add support for post version queries

app/views/post_versions/_listing.html.erb

@@ -18,7 +18,7 @@
     </thead>
     <tbody>
       <% post_versions.each do |post_version| %>
-        <tr id="post-version-<%= post_version.id %>">
+        <tr id="post-version-<%= post_version.id %>" <% if params[:hilite].to_i == post_version.id %>class="hilite"<% end %>>
           <td><%= link_to("#{post_version.post_id}.#{post_version.id}", post_path(post_version.post_id)) %></td>
           <td><%= compact_time(post_version.updated_at) %></td>
           <td>

app/views/reports/post_versions.html.erb

@@ -0,0 +1,27 @@
+<div id="c-reports">
+  <div id="a-post-versions">
+    <h1>Post Changes Report</h1>
+
+    <p>You can search all post changes to find when and where a tag was added or removed. Because these queries can take a long time to generate the results will be emailed to you. Only the 1,000 most recent changes will be returned.</p>
+
+    <%= form_tag(reports_post_versions_create_path, :method => :post, :class => "simple_form") do %>
+      <div class="input">
+        <label for="tag">Tag</label>
+        <%= text_field_tag "tag" %>
+        <%= select_tag "type", options_for_select(%w(added removed)) %>
+      </div>
+
+      <div class="input">
+        <label for="Email">Email</label>
+        <%= text_field_tag "email", CurrentUser.user.email %>
+      </div>
+
+      <%= submit_tag "Submit" %>
+    <% end %>
+
+  </div>
+</div>
+
+<% content_for(:page_title) do %>
+  Post Changes Report - <%= Danbooru.config.app_name %>
+<% end %>

app/views/static/site_map.html.erb

@@ -64,6 +64,7 @@
         <% if Danbooru.config.report_server %>
           <li><%= link_to("Top Searches", searches_explore_posts_path) %></li>
           <li><%= link_to("Missed Searches", missed_searches_explore_posts_path) %></li>
+          <li><%= link_to("Post Changes", reports_post_versions_path) %></li>
         <% end %>
       </ul>
     </section>