Sweet Sinatra helpers

sinatra_helpers.rb

helpers do
  def site_name
    'Super Happy Fun Site'
  end
  
  # Shows the page title, throw this in your <title> tags
  def page_title
    (@heading + ' &mdash; ' if @heading).to_s + site_name
  end
  
  # Set the page heading and display it as a heading
  # If you use <% %> instead of  <%= %>, you can set the heading without displaying the <h1>
  def heading(text)
    content_tag(:h1, @heading = text)
  end
  
  # Quick, simple links
  def link(text, path = '#', options = {})
    content_tag(:a, text, options.merge!(:href => path))
  end
  
  # Assumes '/images' as your image path
  def image(path, alt, options = {})
    content_tag(:img, nil, options.merge!(:src => "/images/#{path}", :alt => alt))
  end
  
  # Quick and easy tag creation
  def content_tag(tag, content = nil, options = {})
    tag = tag.to_s
    html = "<#{tag}"
    options.each do |attribute, value|
      html << " #{attribute}=\"#{value}\""
    end
    html << (content ? ">#{content}</#{tag}>" : " />")
  end
  
  # Displays a link or just plain text depending on whether the path matches the current route
  def link_unless_current(text, path = nil, options = {})
    path == remove_trailing_information(request.path_info) ? text : link(text, path, options)
  end
  
  # Removes trailing slashes and file extensions
  # (eg. "/flisket", "/flisket/", "/flisket.html" all match "/flisket") 
  def remove_trailing_information(string)
    string.gsub(/.(\/|\..*?)+$/, '')
  end
  
  # Displays a list of errors for a given model
  def errors_for(model)
    return if model.errors.empty?
    content_tag(:ul, model.errors.map { |e| content_tag(:li, e.first) }.uniq, :class => 'errors')
  end
  
  alias_method :h, :escape_html
end