FEATURE: Prefer topic_embed's cached content when summarizing (#25190)

app/services/topic_summarization.rb

@@ -32,7 +32,13 @@ class TopicSummarization
     }
 
     targets_data.map do |(pn, raw, username)|
-      content[:contents] << { poster: username, id: pn, text: raw }
+      raw_text = raw
+
+      if pn == 1 && topic.topic_embed&.embed_content_cache.present?
+        raw_text = topic.topic_embed&.embed_content_cache
+      end
+
+      content[:contents] << { poster: username, id: pn, text: raw_text }
     end
 
     summarization_result = strategy.summarize(content, user, &on_partial_blk)

spec/fabricators/topic_embed_fabricator.rb

@@ -2,5 +2,6 @@
 
 Fabricator(:topic_embed) do
   post
+  embed_url "http://eviltrout.com/123"
   topic { |te| te[:post].topic }
 end

spec/services/topic_summarization_spec.rb

@@ -100,6 +100,24 @@ describe TopicSummarization do
         section = summarization.summarize(topic, user)
         expect(section.summarized_text).to eq(cached_summary_text)
       end
+
+      context "when the topic has embed content cached" do
+        it "embed content is used instead of the raw text" do
+          topic_embed =
+            Fabricate(
+              :topic_embed,
+              topic: topic,
+              embed_content_cache: "<p>hello world new post :D</p>",
+            )
+
+          summarization.summarize(topic, user)
+
+          first_post_data =
+            strategy.content[:contents].detect { |c| c[:id] == topic.first_post.post_number }
+
+          expect(first_post_data[:text]).to eq(topic_embed.embed_content_cache)
+        end
+      end
     end
 
     context "when the content was summarized in multiple chunks" do

spec/support/dummy_custom_summarization.rb

@@ -21,7 +21,10 @@ class DummyCustomSummarization < Summarization::Base
     "dummy"
   end
 
-  def summarize(_content, _user)
+  def summarize(content, _user)
+    @content = content
     @summarization_result.tap { |result| yield(result[:summary]) if block_given? }
   end
+
+  attr_reader :content
 end