From ee3b391d0c6692b49154775b75af20e014ec7cb9 Mon Sep 17 00:00:00 2001
From: Kouhei Sutou <kou@clear-code.com>
Date: Thu, 22 Dec 2016 14:47:19 +0900
Subject: [PATCH] Support dilldown by tag

---
 app/controllers/documents_controller.rb | 11 +++++++++--
 app/views/documents/index.html.erb      | 17 +++++++++++++++--
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/app/controllers/documents_controller.rb b/app/controllers/documents_controller.rb
index cb8944a..6f8f00c 100644
--- a/app/controllers/documents_controller.rb
+++ b/app/controllers/documents_controller.rb
@@ -5,9 +5,16 @@ class DocumentsController < ApplicationController
   # GET /documents.json
   def index
     @query = params[:query]
+    @tag = params[:tag]
+
     searcher = DocumentsSearcher.new
-    @result_set = searcher.search.
-      query(@query).
+    request = searcher.search.query(@query)
+    if @tag.present?
+      request = request.filter("tags @ %{tag}", tag: @tag)
+    end
+    @result_set = request.
+      drilldowns("tag").keys("tags").
+      drilldowns("tag").sort_keys("-_nsubrecs").
       result_set
   end
 
diff --git a/app/views/documents/index.html.erb b/app/views/documents/index.html.erb
index fe779cb..a5eb335 100644
--- a/app/views/documents/index.html.erb
+++ b/app/views/documents/index.html.erb
@@ -5,10 +5,21 @@
 <p><%= @result_set.n_hits %> records</p>
 
 <%= form_tag(documents_path, method: "get") do %>
+  <%= hidden_field_tag "tag", @tag %>
   <%= search_field_tag "query", @query %>
   <%= submit_tag "Search" %>
 <% end %>
 
+<nav>
+  <% @result_set.drilldowns["tag"].records.each do |record| %>
+  <%= link_to_unless @tag == record._key,
+                     "#{record._key} (#{record._nsubrecs})",
+                     url_for(query: @query, tag: record._key) %>
+  <% end %>
+  <%= link_to "タグ絞り込み解除",
+              url_for(query: @query) %>
+</nav>
+
 <table>
   <thead>
     <tr>
@@ -27,8 +38,10 @@
         <td><%= document.content %></td>
         <td>
           <ul>
-          <% document.tags.each do |tag| %>
-            <li><%= tag.name %></li>
+          <% record.tags.each do |tag| %>
+            <li><%= link_to_unless @tag == tag,
+                                   tag,
+                                   url_for(query: @query, tag: tag) %></li>
           <% end %>
           </ul>
         </td>