hybrid_routing_behavior.coffee

$(document).on 'click', 'a', (e) ->
  $link = $(e.currentTarget)
  href   = $link.attr('href')

  # we only care about links with http protocol
  isHttp = $link.prop('protocol').indexOf('http') == 0

  # we only care about links to html pages
  allowedFormats = ['html']
  format = getFormatFromUrl(href)
  isAllowedFormat = format in allowedFormats

  # allow this behavior to be disabled with data-pushstate=false
  isPushState = $link.data('pushstate') != false

  # ignore links with data-remote=true
  isRemote = $link.data('remote')

  if !e.isDefaltPrevented() && !isRemote && isHttp && isAllowedFormat && isPushState
    e.preventDefault()

    # trigger the router and make sure the route event is triggered
    app.navigate(href, trigger: true)

# This helper function returns the format of a given url
# (what comes after the '.')
getFormatFromUrl = (url) ->
  dotIndex = url.indexOf('.')
  if dotIndex > 0
    return url.slice(dotIndex+1)
  else
    return 'html'