artists: hide banned artist pages from anonymous users.

Hide banned artist pages from anonymous (logged out) users. Partial
revert of 6b066f2ca. Artists sometimes ask us to remove all their
information from the site, including their artist profile. It's easier
to hide their profile than to explain to Japanese artists that a) we're
under no obligation to remove their profile and b) we need to keep it to
maintain the ban on their content that they asked for.

app/policies/artist_policy.rb

@@ -11,6 +11,10 @@ class ArtistPolicy < ApplicationPolicy
     unbanned?
   end
 
+  def can_view_banned?
+    user.is_member?
+  end
+
   def permitted_attributes
     [:name, :other_names, :other_names_string, :group_name, :url_string, :is_deleted]
   end

app/views/artists/_show.html.erb

@@ -5,26 +5,30 @@
   <div id="a-show">
     <h1>Artist: <%= link_to @artist.pretty_name, posts_path(tags: @artist.name), class: tag_class(@artist.tag) %></h1>
 
-    <% if @artist.wiki_page.present? %>
+    <% if @artist.is_banned? && !policy(@artist).can_view_banned? %>
-      <div class="prose">
+      <p>The artist requested removal of this page.</p>
-        <%= format_text(@artist.wiki_page.body, :disable_mentions => true) %>
+    <% else %>
-      </div>
+      <% if @artist.wiki_page.present? %>
-
+        <div class="prose">
-      <p><%= link_to "View wiki page", @artist.wiki_page %></p>
+          <%= format_text(@artist.wiki_page.body, :disable_mentions => true) %>
-    <% end %>
-
-    <%= yield %>
-
-    <% if @artist.tag.present? && @artist.tag.post_count > 0 %>
-      <div class="recent-posts">
-        <h2>Recent Posts <%= link_to "»", posts_path(tags: @artist.name) %></h2>
-
-        <%= render "posts/partials/common/inline_blacklist" %>
-
-        <div>
-          <%= post_previews_html(@artist.tag.posts.limit(8), tags: @artist.name) %>
         </div>
-      </div>
+
-    <% end %>
+        <p><%= link_to "View wiki page", @artist.wiki_page %></p>
+      <% end %>
+
+      <%= yield %>
+
+      <% if @artist.tag.present? && @artist.tag.post_count > 0 %>
+        <div class="recent-posts">
+          <h2>Recent Posts <%= link_to "»", posts_path(tags: @artist.name) %></h2>
+
+          <%= render "posts/partials/common/inline_blacklist" %>
+
+          <div>
+            <%= post_previews_html(@artist.tag.posts.limit(8), tags: @artist.name) %>
+          </div>
+        </div>
+      <% end %>
+    <% end%>
   </div>
 </div>

app/views/posts/partials/index/_excerpt.html.erb

@@ -1,7 +1,9 @@
 <%# post_set %>
 
 <div id="excerpt" style="display: none;">
-  <% if post_set.artist.present? %>
+  <% if post_set.artist.present? && post_set.artist.is_banned? && !policy(post_set.artist).can_view_banned? %>
+    <p>The artist requested removal of this page.</p>
+  <% elsif post_set.artist.present? %>
     <% post_set.artist.tap do |artist| %>
       <% unless artist.wiki_page.blank? %>
         <div class="prose">