namespace :cache_digests do
  desc "Lookup nested dependencies for TEMPLATE (like messages/show or comments/_comment.html)"
  task nested_dependencies: :environment do
    abort "You must provide TEMPLATE for the task to run" unless ENV["TEMPLATE"].present?
    puts JSON.pretty_generate ActionView::Digestor.tree(CacheDigests.template_name, CacheDigests.finder).children.map(&:to_dep_map)
  end

  desc "Lookup first-level dependencies for TEMPLATE (like messages/show or comments/_comment.html)"
  task dependencies: :environment do
    abort "You must provide TEMPLATE for the task to run" unless ENV["TEMPLATE"].present?
    puts JSON.pretty_generate ActionView::Digestor.tree(CacheDigests.template_name, CacheDigests.finder).children.map(&:name)
  end

  class CacheDigests
    def self.template_name
      ENV["TEMPLATE"].split(".", 2).first
    end

    def self.finder
      ApplicationController.new.lookup_context
    end
  end
end