Merge pull request #1482 from kreuzwerker/feature/agent-icons

Add Agent connection status icons

app/assets/stylesheets/application.css.scss.erb

@@ -318,3 +318,12 @@ $service-colors: (
   color: yellow;
   text-decoration: underline;
 }
+
+.glyphicon-flipped {
+  -ms-transform: translateZ(0);
+  -webkit-transform: translateZ(0);
+  transform: translateZ(0);
+  -ms-transform: scaleX(-1);
+  -webkit-transform: scaleX(-1);
+  transform: scaleX(-1);
+}

app/helpers/agent_helper.rb

@@ -57,4 +57,46 @@ module AgentHelper
       'maybe'.freeze
     end
   end
+
+  def agent_type_icon(agent, agents)
+    receiver_count = links_counter_cache(agents)[:links_as_receiver][agent.id] || 0
+    control_count  = links_counter_cache(agents)[:control_links_as_controller][agent.id] || 0
+    source_count   = links_counter_cache(agents)[:links_as_source][agent.id] || 0
+
+    if control_count > 0 && receiver_count > 0
+      content_tag('span') do
+        concat icon_tag('glyphicon-arrow-right')
+        concat tag('br')
+        concat icon_tag('glyphicon-new-window', class: 'glyphicon-flipped')
+      end
+    elsif control_count > 0 && receiver_count == 0
+      icon_tag('glyphicon-new-window', class: 'glyphicon-flipped')
+    elsif receiver_count > 0 && source_count == 0
+      icon_tag('glyphicon-arrow-right')
+    elsif receiver_count == 0 && source_count > 0
+      icon_tag('glyphicon-arrow-left')
+    elsif receiver_count > 0 && source_count > 0
+      icon_tag('glyphicon-transfer')
+    else
+      icon_tag('glyphicon-unchecked')
+    end
+  end
+
+  private
+
+  def links_counter_cache(agents)
+    @counter_cache ||= {}
+    @counter_cache[agents.__id__] ||= {}.tap do |cache|
+      agent_ids = agents.map(&:id)
+      cache[:links_as_receiver] = Hash[Link.where(receiver_id: agent_ids)
+                                           .group(:receiver_id)
+                                           .pluck('receiver_id', 'count(receiver_id) as id')]
+      cache[:links_as_source]   = Hash[Link.where(source_id: agent_ids)
+                                           .group(:source_id)
+                                           .pluck('source_id', 'count(source_id) as id')]
+      cache[:control_links_as_controller] = Hash[ControlLink.where(controller_id: agent_ids)
+                                                            .group(:controller_id)
+                                                            .pluck('controller_id', 'count(controller_id) as id')]
+    end
+  end
 end

app/views/agents/_table.html.erb

@@ -1,6 +1,7 @@
 <div class='table-responsive'>
   <table class='table table-striped'>
     <tr>
+      <th></th>
       <th><%= sortable_column 'name', 'asc' %></th>
       <th><%= sortable_column 'created_at', 'desc', name: 'Age' %></th>
       <th>Schedule</th>
@@ -14,6 +15,9 @@
 
     <% @agents.each do |agent| %>
       <tr>
+        <td class='<%= "agent-unavailable" if agent.unavailable? %>'>
+          <%= agent_type_icon(agent, @agents) %>
+        </td>
         <td class='<%= "agent-unavailable" if agent.unavailable? %>'>
           <%= link_to agent.name, agent_path(agent, return: (defined?(return_to) && return_to) || request.path) %>
           <br/>