/**
 * @file
 * Some basic behaviors and utility functions for Views.
 */
(function ($) {

Drupal.Views = {};

/**
 * jQuery UI tabs, Views integration component
 */
Drupal.behaviors.viewsTabs = {
  attach: function (context) {
    if ($.viewsUi && $.viewsUi.tabs) {
      $('#views-tabset').once('views-processed').viewsTabs({
        selectedClass: 'active'
      });
    }

    $('a.views-remove-link').once('views-processed').click(function(event) {
      var id = $(this).attr('id').replace('views-remove-link-', '');
      $('#views-row-' + id).hide();
      $('#views-removed-' + id).attr('checked', true);
      event.preventDefault();
   });
  /**
    * Here is to handle display deletion
    * (checking in the hidden checkbox and hiding out the row)
    */
  $('a.display-remove-link')
    .addClass('display-processed')
    .click(function() {
      var id = $(this).attr('id').replace('display-remove-link-', '');
      $('#display-row-' + id).hide();
      $('#display-removed-' + id).attr('checked', true);
      return false;
  });
  }
};

/**
 * Helper function to parse a querystring.
 */
Drupal.Views.parseQueryString = function (query) {
  var args = {};
  var pos = query.indexOf('?');
  if (pos != -1) {
    query = query.substring(pos + 1);
  }
  var pairs = query.split('&');
  for(var i in pairs) {
    if (typeof(pairs[i]) == 'string') {
      var pair = pairs[i].split('=');
      // Ignore the 'q' path argument, if present.
      if (pair[0] != 'q' && pair[1]) {
        args[decodeURIComponent(pair[0].replace(/\+/g, ' '))] = decodeURIComponent(pair[1].replace(/\+/g, ' '));
      }
    }
  }
  return args;
};

/**
 * Helper function to return a view's arguments based on a path.
 */
Drupal.Views.parseViewArgs = function (href, viewPath) {

  // Provide language prefix.
  if (Drupal.settings.pathPrefix) {
    var viewPath = Drupal.settings.pathPrefix + viewPath;
  }
  var returnObj = {};
  var path = Drupal.Views.getPath(href);
  // Ensure we have a correct path.
  if (viewPath && path.substring(0, viewPath.length + 1) == viewPath + '/') {
    var args = decodeURIComponent(path.substring(viewPath.length + 1, path.length));
    returnObj.view_args = args;
    returnObj.view_path = path;
  }
  return returnObj;
};

/**
 * Strip off the protocol plus domain from an href.
 */
Drupal.Views.pathPortion = function (href) {
  // Remove e.g. http://example.com if present.
  var protocol = window.location.protocol;
  if (href.substring(0, protocol.length) == protocol) {
    // 2 is the length of the '//' that normally follows the protocol
    href = href.substring(href.indexOf('/', protocol.length + 2));
  }
  return href;
};

/**
 * Return the Drupal path portion of an href.
 */
Drupal.Views.getPath = function (href) {
  href = Drupal.Views.pathPortion(href);
  href = href.substring(Drupal.settings.basePath.length, href.length);
  // 3 is the length of the '?q=' added to the url without clean urls.
  if (href.substring(0, 3) == '?q=') {
    href = href.substring(3, href.length);
  }
  var chars = ['#', '?', '&'];
  for (var i in chars) {
    if (href.indexOf(chars[i]) > -1) {
      href = href.substr(0, href.indexOf(chars[i]));
    }
  }
  return href;
};

})(jQuery);
