Add section on indexing process

Closes #2328

app/views/layouts/application.html.erb

@@ -10,9 +10,11 @@
   <div class="container">
     <%= render partial: "shared/navbar" %>  	
     <%= render partial: "shared/flash_messages", flash: flash %>
-    <%= yield %>
+    <main>
+      <%= yield %>
+    </main>
   </div>
-  <div class="deployment-version">
+  <div class="deployment-version" role="contentinfo">
     Version <span title="<%= GIT_SHA %>"><%= BRANCH %> last updated <%= LAST_DEPLOYED %>.</span>
   </div>
 </body>

app/views/pages/index.html.erb

@@ -1 +1,22 @@
 <h1>PUL Bibliographic Data Web Service</h1>
+<h2>Indexing Process</h2>
+<table class="table table-condensed">
+  <thead>
+    <tr>
+      <th>Solr collection</th>
+      <th>Last dump indexed</th>
+      <th>Timestamp</th>
+      <th>In progress</th>
+    </tr>
+  </thead>
+  <tbody>
+  <% IndexManager.all.each do |index_manager| %>
+    <tr>
+      <td><%= index_manager.solr_collection %></td>
+      <td><%= index_manager.last_dump_completed_id ? link_to(index_manager.last_dump_completed_id, dump_url(index_manager.last_dump_completed_id, format: :json)) : '' %></td>
+      <td><%= index_manager.updated_at %></td>
+      <td><%= index_manager.in_progress %></td>
+    </tr>
+  <% end %>
+  </tbody>
+</table>

spec/views/pages/index.html.erb_spec.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+require "rails_helper"
+
+RSpec.describe "pages/index", type: :view do
+  it 'renders the header' do
+    render
+    expect(rendered).to match(/<h1>PUL Bibliographic Data Web Service<\/h1>/)
+  end
+  it 'includes a section on the indexing process' do
+    render
+    expect(rendered).to match(/<h2>Indexing Process<\/h2>/)
+    expect(rendered).to match(/<th>Last dump indexed<\/th>/)
+    expect(rendered).to match(/<th>Timestamp<\/th>/)
+    expect(rendered).to match(/<th>In progress<\/th>/)
+  end
+  context 'with index managers' do
+    let!(:index_manager1) { FactoryBot.create(:index_manager, solr_collection: 'daily_indexing', last_dump_completed: FactoryBot.create(:incremental_dump)) }
+    let!(:index_manager2) { FactoryBot.create(:index_manager, solr_collection: 'rebuild_indexing', last_dump_completed: FactoryBot.create(:full_dump)) }
+
+    it 'includes the id of the last dump indexed' do
+      render
+
+      expect(rendered).to match(/#{index_manager1.last_dump_completed_id}/)
+      expect(rendered).to match(/#{index_manager2.last_dump_completed_id}/)
+      expect(rendered).to match(index_manager1.solr_collection)
+      expect(rendered).to have_link(index_manager1.last_dump_completed_id.to_s, href: "http://test.host/dumps/#{index_manager1.last_dump_completed_id}.json")
+    end
+  end
+end