Add a search form

.rubocop.yml

@@ -5,4 +5,7 @@ Layout:
   Enabled: false
 
 Metrics/BlockLength:
-  Max: 50
+  Max: 50
+
+Metrics/MethodLength:
+  Max: 40

app/controllers/messages_controller.rb

@@ -1,17 +1,25 @@
 class MessagesController < ApplicationController
+  PER_PAGE = 50
+
   # GET /messages or /messages.json
   def index
     query = params[:q]
-    if query
-      # %> and <-> are defined by pg_trgm.
-      # https://www.postgresql.org/docs/17/pgtrgm.html
-      @messages = Message.find_by_sql([
-        'SELECT * FROM messages WHERE body %> ? ORDER BY body <-> ? LIMIT 20',
-        query, query,
-      ])
+    unless query
+      @messages = []
+      return
+    end
+
+    page = params[:page].to_i
+    list_ids = get_list_ids(params)
+
+    # %> and <-> are defined by pg_trgm.
+    # https://www.postgresql.org/docs/17/pgtrgm.html
+    message_where = if Rails.env.production?
+      Message.where('body %> ? AND list_id IN (?) ORDER BY body <-> ?', query, list_ids, query)
     else
-      @messages = Message.all
+      Message.where('body LIKE ? AND list_id IN (?)', "%#{query}%", list_ids)
     end
+    @messages = message_where.offset(page * PER_PAGE).limit(PER_PAGE)
   end
 
   # GET /messages/1 or /messages/1.json
@@ -23,4 +31,15 @@ def show
       @message = Message.find_by(list_id: list.id, list_seq: params[:list_seq])
     end
   end
+
+  private
+  def get_list_ids(params)
+    list_ids = []
+    ['ruby-talk', 'ruby-core', 'ruby-list', 'ruby-dev'].each do |name|
+      if params[name.tr('-', '_').to_sym] == '1'
+        list_ids << List.find_by_name(name).id
+      end
+    end
+    list_ids
+  end
 end

app/views/messages/index.html.erb

@@ -1,14 +1,33 @@
 <p style="color: green"><%= notice %></p>
 
-<h1>Messages</h1>
-
-<ul>
-  <% @messages.each do |message| %>
-    <li>
-      <% list_name = List.find_by_id(message.list_id).name %>
-      <%= list_name %>:<%= message.list_seq %>
-      <%= link_to message.subject, "/#{list_name}/#{message.list_seq}" %>
-      <small><%= message.body %></small>
-    </li>
-  <% end %>
-</ul>
+<h1>blade.ruby-lang.org</h1>
+
+<%= form_with(method: :get) do |form| %>
+  <%= form.text_field :q, { value: params[:q] }  %>
+  <%= form.submit "Search" %>
+
+  <p>
+    <%
+      [
+        [:ruby_talk, 'ruby-talk (English)'],
+        [:ruby_core, 'ruby-core (For developing Ruby iself, English)'],
+        [:ruby_list, 'ruby-list (Japanese)'],
+        [:ruby_dev, 'ruby-dev (For developing Ruby itself, Japanese)'],
+      ].each do |name, label|
+    %>
+      <span>
+        <%= form.check_box name, {checked: params[name] == '1' } %>
+        <%= form.label name, label %>
+      </span>
+    <% end %>
+  </p>
+<% end %>
+
+<% @messages.each do |message| %>
+  <div>
+    <% list_name = List.find_by_id(message.list_id).name %>
+    <%= list_name %>:<%= message.list_seq %>
+    <%= link_to message.subject, "/#{list_name}/#{message.list_seq}" %>
+    <small><%= message.body %></small>
+  </div>
+<% end %>