// -----
// aoaoa.js: Aspects Of Ajax Open Ajax compatible hub implementation
// This implementation is cut out of the open source AjaxEngine project,
// that includes a implementation inside the Javascript Common behaviors Library (jcl.js).
// See http://www.mathertel.de/AJAXEngine/controls/jcl.js
// Copyright (c) by Matthias Hertel, http://www.mathertel.de
// This work is licensed under a BSD style license. See http://www.mathertel.de/License.aspx
// More information on: http://ajaxaspects.blogspot.com/ and http://ajaxaspekte.blogspot.com/
// -----
// 06.06.2007 created

if (typeof(window.OpenAjax) == "undefined") {
  // setup the OpenAjax framework - hub
  window.OpenAjax = {};
} // if

if (typeof(OpenAjax.hub) == "undefined") {
  // a hub implementation
  OpenAjax.hub = {
  implementer: "http://www.mathertel.de/OpenAjax",
  implVersion: "0.4",
  specVersion: "0.5",
  implExtraData: {},

  // ----- library management -----

  // the list of libraries that have registered
  libraries: {},

  // Registers an Ajax library with the OpenAjax Hub. 
  registerLibrary: function (p, u, v, e) {
    var entry = { prefix: p, namespaceURI: u, version: v, extraData:e };
    this.libraries[p] = entry;
    this.publish("org.openajax.hub.registerLibrary", entry);
  },

  // Unregisters an Ajax library with the OpenAjax Hub.
  unregisterLibrary: function (p) {
    var entry = this.libraries[p];
    this.publish("org.openajax.hub.unregisterLibrary", entry);
    if (entry != null)
      this.libraries[p] = null;
  },

  // ----- event management -----

  _regs: {},
  _regsId: 0,

  /// name, callback, scope, data, filter
  subscribe: function (n, c, s, d, f) {
    var h = this._regsId;

    s = s || window;

    // treating upper/lowercase equal is not clearly defined, but true with domain names.
    var rn = n.toLocaleLowerCase();

    // build a regexp pattern that will match the event names
    rn = rn.replace(/\*\*$/, "\S{0,}").replace(/\./g, "\\.").replace(/\*/g, "[^.]*");

    var entry = {id:h, n:rn, c:c, s:s, d:d, f:f};
    this._regs[h] = entry;

    this._regsId++;
    return(h);
  }, // subscribe


  unsubscribe: function (h) {
    this._regs[h] = null;
  }, // unsubscribe


  publish: function (n, data) {
    n = n.toLocaleLowerCase();
    for (var h in this._regs) {
      var r = this._regs[h];
      if (r && (n.match(r.n))) {
        var ff = r.f; if (typeof(ff) == "string") ff = r.s[ff];
        var fc = r.c; if (typeof(fc) == "string") fc = r.s[fc];
        if ((ff == null) || (ff.call(r.s, n, data, r.d)))
          fc.call(r.s, n, data, r.d)
      } // if
    } // for
  } // publish

  } // OpenAjax.hub
  OpenAjax.hub.registerLibrary("aoa", "http://www.mathertel.de/OpenAjax", "0.4", {});

} // if (! hub)

// ----- End -----