require_dependency 'similar_topic_serializer' require_dependency 'search/grouped_search_results' class SimilarTopicsController < ApplicationController class SimilarTopic def initialize(topic) @topic = topic end attr_reader :topic def blurb Search::GroupedSearchResults.blurb_for(@topic.try(:blurb)) end end def index params.require(:title) params.require(:raw) title, raw = params[:title], params[:raw] invalid_length = [:title, :raw].any? { |key| check_invalid_length(key, params[key]) } # Only suggest similar topics if the site has a minimum amount of topics present # and params are long enough. return render json: [] if invalid_length || !Topic.count_exceeds_minimum? topics = Topic.similar_to(title, raw, current_user).to_a topics.map! { |t| SimilarTopic.new(t) } render_serialized(topics, SimilarTopicSerializer, root: :similar_topics, rest_serializer: true) end protected def check_invalid_length(key, attr) str = (key == :raw) ? "body" : key.to_s attr.length < SiteSetting.send("min_#{str}_similar_length") end end