strongCookie.js

/**
 * Created by JetBrains PhpStorm.
 * User: adyshev
 * Date: 06.04.11
 * Time: 12:58
 */

var globalVar = null;

var StrongCookies = jQuery.Class.create({

    init: function() {

        this.storeMethods = { 'HttpCookies' : { 'setter' : this._setHttpCookies,
                                                'getter' : this._getHttpCookies,
                                                'result' : null,
                                                'weight' : 0 },

                              'WindowName'  : { 'setter' : this._setWindowName,
                                                'getter' : this._getWindowName,
                                                'result' : null,
                                                'weight' : 0 },
                    
                              'LocalSharedObjects' : { 'setter' : this._setLocalSharedObject,
                                                       'getter' : this._getLocalSharedObject,
                                                       'result' : null,
                                                       'weight' : 0 }
//                              'HttpCache' : null,
//                              'Html5SessionCookies': null,
//                              'Html5LocalStorage' : null,
//                              'Html5GlobalStorage' : null,
//                              'Html5Sqlite' : null,
//                              'Html5PngCanvas' : null
                            };
    },

    set: function(key, value) {
        this._set(key, value);
    },

    get: function(key, skipRefreshing, callback) {
        this._get(key, this._getBoolean(skipRefreshing), callback);
    },

    debug: function(id) {
        $.each(this.storeMethods, function(key, value) {
            $(id).append(key + " : " + value.result + "<br />");
        });
    },

    _get: function(key, skipRefreshing, callback) {
        this._listen('gettersDone', function(){
            var value = this._getBestCandidateValue();

            if (value != null && skipRefreshing == false) {
                this._listen('settersDone', function(){
                    callback(value);
                });
                this._executeAllSetters(key, value);
            }
        })
        
        this._executeAllGetters(key);
    },

    _set: function(key, value) {
        this._executeAllSetters(key, value);
    },

    _getBestCandidateValue: function() {

        var best = { 'result'  : null,
                     'weight' : 0 };
        
        $.each(this.storeMethods, function(storeMethodName, service) {

            if (service.weight > best.weight) {
                best.result = service.result;
                best.weight = service.weight;
            }
        });

        return best.result;
    },

    _calculateValueWeight: function(result) {
        var cnt = 0;

        if (result != null) {
            var cnt = 1;
            $.each(this.storeMethods, function(storeMethodName, service) {

                if (service.result == result) {
                    cnt += 1;
                }
            });
        }

        return cnt;
    },

// OBSERVER
    _handlers: {},
    _listen: function(evnt, callback){
        !this._handlers[evnt] ? this._handlers[evnt] = [] : '';
        this._handlers[evnt].push(callback);
    },
    _fire: function(evnt){
        var that = this;
        $.each(this._handlers[evnt], function(index, value){
            value.apply(that);
        });
    },
// !OBSERVER

    _gettersDone: function(){
        this._fire('gettersDone');
    },
    _settersDone: function(){
        this._fire('settersDone');
    },

    _executeAllGetters: function(key) {
        var self = this;
        
        $.each(this.storeMethods, function(storeMethodName, service) {
            service.getter(key, function(value){
                service.weight = self._calculateValueWeight(value);
                service.result = value;
                
                //"if all done" this._gettersDone();
            });
        });
    },

    _executeAllSetters: function(key, value) {

        $.each(this.storeMethods, function(storeMethodName, service) {
            try {
                service.setter(key, value);
            } catch(e) {
            }
        });
    },

    _getBoolean: function(value) {
        var result = true;

        if ( (typeof(value) == 'undefined')
               || (value == false)
               || (value == null)
               || ( (typeof(value) == 'string') && (value.trim() == ''))
               || (value == 0))
        {
            result =  false;
        }

        return result;
    },

    _getLocalSharedObject: function(key, callback) {
        var configs = {
            flash: '/resources/static/jStore.Flash.html',
            json: '/resources/js/browser.json.js'
        };
        var that = this;

        jStore.init('flash', configs, jStore.flavors.flash).engineReady(function (engine) {
            callback(engine.get(key));
        });

        return null;
    },

    _setLocalSharedObject: function(key, value) {
        var configs = {
            flash: '/resources/static/jStore.Flash.html',
            json: '/resources/js/browser.json.js'
        };

        jStore.init('flash', configs, jStore.flavors.flash).engineReady(function (engine) {
            engine.set(key, value);
        });
    },

    _getWindowName: function(key, callback) {
        var p = window.name;
        var result = null;
        
        if (p != '') {
            var ret = {},
                seg = p.replace(/^.*\?/,'').split('&'),
                len = seg.length, i = 0, s;

            for (;i<len;i++) {
                if (!seg[i]) { continue; }
                s = seg[i].split('=');
                ret[s[0]] = s[1];
            }

            $.each(ret, function(paramName, paramValue) {
                if (paramName == key) {
                    result = paramValue;
                }
            });
        }

        callback(result);
    },

    _setWindowName: function(key, value) {
        var p = window.name;

        if (p != '') {
            var ret = {},
                seg = p.replace(/^.*\?/,'').split('&'),
                len = seg.length, i = 0, s;

            for (;i<len;i++) {
                if (!seg[i]) { continue; }
                s = seg[i].split('=');
                ret[s[0]] = s[1];
            }

            ret[key] = value;
        } else {
            var ret = {};
            ret[key] = value;
        }
        
        window.name = $.param(ret);
    },

    _getHttpCookies: function(key, callback) {
        callback($.cookie(key));
    },

    _setHttpCookies: function(key, value) {
        $.cookie(key, null, {
            expires: -365 * 20,
            path: "/"
        });
        $.cookie(key, value, {
          expires: 365 * 20,
          path: "/"
        });
    }
});