module ResourceHelper
	# Renders a label for the current controller resource and action. Useful for labeling index, show, new, and edit views.
	# Format: <action> <suffix || resource name>, Example: "New Post"
	# *suffix* - Optional. The suffix to be applied to the action name. Defaults to the controller name (i.e. resource). 
	def render_action_label suffix = nil
		[params[:action].capitalize, (suffix || controller_name.singularize.capitalize)] * ' '
	end
	
	# Answers whether the given action is equal to the current action.
	def is_action? action
		params[:action] == action.to_s
	end
	
	# Answers if the current action is an index action.
	def index_action?
		is_action? :index
	end
	
	# Answers if the current action is show action.
	def show_action?
		is_action? :show
	end
	
	# Answers if the current action is a new action.
	def new_action?
		is_action? :new
	end
	
	# Answers if the current action is a create action.
	def create_action?
		is_action? :create
	end
	
	# Answers if the current action is an edit action.
	def edit_action?
		is_action? :edit
	end
	
	# Answers if the current action is an update action.
	def update_action?
		is_action? :update
	end
	
	# Answers if the current action is a destroy action.
	def destroy_action?
		is_action? :destroy
	end
	
	# Toggles hiding a group of records if the given collection is empty. Use as a class attribute.
	# * *collection* - The collection of records.
	def toggle_group_class collection
		"hidden" if collection.empty?
	end
	
	# Builds a DOM ID for a given record. Works the same as the Rails dom_id helper except that it returns a record ID with
	# a "_0" suffix for new records instead of a "new_" prefix. This makes record IDs consistent and attaching JavaScript
	# events easier.
	def build_dom_id record
		name = record.class.name.underscore
		id = record.new_record? ? 0 : record.id
		[name, id].compact * '_'
	end
	
  # Renders a descriptive label based on the current controller action. Useful for new/edit actions.
  # * *suffix* - The action label.
  def render_render_action_label suffix
    [params[:action].capitalize, suffix].compact * ' '
  end

	# Renders a label or an icon.
	# * *label* - Optional (if use_icon=true). The link label. Defaults to "Unknown".
	# * *use_icon* - Optional. Boolean for using a text or icon link. Defaults to false.
	# * *icon_path* - Optional. The icon path. Defaults to "#{THEME_ROOT}/images/icons/unknown.png".
	# * *icon_alt* - Optional. The icon text. Defaults to "Unknown Icon".
	# * *icon_size* - Optional. The icon dimensions. Example: "{width}x{height}". Defaults to nil.
	def render_label_or_icon options = {}
		options.delete_if {|key, value| value.blank?}
    options.reverse_merge! :label => "Uknown", :icon_path => "#{THEME_ROOT}/images/icons/unknown.png", :icon_alt => "Unknown Icon"
		options[:use_icon] ? image_tag(options[:icon_path], :alt => options[:icon_alt], :size => options[:icon_size]) : options[:label]
	end
	
  # Renders an UJS show link.
	# * *label* - Optional. The link label. Defaults to "Show".
  # * *id* - Optional. The link ID. Defaults to nil.
	# * *class* - Optional. The link class. Defaults to "show".
	# * *url* - Required. The link URL (example: /posts/1). Defaults to "#show".
	# * *use_icon* - Optional. Boolean for using a text or icon link. Defaults to false.
	# * *icon_path* - Optional. The icon path. Defaults to "#{THEME_ROOT}/images/icons/rest/show.png".
	# * *icon_alt* - Optional. The icon text. Defaults to "Show Icon".
	# * *icon_size* - Optional. The icon dimensions. Example: "{width}x{height}". Defaults to nil.
	def render_show_link options = {}
		options.delete_if {|key, value| value.blank?}
    options.reverse_merge! :label => "Show", :icon_path => "#{THEME_ROOT}/images/icons/rest/show.png", :icon_alt => "Show Icon", :class => "show", :url => "#show"
    link_to render_label_or_icon(options), options[:url], :id => options[:id], :class => options[:class]
	end	

  # Renders an UJS new link.
	# * *label* - Optional. The link label. Defaults to "New".
  # * *id* - Optional. The link ID. Defaults to nil.
	# * *class* - Optional. The link class. Defaults to "new".
	# * *type* - Optional. Determines the type of object be created. Specifiy "input" as the type for form additions. Defaults to nil.
	# * *ogid* = Optional (if type=nil). The outer group ID. Defaults to nil. 
	# * *igid* = Optional (if type=nil). The inner group ID. Defaults to nil.
	# * *position* = Optional (if type=nil). A number position of the ID to be modified. Useful when dealing with complex nested forms. Defaults to 0.
	# * *url* - Optional (if type="input"). The link URL (example: /posts/new). Defaults to "#new".
	# * *use_icon* - Optional. Boolean for using a text or icon link. Defaults to false.
	# * *icon_path* - Optional. The icon path. Defaults to "#{THEME_ROOT}/images/icons/rest/new.png".
	# * *icon_alt* - Optional. The icon text. Defaults to "New Icon".
	# * *icon_size* - Optional. The icon dimensions. Example: "{width}x{height}". Defaults to nil.
	def render_new_link options = {}
		options.delete_if {|key, value| value.blank?}
    options.reverse_merge! :label => "New", :icon_path => "#{THEME_ROOT}/images/icons/rest/new.png", :icon_alt => "New Icon", :class => "new", :url => "#new", "data-position" => 0
		link_to render_label_or_icon(options), options[:url], :id => options[:id], :class => options[:class], "data-type" => options[:type], "data-ogid" => options[:ogid], "data-igid" => options[:igid], "data-position" => options[:position]
	end

  # Renders an UJS edit link.
	# * *label* - Optional. The link label. Defaults to "Edit".
  # * *id* - Optional. The link ID. Defaults to nil.
	# * *class* - Optional. The link class. Defaults to "edit".
	# * *url* - Required. The link URL (example: /posts/1/edit). Defaults to "#edit".
	# * *use_icon* - Optional. Boolean for using a text or icon link. Defaults to false.
	# * *icon_path* - Optional. The icon path. Defaults to "#{THEME_ROOT}/images/icons/rest/edit.png".
	# * *icon_alt* - Optional. The icon text. Defaults to "Edit Icon".
	# * *icon_size* - Optional. The icon dimensions. Example: "{width}x{height}". Defaults to nil.
	def render_edit_link options = {}
		options.delete_if {|key, value| value.blank?}
    options.reverse_merge! :label => "Edit", :icon_path => "#{THEME_ROOT}/images/icons/rest/edit.png", :icon_alt => "Edit Icon", :class => "edit", :url => "#edit"
    link_to render_label_or_icon(options), options[:url], :id => options[:id], :class => options[:class]
	end
  
  # Renders an UJS destroy link.
	# * *label* - Optional. The link label. Defaults to "Delete".
  # * *id* - Optional. The link ID. Defaults to nil.
	# * *class* - Optional. The link class. Defaults to "destroy".
	# * *type* - Optional. Determines the type of object be deleted. Specifiy "input" as the type for form deletions. Defaults to nil.
	# * *url* - Required. The link URL (example: /posts/1). Defaults to "#destroy".
	# * *use_icon* - Optional. Boolean for using a text or icon link. Defaults to false.
	# * *icon_path* - Optional. The icon path. Defaults to "#{THEME_ROOT}/images/icons/rest/destroy.png".
	# * *icon_alt* - Optional. The icon text. Defaults to "Delete Icon".
	# * *icon_size* - Optional. The icon dimensions. Example: "{width}x{height}". Defaults to nil.
  def render_destroy_link options = {}
		options.delete_if {|key, value| value.blank?}
    options.reverse_merge! :label => "Delete", :icon_path => "#{THEME_ROOT}/images/icons/rest/destroy.png", :icon_alt => "Delete Icon", :class => "destroy", :url => "#destroy"
    link_to render_label_or_icon(options), options[:url], :id => options[:id], :class => options[:class], "data-type" => options[:type]
  end
end