feature/Only display more button for snippets that have a preview

Author: LewisYoul

app/models/snippet.rb

@@ -48,13 +48,14 @@ def liked_by?(user)
     likes.find_by_user_id(user&.id).present?
   end
 
-  def language_label
-    "<span style='border-radius: 5px; position: absolute; top: -13px; right: 25px; border: 1px solid lightgrey; font-family: monospace; padding: 4px 28px 4px 10px; background-color: snow;'><i style='position: absolute; right: 7px;' class='devicon-ruby-plain colored'></i>#{ language.name }</span>"
-  end
 
   # Prevent needing to do on the fly by saving to db
   def preview
-    body.split("\n").first(15).join("\n")
+   @preview ||=  body.split("\n").first(15).join("\n")
+  end
+
+  def has_preview?
+    preview != body
   end
 
   def client_id

app/views/snippets/_snippet_preview.html.erb

@@ -31,9 +31,11 @@
     </div>
 
     <div class="relative">
-      <div class="transition text-gray-500 hover:underline absolute border rounded-md bottom-2 right-2 z-3 bg-white text-sm px-2 py-1">
-        <span>More...</span>
-      </div>
+      <% if snippet.has_preview? %>
+        <div title="View the entire snippet" class="transition text-gray-500 hover:underline absolute border rounded-md bottom-2 right-2 z-3 bg-white text-sm px-2 py-1">
+          <span>More...</span>
+        </div>
+      <% end %>
       <%= render partial: 'shared/codemirror', locals: { code: snippet.preview, mode: snippet.language.slug, read_only: true, classes: 'snippet--content' } %>
     </div>
   </div>