feat: add sitemap management feature

- Implement index action to list sitemaps
- Create view for displaying sitemaps with details
- Add helper method for generating sitemap URLs
- Enhance error handling for S3 service errors

This commit introduces a new feature for managing sitemaps in the application. It includes an index view that lists all available sitemaps with their last modified date and size, along with a link to view each sitemap. The error handling for S3 interactions has also been improved to log errors and return appropriate responses.

app/controllers/sitemaps_controller.rb

@@ -1,16 +1,24 @@
 class SitemapsController < ApplicationController
+  include SitemapsHelper
+  before_action :set_bucket_name
+
+  def index
+    @sitemaps = list_sitemaps
+    respond_to do |format|
+      format.html
+      format.xml { render_sitemap_index }
+    end
+  rescue Aws::S3::Errors::ServiceError => e
+    Rails.logger.error "S3 Error: #{e.message}"
+    render status: :internal_server_error
+  end
   def show
     path = params[:path]
-    bucket_name =
-      Rails.env.production? ?
-        ENV.fetch("AWS_BUCKET", Rails.application.credentials.dig(:minio, :bucket)) :
-        ENV.fetch("AWS_DEV_BUCKET", Rails.application.credentials.dig(:minio_dev, :bucket))
     Rails.logger.info "Sitemap: #{path}"
 
     begin
-      s3_client = Aws::S3::Client.new
       response = s3_client.get_object(
-        bucket: bucket_name,
+        bucket: @bucket_name,
         key: "sitemaps/#{path}"
       )
 
@@ -30,4 +38,49 @@ class SitemapsController < ApplicationController
       render status: :internal_server_error
     end
   end
+
+  private
+
+  def set_bucket_name
+    @bucket_name = Rails.env.production? ?
+                     ENV.fetch("AWS_BUCKET", Rails.application.credentials.dig(:minio, :bucket)) :
+                     ENV.fetch("AWS_DEV_BUCKET", Rails.application.credentials.dig(:minio_dev, :bucket))
+  end
+
+  def s3_client
+    @s3_client ||= Aws::S3::Client.new
+  end
+
+  def list_sitemaps
+    response = s3_client.list_objects_v2(
+      bucket: @bucket_name,
+      prefix: "sitemaps/"
+    )
+
+    response.contents.map do |object|
+      {
+        key: object.key.sub("sitemaps/", ""),
+        last_modified: object.last_modified,
+        size: object.size,
+        url: sitemap_url(object.key.sub("sitemaps/", ""))
+      }
+    end.reject { |obj| obj[:key].empty? }
+  end
+
+  def render_sitemap_index
+    base_url = "#{request.protocol}#{request.host_with_port}"
+
+    builder = Nokogiri::XML::Builder.new(encoding: "UTF-8") do |xml|
+      xml.sitemapindex(xmlns: "http://www.sitemaps.org/schemas/sitemap/0.9") do
+        @sitemaps.each do |sitemap|
+          xml.sitemap do
+            xml.loc "#{base_url}/sitemaps/#{sitemap[:key]}"
+            xml.lastmod sitemap[:last_modified].iso8601
+          end
+        end
+      end
+    end
+
+    render xml: builder.to_xml
+  end
 end

app/helpers/sitemaps_helper.rb

@@ -1,2 +1,5 @@
 module SitemapsHelper
+  def sitemap_url(filename)
+    "/sitemaps/#{filename}"
+  end
 end

app/views/sitemaps/index.html.erb

@@ -0,0 +1,43 @@
+<%# app/views/sitemaps/index.html.erb %>
+<div class="container mx-auto px-4 py-8">
+  <div class="max-w-4xl mx-auto">
+    <h1 class="text-3xl font-bold mb-6">Sitemaps Index</h1>
+
+    <div class="bg-white rounded-lg shadow overflow-hidden">
+      <div class="overflow-x-auto">
+        <table class="table w-full">
+          <thead>
+          <tr>
+            <th>Filename</th>
+            <th>Last Modified</th>
+            <th>Size</th>
+            <th>Actions</th>
+          </tr>
+          </thead>
+          <tbody>
+          <% @sitemaps.each do |sitemap| %>
+            <tr class="hover">
+              <td><%= sitemap[:key] %></td>
+              <td><%= sitemap[:last_modified].strftime("%Y-%m-%d %H:%M:%S") %></td>
+              <td><%= number_to_human_size(sitemap[:size]) %></td>
+              <td>
+                <%= link_to "View", sitemap[:url],
+                            class: "btn btn-sm btn-primary",
+                            target: "_blank" %>
+              </td>
+            </tr>
+          <% end %>
+          </tbody>
+        </table>
+      </div>
+    </div>
+
+    <div class="mt-6 bg-base-200 p-4 rounded-lg">
+      <h2 class="text-xl font-semibold mb-2">For Search Engines</h2>
+      <p class="mb-2">Sitemap Index URL:</p>
+      <code class="block bg-base-300 p-2 rounded">
+        <%= sitemaps_url(format: :xml) %>
+      </code>
+    </div>
+  </div>
+</div>

config/routes.rb

@@ -25,6 +25,7 @@ Rails.application.routes.draw do
     get "cities/index"
     get "cities/show"
     get "home/index"
+    get "sitemaps", to: "sitemaps#index"
     get "sitemaps/*path", to: "sitemaps#show", format: false
     get "feed", to: "rss#feed", format: "rss", as: :rss_feed