module ActionView::LookupContext::ViewPaths

def any?(name, prefixes = [], partial = false)
  @view_paths.exists?(*args_for_any(name, prefixes, partial))
end

def args_for_any(name, prefixes, partial) # :nodoc:
  name, prefixes = normalize_name(name, prefixes)
  details, details_key = detail_args_for_any
  [name, prefixes, partial || false, details, details_key]
end

def args_for_lookup(name, prefixes, partial, keys, details_options) #:nodoc:
  name, prefixes = normalize_name(name, prefixes)
  details, details_key = detail_args_for(details_options)
  [name, prefixes, partial || false, details, details_key, keys]
end

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

def detail_args_for_any # :nodoc:
  @detail_args_for_any ||= begin
    details = {}
    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.get(details)]
    else
      [details, nil]
    end
  end
end

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

def find(name, prefixes = [], partial = false, keys = [], options = {})
  @view_paths.find(*args_for_lookup(name, prefixes, partial, keys, options))
end

def find_all(name, prefixes = [], partial = false, keys = [], options = {})
  @view_paths.find_all(*args_for_lookup(name, prefixes, partial, keys, options))
end

def find_file(name, prefixes = [], partial = false, keys = [], options = {})
  @view_paths.find_file(*args_for_lookup(name, prefixes, partial, keys, options))
end

def normalize_name(name, prefixes) #:nodoc:
  prefixes = prefixes.presence
  parts    = name.to_s.split('/'.freeze)
  parts.shift if parts.first.empty?
  name     = parts.pop
  return name, prefixes || [""] if parts.empty?
  parts    = parts.join('/'.freeze)
  prefixes = prefixes ? prefixes.map { |p| "#{p}/#{parts}" } : [parts]
  return name, prefixes
end

def view_paths=(paths)
  @view_paths = ActionView::PathSet.new(Array(paths))
end

def with_fallbacks
  added_resolvers = 0
  self.class.fallbacks.each do |resolver|
    next if view_paths.include?(resolver)
    view_paths.push(resolver)
    added_resolvers += 1
  end
  yield
ensure
  added_resolvers.times { view_paths.pop }
end