Redirect logged out users to sign up page for limited posts

closes #6490

Changelog.md

@@ -18,6 +18,7 @@
 * Expose Unicorn's pid option to our configuration system [#6411](https://github.com/diaspora/diaspora/pull/6411)
 * Add stream of all public posts [#6465](https://github.com/diaspora/diaspora/pull/6465)
 * Reload stream when clicking on already active one [#6466](https://github.com/diaspora/diaspora/pull/6466)
+* Sign in user before evaluating post visibility [#6490](https://github.com/diaspora/diaspora/pull/6490)
 
 # 0.5.3.1
 

app/controllers/posts_controller.rb

@@ -11,9 +11,13 @@ class PostsController < ApplicationController
   respond_to :html, :mobile, :json, :xml
 
   rescue_from Diaspora::NonPublic do
+    if user_signed_in?
       respond_to do |format|
         format.all { render template: "errors/not_public", status: 404, layout: "application" }
       end
+    else
+      authenticate_user!
+    end
   end
 
   def show

features/desktop/logged_out_browsing.feature

@@ -21,5 +21,6 @@ Feature: Browsing Diaspora as a logged out user
     Scenario: Visiting a non-public post
       Given "bob@bob.bob" has a non public post with text "my darkest secrets"
       When I open the show page of the "my darkest secrets" post
-      Then I should see the "post not public" message
-      And I should not see "my darkest secrets"
+      Then I should not see "my darkest secrets"
+      When I sign in as "bob@bob.bob"
+      Then I should see "my darkest secrets" within "#single-post-content"

spec/controllers/posts_controller_spec.rb

@@ -25,6 +25,7 @@ describe PostsController, type: :controller do
     end
 
     context "user signed in" do
+      context "given a post that the user is allowed to see" do
         before do
           sign_in :user, alice
           expect(post_service_double).to receive(:post).and_return(@message)
@@ -58,6 +59,19 @@ describe PostsController, type: :controller do
         end
       end
 
+      context "given a post that the user is not allowed to see" do
+        before do
+          sign_in :user, alice
+          expect(post_service_double).to receive(:post).and_raise(Diaspora::NonPublic)
+        end
+
+        it "returns a 404" do
+          get :show, id: @message.id
+          expect(response.code).to eq("404")
+        end
+      end
+    end
+
     context "user not signed in" do
       context "given a public post" do
         before :each do
@@ -81,6 +95,18 @@ describe PostsController, type: :controller do
           expect(response.body).to eq(@status.to_diaspora_xml)
         end
       end
+
+      context "given a limited post" do
+        before do
+          expect(post_service_double).to receive(:post).and_raise(Diaspora::NonPublic)
+        end
+
+        it "forces the user to sign" do
+          get :show, id: @message.id
+          expect(response).to be_redirect
+          expect(response).to redirect_to new_user_session_path
+        end
+      end
     end
   end