/**
 * @file base.js
 *
 * Some basic behaviors and utility functions for Views.
 */

Drupal.Views = {};

/**
 * jQuery UI tabs, Views integration component
 */
Drupal.behaviors.viewsTabs = function (context) {
  $('#views-tabset:not(.views-processed)').addClass('views-processed').each(function() {
    new Drupal.Views.Tabs($(this), {selectedClass: 'active'});
  });

  $('a.views-remove-link')
    .addClass('views-processed')
    .click(function() {
      var id = $(this).attr('id').replace('views-remove-link-', '');
      $('#views-row-' + id).hide();
      $('#views-removed-' + id).attr('checked', true);
      return false;
    });
}

/**
 * For IE, attach some javascript so that our hovers do what they're supposed
 * to do.
 */
Drupal.behaviors.viewsHoverlinks = function() {
  if ($.browser.msie) {
    // If IE, attach a hover event so we can see our admin links.
    $("div.view:not(.views-hover-processed)").addClass('views-hover-processed').hover(
      function() {
        $('div.views-hide', this).addClass("views-hide-hover"); return true;
      },
      function(){
        $('div.views-hide', this).removeClass("views-hide-hover"); return true;
      }
    );
    $("div.views-admin-links:not(.views-hover-processed)")
      .addClass('views-hover-processed')
      .hover(
        function() {
          $(this).addClass("views-admin-links-hover"); return true;
        },
        function(){
          $(this).removeClass("views-admin-links-hover"); return true;
        }
      );
  }
}

/**
 * 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[pair[0]] = 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) {
  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 (i in chars) {
    if (href.indexOf(chars[i]) > -1) {
      href = href.substr(0, href.indexOf(chars[i]));
    }
  }
  return href;
};
