class PresentationController < ApplicationController
  Presentations='public/presentations'
def first_time
	if (pa=params[:id]) && get_textfile_list(Presentations).include?(pa)
		session[:presentation]=pa
	else
		session[:presentation]=nil
	end
#	session[:presentation]='skid'
	session[:selected_item]=0
	logger.info "showing #{session[:presentation]}"
	what_next
end
def filechoices?
	false
end
  def start_choices
		if session[:presentation]
			[]
		else
			txl=get_textfile_list Presentations
			logger.info "available presentations #{txl.join(',')}"
			txl
		end
  end
	def selected str
		session[:presentation]=str
		session[:selected_item]=0
		nil
	end
	def backspace
		session[:presentation]=nil
		session[:choices]=nil
		what_next
	end
	def say str
	  session[:spoken]=@spoken=str
	end
	def extras
		@lines=get_page(Presentations,
			get_presentation, get_selected_item)
		logger.info "lines #{@lines.join(';')}"
		if @lines.empty?
			@title=translate('pick a presentation')
			session[:presentation]=nil
			session[:choices]=nil
		else
			@title=@lines.shift
		end
		if session[:speak]
		  say @title
		  session[:speak]=nil
		end
		if @lines[0] &&
			(@lines[0] =~ /(JPG|JPEG|GIF|PNG)$/i)
			@pic=@lines.shift
		end
	end
end