class Projects::NetworkController < Projects::ApplicationController
  include ExtractsPath
  include ApplicationHelper

  before_action :whitelist_query_limiting
  before_action :require_non_empty_project
  before_action :assign_ref_vars
  before_action :authorize_download_code!
  before_action :assign_commit

  def show
    # n+1: https://gitlab.com/gitlab-org/gitlab-ce/issues/37602
    Gitlab::GitalyClient.allow_n_plus_1_calls do
      @url = project_network_path(@project, @ref, @options.merge(format: :json))
      @commit_url = project_commit_path(@project, 'ae45ca32').gsub("ae45ca32", "%s")

      respond_to do |format|
        format.html do
          if @options[:extended_sha1] && !@commit
            flash.now[:alert] = "Git revision '#{@options[:extended_sha1]}' does not exist."
          end
        end

        format.json do
          @graph = Network::Graph.new(project, @ref, @commit, @options[:filter_ref])
        end
      end

      render
    end
  end

  def assign_commit
    return if params[:extended_sha1].blank?

    @options[:extended_sha1] = params[:extended_sha1]
    @commit = @repo.commit(@options[:extended_sha1])
  end

  def whitelist_query_limiting
    Gitlab::QueryLimiting.whitelist('https://gitlab.com/gitlab-org/gitlab-ce/issues/42333')
  end
end
