show number of files associated with post if > 1

app/models/domain/post.rb

@@ -144,6 +144,10 @@ class Domain::Post < ReduxApplicationRecord
   def title
   end
 
+  sig { abstract.returns(Integer) }
+  def num_post_files_for_view
+  end
+
   sig { overridable.returns(String) }
   def title_for_view
     title || "(unknown)"

app/models/domain/post/bluesky_post.rb

@@ -57,6 +57,11 @@ class Domain::Post::BlueskyPost < Domain::Post
     ["bsky", :rkey]
   end
 
+  sig { override.returns(Integer) }
+  def num_post_files_for_view
+    self.files.group(:file_order).count.size
+  end
+
   sig { override.returns(String) }
   def self.view_prefix
     "bsky"

app/models/domain/post/e621_post.rb

@@ -47,6 +47,11 @@ class Domain::Post::E621Post < Domain::Post
     self.index_page_ids << log_entry.id
   end
 
+  sig { override.returns(Integer) }
+  def num_post_files_for_view
+    1
+  end
+
   sig { override.returns([String, Symbol]) }
   def self.param_prefix_and_attribute
     ["e621", :e621_id]

app/models/domain/post/fa_post.rb

@@ -50,6 +50,11 @@ class Domain::Post::FaPost < Domain::Post
     self.creator
   end
 
+  sig { override.returns(Integer) }
+  def num_post_files_for_view
+    1
+  end
+
   sig { override.returns(T.nilable(T.any(String, Integer))) }
   def domain_id_for_view
     self.fa_id

app/models/domain/post/inkbunny_post.rb

@@ -135,4 +135,9 @@ class Domain::Post::InkbunnyPost < Domain::Post
   def num_favorites_for_view
     num_favs
   end
+
+  sig { override.returns(Integer) }
+  def num_post_files_for_view
+    self.files.group(:file_order).count.size
+  end
 end

app/models/domain/post/sofurry_post.rb

@@ -112,4 +112,10 @@ class Domain::Post::SofurryPost < Domain::Post
   def scanned_post_log_entry_for_view
     last_scan_log_entry
   end
+
+  sig { override.returns(Integer) }
+  def num_post_files_for_view
+    # TODO - this might not be correct, but sofurry is still down
+    1
+  end
 end

app/views/domain/posts/_as_gallery_item.html.erb

@@ -1,10 +1,10 @@
 <div
-  class="m-1 flex min-h-fit flex-col rounded-lg border border-slate-300 bg-slate-50 divide-y divide-slate-300 shadow-sm"
+  class="m-1 flex min-h-fit flex-col rounded-lg border border-slate-300 bg-slate-50 divide-y divide-slate-300 shadow-sm group sm:hover:shadow-md transition-shadow duration-200"
 >
   <div class="flex justify-between p-2">
     <%= render "domain/posts/inline_postable_domain_link", post: post %>
   </div>
-  <div class="flex flex-grow items-center justify-center p-2">
+  <div class="flex flex-grow items-center justify-center p-2 relative">
     <% if (thumbnail_file = gallery_file_for_post(post)) && (thumbnail_path = thumbnail_for_post_path(post)) %>
       <%= link_to domain_post_path(post) do %>
         <%= image_tag thumbnail_path,
@@ -26,6 +26,12 @@
     <% else %>
       <span class="text-sm text-slate-500 italic">No file available</span>
     <% end %>
+    <% if post.num_post_files_for_view > 1 %>
+      <div class="absolute top-0 right-0 bg-slate-600 text-slate-200 text-sm opacity-80 font-bold px-2 py-1 rounded-bl shadow-md flex items-center gap-1 group-hover:opacity-100 transition-opacity duration-200 pointer-events-none whitespace-nowrap z-10">
+        <i class="fa fa-images"></i>
+        <%= post.num_post_files_for_view %>
+      </div>
+    <% end %>
   </div>
   <div>
     <h2 class="p-1 pb-0 text-center text-md">