if (typeof socialsite == 'undefined') socialsite = new function() {

  var baseUrl = 'http://rollerweblogger.org:80/social';
  var nextContainerElementNum = 0;
  var onloadCompleted = false;
  var origOnload = window.onload;
  var context = {};
  var requestItems = {};
  var responseItems = {};
  var currentLightbox = null;

  /*
   * Used for functions which we really consider to be private but
   * have to expose outside of this class.
   */
  this.private = {};

  /**
   * @public
   */
  this.addGadget = function(params) {
    var elementId = ((params.useLightbox) ? randomId() : nextElementId());
    requestItems[elementId] = params;
    if (onloadCompleted == true) callGadgetizer();
  }

  /**
   * @public
   */
  this.addGadgets = function(params) {
    var elementId = ((params.useLightbox) ? randomId() : nextElementId());
    requestItems[elementId] = params;
    if (onloadCompleted == true) callGadgetizer();
  }

  /**
   * @public
   */
  this.setContext = function(params) {
    context = params;
  }

  /**
   * If parameter does not exist, returns an empty string ("").
   * @public
   */
  this.getUrlParam = function(name) {
    var regex = new RegExp("[\\?&]"+name+"=([^&#]*)");
    var results = regex.exec(window.location.href);
    return (results != null) ? results[1] : "";
  }

  this.openLightbox = function(title, url, width, height) {
    // For now, we'll only support one lightbox at a time
    if (this.currentLightbox) {
      this.closeLightbox();
    }
    width = ((width != null) ? width : 600);
    height = ((height != null) ? height : 500);
    this.currentLightbox = jmaki.lbm.addLightbox({
      label: title,
      include: url,
      iframe: true,
      modal: true,
      overflowY: 'auto',
      overflowX: 'auto',
      startWidth: width,
      startHeight: height
    });
  }

  this.closeLightbox = function() {
    if (this.currentLightbox) {
      jmaki.lbm.hideLightbox({targetId:this.currentLightbox.id});
      jmaki.lbm.removeLightbox({targetId:this.currentLightbox.id});
      this.currentLightbox = null;
    }
  }

  /**
   * @private
   */
  this.private.handleServerResponse = function(response) {
    responseItems = response.gadgets;
    if (onloadCompleted == true) {
      createAndRenderGadgets();
    } else {
      // Only load css and libs on the first call
      var css = response.css;
      for (i in css) {
        var link = document.createElement('link');
        link.setAttribute('rel', 'stylesheet');
        link.setAttribute('type', 'text/css');
        link.setAttribute('href', css[i]);
        document.getElementsByTagName('head')[0].appendChild(link);
      }
      var libs = response.libs;
      libs.push(baseUrl+'/gadgets/files/container/socialsite_layoutmanager.js');
      loadLibs(libs, function() {
        jmaki.webRoot = baseUrl+'/';
        var wDir = baseUrl+'/resources/jmaki/lightboxManager';
        jmaki.addExtension({ name: "jmaki.lightboxManager", widgetDir: wDir });
        jmaki.initialize();
        jmaki.lbm = jmaki.getExtension("jmaki.lightboxManager");
        // TODO: provide API for consumers to specify their own onload-like additions
        if (typeof(socialsite_addGadget) == 'function') {
          gadgets.rpc.register('socialsite_addGadget', socialsite_addGadget);
        }
        gadgets.rpc.setRelayUrl(document.location.href);
        if (response.containerHelper && response.containerHelper.spec) {
          var requestItem = {
              'includeChrome': false
          };
          var responseItem = response.containerHelper;
          var containerElement = document.getElementsByTagName('body')[0];
          gadgets.container.containerHelper = createAndRenderGadget(requestItem, responseItem, containerElement);
        }
        createAndRenderGadgets();
        onloadCompleted = true;
      });
    }
  }

  /**
   * @private
   * @param libs an array of javascript URLs
   * @param callback be a function that will be executed once all libs are loaded
   */
  function loadLibs(libs, callback) {
    loadNextLib = function() {
      var lib = libs.pop();
      var script = document.createElement('script');
      script.setAttribute('type', 'text/javascript');
      script.setAttribute('src', lib);
      if (libs.length > 0) {
        script.onload = function() {
          loadNextLib(libs, callback);
        }
        // Need this because IE won't fire the onload event
        script.onreadystatechange = function () {
          if (this.readyState == 'loaded' || this.readyState == 'complete') loadNextLib(libs, callback);
        }
      } else {
        script.onload = function() {
          callback();
        }
        // Need this because IE won't fire the onload event
        script.onreadystatechange = function () {
          if (this.readyState == 'loaded') callback();
        }
      }
      document.getElementsByTagName('head')[0].appendChild(script);
    }
    loadNextLib(libs.reverse());
  }

  /**
   * @private
   */
  function createAndRenderGadgets() {
    for (i in responseItems) {
      if (typeof responseItems[i] !== 'function') {
        var requestItem = requestItems[i];
        for (j in responseItems[i]) {
          if (typeof responseItems[i][j] !== 'function') {
            var responseItem = responseItems[i][j];
            createAndRenderGadget(requestItem, responseItem, document.getElementById(i));
          }
        }
        delete requestItems[i];
      }
    }
  }

  /**
   * @private
   */
  function createAndRenderGadget(requestItem, responseItem, containerElement) {
    gadgets.container.setNoCache(0);
    var title = ((responseItem.title != null) ? responseItem.title : 'Title');
    var height = ((responseItem.height != null) ? responseItem.height : '200px');
    var width = ((responseItem.width != null) ? responseItem.width : '100%');
    var containerId = ((responseItem.containerId != null) ? responseItem.containerId : 'socialsite');
    var removable = ((requestItem.removable != null) ? requestItem.removable : true);
    var includeChrome = ((requestItem.includeChrome != null) ? requestItem.includeChrome : true);
    var serverBase = ((responseItem.serverBase != null) ? (responseItem.serverBase+'/') : (baseUrl+'/gadgets/'));
    var resourceBase = ((responseItem.resourceBase != null) ? (responseItem.resourceBase+'/') : serverBase);
    if (requestItem.useLightbox == true) {
      currentLightbox = jmaki.lbm.addLightbox({
        id: 'gadget-chrome-'+responseItem.moduleId,
        label: title,
        content: ' ',
        iframe: true,
        modal: true,
        overflowY: 'auto',
        overflowX: 'auto',
        startWidth: ((width != '100%') ? width : 500),
        startHeight: ((height != '100%') ? height : 600)
      });
    } else {
      var chrome = document.createElement('div');
      chrome.id = 'gadget-chrome-'+responseItem.moduleId;
      if ((height == 0) && (width == 0)) {
          chrome.style.height = "0px";
          chrome.style.width = "0px";
          chrome.style.overflow = "hidden";
      }
      containerElement.appendChild(chrome);
    }
    var gadget = gadgets.container.createGadget({
      id: responseItem.moduleId,
      moduleId: responseItem.moduleId,
      CONTAINER: containerId,
      specUrl: responseItem.spec,
      title: title,
      height: height,
      width: width,
      removable: removable,
      includeChrome: includeChrome,
      secureToken: responseItem.token
    });
    gadget.setServerBase(serverBase);
    gadget.setResourceBase(resourceBase);
    gadget.setUserPrefs(responseItem.userPrefs);
    gadgets.container.addGadget(gadget);
    gadgets.container.renderGadget(gadget);
    return gadget;
  }

  /*
   * Calls the originally-set onload function (if there was one).
   * Then makes our remote call to the gadgetizerdata service, passing
   * in any addGadget requestItems that were present in our html page.
   */
  window.onload = function() {
    if (origOnload) {
      origOnload();
    }
    callGadgetizer();
  }

  /**
   * @private
   */
  function callGadgetizer() {
    var uri = baseUrl+'/gadgetizerdata';
    uri += '?callback='+encodeURIComponent("socialsite.private.handleServerResponse");
    uri += '&context='+encodeURIComponent(toJsonString(context));
    uri += '&items='+encodeURIComponent(toJsonString(requestItems));
    var script = document.createElement('script');
    script.setAttribute('type', 'text/javascript');
    script.setAttribute('src', uri);
    document.getElementsByTagName('head')[0].appendChild(script);
  }

  /**
   * @private
   */
  function nextElementId() {
    var elementId = 'gadget-container-'+nextContainerElementNum++;
    document.write('<div id="'+elementId+'"></div>');
    return elementId;
  }

  /**
   * @private
   */
  function randomId() {
    return (0x7FFFFFFF * Math.random());
  }

  /**
   * Derived from json.org code.
   * @private
   */
  function toJsonString(arg) {
    return toJsonStringArray(arg).join('');
  }

  /**
   * Derived from json.org code.
   * @private
   */
  function toJsonStringArray(arg, out) {
    out = out || new Array();
    var _undefined;
    switch (typeof arg) {
      case 'object':
        if (arg) {
          if (arg.constructor == Array) {
            out.push('[');
            for (var i = 0; i < arg.length; ++i) {
              if (i > 0)
                out.push(',\n');
              toJsonStringArray(arg[i], out);
            }
            out.push(']');
            return out;
          } else if (typeof arg.toString != 'undefined') {
            out.push('{');
            var first = true;
            for (var i in arg) {
              var curr = out.length; // Record position to allow undo when arg[i] is undefined.
              if (!first)
                out.push(',\n');
              toJsonStringArray(i, out);
              out.push(':');
              toJsonStringArray(arg[i], out);
              if (out[out.length - 1] == _undefined)
                out.splice(curr, out.length - curr);
              else
                first = false;
            }
            out.push('}');
            return out;
          }
          return out;
        }
        out.push('null');
        return out;
      case 'unknown':
      case 'undefined':
      case 'function':
        out.push(_undefined);
        return out;
      case 'string':
        out.push('"')
        out.push(arg.replace(/(["\\])/g, '\$1').replace(/\r/g, '').replace(/\n/g, '\\n'));
        out.push('"');
        return out;
      default:
        out.push(String(arg));
        return out;
    }
  }

}