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class PackagesController < ApplicationController
  include PackageUpdateFeeds
  before_action :set_nav

  def index
    redirect_to categories_path
  end

  def search
    @offset = params[:o].to_i || 0
    @packages = PackageRepository.default_search(params[:q], @offset)
    @query = params[:q]

    render_packages_feed :packageinfo, t(:feed_search_results, query: params[:q])

    redirect_to package_path(@packages.first).gsub('%2F', '/') if @packages.size == 1
  end

  def suggest
    @packages = PackageRepository.suggest(params[:q])
  end

  def resolve
    @packages = PackageRepository.resolve(params[:atom])
  end

  def show
    @package = PackageRepository.find_by(:atom, params[:id])
    fail ActionController::RoutingError, 'No such package' unless @package

    fresh_when etag: @package.updated_at, last_modified: @package.updated_at, public: true

    # Enable this in 2024 (when we have full-color emojis on a Linux desktop)
    # @title = ' &#x1F4E6; %s' % @package.atom
    @title = @package.atom
    @description = 'Gentoo package %s: %s' % [@package.atom, @package.description]
  end

  def changelog
    @package = PackageRepository.find_by(:atom, params[:id])
    fail ActionController::RoutingError, 'No such package' unless @package

    if stale?(etag: @package.updated_at, last_modified: @package.updated_at, public: true)
      @changelog = Rails.cache.fetch("changelog/#{@package.atom}") do
        CommitRepository.find_sorted_by('packages', @package.category + '/' + @package.name, 'date', 'desc', 5)
      end

      respond_to do |wants|
        wants.html { render layout: false }
        wants.json {}
      end
    end
  end

  def added
    @changes = new_packages
    render_changes_feed :added, t(:feed_added)
  end

  def updated
    @changes = version_bumps
    render_changes_feed :updated, t(:feed_updated)
  end

  def stable
    @changes = stabled_packages
    render_changes_feed :stable, t(:feed_stable)
  end

  def keyworded
    @changes = keyworded_packages
    render_changes_feed :keyworded, t(:feed_keyworded)
  end

  private

  def render_changes_feed(type, title)
    respond_to do |wants|
      wants.html {}
      wants.atom do
        @feed_type = type
        @feed_title = title
        render template: 'feeds/changes'
      end
    end
  end

  def render_packages_feed(type, title)
    respond_to do |wants|
      wants.html {}
      wants.atom do
        @feed_type = type
        @feed_title = title
        render template: 'feeds/packages'
      end
    end
  end

  def set_nav
    @nav = :packages
  end
end