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module NavigationHelper
#
# Create a navigation link.
#
# Signature is the same as link_to, except...
# * it accepts an :active flag in the html_options
# * it accepts an :icon string in the html_options
# * the label (first arg) will be translated
#
def link_to_navigation(*args)
html_options = args.extract_options! || {}
active_class = extract_active_class!(html_options)
icon = extract_icon!(html_options)
args[0] = icon + translate(args[0], cascade: true)
args << html_options if html_options.present?
content_tag :li, :class => active_class do
link_to(*args)
end
end
#
# returns true if params[:action] matches one of the args.
#
def action?(*actions)
actions.detect do |action|
if action.is_a? String
action == action_string
elsif action.is_a? Symbol
if action == :none
action_string == nil
else
action == action_symbol
end
end
end
end
#
# returns true if params[:controller] matches one of the args.
#
# for example:
# controller?(:me, :home)
# controller?('groups/') <-- matches any controller in namespace 'groups'
#
def controller?(*controllers)
controllers.each do |cntr|
if cntr.is_a? String
if cntr.ends_with?('/')
return true if controller_string.starts_with?(cntr.chop)
end
return true if cntr == controller_string
elsif cntr.is_a? Symbol
return true if cntr == controller_symbol
end
end
return false
end
private
def extract_active_class!(options)
active_class = options.delete(:active) ? 'active' : nil
options[:class] = [options[:class], active_class].compact.join(' ')
active_class
end
def extract_icon!(options)
name = options.delete(:icon)
if name.present?
icon name
else
""
end
end
def controller_string
@controller_string ||= params[:controller].to_s.gsub(/^\//, '')
end
def controller_symbol
@controller_symbol ||= params[:controller].gsub(/^\//,'').gsub('/','_').to_sym
end
def action_string
params[:action]
end
def action_symbol
@action_symbol ||= if params[:action].present?
params[:action].to_sym
else
nil
end
end
end
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