Publicaciones de RSVP del Calendario

Hola, tenía un problema con los usuarios cuando participan o no en un evento: aparecían dos avatares en el evento en lugar de uno, y al refrescar se solucionaba, pero causaba confusión entre los usuarios. He modificado el código de mi parte; no sé si te interese.

# frozen_string_literal: true
# name: discourse-calendar-rsvp-posts
# about: Crear respuestas breves en temas para eventos de RSVP
# version: 0.4
# authors: Mario Santana

after_initialize do
  module ::CalendarRsvpPosts
    PLUGIN_NAME = "discourse-calendar-rsvp-posts"
    
    def self.history_marker
      I18n.t('calendar_rsvp_posts.markers.history')
    end
    
    def self.notification_marker
      I18n.t('calendar_rsvp_posts.markers.notification')
    end

    # Ayudante para decidir si debemos ignorar este evento
    def self.should_post_for_event?(event)
      return false if event.nil?
      return true if SiteSetting.calendar_rsvp_posts_allow_past_events
      return false if event.starts_at.nil?
      event.starts_at >= Time.current
    end

    # Buscar cualquier publicación de RSVP para un evento (historial o notificación simple)
    def self.find_rsvp_posts(event)
      return [] if event.nil? || event.post.nil? || event.post.topic.nil?
      
      event.post.topic.posts
        .where(user_id: Discourse.system_user.id)
        .where("raw LIKE ? OR raw LIKE ?", 
               "%#{history_marker}%",
               "%#{notification_marker}%")
        .order(created_at: :asc)
    end

    # Buscar específicamente la publicación del historial
    def self.find_history_post(event)
      return nil if event.nil? || event.post.nil? || event.post.topic.nil?
      
      event.post.topic.posts
        .where(user_id: Discourse.system_user.id)
        .where("raw LIKE ?", "%#{history_marker}%")
        .order(created_at: :asc)
        .first
    end

    # Buscar y eliminar todas las publicaciones de notificación (pero no la del historial)
    def self.delete_notification_posts(event)
      return if event.nil? || event.post.nil? || event.post.topic.nil?
      
      notification_posts = event.post.topic.posts
        .where(user_id: Discourse.system_user.id)
        .where("raw LIKE ?", "%#{notification_marker}%")
      
      notification_posts.each do |post|
        begin
          PostDestroyer.new(Discourse.system_user, post, context: "limpieza de calendar-rsvp-posts").destroy
        rescue StandardError => e
          Rails.logger.warn("calendar-rsvp-posts: no se pudo eliminar la publicación de notificación #{post.id}: #{e}")
        end
      end
    end

    # Construir una línea de entrada del historial con marca de tiempo
    def self.build_history_entry(username, action_label, extra_text = nil)
      timestamp = Time.current.strftime("%Y-%m-%d %H:%M UTC")
      entry = "- **#{timestamp}** - #{username} #{action_label}"
      entry += " (#{extra_text})" if extra_text.present?
      entry
    end

    # Construir o actualizar el contenido de la publicación del historial
    def self.build_history_raw(event, new_entry)
      event_title = (event.name.presence || event.post.topic.title).to_s
      parts = []
      parts << history_marker
      parts << "### #{I18n.t('calendar_rsvp_posts.history.header', event_title: event_title)}"
      parts << ""
      parts << new_entry
      parts.join("\n")
    end

    # Añadir nueva entrada al historial existente
    def self.append_to_history(existing_raw, new_entry)
      lines = existing_raw.split("\n")
      header_end_idx = lines.index { |line| line.start_with?("### Historial de RSVP") }
      
      if header_end_idx
        insert_idx = header_end_idx + 2
        lines.insert(insert_idx, new_entry)
      else
        lines << new_entry
      end
      
      lines.join("\n")
    end

    # Convertir una publicación de notificación simple al formato de historial
    def self.convert_to_history(simple_post, event)
      raw = simple_post.raw
      
      going_label = I18n.t('calendar_rsvp_posts.actions.going').gsub('(', '\\(').gsub(')', '\\)')
      interested_label = I18n.t('calendar_rsvp_posts.actions.interested').gsub('(', '\\(').gsub(')', '\\)')
      not_going_label = I18n.t('calendar_rsvp_posts.actions.not_going').gsub('(', '\\(').gsub(')', '\\)')
      removed_label = I18n.t('calendar_rsvp_posts.actions.removed').gsub('(', '\\(').gsub(')', '\\)')
      
      pattern = /\*\*([^\*]+)\s+(#{Regexp.escape(going_label)}|#{Regexp.escape(interested_label)}|#{Regexp.escape(not_going_label)}|#{Regexp.escape(removed_label)})\*\*/
      match = raw.match(pattern)
      
      if match
        username = match[1]
        action = match[2]
        
        extra_match = raw.match(/\.\s+([^.]+)\.$/)
        extra_text = extra_match ? extra_match[1] : nil
        
        timestamp = simple_post.created_at.strftime("%Y-%m-%d %H:%M UTC")
        first_entry = "- **#{timestamp}** - #{username} #{action}"
        first_entry += " (#{extra_text})" if extra_text.present?
        
        event_title = (event.name.presence || event.post.topic.title).to_s
        parts = []
        parts << history_marker
        parts << "### #{I18n.t('calendar_rsvp_posts.history.header', event_title: event_title)}"
        parts << ""
        parts << first_entry
        parts.join("\n")
      else
        event_title = (event.name.presence || event.post.topic.title).to_s
        history_marker + "\n### #{I18n.t('calendar_rsvp_posts.history.header', event_title: event_title)}\n\n" + raw
      end
    end

    # Construir una publicación de notificación
    def self.build_notification_raw(username, action_label, event, extra_text = nil)
      event_title = (event.name.presence || event.post.topic.title).to_s
      extra_text_formatted = extra_text.present? ? "#{extra_text} " : ""
      
      notification_raw = notification_marker + "\n"
      notification_raw += I18n.t('calendar_rsvp_posts.notification.template', 
                                event_title: event_title,
                                extra: extra_text_formatted,
                                username: username,
                                action: action_label)
      notification_raw
    end

    # Método central de lógica para manejar la creación/actualización de publicaciones
    def self.publish_rsvp_update(event, username, action_label, extra_text = nil)
      if SiteSetting.calendar_rsvp_posts_enable_history
        history_post = find_history_post(event)
        all_rsvp_posts = find_rsvp_posts(event)
        new_entry = build_history_entry(username, action_label, extra_text)

        if all_rsvp_posts.empty?
          notification_raw = build_notification_raw(username, action_label, event, extra_text)
          PostCreator.create!(
            Discourse.system_user,
            topic_id: event.post.topic_id,
            raw: notification_raw,
            skip_validations: true
          )
        elsif history_post.nil?
          first_post = all_rsvp_posts.first
          history_raw = convert_to_history(first_post, event)
          history_raw = append_to_history(history_raw, new_entry)
          
          PostRevisor.new(first_post, event.post.topic).revise!(
            Discourse.system_user,
            raw: history_raw,
            skip_validations: true,
            skip_revision: false
          )

          notification_raw = build_notification_raw(username, action_label, event, extra_text)
          PostCreator.create!(
            Discourse.system_user,
            topic_id: event.post.topic_id,
            raw: notification_raw,
            skip_validations: true
          )
        else
          updated_raw = append_to_history(history_post.raw, new_entry)
          PostRevisor.new(history_post, event.post.topic).revise!(
            Discourse.system_user,
            raw: updated_raw,
            skip_validations: true,
            skip_revision: false
          )

          delete_notification_posts(event)

          notification_raw = build_notification_raw(username, action_label, event, extra_text)
          PostCreator.create!(
            Discourse.system_user,
            topic_id: event.post.topic_id,
            raw: notification_raw,
            skip_validations: true
          )
        end
      else
        all_rsvp_posts = find_rsvp_posts(event)
        
        all_rsvp_posts.each do |post|
          begin
            PostDestroyer.new(Discourse.system_user, post, context: "limpieza de calendar-rsvp-posts").destroy
          rescue StandardError => e
            Rails.logger.warn("calendar-rsvp-posts: no se pudo eliminar la publicación #{post.id}: #{e}")
          end
        end

        notification_raw = build_notification_raw(username, action_label, event, extra_text)
        PostCreator.create!(
          Discourse.system_user,
          topic_id: event.post.topic_id,
          raw: notification_raw,
          skip_validations: true
        )
      end
    end
  end

  # ==========================================
  # Definición del trabajo en segundo plano
  # ==========================================
  module ::Jobs
    class ProcessCalendarRsvpPost < ::Jobs::Base
      def execute(args)
        event_id = args[:event_id]
        username = args[:username]
        action_label = args[:action_label]
        extra_text = args[:extra_text]

        event = DiscoursePostEvent::Event.find_by(id: event_id)
        return unless event

        ::CalendarRsvpPosts.publish_rsvp_update(event, username, action_label, extra_text)
      end
    end
  end

  # ==========================================
  # Manejadores de eventos
  # ==========================================

  # Manejador para creación/actualización de asistencia
  proc_handler = proc do |invitee|
    begin
      event = invitee&.event
      next if event.nil?
      next unless CalendarRsvpPosts.should_post_for_event?(event)

      going_val = DiscoursePostEvent::Invitee.statuses[:going]
      interested_val = DiscoursePostEvent::Invitee.statuses[:interested]
      not_going_val = DiscoursePostEvent::Invitee.statuses[:not_going]

      new_status = invitee.status
      prev_status =
        if invitee.respond_to?(:previous_changes) && invitee.previous_changes["status"]
          invitee.previous_changes["status"][0]
        else
          nil
        end

      next if prev_status && prev_status == new_status

      username = invitee.user&.username || "alguien"
      action_label = nil

      if new_status == going_val && SiteSetting.calendar_rsvp_posts_on_new_going
        action_label = I18n.t('calendar_rsvp_posts.actions.going')
      elsif new_status == interested_val && SiteSetting.calendar_rsvp_posts_on_new_interested
        action_label = I18n.t('calendar_rsvp_posts.actions.interested')
      elsif new_status == not_going_val && SiteSetting.calendar_rsvp_posts_on_new_not_going
        action_label = I18n.t('calendar_rsvp_posts.actions.not_going')
      end

      next if action_label.nil?

      extra_text = nil
      if event.max_attendees.present?
        current_going = event.going_count
        prev_going =
          if prev_status == going_val && new_status != going_val
            current_going + 1
          elsif prev_status != going_val && new_status == going_val
            current_going - 1
          else
            current_going
          end

        was_full = prev_going >= event.max_attendees
        is_full = current_going >= event.max_attendees

        if was_full && !is_full
          extra_text = I18n.t('calendar_rsvp_posts.capacity.spots_available')
        elsif !was_full && is_full
          extra_text = I18n.t('calendar_rsvp_posts.capacity.now_full')
        end
      end

      # Encolar el trabajo en lugar de bloquear la solicitud
      Jobs.enqueue(:process_calendar_rsvp_post, 
        event_id: event.id, 
        username: username, 
        action_label: action_label, 
        extra_text: extra_text
      )

    rescue StandardError => e
      Rails.logger.warn("calendar-rsvp-posts: error del manejador: #{e}")
      Rails.logger.warn(e.backtrace.join("\n"))
    end
  end

  on(:discourse_calendar_post_event_invitee_status_changed, &proc_handler)

  # Manejador para eliminaciones explícitas de invitados (RSVP eliminado)
  if defined?(DiscoursePostEvent::Invitee)
    DiscoursePostEvent::Invitee.class_eval do
      after_destroy do
        event = self.event
        
        should_process = event.present? &&
                         SiteSetting.calendar_rsvp_posts_on_removed_rsvp &&
                         (SiteSetting.calendar_rsvp_posts_allow_past_events || event.starts_at.nil? || event.starts_at >= Time.current)
        
        if should_process
          begin
            username = self.user&.username || "alguien"
            action_label = I18n.t('calendar_rsvp_posts.actions.removed')

            # Encolar el trabajo en lugar de bloquear la solicitud
            Jobs.enqueue(:process_calendar_rsvp_post, 
              event_id: event.id, 
              username: username, 
              action_label: action_label,
              extra_text: nil
            )
            
          rescue StandardError => e
            Rails.logger.warn("calendar-rsvp-posts: error del manejador after_destroy: #{e}")
            Rails.logger.warn(e.backtrace.join("\n"))
          end
        end
      end
    end
  end
end