95 lines
2.9 KiB
Ruby
95 lines
2.9 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
module DiscourseAi
|
|
module Embeddings
|
|
class SemanticRelated
|
|
MissingEmbeddingError = Class.new(StandardError)
|
|
|
|
def self.clear_cache_for(topic)
|
|
Discourse.cache.delete("semantic-suggested-topic-#{topic.id}")
|
|
Discourse.redis.del("build-semantic-suggested-topic-#{topic.id}")
|
|
end
|
|
|
|
def related_topic_ids_for(topic)
|
|
return [] if SiteSetting.ai_embeddings_semantic_related_topics < 1
|
|
|
|
strategy = DiscourseAi::Embeddings::Strategies::Truncation.new
|
|
vector_rep =
|
|
DiscourseAi::Embeddings::VectorRepresentations::Base.current_representation(strategy)
|
|
cache_for = results_ttl(topic)
|
|
|
|
Discourse
|
|
.cache
|
|
.fetch(semantic_suggested_key(topic.id), expires_in: cache_for) do
|
|
vector_rep
|
|
.symmetric_topics_similarity_search(topic)
|
|
.tap do |candidate_ids|
|
|
# Happens when the topic doesn't have any embeddings
|
|
# I'd rather not use Exceptions to control the flow, so this should be refactored soon
|
|
if candidate_ids.empty? || !candidate_ids.include?(topic.id)
|
|
raise MissingEmbeddingError, "No embeddings found for topic #{topic.id}"
|
|
end
|
|
end
|
|
end
|
|
rescue MissingEmbeddingError
|
|
# avoid a flood of jobs when visiting topic
|
|
if Discourse.redis.set(
|
|
build_semantic_suggested_key(topic.id),
|
|
"queued",
|
|
ex: 15.minutes.to_i,
|
|
nx: true,
|
|
)
|
|
Jobs.enqueue(:generate_embeddings, target_type: "Topic", target_id: topic.id)
|
|
end
|
|
[]
|
|
end
|
|
|
|
def results_ttl(topic)
|
|
case topic.created_at
|
|
when 6.hour.ago..Time.now
|
|
15.minutes
|
|
when 3.day.ago..6.hour.ago
|
|
1.hour
|
|
when 15.days.ago..3.day.ago
|
|
12.hours
|
|
else
|
|
1.week
|
|
end
|
|
end
|
|
|
|
def self.related_topics_for_crawler(controller)
|
|
return "" if !controller.instance_of? TopicsController
|
|
return "" if !SiteSetting.ai_embeddings_semantic_related_topics_enabled
|
|
return "" if SiteSetting.ai_embeddings_semantic_related_topics < 1
|
|
|
|
topic_view = controller.instance_variable_get(:@topic_view)
|
|
topic = topic_view&.topic
|
|
return "" if !topic
|
|
|
|
related_topics = SemanticTopicQuery.new(nil).list_semantic_related_topics(topic).topics
|
|
|
|
return "" if related_topics.empty?
|
|
|
|
ApplicationController.render(
|
|
template: "list/related_topics",
|
|
layout: false,
|
|
assigns: {
|
|
list: related_topics,
|
|
topic: topic,
|
|
},
|
|
)
|
|
end
|
|
|
|
private
|
|
|
|
def semantic_suggested_key(topic_id)
|
|
"semantic-suggested-topic-#{topic_id}"
|
|
end
|
|
|
|
def build_semantic_suggested_key(topic_id)
|
|
"build-semantic-suggested-topic-#{topic_id}"
|
|
end
|
|
end
|
|
end
|
|
end
|