module Plate
  # Allow for partials within views
  module PartialsHelper
    def render(options = {}, locals = {})
      path = options

      # If a hash is passed as the first option, use it for locals
      if Hash === options
        path = options.delete(:partial)
        locals = options.clone
      end

      locals.symbolize_keys!

      render_partial(path.to_s, locals)
    end

    protected
      # Create a new partial with the given options, and return its content
      def render_partial(path, locals)
        partial_name = Partial.name(self.site, path, self.file)
        partial = Partial.find(self.site, partial_name)

        if partial
          self.page.partials << partial unless self.page.partials.include?(partial)
          partial.pages << self.page unless partial.pages.include?(self.page)
          partial.render(locals)
        else
          nil
        end
      end
  end
end