☰

Facebook Hide Posts

Script provides buttons for quick hiding multiple posts on facebook groups. You can hide posts up to certain publish date, and remember them in storage object, so after page reload they will stay hidden.

// ==UserScript==
// @name            Facebook Hide Posts
// @namespace       facebook
// @author          DominikStyp
// @copyright       2015, DominikStyp
// @homepageURL     https://github.com/DominikStyp
// @description     Script provides buttons for quick hiding multiple posts on facebook groups. You can hide posts up to certain publish date, and remember them in storage object, so after page reload they will stay hidden.
// @license         GPL Public License
// @include         http://*.facebook.com/*
// @include         https://*.facebook.com/*
// @match           http://*.facebook.com/*
// @match           https://*.facebook.com/*
// @exclude         http://*.facebook.com/ajax/*
// @exclude         https://*.facebook.com/ajax/*
// @version     1
// @grant       none
// ==/UserScript==

/**
 * If you want to use this script (or more than 20% of the code) please do not remove this comment.
 * author: [email protected]
 * url: https://github.com/DominikStyp
 */





window.addEventListener('load', FacebookHidePostWhole);


function FacebookHidePostWhole() {

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 * http://www.JSON.org/json2.js 2011-02-23
 */
var JSON;JSON||(JSON={}),function(){"use strict";function f(t){return 10>t?"0"+t:t}function quote(t){return escapable.lastIndex=0,escapable.test(t)?'"'+t.replace(escapable,function(t){var e=meta[t];return"string"==typeof e?e:"\\u"+("0000"+t.charCodeAt(0).toString(16)).slice(-4)})+'"':'"'+t+'"'}function str(t,e){var r,n,o,f,u,i=gap,p=e[t];switch(p&&"object"==typeof p&&"function"==typeof p.toJSON&&(p=p.toJSON(t)),"function"==typeof rep&&(p=rep.call(e,t,p)),typeof p){case"string":return quote(p);case"number":return isFinite(p)?String(p):"null";case"boolean":case"null":return String(p);case"object":if(!p)return"null";if(gap+=indent,u=[],"[object Array]"===Object.prototype.toString.apply(p)){for(f=p.length,r=0;f>r;r+=1)u[r]=str(r,p)||"null";return o=0===u.length?"[]":gap?"[\n"+gap+u.join(",\n"+gap)+"\n"+i+"]":"["+u.join(",")+"]",gap=i,o}if(rep&&"object"==typeof rep)for(f=rep.length,r=0;f>r;r+=1)"string"==typeof rep[r]&&(n=rep[r],o=str(n,p),o&&u.push(quote(n)+(gap?": ":":")+o));else for(n in p)Object.prototype.hasOwnProperty.call(p,n)&&(o=str(n,p),o&&u.push(quote(n)+(gap?": ":":")+o));return o=0===u.length?"{}":gap?"{\n"+gap+u.join(",\n"+gap)+"\n"+i+"}":"{"+u.join(",")+"}",gap=i,o}}"function"!=typeof Date.prototype.toJSON&&(Date.prototype.toJSON=function(){return isFinite(this.valueOf())?this.getUTCFullYear()+"-"+f(this.getUTCMonth()+1)+"-"+f(this.getUTCDate())+"T"+f(this.getUTCHours())+":"+f(this.getUTCMinutes())+":"+f(this.getUTCSeconds())+"Z":null},String.prototype.toJSON=Number.prototype.toJSON=Boolean.prototype.toJSON=function(){return this.valueOf()});var cx=/[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,escapable=/[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,gap,indent,meta={"\b":"\\b","  ":"\\t","\n":"\\n","\f":"\\f","\r":"\\r",'"':'\\"',"\\":"\\\\"},rep;"function"!=typeof JSON.stringify&&(JSON.stringify=function(t,e,r){var n;if(gap="",indent="","number"==typeof r)for(n=0;r>n;n+=1)indent+=" ";else"string"==typeof r&&(indent=r);if(rep=e,e&&"function"!=typeof e&&("object"!=typeof e||"number"!=typeof e.length))throw new Error("JSON.stringify");return str("",{"":t})}),"function"!=typeof JSON.parse&&(JSON.parse=function(text,reviver){function walk(t,e){var r,n,o=t[e];if(o&&"object"==typeof o)for(r in o)Object.prototype.hasOwnProperty.call(o,r)&&(n=walk(o,r),void 0!==n?o[r]=n:delete o[r]);return reviver.call(t,e,o)}var j;if(text=String(text),cx.lastIndex=0,cx.test(text)&&(text=text.replace(cx,function(t){return"\\u"+("0000"+t.charCodeAt(0).toString(16)).slice(-4)})),/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,"@").replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,"]").replace(/(?:^|:|,)(?:\s*\[)+/g,"")))return j=eval("("+text+")"),"function"==typeof reviver?walk({"":j},""):j;throw new SyntaxError("JSON.parse")})}();

/**
 * JStorage
 * Author: Andris Reinman, [email protected]
 * Project homepage: www.jstorage.info
 */     
!function(){"use strict";function e(){var e=!1;if("localStorage"in window)try{window.localStorage.setItem("_tmptest","tmpval"),e=!0,window.localStorage.removeItem("_tmptest")}catch(t){}if(e)try{window.localStorage&&(b=window.localStorage,T="localStorage",O=b.jStorage_update)}catch(o){}else if("globalStorage"in window)try{window.globalStorage&&(b="localhost"==window.location.hostname?window.globalStorage["localhost.localdomain"]:window.globalStorage[window.location.hostname],T="globalStorage",O=b.jStorage_update)}catch(n){}else{if(y=document.createElement("link"),!y.addBehavior)return void(y=null);y.style.behavior="url(#default#userData)",document.getElementsByTagName("head")[0].appendChild(y);try{y.load("jStorage")}catch(i){y.setAttribute("jStorage","{}"),y.save("jStorage"),y.load("jStorage")}var u="{}";try{u=y.getAttribute("jStorage")}catch(g){}try{O=y.getAttribute("jStorage_update")}catch(l){}b.jStorage=u,T="userDataBehavior"}s(),c(),r(),_(),"addEventListener"in window&&window.addEventListener("pageshow",function(e){e.persisted&&a()},!1)}function t(){var e="{}";if("userDataBehavior"==T){y.load("jStorage");try{e=y.getAttribute("jStorage")}catch(t){}try{O=y.getAttribute("jStorage_update")}catch(r){}b.jStorage=e}s(),c(),_()}function r(){"localStorage"==T||"globalStorage"==T?"addEventListener"in window?window.addEventListener("storage",a,!1):document.attachEvent("onstorage",a):"userDataBehavior"==T&&setInterval(a,1e3)}function a(){var e;clearTimeout(L),L=setTimeout(function(){if("localStorage"==T||"globalStorage"==T)e=b.jStorage_update;else if("userDataBehavior"==T){y.load("jStorage");try{e=y.getAttribute("jStorage_update")}catch(t){}}e&&e!=O&&(O=e,o())},25)}function o(){var e,r=h.parse(h.stringify(p.__jstorage_meta.CRC32));t(),e=h.parse(h.stringify(p.__jstorage_meta.CRC32));var a,o=[],i=[];for(a in r)if(r.hasOwnProperty(a)){if(!e[a]){i.push(a);continue}r[a]!=e[a]&&"2."==String(r[a]).substr(0,2)&&o.push(a)}for(a in e)e.hasOwnProperty(a)&&(r[a]||o.push(a));n(o,"updated"),n(i,"deleted")}function n(e,t){e=[].concat(e||[]);var r,a,o,n;if("flushed"==t){e=[];for(var i in C)C.hasOwnProperty(i)&&e.push(i);t="deleted"}for(r=0,o=e.length;o>r;r++){if(C[e[r]])for(a=0,n=C[e[r]].length;n>a;a++)C[e[r]][a](e[r],t);if(C["*"])for(a=0,n=C["*"].length;n>a;a++)C["*"][a](e[r],t)}}function i(){var e=(+new Date).toString();if("localStorage"==T||"globalStorage"==T)try{b.jStorage_update=e}catch(t){T=!1}else"userDataBehavior"==T&&(y.setAttribute("jStorage_update",e),y.save("jStorage"));a()}function s(){if(b.jStorage)try{p=h.parse(String(b.jStorage))}catch(e){b.jStorage="{}"}else b.jStorage="{}";v=b.jStorage?String(b.jStorage).length:0,p.__jstorage_meta||(p.__jstorage_meta={}),p.__jstorage_meta.CRC32||(p.__jstorage_meta.CRC32={})}function u(){d();try{b.jStorage=h.stringify(p),y&&(y.setAttribute("jStorage",b.jStorage),y.save("jStorage")),v=b.jStorage?String(b.jStorage).length:0}catch(e){}}function g(e){if("string"!=typeof e&&"number"!=typeof e)throw new TypeError("Key name must be string or numeric");if("__jstorage_meta"==e)throw new TypeError("Reserved key name");return!0}function c(){var e,t,r,a,o=1/0,s=!1,g=[];if(clearTimeout(m),p.__jstorage_meta&&"object"==typeof p.__jstorage_meta.TTL){e=+new Date,r=p.__jstorage_meta.TTL,a=p.__jstorage_meta.CRC32;for(t in r)r.hasOwnProperty(t)&&(r[t]<=e?(delete r[t],delete a[t],delete p[t],s=!0,g.push(t)):r[t]<o&&(o=r[t]));1/0!=o&&(m=setTimeout(c,Math.min(o-e,2147483647))),s&&(u(),i(),n(g,"deleted"))}}function _(){var e,t;if(p.__jstorage_meta.PubSub){var r,a=D,o=[];for(e=t=p.__jstorage_meta.PubSub.length-1;e>=0;e--)r=p.__jstorage_meta.PubSub[e],r[0]>D&&(a=r[0],o.unshift(r));for(e=o.length-1;e>=0;e--)l(o[e][1],o[e][2]);D=a}}function l(e,t){if(P[e])for(var r=0,a=P[e].length;a>r;r++)try{P[e][r](e,h.parse(h.stringify(t)))}catch(o){}}function d(){if(p.__jstorage_meta.PubSub){for(var e=+new Date-2e3,t=0,r=p.__jstorage_meta.PubSub.length;r>t;t++)if(p.__jstorage_meta.PubSub[t][0]<=e){p.__jstorage_meta.PubSub.splice(t,p.__jstorage_meta.PubSub.length-t);break}p.__jstorage_meta.PubSub.length||delete p.__jstorage_meta.PubSub}}function f(e,t){p.__jstorage_meta||(p.__jstorage_meta={}),p.__jstorage_meta.PubSub||(p.__jstorage_meta.PubSub=[]),p.__jstorage_meta.PubSub.unshift([+new Date,e,t]),u(),i()}function S(e,t){for(var r,a=e.length,o=t^a,n=0;a>=4;)r=255&e.charCodeAt(n)|(255&e.charCodeAt(++n))<<8|(255&e.charCodeAt(++n))<<16|(255&e.charCodeAt(++n))<<24,r=1540483477*(65535&r)+((1540483477*(r>>>16)&65535)<<16),r^=r>>>24,r=1540483477*(65535&r)+((1540483477*(r>>>16)&65535)<<16),o=1540483477*(65535&o)+((1540483477*(o>>>16)&65535)<<16)^r,a-=4,++n;switch(a){case 3:o^=(255&e.charCodeAt(n+2))<<16;case 2:o^=(255&e.charCodeAt(n+1))<<8;case 1:o^=255&e.charCodeAt(n),o=1540483477*(65535&o)+((1540483477*(o>>>16)&65535)<<16)}return o^=o>>>13,o=1540483477*(65535&o)+((1540483477*(o>>>16)&65535)<<16),o^=o>>>15,o>>>0}var j="0.4.12",w=window.jQuery||window.$||(window.$={}),h={parse:window.JSON&&(window.JSON.parse||window.JSON.decode)||String.prototype.evalJSON&&function(e){return String(e).evalJSON()}||w.parseJSON||w.evalJSON,stringify:Object.toJSON||window.JSON&&(window.JSON.stringify||window.JSON.encode)||w.toJSON};if("function"!=typeof h.parse||"function"!=typeof h.stringify)throw new Error("No JSON support found, include //cdnjs.cloudflare.com/ajax/libs/json2/20110223/json2.js to page");var m,p={__jstorage_meta:{CRC32:{}}},b={jStorage:"{}"},y=null,v=0,T=!1,C={},L=!1,O=0,P={},D=+new Date,A={isXML:function(e){var t=(e?e.ownerDocument||e:0).documentElement;return t?"HTML"!==t.nodeName:!1},encode:function(e){if(!this.isXML(e))return!1;try{return(new XMLSerializer).serializeToString(e)}catch(t){try{return e.xml}catch(r){}}return!1},decode:function(e){var t,r="DOMParser"in window&&(new DOMParser).parseFromString||window.ActiveXObject&&function(e){var t=new ActiveXObject("Microsoft.XMLDOM");return t.async="false",t.loadXML(e),t};return r?(t=r.call("DOMParser"in window&&new DOMParser||window,e,"text/xml"),this.isXML(t)?t:!1):!1}};w.jStorage={version:j,set:function(e,t,r){if(g(e),r=r||{},"undefined"==typeof t)return this.deleteKey(e),t;if(A.isXML(t))t={_is_xml:!0,xml:A.encode(t)};else{if("function"==typeof t)return void 0;t&&"object"==typeof t&&(t=h.parse(h.stringify(t)))}return p[e]=t,p.__jstorage_meta.CRC32[e]="2."+S(h.stringify(t),2538058380),this.setTTL(e,r.TTL||0),n(e,"updated"),t},get:function(e,t){return g(e),e in p?p[e]&&"object"==typeof p[e]&&p[e]._is_xml?A.decode(p[e].xml):p[e]:"undefined"==typeof t?null:t},deleteKey:function(e){return g(e),e in p?(delete p[e],"object"==typeof p.__jstorage_meta.TTL&&e in p.__jstorage_meta.TTL&&delete p.__jstorage_meta.TTL[e],delete p.__jstorage_meta.CRC32[e],u(),i(),n(e,"deleted"),!0):!1},setTTL:function(e,t){var r=+new Date;return g(e),t=Number(t)||0,e in p?(p.__jstorage_meta.TTL||(p.__jstorage_meta.TTL={}),t>0?p.__jstorage_meta.TTL[e]=r+t:delete p.__jstorage_meta.TTL[e],u(),c(),i(),!0):!1},getTTL:function(e){var t,r=+new Date;return g(e),e in p&&p.__jstorage_meta.TTL&&p.__jstorage_meta.TTL[e]?(t=p.__jstorage_meta.TTL[e]-r,t||0):0},flush:function(){return p={__jstorage_meta:{CRC32:{}}},u(),i(),n(null,"flushed"),!0},STORAGE_OBJ:function(){function e(){}return e.prototype=p,new e},index:function(){var e,t=[];for(e in p)p.hasOwnProperty(e)&&"__jstorage_meta"!=e&&t.push(e);return t},storageSize:function(){return v},currentBackend:function(){return T},storageAvailable:function(){return!!T},listenKeyChange:function(e,t){g(e),C[e]||(C[e]=[]),C[e].push(t)},stopListening:function(e,t){if(g(e),C[e]){if(!t)return void delete C[e];for(var r=C[e].length-1;r>=0;r--)C[e][r]==t&&C[e].splice(r,1)}},subscribe:function(e,t){if(e=(e||"").toString(),!e)throw new TypeError("Channel not defined");P[e]||(P[e]=[]),P[e].push(t)},publish:function(e,t){if(e=(e||"").toString(),!e)throw new TypeError("Channel not defined");f(e,t)},reInit:function(){t()},noConflict:function(e){return delete window.$.jStorage,e&&(window.jStorage=this),this}},e()}();


/**
 * JQuery Cookie (compressed)
 * https://github.com/carhartl/jquery-cookie
**/
!function(e){"function"==typeof define&&define.amd?define(["jquery"],e):"object"==typeof exports?module.exports=e(require("jquery")):e(jQuery)}(function(e){function n(e){return u.raw?e:encodeURIComponent(e)}function o(e){return u.raw?e:decodeURIComponent(e)}function i(e){return n(u.json?JSON.stringify(e):String(e))}function t(e){0===e.indexOf('"')&&(e=e.slice(1,-1).replace(/\\"/g,'"').replace(/\\\\/g,"\\"));try{return e=decodeURIComponent(e.replace(c," ")),u.json?JSON.parse(e):e}catch(n){}}function r(n,o){var i=u.raw?n:t(n);return e.isFunction(o)?o(i):i}var c=/\+/g,u=e.cookie=function(t,c,s){if(arguments.length>1&&!e.isFunction(c)){if(s=e.extend({},u.defaults,s),"number"==typeof s.expires){var a=s.expires,d=s.expires=new Date;d.setMilliseconds(d.getMilliseconds()+864e5*a)}return document.cookie=[n(t),"=",i(c),s.expires?"; expires="+s.expires.toUTCString():"",s.path?"; path="+s.path:"",s.domain?"; domain="+s.domain:"",s.secure?"; secure":""].join("")}for(var f=t?void 0:{},p=document.cookie?document.cookie.split("; "):[],l=0,m=p.length;m>l;l++){var x=p[l].split("="),g=o(x.shift()),j=x.join("=");if(t===g){f=r(j,c);break}t||void 0===(j=r(j))||(f[g]=j)}return f};u.defaults={},e.removeCookie=function(n,o){return e.cookie(n,"",e.extend({},o,{expires:-1})),!e.cookie(n)}});



if (true) {
      if( typeof jQuery == "undefined" ){
        throw "I couldn't load jQuery library";
      }
      jQuery(function($) {
            "use strict";
            /**
             * Informational div class, appends div absolutely positioned into the document and allows to display it next to any HTML element
             * APPLICATION INDEPENDEND CLASS
             * DEPENDENT ON: jQuery library
             */
            
            function InfoAbsoluteDivClass(OPTIONS) {
                    "use strict";
                    if(typeof $ == "undefined"){
                        throw "jQuery library not found!!";
                    }
                    $.extend(OPTS,OPTIONS);
                    var INFO_DIV_CLASS = this;
                    var uniqueId = "InfoAbsoluteDiv"+((new Date()).getTime());
                    
                    var getInfoDivStyle = function(){
                           return INFO_DIV_CLASS.getIdWithHash() + ' { ' + OPTS.css + ' } ';
                    };
                    
                    var OPTS = {
                          rightFromObject: 70,
                          upFromObject: 70,
                          css: 'position:absolute; padding:20px 30px; top:0; left:0; border:1px solid black; background:#fff; z-index:9999; font-size:15px; display:none;'
                  };
                    ////////////////// PUBLIC /////////////////////////////////////////////////////////
                    
                    this.appendToDocument = function(){
                           $('head').append("<style>" + getInfoDivStyle() + "</style>");
                            var div = '<div id="'+ INFO_DIV_CLASS.getId() + '">&nbsp;</div>';
                            $(document.body).prepend(div);
                    };
                    this.showNextToObject = function(currentObject, info){
                        var obj = $(currentObject);
                        var position = obj.offset();
                        var pTop = (parseInt(position.top) - OPTS.upFromObject);
                        var pLeft =  (parseInt(position.left) + OPTS.rightFromObject);
                        $(INFO_DIV_CLASS.getIdWithHash()).css({ left:pLeft+"px", top:pTop+"px"}).html(info).show();
                    };
                    this.hide = function(){
                        $(INFO_DIV_CLASS.getIdWithHash()).hide();
                    }; 
                    this.getId = function(){
                        return uniqueId;
                    };
                    this.getIdWithHash = function(){
                        return "#" + uniqueId;
                    };
                    
            }
            ///////////////////////////// STORAGE IMPLEMENTATION WITH jStorage usage ////////////////////////////////////////////////////////
            /**
             * storage object is a class that uses jStorage library to easy set, get and remove values from it
             * APPLICATION INDEPENDENT CLASS
             * example usage:
             * 
             * var SO = new StorageObjectClass();
             * SO.setValue("OK");  //value is stored in StorageObjectClass
             * console.log( SO.getValue() ); // "OK"
             * 
             */
            
            function StorageObjectClass(OPTIONS){
                "use strict";
                if(typeof $ == "undefined"){
                    throw "jQuery library not found!!";
                }
                if(typeof $.jStorage == "undefined"){
                    throw "jStorage plugin not found!!";
                }
                
                var OPTS = {
                        keyName: "facebookHidePost",
                        TTL: 1000*3600*24*356 /* 1 year */ 
                };
                $.extend(OPTS,OPTIONS);
                $.jStorage.setTTL(OPTS.keyName, OPTS.TTL);
                $.jStorage.reInit();
                  this.getValue = function(){
                        return $.jStorage.get(OPTS.keyName, "");
                };
                this.getSize = function(){
                        return $.jStorage.storageSize(OPTS.keyName);
                };
                this.setValue = function(value){
                        $.jStorage.set(OPTS.keyName, value, { TTL: OPTS.TTL });
                };
                this.removeValue = function(){
                        $.jStorage.deleteKey(OPTS.keyName);
                };
                this.reInit = function(){
                        $.jStorage.reInit();
                };
         }
            
            
  /** class used to bind MutationObserver events to the specified elements (selector)
  *   which is triggerd while elements are changed dynamically
  *   more: https://developer.mozilla.org/en-US/docs/Web/API/MutationObserver
  *   APPLICATION INDEPENDENT CLASS
  *   DEPENDENT ON: jQuery library
  *   example usage:
  *   
  *   var MO = new MutationObserverClass()
  *   MO.observeAddedNodesIn("#myDiv", function(addedNodes){ $(addedNodes).remove() } ); //instantly remove added nodes
  */
    function MutationObserverClass(OPTIONS){
            "use strict";
            if(typeof $ == "undefined"){
                    throw "jQuery library not found!!";
            }
            var OPTS = {
              defaultAddedConfig: { childList: true, characterData: true, attributes: true, subtree: true },
              filterCSSRule: "" /** Adds jQuery css filter rule jQuery(mutation.addedNodes).filter(filterCSSRule) */
            };
            $.extend(OPTS,OPTIONS);
            
            var addedNodesAdditionalCallbacks = [];
            
            /**
             * You can pass additional callback to once defined mutation observer,
             * So it will be called while nodes will be added to the observed container 
             */
            this.addAddedNodesCallback = function(callback){
                if(typeof callback != "function"){
                    throw "callback is not a function";
                }
                addedNodesAdditionalCallbacks.push(callback);
            };
            
            this.clearAddedNodesCallbacks = function(){
                addedNodesAdditionalCallbacks = [];
            };
            this.observeAddedNodesIn = function(selector, mutationAddedNodesCallback){  
                   function addedNodesHandler(mutationRecords) {      
                          mutationRecords.forEach(function(mutation) {
                              if (typeof mutation.addedNodes == "object") {
                                  var addedNodes = $(mutation.addedNodes);
                                  if(OPTS.filterCSSRule.length > 0){
                                      addedNodes = addedNodes.filter(OPTS.filterCSSRule);
                                  }
                                  if(addedNodesAdditionalCallbacks.length > 0){
                                      for (var i=0; i<addedNodesAdditionalCallbacks.length; i++){
                                          addedNodesAdditionalCallbacks[i](addedNodes);
                                      }
                                  }
                                  mutationAddedNodesCallback(addedNodes);
                              }
                          });
                      }; 
                      var MO     = window.MutationObserver || window.WebKitMutationObserver;
                      var OBS    = new MO (addedNodesHandler);
                      var nodes  = $(selector);
                      //--- Add a target node to the observer. Can only add one node at a time.
                      nodes.each ( function () {
                            OBS.observe (this, OPTS.defaultAddedConfig);
                      } );
            };
    }
    
    /**
     * Miscellaneous tools
     * APPLICATION INDEPENDENT CLASS 
     * DEPENDENT ON LIBRARIES: jQuery
     */
    function DominikToolsClass(OPTIONS){
            "use strict";
            if(typeof $ == "undefined"){
                    throw "jQuery library not found!!";
                    return;
            }
            var OPTS = {};
            $.extend(OPTS,OPTIONS);
            var DOMINIK_TOOLS = this;
            this.array = {
                    toString: function(arr) {
                      return arr.join(',');
                    }   
            };
            this.string = {
                    toArray: function(str) {
                      if (typeof str == 'undefined' || str == '') {
                        return [];
                      }
                      return str.split(',');
                    },
                    
                   /** Function count the occurrences of substring in a string;
                     * http://stackoverflow.com/questions/4009756/how-to-count-string-occurrence-in-string
                     * @param {String} string   Required. The string;
                     * @param {String} subString    Required. The string to search for;
                     * @param {Boolean} allowOverlapping    Optional. Default: false;
                     */
                   occurrencesOfSubstring: function (string, subString, allowOverlapping){
                        string+=""; subString+="";
                        if(subString.length<=0) return string.length+1;
                    
                        var n=0, pos=0;
                        var step=(allowOverlapping)?(1):(subString.length);
                    
                        while(true){
                            pos=string.indexOf(subString,pos);
                            if(pos>=0){ n++; pos+=step; } else break;
                        }
                        return(n);
                    },
                    /**
                     * This function is substitute to: 
                     * "aa,bb,cc".split(",").length 
                     * 
                     */
                    countLikeSplittedArray: function(string, separator){
                        if(string.length < 1){
                            return 0;
                        }
                        var occurences = DOMINIK_TOOLS.string.occurrencesOfSubstring(string,separator);
                        return (occurences + 1);
                    },
                    /**
                     * Function checks if @search param is in the @baseStr, but as it would be an array splitted by @separator
                     * In other words this code:
                     *    function searchBySplit(str){
                     *        var arr = str.split(",");
                     *        for(var i=0; i<arr.length; i++){ 
                     *          if("aa" == arr[i]){ return true; } 
                     *        }
                     *        return false;
                     *    } 
                     * Can be replaced by:
                     *     DOMINIK_TOOLS.string.checkLikeInArray("aa,bb,cc", "aa", ",");
                     */
                    checkLikeInArray: function(baseStr, search, separator){
                                var r1 = new RegExp('^'+search+'$',"g");
                                var r2 = new RegExp(separator+search+'$',"g");
                                var r3 = new RegExp('^'+search+separator,"g");
                                var r4 = new RegExp(separator+search+separator,"g");
                                if(baseStr.match(r1) || baseStr.match(r2) || baseStr.match(r3) || baseStr.match(r4)){
                                    return true;
                                } else {
                                    return false;
                                }
                    }
            };
            this.debug = function (str){
                       console.log(str);
            };
            this.globalVar = {
                    set: function(name, value){
                        $.data( this, name, value);
                    },
                    get: function (name){
                        return $.data( this, name);
                    }
            };
            this.date = {
                      /**
                       *  
                       * Example usage: 
                       * parseDateDDMMYYYY("25-03-2011").getTime(); 
                       */
                      parseDateDDMMYYYY: function(str){
                                      var parts = str.split("-");
                                      var dt = new Date(parseInt(parts[2], 10),
                                                        parseInt(parts[1], 10) - 1,
                                                        parseInt(parts[0], 10));
                                      return dt;
                    },
                    /**
                     * Returns date in format: DD-MM-YYYY (with leading zeros) 
                     */
                    DDMMYYYYFromMicrotime: function(microtime){
                                    var date = new Date(microtime*1000);
                                    //slice gives last 2 characters of the string
                                    var day = ('0' + date.getDate()).slice(-2);
                                    var month = ('0' + (date.getMonth()+1)).slice(-2);
                                    var year = date.getFullYear();
                                    return day+"-"+month+"-"+year;
                    }
            };
    }
    
    
    /** Strictly for facebook different useful tools 
     * DEPENDENT ON LIBRARIES: DominikToolsClass, StorageObjectClass, jQuery
     * 
     * 
     */
    
    function facebookTools(OPTIONS){
        "use strict";
        
        if(typeof $ == "undefined"){
                    throw "jQuery library not found!!";
                    return;
        }
        /* @var FACEBOOK_TOOLS facebookTools */
        var FACEBOOK_TOOLS = this;
        
      var OPTS = {
          hidePostLinkCSSClass: 'hideFacebookPostLink',
          hidePostsLinksCSSRules: 'padding:0px 10px 5px 0px;font-weight:bold;font-size:12px;display:block; float:left;',
          groupPostsCSS: 'div[id="contentArea"]', 
          postCSS: 'div[id^="mall_post_"]'
      };
         OPTS.STORAGE_OBJ = new StorageObjectClass(); 
         OPTS.DOMINIK_TOOLS = new DominikToolsClass();
         OPTS.INFO_ABSOLUTE_DIV = new InfoAbsoluteDivClass();
         OPTS.MUTATION_OBSERVER = new MutationObserverClass({ filterCSSRule: OPTS.postCSS }); //same rule for postCSS
      
         $.extend(OPTS,OPTIONS);  
        
         this.getOPTS = function(){
             return OPTS;
         };
                 
        this.checkIfPostsAreLoaded = function(){
           return $(OPTS.postCSS).size() > 0;
        };
        
       this.getFacebookPostIdByDivId = function (strId) {
                          if (strId.indexOf('_') == - 1) {
                            OPTS.DOMINIK_TOOLS.debug('Error parsing facebook post id... wrong div id format: ' + strId);
                            return null;
                          }
                          var s = strId.split('_') [2];
                          if(s.length < 1){
                              OPTS.DOMINIK_TOOLS.debug('Error parsing facebook post id... can\'t split post id string: ' + strId);
                            return null;
                          }
                          return s;
             };
    
       this.removePosts = function(){
                           OPTS.STORAGE_OBJ.removeValue();
            };
  
       this.getPostsIdsArray = function(){
                    try {
                      var store = OPTS.STORAGE_OBJ.getValue();
                    } catch (err){
                      console.log(err);
                    }
                    return OPTS.DOMINIK_TOOLS.string.toArray(  store );
            };
            
       this.getPostsIdsArrayLength = function(){
              return OPTS.DOMINIK_TOOLS.string.countLikeSplittedArray(OPTS.STORAGE_OBJ.getValue(), ","); 
       };
       
       this.isPostIdInStorage = function(id) {
                  //faster version of previous code which splits string to array and searches by looping over it
                  return OPTS.DOMINIK_TOOLS.string.checkLikeInArray(OPTS.STORAGE_OBJ.getValue(), id, ",");
       };
            
       this.savePostIdToStorage = function(id) {
                  if (!FACEBOOK_TOOLS.isPostIdInStorage(id)) {
                    var ids = OPTS.DOMINIK_TOOLS.string.toArray(OPTS.STORAGE_OBJ.getValue());
                    ids.push(id);
                    OPTS.STORAGE_OBJ.setValue(OPTS.DOMINIK_TOOLS.array.toString(ids));
                  }
            };
  
     this.setVar = function(name, value){
              OPTS.DOMINIK_TOOLS.globalVar.set(name, value);
       };
  
     this.getVar = function(name){
              return OPTS.DOMINIK_TOOLS.globalVar.get(name);
      };
       
      
     this.appendHidePostLinkCSS = function(){
           $('head').append('<style>.' + OPTS.hidePostLinkCSSClass + ' { ' + OPTS.hidePostsLinksCSSRules + '} </style>'); 
      };
      
            
        
      /**
       * function puts post to hidden and removes it's div from the document 
       */
      this.savePostToHiddenAndRemoveByDivId = function(postDivId){
              if(!postDivId){
                   console.log("postDivId is empty");
                   return;
              }
              var facebookPostId = FACEBOOK_TOOLS.getFacebookPostIdByDivId(postDivId);
              FACEBOOK_TOOLS.savePostIdToStorage(facebookPostId);
              FACEBOOK_TOOLS.removePostDivFromHTML(postDivId);
              FACEBOOK_TOOLS.setVar('currentPostsInStorage', FACEBOOK_TOOLS.getVar('currentPostsInStorage')+1);
      };
      
      this.getHideAndSavePostLink = function(){
                var INFO_ABSOLUTE_DIV = OPTS.INFO_ABSOLUTE_DIV;
                var linkObject = $('<a class="' + OPTS.hidePostLinkCSSClass + '" href="javascript:void(0);">Hide&Save</a>')
                                    .click(function () {
                                   INFO_ABSOLUTE_DIV.hide();
                                   var postDivId = $(this).parent().attr('id');
                                   FACEBOOK_TOOLS.savePostToHiddenAndRemoveByDivId( postDivId );
                                   }).hover(function(){
                                        var info = "Hide post and save to hidden <br />so after page reload they'll be atomatically hidden.";
                                            info += '<br />You\'ve now added ';
                                            info += FACEBOOK_TOOLS.getVar('currentPostsInStorage'); 
                                            info += ' / '; 
                                            info += FACEBOOK_TOOLS.getVar('maxPostsInStorage'); 
                                            info += 'posts<br />(storage size is limited to 5 MB)';
                                        INFO_ABSOLUTE_DIV.showNextToObject(this, info);
                                     }, function(){
                                        INFO_ABSOLUTE_DIV.hide();
                                     });
                 return linkObject;
      };
      
      this.getHidePostLink = function(){
                var INFO_ABSOLUTE_DIV = OPTS.INFO_ABSOLUTE_DIV;
                var linkObject = $('<a class="' + OPTS.hidePostLinkCSSClass + '" href="javascript:void(0);">Hide</a>')
                                    .click(function () {
                                   INFO_ABSOLUTE_DIV.hide();
                                   var postDivId = $(this).parent().attr('id');
                                   FACEBOOK_TOOLS.removePostDivFromHTML(postDivId);
                                   }).hover(function(){
                                        var info = "Click this to just hide the post without saving to hidden.";
                                            info += "It will be visible again if you reload the page";
                                        INFO_ABSOLUTE_DIV.showNextToObject(this, info);
                                     }, function(){
                                        INFO_ABSOLUTE_DIV.hide();
                                     });
                 return linkObject;
      };
      
      /**
            *   Escapes colon in facebook post id, jQuery doesn't tolarate colons in id's
            */
      this.getjQueryPostIdByDivId = function(postDivId){
                return '[id="' + postDivId.replace(new RegExp(":", 'g'),"\\:") + '"]';
      };
      
      this.removePostDivFromHTML = function(postObjOrPostId){
          if(typeof postObjOrPostId == "string"){
              postObjOrPostId = FACEBOOK_TOOLS.getjQueryPostIdByDivId(postObjOrPostId);
          }
          
          if($(postObjOrPostId).size() < 1){
              console.log("There is no post with id: " + postObjOrPostId);
              return;
          }
          $(postObjOrPostId).unbind().remove();
      };
      
      this.getClearHiddenLink = function(){
        var INFO_ABSOLUTE_DIV = OPTS.INFO_ABSOLUTE_DIV;
            var linkObject = $('<a class="' + OPTS.hidePostLinkCSSClass + '" href="javascript:void(0);">Clear-Hidden</a>')
                    .click(function(){
                      if(confirm("You're sure you want to remove all the hidden posts?")){
                       FACEBOOK_TOOLS.removePosts();
                       INFO_ABSOLUTE_DIV.hide();
                       if(confirm("Do you want to refresh the page to show previously hidden posts?")){
                          location.reload();
                       }  
                       }
                    }).hover(function(){
                             var info = 'By clicking this, you will clear hidden posts, and refresh the page';
                             INFO_ABSOLUTE_DIV.showNextToObject(this, info);
                          }, function(){
                             INFO_ABSOLUTE_DIV.hide();
                      });
            return linkObject;
      };
        
        this.checkIfThisIsFacebookPostDiv = function(obj){
             return $(obj).is(OPTS.postCSS);
        };
      
      this.appendFunctionalLinksToPosts = function(selectorOrObjects){
                      
                    $(selectorOrObjects).each(function () {
                        var t = $(this);
                        if(!FACEBOOK_TOOLS.checkIfThisIsFacebookPostDiv(t)){
                          return true;
                        }
                        //console.log(t.attr("id") + "\n");
                        if (t.prop(OPTS.hidePostLinkCSSClass)) {
                          return true;
                        }
                       var divId = t.attr('id');
                       if(typeof divId == "undefined"){
                         //console.log("PROBLEM WITH OBJECT : ");
                         //console.log(t);
                         return true;
                       }
                        var facebookPostId = FACEBOOK_TOOLS.getFacebookPostIdByDivId(divId);
                        if (FACEBOOK_TOOLS.isPostIdInStorage(facebookPostId)) {
                          //console.log("I removed: " + divId);
                          FACEBOOK_TOOLS.removePostDivFromHTML(t);
                          return true;
                        }
                        t.prop(OPTS.hidePostLinkCSSClass, true)
                        .prepend('<br style="clear:both;" />')
                        .prepend( FACEBOOK_TOOLS.getHidePostsOnPage() )
                        .prepend( FACEBOOK_TOOLS.getHidePostsToDateLink() )
                        .prepend( FACEBOOK_TOOLS.getClearHiddenLink() )
                        .prepend( FACEBOOK_TOOLS.getHideAndSavePostLink() )
                        .prepend( FACEBOOK_TOOLS.getHidePostLink() );
                         //console.log("Added links to: " + divId);
                      });
                        
      };
      
      /**
       * Returns first found post id size and treat it as average post id size. 
       */
      this.getAveragePostIdSize = function(){
          var divId = $(OPTS.postCSS).eq(0).attr("id");
          if(typeof divId == "undefined"){
              var e = "getAveragePostIdSize(): Post wasn't loaded on time, getting facebook div id size as 22 chars";
              console.log(e);
              return 22;
          }
          var postId = FACEBOOK_TOOLS.getFacebookPostIdByDivId(divId);
          return postId.length;  
      };
      
      this.prepareGlobalVars = function(){  
            FACEBOOK_TOOLS.setVar('averagePostIdSize', FACEBOOK_TOOLS.getAveragePostIdSize()); //MAX 20 chars is a post id
            FACEBOOK_TOOLS.setVar('maxPostsInStorage', parseInt(5000000 / FACEBOOK_TOOLS.getVar('averagePostIdSize')) );  //5MB is storage object size in modern browsers           
            FACEBOOK_TOOLS.setVar('currentPostsInStorage', parseInt(FACEBOOK_TOOLS.getPostsIdsArrayLength()));
      };
      
      this.intervalFunction = function(selectorOrObjects){
        FACEBOOK_TOOLS.appendFunctionalLinksToPosts(selectorOrObjects);
      };
           
      this.initStorage = function(){
          OPTS.STORAGE_OBJ.reInit();
        };
        
        
        ///////////////////////// HIDING CUSTOM POSTS ///////////////////////////////////
        ///////////////////////// HIDING CUSTOM POSTS ///////////////////////////////////
        ///////////////////////// HIDING CUSTOM POSTS ///////////////////////////////////
        ///////////////////////// HIDING CUSTOM POSTS ///////////////////////////////////
        
        this.getHidePostsOnPage = function(){
            var INFO_ABSOLUTE_DIV = OPTS.INFO_ABSOLUTE_DIV;
            var linkObject = $('<a class="' + OPTS.hidePostLinkCSSClass + '" href="javascript:void(0);">Hide-Visible</a>')
                    .click(function(){
                                     INFO_ABSOLUTE_DIV.hide();
                                                     $(FACEBOOK_TOOLS.getOPTS().postCSS).each(function(){
                                                            FACEBOOK_TOOLS.savePostToHiddenAndRemoveByDivId( $(this).attr('id') );
                                                     });
                    }).hover(function(){
                             var info = 'By clicking this, you will hide all posts that are currently visible on page';
                             INFO_ABSOLUTE_DIV.showNextToObject(this, info);
                          }, function(){
                             INFO_ABSOLUTE_DIV.hide();
                      });
            return linkObject;
      };
        
        
         this.getHidePostsToDateLink = function(){
                            var INFO_ABSOLUTE_DIV = OPTS.INFO_ABSOLUTE_DIV;
              if(typeof FACEBOOK_TOOLS.__DATE_PICK_ABSOLUTE_DIV == "undefined"){
                 var DATE_PICK_ABSOLUTE_DIV = new InfoAbsoluteDivClass();
                 FACEBOOK_TOOLS.__DATE_PICK_ABSOLUTE_DIV = DATE_PICK_ABSOLUTE_DIV;
                 DATE_PICK_ABSOLUTE_DIV.appendToDocument();
              } else {
                  var DATE_PICK_ABSOLUTE_DIV = FACEBOOK_TOOLS.__DATE_PICK_ABSOLUTE_DIV;
              }
              var linkObject = $('<a class="' + OPTS.hidePostLinkCSSClass + '" href="javascript:void(0);">Hide-To-Date</a>')
                                  .click(function () {
                                                                        
                                     INFO_ABSOLUTE_DIV.hide();
                                     var hidePostsButtonId = DATE_PICK_ABSOLUTE_DIV.getId() +'_hidePosts';
                                     var hideAndSavePostsButtonId = DATE_PICK_ABSOLUTE_DIV.getId() +'_hideAndSavePosts'; 
                                     var dateFieldId = DATE_PICK_ABSOLUTE_DIV.getId() +'_dateField';
                                     var postObject = $(this).parents(FACEBOOK_TOOLS.getOPTS().postCSS).eq(0);
                                     var postDDMMYYYY = FACEBOOK_TOOLS.getPostDDMMYYYY(postObject);
                                                                        
                                     var info = '<div class="datePickAbsoluteDivInfo"> Put date in format DD-MM-YYYY, to which all post newer should be hidden <br />';
                                         info += 'NOTE: that it may take time if you give some old date,<br />because all dynamically added posts (while scrolling down) will be hiding.<br />';
                                         info += 'NOTE: "Just hide newer posts!" will just hide posts,<br />"Hide&Save newer posts!" will hide and save posts to hidden (they won\'t show after page reload)<br />';
                                         info += 'Date: <input type="text" value="'+postDDMMYYYY+'" id="'+dateFieldId+'"size="10" /> <br />';
                                         info += '<input type="button" value="Hide&Save newer posts!" id="'+hideAndSavePostsButtonId+'" />&nbsp;&nbsp;&nbsp;&nbsp;';
                                         info += '<input type="button" value="Just hide newer posts!" id="'+hidePostsButtonId+'" />&nbsp;&nbsp;&nbsp;&nbsp;';
                                         info += '<input type="button" value="Cancel" onclick="jQuery(this).parent().parent().hide()" />';
                                                                             info += '</div>';
                                     DATE_PICK_ABSOLUTE_DIV.showNextToObject(this, info);
                                     $(".datePickAbsoluteDivInfo").css({ fontSize:"13px"});
                                     
                                     // Hide&Save post button action
                                     $("#" + hideAndSavePostsButtonId).click(function(){
                                                                               var DDMMYYYY = $("#" + dateFieldId).val();
                                                                               if(!DDMMYYYY.match(/\d{2}-\d{2}-\d{4}/)){
                                                                                     alert("Given date has wrong format you have to give something like 11-12-2015");
                                                                                     return;
                                                                               }
                                                                               if(confirm("You're sure you want to hide posts newer than: " + DDMMYYYY + "\n" + "All newer posts will be dynamically removed,\nuntil you refresh the page.")){       
                                                                                             FACEBOOK_TOOLS.hideAndSavePostsAndStartHidingObserver(DDMMYYYY);                                   
                                                                               }
                                                                               DATE_PICK_ABSOLUTE_DIV.hide();
                                     });
                                     // Just hide button action
                                      $("#" + hidePostsButtonId).click(function(){
                                                                               var DDMMYYYY = $("#" + dateFieldId).val();
                                                                               if(!DDMMYYYY.match(/\d{2}-\d{2}-\d{4}/)){
                                                                                     alert("Given date has wrong format you have to give something like 11-12-2015");
                                                                                     return;
                                                                                 }
                                                                               if(confirm("You're sure you want to hide posts newer than: " + DDMMYYYY + "\n" + "All newer posts will be dynamically removed,\nuntil you refresh the page.")){       
                                                                                             FACEBOOK_TOOLS.hidePostsAndStartHidingObserver(DDMMYYYY);
                                                                                 }
                                                                                 DATE_PICK_ABSOLUTE_DIV.hide();
                                     });
                                                                     
                                 }).hover(function(){
                                      var info = 'Click this to show date picker menu, <br /> where you can hide posts newer than choosed date';
                                      INFO_ABSOLUTE_DIV.showNextToObject(this, info);
                                   }, function(){
                                      INFO_ABSOLUTE_DIV.hide();
                                   });
               return linkObject;
      };
        
       this.getPostUtime = function(postObject){
           return $(postObject).find("abbr._5ptz").attr("data-utime");
       };
             /**
              * Gets formatted date from the postObject in format DD-MM-YYYY
                */
             this.getPostDDMMYYYY = function(postObject){
                   var postUtime = FACEBOOK_TOOLS.getPostUtime(postObject);
                   var DDMMYYYY = OPTS.DOMINIK_TOOLS.date.DDMMYYYYFromMicrotime(postUtime);
                   return DDMMYYYY;
             };
       
       /**
        * Hides facebook posts that are never than date DDMMYYYY
        * @param DDMMYYYY - date in format like 22-02-2015
        * @param postsObjects - array of DOM objects of posts divs
        * @param justHide - boolean, if TRUE posts are gonna be just hidden (removed from HTML), 
        *                   if FALSE posts are gonna be removed from HTML, and saved as hidden to storage object of the browser 
        */
       this.hideAndSavePostsNewerThanDateDDMMYYYY = function(DDMMYYYY, postsObjects, justHide){
           var time = (OPTS.DOMINIK_TOOLS.date.parseDateDDMMYYYY(DDMMYYYY).getTime())/1000;
           // here we must add 24h because we need to hide posts up to day after the date inclusive
           time += 3600*24;              
           if(!time){
               console.log("time is empty");
               return;
           }
           $(postsObjects).each(function(){
               var p = $(this);
               var postDivId = p.attr("id");
               var postTime = FACEBOOK_TOOLS.getPostUtime(p);
               if(postTime > time){
                   if(!justHide){
                    //save to hidden and remove from HTML 
                    FACEBOOK_TOOLS.savePostToHiddenAndRemoveByDivId(postDivId);
                   } else {
                    //only remove from HTML
                    FACEBOOK_TOOLS.removePostDivFromHTML(postDivId);
                   }
               }
           });
       };
       
       /**
        * Starts observer of incoming posts. All newly added will be observed and removed if they'll have microtime bigger that defined by the user
        * @param DDMMYYYY - date in format like 22-02-2015 
        * @param justHide - boolean, if TRUE posts are gonna be just hidden (removed from HTML), 
        *                   if FALSE posts are gonna be removed from HTML, and saved as hidden to storage object of the browser
        */
       this.__hideOrSavePostsAndStartHidingObserver = function(DDMMYYYY, justHide){
           //hide currently existent posts on the page
           FACEBOOK_TOOLS.hideAndSavePostsNewerThanDateDDMMYYYY(DDMMYYYY, $(OPTS.postCSS), justHide);
           //clear previously added nodes
           OPTS.MUTATION_OBSERVER.clearAddedNodesCallbacks();
           //init hiding observer
           OPTS.MUTATION_OBSERVER.addAddedNodesCallback(function(addedNodes){
               FACEBOOK_TOOLS.hideAndSavePostsNewerThanDateDDMMYYYY(DDMMYYYY, addedNodes, justHide);
           });
       };
       
       
       /**
        * Starts observer of incoming posts. All newly added will be observed and removed if they'll have microtime bigger that defined by the user
        * @param DDMMYYYY - date in format like 22-02-2015 
        */
       this.hideAndSavePostsAndStartHidingObserver = function(DDMMYYYY){
           FACEBOOK_TOOLS.__hideOrSavePostsAndStartHidingObserver(DDMMYYYY,false);
       };
       /**
        * Starts observer of incoming posts. All newly added will be observed and removed if they'll have microtime bigger that defined by the user
        * @param DDMMYYYY - date in format like 22-02-2015 
        */
       this.hidePostsAndStartHidingObserver = function(DDMMYYYY){
           FACEBOOK_TOOLS.__hideOrSavePostsAndStartHidingObserver(DDMMYYYY,true);
       };
       
       
        ///////////////////////// HIDING CUSTOM POSTS EMD ///////////////////////////////////
        ///////////////////////// HIDING CUSTOM POSTS EMD ///////////////////////////////////
        ///////////////////////// HIDING CUSTOM POSTS EMD ///////////////////////////////////
        ///////////////////////// HIDING CUSTOM POSTS EMD ///////////////////////////////////
        
        
        
        ///////////////////////////// INIT METHODS ////////////////////////////////////
        ///////////////////////////// INIT METHODS ////////////////////////////////////
        ///////////////////////////// INIT METHODS ////////////////////////////////////
        ///////////////////////////// INIT METHODS ////////////////////////////////////
        
        this.init = function(){
            FACEBOOK_TOOLS.appendHidePostLinkCSS();
            FACEBOOK_TOOLS.initStorage();
            OPTS.INFO_ABSOLUTE_DIV.appendToDocument();
            FACEBOOK_TOOLS.prepareGlobalVars();
            console.log("init(): OK");
        };
        
       this.startObserver = function(){
          //-------------- triggering interval function ----------------------------------
            // no need to pass filter here, because CSS_RULE is accurate
          FACEBOOK_TOOLS.intervalFunction(OPTS.postCSS);
          // observe added nodes and apply intervalFunction action
            OPTS.MUTATION_OBSERVER.observeAddedNodesIn(OPTS.groupPostsCSS, function(addedNodes){
                FACEBOOK_TOOLS.intervalFunction(addedNodes);
            });
             console.log("startObserver(): OK");
    };
       
       
      
      
    }//facebookTools
    
    
          
    function loadFacebookTools(){
        try {
            var FACEBOOK_TOOLS = new facebookTools(); //pass Storage object of the application
            //temporary globalize
            //-------------------------- INVOKE FUNCTIONS / SETUP GLOBALS ----------------------------------------------------
            FACEBOOK_TOOLS.init();
            var postsCheckTimeout = 20;
            var cnt = 0;
            
            var intervalID = setInterval(function(){
                if(++cnt >= postsCheckTimeout){
                      window.clearInterval(intervalID);
                }
                if(!FACEBOOK_TOOLS.checkIfPostsAreLoaded()){
                    console.log("No posts loaded yet!");
                    return;
                }
                try { FACEBOOK_TOOLS.startObserver(); } 
                catch(err){ console.log(err); }
                finally { window.clearInterval(intervalID); }
            }, 1000);

        } //try end
        catch (err1) {
            console.log(err1);
        }
    }     
    /////////////////////////////////////////////////////////////////////////////////////////////////////
    /////////////////////////////////////////////////////////////////////////////////////////////////////
    /////////////////////////////////////////////////////////////////////////////////////////////////////
    /////////////////////////////////////////////////////////////////////////////////////////////////////
    /////////////////////////////////////////////////////////////////////////////////////////////////////
    /////////////////////////////////////////////////////////////////////////////////////////////////////
   loadFacebookTools();
          
          // Overwrite pushState method of history object
          (function(history){
              var pushState = history.pushState;
              history.pushState = function(state) {
                  if (typeof history.onpushstate == "function") {
                      history.onpushstate({state: state});
                  }
                  // here we can add our own functionality
                     loadFacebookTools();
                  //
                  return pushState.apply(history, arguments);
              };
          })(window.history);
          //to browser history back/next buttons
          window.addEventListener('popstate', function() {
             loadFacebookTools();
          });
}); //jQuery
}


} //FacebookHidePostWhole

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