add_movie.js

// AJAX activity indicators
Ajax.Responders.register({
  onCreate: function() {
    if($('loading') && Ajax.activeRequestCount > 0)
      Effect.Appear('loading', {duration: 0.4, queue: 'end'})
  },
  onComplete: function() {
    if($('loading') && Ajax.activeRequestCount == 0)
      Effect.Fade('loading', {duration: 0.4, queue: 'end'})
  }
})

// Cross-browser AddEvent function
function addEvent(obj, evType, fn) {
  if (obj.addEventListener) {
    obj.addEventListener(evType, fn, false)
    return true
  } else if (obj.attachEvent) {
    var r = obj.attachEvent('on' + evType, fn)
    return r
  } else {
    return false
  }
}

// Clear query parameters in imdb links (added by imdb.com while searching for titles there)
function beautify_imdb_uri(url) {
  var i = url.indexOf('?')
  if (i > 0) {
    return url.substring(0, i)
  } else {
    return url
  }
}

// Attach separate AJAX call to each star
function add_behaviour() {
  // get <a href> stars
  var elements = $A( $('rating').getElementsByTagName('a') )

  elements.each(function(node) {
    node.addEventListener('click', function () {
      var message = $('message')
      if ($F('url').match(/^https?:\/\/.*imdb\.com\/title\/tt([0-9]{7,12})(\/){0,1}.*$/i)) {
        var rating = parseInt(this.id.substr(6))
        // make selected rating 'stuck'
        $A( $('rating').getElementsByTagName('a') ).each( function(el) {
          var id = parseInt(el.id.substr(6))
          if (rating >= id) el.style.background="url(star_rating.gif) bottom left"
          else el.style.backgroundPosition = "top left"
        })
        // execute AJAX call
        Effect.Fade('message', {duration: 0.4, queue: 'end'})
        var pars = 'action=add&rating=' + rating + '&url=' + escape(beautify_imdb_uri($F('url'))) + '&review=' + encodeURIComponent($F('review'))
        new Ajax.Request('../../../wp-admin/tools.php?page=wp_movie_ratings_management', { method: 'post', parameters: pars, onComplete: show_response })
      } else {
        message.setAttribute('class', 'error')
        message.innerHTML = '<p><strong>Error: wrong imdb link.</strong></p>'
        Effect.Appear('message', {duration: 0.4, queue: 'end'})
        $('url').focus()
      }
    }, false)
  })
}

// Focus window and appropriate input field
function initial_focus() {
  // focus window
  if (window.focus) window.focus()

  // focus input -> review, if we have imdb link already or url in another case
  var url = $('url')
  var review = $('review')
  if (url.value.match(/imdb\.com/)) review.focus()
  else url.focus()
}

// Parse url and paste it into <input type="text" name="url"> if it's imdb.com page
function parse_uri() {
  // No url, nothing to parse
  if (location.href.indexOf('?url=') === -1) return

  // Parse and set as url if it is imdb movie page
  var url = unescape(location.href.substring(location.href.indexOf('?url=') + 5))

  if (url.match(/^https?:\/\/.*imdb\.com\/title\/tt([0-9]{7,12})(\/){0,1}.*$/i)) {
    $('url').value = beautify_imdb_uri(url)
  }
}

// Show AJAX response
function show_response(originalRequest) {
  var message = $('message')
  var response = unescape(originalRequest.responseText)
  var matches = response.match(/<div id="message" class="(.+?)">(.*?)<\/div>/i)

  // Not logged in
  if (!matches) {
    message.setAttribute('class', 'error')
      message.innerHTML = '<p><strong>Error: movie rating not added. Perhaps you are not logged in?</strong></p>'
  } else {
    // Valid response
    if (matches.length == 3) {
      message.setAttribute('class', matches[1])
        message.innerHTML = matches[2]
    } else {
      // Unknown error
      message.setAttribute('class', 'error')
        message.innerHTML = '<p><strong>Error: unrecognized AJAX response.</strong></p>'
    }
  }

  // Show message
  Effect.Appear('message', {duration: 0.4, queue: 'end'})

  // Close the pop-up window on successful update
  if (matches && (matches[1] == 'updated fade')) {
    // Close the window (after a little over 1s delay, so you can actually read the message)
    setTimeout("close_window()", 1200);
  }
}

// Empty effects queue and close the window
function close_window() {
  // We clear the effects queue because the browser crashes if you issue a window.close when effects are still running
  Effect.Queues.get('global').each(function (e) { e.cancel(); })
  window.close()
}

// Add onLoad events
addEvent(window, 'load', add_behaviour)
addEvent(window, 'load', parse_uri)
addEvent(window, 'load', initial_focus)