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path: root/app/controllers/follower_accounts_controller.rb
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# frozen_string_literal: true

class FollowerAccountsController < ApplicationController
  include AccountControllerConcern

  def index
    respond_to do |format|
      format.html do
        follows
        @relationships = AccountRelationshipsPresenter.new(follows.map(&:account_id), current_user.account_id) if user_signed_in?
      end

      format.json do
        render json: collection_presenter,
               serializer: ActivityPub::CollectionSerializer,
               adapter: ActivityPub::Adapter,
               content_type: 'application/activity+json'
      end
    end
  end

  private

  def follows
    @follows ||= Follow.where(target_account: @account).recent.page(params[:page]).per(FOLLOW_PER_PAGE).preload(:account)
  end

  def page_url(page)
    account_followers_url(@account, page: page) unless page.nil?
  end

  def collection_presenter
    if params[:page].present?
      ActivityPub::CollectionPresenter.new(
        id: account_followers_url(@account, page: params.fetch(:page, 1)),
        type: :ordered,
        size: @account.followers_count,
        items: follows.map { |f| ActivityPub::TagManager.instance.uri_for(f.account) },
        part_of: account_followers_url(@account),
        next: page_url(follows.next_page),
        prev: page_url(follows.prev_page)
      )
    else
      ActivityPub::CollectionPresenter.new(
        id: account_followers_url(@account),
        type: :ordered,
        size: @account.followers_count,
        first: page_url(1)
      )
    end
  end
end