used and recent

app/models/user.rb

@@ -64,6 +64,28 @@ class User < ApplicationRecord
     json['rtype'] = 'mapper'
     json
   end
+  
+  def recentMetacodes
+    array = []
+    self.topics.sort{|a,b| b.created_at <=> a.created_at }.each do |t|
+      if array.length < 5 and array.index(t.metacode_id) == nil
+        array.push(t.metacode_id)
+      end
+    end
+    array
+  end
+
+  def mostUsedMetacodes
+    self.topics.to_a.reduce({}) { |memo, topic| 
+      if memo[topic.metacode_id] == nil
+        memo[topic.metacode_id] = 1 
+      else 
+        memo[topic.metacode_id] = memo[topic.metacode_id] + 1
+      end
+      
+      memo
+    }.to_a.sort{ |a, b| b[1] <=> a[1] }.map{|i| i[0]}.slice(0, 5)
+  end
 
   # generate a random 8 letter/digit code that they can use to invite people
   def generate_code

app/views/shared/_metacodeoptions.html.erb

@@ -5,6 +5,32 @@
   
 <div id="metacodeOptions">
 <ul>
+  <li>
+    <span>Most Used</span>
+    <div class="expandMetacodeSet"></div>
+    <ul>
+    	<% set.metacodes.sort { |a, b| a.name <=> b.name }.each do |m| %>
+		  <li data-id="<%= m.id.to_s %>">
+		    <img width="24" height="24" src="<%= asset_path m.icon %>" alt="<%= m.name %>" />
+		    <div class="mSelectName"><%= m.name %></div>
+		    <div class="clearfloat"></div>
+		  </li>
+		<% end %>
+    </ul>
+  </li>
+  <li>
+    <span>Recently Used</span>
+    <div class="expandMetacodeSet"></div>
+    <ul>
+    	<% set.metacodes.sort { |a, b| a.name <=> b.name }.each do |m| %>
+		  <li data-id="<%= m.id.to_s %>">
+		    <img width="24" height="24" src="<%= asset_path m.icon %>" alt="<%= m.name %>" />
+		    <div class="mSelectName"><%= m.name %></div>
+		    <div class="clearfloat"></div>
+		  </li>
+		<% end %>
+    </ul>
+  </li>
   <% MetacodeSet.order("name").all.each do |set| %>
   <li>
     <span><%= set.name %></span>