module ActionView::LookupContext::ViewPaths

def any?(name, prefixes = [], partial = false)
  name, prefixes = normalize_name(name, prefixes)
  details, details_key = detail_args_for_any
  @view_paths.exists?(name, prefixes, partial, details, details_key, [])
end

def append_view_paths(paths)
  @view_paths = build_view_paths(@view_paths.to_a + paths)
end

def build_view_paths(paths)
  if ActionView::PathSet === paths
    paths
  else
    ActionView::PathSet.new(Array(paths))
  end
end

def detail_args_for(options) # :doc:
  return @details, details_key if options.empty? # most common path.
  user_details = @details.merge(options)
  if @cache
    details_key = DetailsKey.details_cache_key(user_details)
  else
    details_key = nil
  end
  [user_details, details_key]
end

def detail_args_for_any
  @detail_args_for_any ||= begin
    details = {}
    LookupContext.registered_details.each do |k|
      if k == :variants
        details[k] = :any
      else
        details[k] = Accessors::DEFAULT_PROCS[k].call
      end
    end
    if @cache
      [details, DetailsKey.details_cache_key(details)]
    else
      [details, nil]
    end
  end
end

def exists?(name, prefixes = [], partial = false, keys = [], **options)
  name, prefixes = normalize_name(name, prefixes)
  details, details_key = detail_args_for(options)
  @view_paths.exists?(name, prefixes, partial, details, details_key, keys)
end

def find(name, prefixes = [], partial = false, keys = [], options = {})
  name, prefixes = normalize_name(name, prefixes)
  details, details_key = detail_args_for(options)
  @view_paths.find(name, prefixes, partial, details, details_key, keys)
end

def find_all(name, prefixes = [], partial = false, keys = [], options = {})
  name, prefixes = normalize_name(name, prefixes)
  details, details_key = detail_args_for(options)
  @view_paths.find_all(name, prefixes, partial, details, details_key, keys)
end

def normalize_name(name, prefixes)
  name = name.to_s
  idx = name.rindex("/")
  return name, prefixes.presence || [""] unless idx
  path_prefix = name[0, idx]
  path_prefix = path_prefix.from(1) if path_prefix.start_with?("/")
  name = name.from(idx + 1)
  if !prefixes || prefixes.empty?
    prefixes = [path_prefix]
  else
    prefixes = prefixes.map { |p| "#{p}/#{path_prefix}" }
  end
  return name, prefixes
end

def prepend_view_paths(paths)
  @view_paths = build_view_paths(paths + @view_paths.to_a)
end