discourse/plugins/chat/app/jobs/regular/chat_notify_mentioned.rb

# frozen_string_literal: true

module Jobs
  class ChatNotifyMentioned < ::Jobs::Base
    def execute(args = {})
      @chat_message =
        ChatMessage.includes(:user, :revisions, chat_channel: :chatable).find_by(
          id: args[:chat_message_id],
        )
      if @chat_message.nil? ||
           @chat_message.revisions.where("created_at > ?", args[:timestamp]).any?
        return
      end

      @creator = @chat_message.user
      @chat_channel = @chat_message.chat_channel
      @already_notified_user_ids = args[:already_notified_user_ids] || []
      user_ids_to_notify = args[:to_notify_ids_map] || {}
      user_ids_to_notify.each { |mention_type, ids| process_mentions(ids, mention_type.to_sym) }
    end

    private

    def get_memberships(user_ids)
      query =
        UserChatChannelMembership.includes(:user).where(
          user_id: (user_ids - @already_notified_user_ids),
          chat_channel_id: @chat_message.chat_channel_id,
        )
      query = query.where(following: true) if @chat_channel.public_channel?
      query
    end

    def build_data_for(membership, identifier_type:)
      data = {
        chat_message_id: @chat_message.id,
        chat_channel_id: @chat_channel.id,
        mentioned_by_username: @creator.username,
        is_direct_message_channel: @chat_channel.direct_message_channel?,
      }

      if !@is_direct_message_channel
        data[:chat_channel_title] = @chat_channel.title(membership.user)
        data[:chat_channel_slug] = @chat_channel.slug
      end

      return data if identifier_type == :direct_mentions

      case identifier_type
      when :here_mentions
        data[:identifier] = "here"
      when :global_mentions
        data[:identifier] = "all"
      else
        data[:identifier] = identifier_type if identifier_type
        data[:is_group_mention] = true
      end

      data
    end

    def build_payload_for(membership, identifier_type:)
      payload = {
        notification_type: Notification.types[:chat_mention],
        username: @creator.username,
        tag: Chat::ChatNotifier.push_notification_tag(:mention, @chat_channel.id),
        excerpt: @chat_message.push_notification_excerpt,
        post_url: "#{@chat_channel.relative_url}/#{@chat_message.id}",
      }

      translation_prefix =
        (
          if @chat_channel.direct_message_channel?
            "discourse_push_notifications.popup.direct_message_chat_mention"
          else
            "discourse_push_notifications.popup.chat_mention"
          end
        )

      translation_suffix = identifier_type == :direct_mentions ? "direct" : "other_type"
      identifier_text =
        case identifier_type
        when :here_mentions
          "@here"
        when :global_mentions
          "@all"
        when :direct_mentions
          ""
        else
          "@#{identifier_type}"
        end

      payload[:translated_title] = I18n.t(
        "#{translation_prefix}.#{translation_suffix}",
        username: @creator.username,
        identifier: identifier_text,
        channel: @chat_channel.title(membership.user),
      )

      payload
    end

    def create_notification!(membership, notification_data)
      is_read = Chat::ChatNotifier.user_has_seen_message?(membership, @chat_message.id)

      notification =
        Notification.create!(
          notification_type: Notification.types[:chat_mention],
          user_id: membership.user_id,
          high_priority: true,
          data: notification_data.to_json,
          read: is_read,
        )
      ChatMention.create!(
        notification: notification,
        user: membership.user,
        chat_message: @chat_message,
      )
    end

    def send_notifications(membership, notification_data, os_payload)
      create_notification!(membership, notification_data)

      if !membership.desktop_notifications_never? && !membership.muted?
        MessageBus.publish(
          "/chat/notification-alert/#{membership.user_id}",
          os_payload,
          user_ids: [membership.user_id],
        )
      end

      if !membership.mobile_notifications_never? && !membership.muted?
        PostAlerter.push_notification(membership.user, os_payload)
      end
    end

    def process_mentions(user_ids, mention_type)
      memberships = get_memberships(user_ids)

      memberships.each do |membership|
        notification_data = build_data_for(membership, identifier_type: mention_type)
        payload = build_payload_for(membership, identifier_type: mention_type)

        send_notifications(membership, notification_data, payload)
      end
    end
  end
end