Annotate the History list with each revision's lifecycle

Each row in nodes#show's History section now carries terse badges
from the action log: created, published, and restored (rollback
re-promotion), with date and actor, rendered from entry metadata
alone. Backfilled entries wear the inferred marker, so
reconstructed provenance stays distinguishable from witnessed
history. A revision that was published and later restored shows
both badges chronologically -- its true biography.

Only create and publish entries carry page_id; trash, restore, and
destroy annotate the node's own log zoom instead of any single
revision, by design.

3 files changed, 33 insertions, 1 deletions

diff --git a/app/controllers/nodes_controller.rb b/app/controllers/nodes_controller.rb
index 021f8ff..6caa827 100644
--- a/app/controllers/nodes_controller.rb
+++ b/app/controllers/nodes_controller.rb
@@ -62,6 +62,9 @@ class NodesController < ApplicationController
   def show
     @page = @node.draft || @node.head
     @translations = @page.translation_summary
+    @page_actions = NodeAction.where(:page_id => @node.pages.select(:id))
+                              .order(:occurred_at, :id)
+                              .group_by(&:page_id)
   end
 
   def edit
diff --git a/app/helpers/node_actions_helper.rb b/app/helpers/node_actions_helper.rb
index c829dff..eb761e3 100644
--- a/app/helpers/node_actions_helper.rb
+++ b/app/helpers/node_actions_helper.rb
@@ -59,6 +59,32 @@ module NodeActionsHelper
     end
   end
 
+  def revision_lifecycle_badges actions
+    return "" if actions.blank?
+
+    badges = actions.map do |action|
+      key = case action.action
+            when "create"  then "node_actions.revision_created"
+            when "publish" then action.metadata["via"] == "revision" ?
+                                  "node_actions.revision_restored" :
+                                  "node_actions.revision_published"
+            end
+      next unless key
+
+      badge = h(t(key, :date => action.occurred_at.strftime("%Y-%m-%d"),
+                       :actor => action.actor_name))
+      if action.inferred_from
+        badge = safe_join([badge, content_tag(:span, t("node_actions.backfilled"),
+                                               :class => "node_action_inferred",
+                                               :title => action.inferred_from)], " ")
+      end
+      badge
+    end.compact
+
+    return "" if badges.empty?
+    safe_join(["— ", safe_join(badges, " · ")])
+  end
+
   private
 
   def revision_ref action, key
diff --git a/app/views/nodes/show.html.erb b/app/views/nodes/show.html.erb
index 4d4f6d5..af05778 100644
--- a/app/views/nodes/show.html.erb
+++ b/app/views/nodes/show.html.erb
@@ -229,7 +229,10 @@
         </summary>
         <ul>
           <% @node.pages.order(:revision).each do |page| %>
-            <li><%= link_to "##{page.revision} — #{page.title} (#{page.editor.try(:login)}, #{page.updated_at})", node_revision_path(@node, page) %></li>
+            <li>
+              <%= link_to "##{page.revision} — #{page.title} (#{page.editor.try(:login)}, #{page.updated_at})", node_revision_path(@node, page) %>
+              <span class="revision_lifecycle"><%= revision_lifecycle_badges(@page_actions[page.id]) %></span>
+            </li>
           <% end %>
         </ul>
       </details>