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Contents
module ActiveAdmin
DEFAULT_MENU = :default
# A MenuCollection stores multiple menus for any given namespace. Namespaces delegate
# the addition of menu items to this class.
class MenuCollection
NoMenuError = Class.new(KeyError)
def initialize
@menus = {}
@build_callbacks = []
@built = false
end
# Add a new menu item to a menu in the collection
def add(menu_name, menu_item_options = {})
menu = find_or_create(menu_name)
menu.add menu_item_options
end
def clear!
@menus = {}
@built = false
end
def exists?(menu_name)
@menus.keys.include? menu_name
end
def fetch(menu_name)
build_menus!
@menus[menu_name] or
raise NoMenuError, "No menu by the name of #{menu_name.inspect} in availble menus: #{@menus.keys.join(", ")}"
end
# Add callbacks that will be run when the menu is going to be built. This
# helps use with reloading and allows configurations to add items to menus.
#
# @param [Proc] block A block which will be ran when the menu is built. The
# will have the menu collection yielded.
def on_build(&block)
@build_callbacks << block
end
# Add callbacks that will be run before the menu is built
def before_build(&block)
@build_callbacks.unshift(block)
end
def menu(menu_name)
menu = find_or_create(menu_name)
yield(menu) if block_given?
menu
end
private
def built?
@built
end
def build_menus!
return if built?
build_default_menu
run_on_build_callbacks
@built = true
end
def run_on_build_callbacks
@build_callbacks.each do |callback|
callback.call(self)
end
end
def build_default_menu
find_or_create DEFAULT_MENU
end
def find_or_create(menu_name)
menu_name ||= DEFAULT_MENU
@menus[menu_name] ||= ActiveAdmin::Menu.new
end
end
end
Version data entries
63 entries across 63 versions & 6 rubygems