discourse-custom-wizard-unlocked/lib/custom_wizard/realtime_validation.rb

# frozen_string_literal: true

class CustomWizard::RealtimeValidation
  cattr_accessor :types
  @@types ||= {
    similar_topics: { types: [:text], component: "similar-topics-validator", backend: true, required_params: [] }
  }

  class SimilarTopic
    def initialize(topic)
      @topic = topic
    end

    attr_reader :topic

    def blurb
      Search::GroupedSearchResults.blurb_for(cooked: @topic.try(:blurb))
    end
  end

  def self.similar_topics(params, current_user)
    title = params[:title]
    raw = params[:raw]
    categories = params[:categories]
    date_after = params[:date_after]

    if title.length < SiteSetting.min_title_similar_length || !Topic.count_exceeds_minimum?
      return []
    end

    topics = Topic.similar_to(title, raw, current_user).to_a
    topics.select! { |t| categories.include?(t.category.id.to_s) } if categories.present?
    topics.select! { |t| t.created_at > DateTime.parse(date_after) } if date_after.present?
    topics.map! { |t| SimilarTopic.new(t) }
    { items: topics, serializer: SimilarTopicSerializer, opts: { root: :similar_topics } }
  end
end