
+    post = Post.where(:guid => params[:root_guid]).first
+    if post.is_a? Reshare
+      @reshare = current_user.build_post(:reshare, :root_guid => post.absolute_root.guid)
+    else
+      @reshare = current_user.build_post(:reshare, :root_guid => params[:root_guid])
+    end
+
     if @reshare.save
       current_user.add_to_streams(@reshare, current_user.aspects)
       current_user.dispatch_post(@reshare, :url => post_url(@reshare), :additional_subscribers => @reshare.root_author)

spec/controllers/reshares_controller_spec.rb

@@ -54,6 +54,19 @@ describe ResharesController, :type => :controller do
           expect(response.body.strip).to be_empty
         end
       end
+
+      context 'resharing another user\'s reshare' do
+        before do
+          @root = @post
+          @post = FactoryGirl.create(:reshare, :root => @root, :author => alice.person)
+        end
+
+        it 'reshares the absolute root' do
+          post_request!
+          expect(@post.reshares.count).to eq(0)
+          expect(@root.reshares.count).to eq(2)
+        end
+      end
     end
   end
 end