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module SimpleNavigation
# This class acts as an adapter to items that are not defined using the DSL in the config/navigation.rb, but directly provided inside the application.
# When defining the items that way, every item you provide needs to define the following methods:
#
# * <tt>key</tt>
# * <tt>name</tt>
# * <tt>url</tt>
#
# and optionally
#
# * <tt>options</tt>
# * <tt>items</tt> - if one of your items has a subnavigation it must respond to <tt>items</tt> providing the subnavigation.
#
# See SimpleNavigation::ItemContainer#item for the purpose of these methods.
class ItemAdapter
delegate :key, :name, :url, :to => :item
attr_reader :item
def initialize(item)
@item = item
end
# Returns the options for this item. If the wrapped item does not implement an options method, an empty hash is returned.
def options
@item.respond_to?(:options) ? @item.options : {}
end
# Returns the items (subnavigation) for this item if it responds to :items and the items-collection is not empty. Returns nil otherwise.
def items
(@item.respond_to?(:items) && !(@item.items.nil? || @item.items.empty?)) ? @item.items : nil
end
# Converts this Item into a SimpleNavigation::Item
def to_simple_navigation_item(item_container)
SimpleNavigation::Item.new(item_container, key, name, url, options, items)
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems