From 4e322bd6e9edb510d3c684b6c4e88e99243bf6d4 Mon Sep 17 00:00:00 2001
From: songtianlun <tianlun.song@foxmail.com>
Date: Wed, 5 Mar 2025 14:59:02 +0800
Subject: [PATCH] feat: add JSON feed support for weather art

- Implement JSON feed generation in the RssController
- Add new API endpoint to serve JSON feed
- Update RSS feed view to include hidden machine-readable data

This commit introduces a new feature that allows the application to
serve weather art data in JSON format. The JSON feed includes
metadata such as the title, description, and additional custom
fields for better integration with other services. The changes
also enhance the existing RSS feed by embedding machine-readable
data within the HTML structure, improving accessibility and
usability for automated systems.
---
 app/controllers/rss_controller.rb | 31 +++++++++++++++++++++++++++++++
 app/views/rss/feed.rss.builder    | 29 ++++++++++++++++++++++++++++-
 2 files changed, 59 insertions(+), 1 deletion(-)

diff --git a/app/controllers/rss_controller.rb b/app/controllers/rss_controller.rb
index 2440cb3..6181b3c 100644
--- a/app/controllers/rss_controller.rb
+++ b/app/controllers/rss_controller.rb
@@ -4,6 +4,37 @@ class RssController < ApplicationController
 
     respond_to do |format|
       format.rss { render layout: false }
+      format.json { render json: generate_json_feed }
     end
   end
+
+  private
+
+  def generate_json_feed
+    {
+      version: "https://jsonfeed.org/version/1.1",
+      title: "Today AI Weather Art",
+      home_page_url: root_url,
+      feed_url: rss_feed_url(format: :json),
+      items: @weather_arts.map do |art|
+        {
+          id: city_weather_art_url(art.city, art),
+          url: city_weather_art_url(art.city, art),
+          title: "#{art.city.full_name} Weather Art",
+          content_html: "<p>#{art.description}</p>",
+          date_published: art.created_at.iso8601,
+          image: art.image.attached? ? rails_blob_url(art.webp_image.processed) : nil,
+          # 自定义字段
+          _weather: {
+            country: art.city&.country&.name,
+            city: art.city&.name,
+            state: art.city&.state&.name,
+            description: art.description,
+            prompt: art.prompt,
+            date: art.weather_date&.strftime("%Y-%m-%d")
+          }
+        }
+      end
+    }
+  end
 end
diff --git a/app/views/rss/feed.rss.builder b/app/views/rss/feed.rss.builder
index 8f8c53a..6aabc10 100644
--- a/app/views/rss/feed.rss.builder
+++ b/app/views/rss/feed.rss.builder
@@ -13,7 +13,34 @@ xml.rss version: "2.0",
     @weather_arts.each do |art|
       xml.item do
         xml.title "#{art.city.full_name} Weather Art"
-        xml.description "Weather art for #{art.city.full_name} on #{art.weather_date&.strftime('%Y-%m-%d')}"
+        # xml.description "Weather art for #{art.city.full_name} on #{art.weather_date&.strftime('%Y-%m-%d')}"
+        xml.description do
+          content = <<~HTML
+            <div class="weather-art-data">
+              <p>Weather art for #{art.city.full_name} on #{art.weather_date&.strftime('%Y-%m-%d')}</p>
+            #{'  '}
+              <!-- 添加隐藏的机器可读数据，但使用data属性 -->
+              <div style="display:none"#{' '}
+                   data-country="#{CGI.escapeHTML(art.city&.country&.name.to_s)}"
+                   data-state="#{CGI.escapeHTML(art.city&.state&.name.to_s)}"
+                   data-city="#{CGI.escapeHTML(art.city&.name.to_s)}"
+                   data-weather-date="#{art.weather_date&.strftime('%Y-%m-%d')}"
+                   data-description="#{CGI.escapeHTML(art.description.to_s)}"
+                   data-prompt="#{CGI.escapeHTML(art.prompt.to_s)}">
+              </div>
+            #{'  '}
+              <!-- 或使用Meta标签形式 -->
+              <meta name="weather:country" content="#{CGI.escapeHTML(art.city&.country&.name.to_s)}">
+              <meta name="weather:state" content="#{CGI.escapeHTML(art.city&.state&.name.to_s)}">
+              <meta name="weather:city" content="#{CGI.escapeHTML(art.city&.name.to_s)}">
+              <meta name="weather:date" content="#{art.weather_date&.strftime('%Y-%m-%d')}">
+              <meta name="weather:description" content="#{CGI.escapeHTML(art.description.to_s)}">
+              <meta name="weather:prompt" content="#{CGI.escapeHTML(art.prompt.to_s)}">
+            </div>
+          HTML
+
+          xml.cdata!(content)
+        end
         xml.pubDate art.created_at.to_fs(:rfc822)
         xml.link city_weather_art_url(art.city, art)
         xml.guid city_weather_art_url(art.city, art)