track searches that return no results

app/assets/javascripts/utility.js

@@ -99,6 +99,21 @@
     return string.replace(/([.?*+^$[\]\\(){}|-])/g, "\\$1");
   }
 
+  Danbooru.get_url_parameter = function(sParam) {
+    var sPageURL = decodeURIComponent(window.location.search.substring(1)),
+        sURLVariables = sPageURL.split('&'),
+        sParameterName,
+        i;
+
+    for (i = 0; i < sURLVariables.length; i++) {
+      sParameterName = sURLVariables[i].split('=');
+
+      if (sParameterName[0] === sParam) {
+        return sParameterName[1] === undefined ? true : sParameterName[1];
+      }
+    }
+  };
+
   String.prototype.hash = function() {
     var hash = 5381, i = this.length;
 

app/controllers/explore/posts_controller.rb

@@ -13,6 +13,10 @@ module Explore
       @search_service = PopularSearchService.new(@date, params[:scale] || "day")
     end
 
+    def missed_searches
+      @search_service = MissedSearchService.new
+    end
+
     def intro
       @presenter = IntroPresenter.new
       render :layout => "blank"

app/helpers/posts_helper.rb

@@ -1,4 +1,13 @@
 module PostsHelper
+  def missed_post_search_count_js
+    return nil unless Danbooru.config.enable_post_search_counts
+    
+    session_id = session.id
+    digest = OpenSSL::Digest.new("sha256")
+    sig = OpenSSL::HMAC.hexdigest(digest, Danbooru.config.shared_remote_key, ",#{session_id}")
+    return render("posts/partials/index/missed_search_count", session_id: session_id, sig: sig)
+  end
+
   def post_search_count_js
     return nil unless Danbooru.config.enable_post_search_counts
     

app/logical/missed_search_service.rb

@@ -0,0 +1,22 @@
+# queries reportbooru to find missed post searches
+class MissedSearchService
+  def each_search(&block)
+    fetch_data.scan(/(.+?) (\d+)\.0\n/).each(&block)
+  end
+
+  def fetch_data
+    # Cache.get("ms", 1.minute) do
+      url = URI.parse("#{Danbooru.config.report_server}/missed_searches")
+      response = ""
+      Net::HTTP.start(url.host, url.port, :use_ssl => url.is_a?(URI::HTTPS)) do |http|
+        http.read_timeout = 1
+        http.request_get(url.request_uri) do |res|
+          if res.is_a?(Net::HTTPSuccess)
+            response = res.body
+          end
+        end
+      end
+      response
+    # end
+  end
+end

app/views/explore/posts/missed_searches.html.erb

@@ -0,0 +1,28 @@
+<div id="c-explore-posts">
+  <div id="a-index">
+    <h1>Missed Searches (past seven days)</h1>
+
+    <table class="striped" width="100%">
+      <thead>
+        <tr>
+          <th>Tags</th>
+          <th style="text-align: right;">Count</th>
+        </tr>
+      </thead>
+      <tbody>
+        <% @search_service.each_search do |tags, count| %>
+          <tr class="category-<%= Tag.category_for(tags) %>">
+            <td><%= link_to tags, posts_path(:tags => tags) %></td>
+            <td style="text-align: right;"><%= count.to_i %></td>
+          </tr>
+        <% end %>
+      </tbody>
+    </table>
+  </div>
+</div>
+
+<%= render "posts/partials/common/secondary_links" %>
+
+<% content_for(:page_title) do %>
+  Missed Searches - <%= Danbooru.config.app_name %>
+<% end %>

app/views/posts/index.html.erb

@@ -59,4 +59,5 @@
   <% if @post_set.has_wiki? %>
     <meta name="description" content="<%= @post_set.wiki_page.presenter.blurb %>"></meta>
   <% end %>
+  <%= missed_post_search_count_js %>
 <% end %>

app/views/posts/partials/common/_search.html.erb

@@ -13,6 +13,7 @@
     <% if params[:random] %>
       <%= hidden_field_tag :random, params[:random] %>
     <% end %>
+    <%= hidden_field_tag "ms", "1" %>
     <%= submit_tag "Go", :name => nil %>
   <% end %>
 </section>

app/views/posts/partials/index/_missed_search_count.html.erb

@@ -0,0 +1,12 @@
+<script type="text/javascript">
+  $(function() {
+    var tags = $("#tags").val();
+    if (Danbooru.get_url_parameter("ms") === "1" && tags && tags.length > 0 && $(".post-preview").size() < 10) {
+      $.post("<%= Danbooru.config.report_server %>/missed_searches", {
+        session_id: "<%= session_id %>",
+        tags: $("#tags").val(),
+        sig: "<%= sig %>"
+      });
+    }
+  });
+</script>

config/routes.rb

@@ -46,6 +46,7 @@ Rails.application.routes.draw do
       collection do
         get :popular
         get :searches
+        get :missed_searches
         get :hot
         get :intro
       end