gistfile1.txt

  	NYTD = {};
		NYTD.EventTracker = (function () {
		    'use strict';
		    var etHost; 
		    var lastEventTime = 0;
		    var nextCallbackNum = 0;
		    var wtMetaExcludes = {
		        'wt.z_nyts': 1,
		        'wt.z_nytd': 1,
		        'wt.z_ref': 1,
		        'wt.z_rmid': 1
		    };

		    if (!NYTD.env || NYTD.env === "production") {
		      etHost = "et.nytimes.com";
		    } else if (NYTD.env === "staging") {
		      etHost = "et.stg.use1.nytimes.com";
		    } else {
		      etHost = "et.dev.use1.nytimes.com";   
		    }

		    var buildUrl = function (url, params) {
		        var key;
		        var qs = '';
		        for (key in params) if (params.hasOwnProperty(key)) {
		            qs += (qs ? '&' : '') + key + '=' + encodeURIComponent(params[key]);
		        }
		        if (qs.length > 0) {
		            return url + '?' + qs;
		        } else {
		            return url;
		        }
		    };

		    var copyObject = function (obj) {
		        var key;
		        var objCopy = {};
		        for (key in obj) if (obj.hasOwnProperty(key)) {
		            objCopy[key] = obj[key];
		        }
		        return objCopy;
		    };

		    var extractMetaTags = function (obj) {
		        var name, nameLower, content, i;
		        var tags = document.getElementsByTagName('meta');
		        obj = obj || {};
		        for (i = 0; i < tags.length; i += 1) {
		            name = tags[i].getAttribute('name');
		            content = tags[i].getAttribute('content');
		            if (typeof name === 'string' && typeof content === 'string') {
		                nameLower = name.toLowerCase();
		                if (nameLower.substr(0, 3) === 'wt.' && 
		                    !wtMetaExcludes[nameLower]) {
		                    obj[name] = content;
		                }
		            }
		        }
		        return obj;
		    };

		    return function () {
		        var trackNow, agentId;
		        var that = this;
		        var datumId = null;
		        var parentDatumId = null;
		        var firedFirstEvent = false;
		        var scripts = [];
		        var queue = [];
		        var newData = [];

		        if (this instanceof NYTD.EventTracker === false) {
		            return new NYTD.EventTracker();
		        }

		        trackNow = function (evt, options) {
		            var scriptElem, oldScriptElem;
		            var callbackNum = nextCallbackNum;

		            nextCallbackNum += 1;

		            NYTD.EventTracker['cb' + callbackNum] = function (result) {
		                var i;
		                delete NYTD.EventTracker['cb' + callbackNum];
		                if (result.status && result.status === 'OK') {
		                    if (!datumId && options.buffer) {
		                        datumId = result.datumId;
		                        for (i = 0; i < queue.length; i += 1) {
		                            trackNow(queue[i].evt, queue[i].options);
		                        }
		                    }
		                    if (!agentId) {
		                        agentId = result.agentId;
		                    }
		                    if (options.callback) {
		                        options.callback(null, result);
		                    }
		                } else {
		                    if (options.callback) {
		                        options.callback(new Error('Event tracking failed'), 
		                            result);
		                    }
		                }
		            };

		            evt = copyObject(evt);
		            if (!options.buffer) {
		                evt.instant = '1';
		            }
		            evt.callback = 'NYTD.EventTracker.cb' + callbackNum;
		            if (datumId && options.buffer) {
		                evt.datumId = datumId;
		            }

		            if (options.sendMeta) {
		                extractMetaTags(evt);
		            }

		            if (agentId) {
		                evt.agentId = agentId;
		            }
		            scriptElem = document.createElement('script');
		            scriptElem.src = buildUrl((document.location.protocol || 'http:') +
		                '//'+etHost+'/', evt);
		            document.body.appendChild(scriptElem);

		            scripts.push(scriptElem);
		            if (scripts.length > 5) {
		                oldScriptElem = scripts.shift();
		                document.body.removeChild(oldScriptElem);
		            }
		        };

		        this.track = function (evt, options) {
		            options = options || {};
		            if (!options.background) {
		                lastEventTime = (new Date()).valueOf();
		            }
		            
		            if(evt.subject !== 'page' && this.getParentDatumId() !== null) {
		                evt.parentDatumId = this.getParentDatumId();
		            }
		            
		            if(newData.length > 0) {
		                var newDataItem,
		                    key;
		                
		                for (var i = 0; i < newData.length; i++) {
		                    newDataItem = newData[i];
		                    for (key in newDataItem) if (newDataItem.hasOwnProperty(key)) {
		                        evt[key] = newDataItem[key];
		                    }
		                    newData = []; // empty the array out for future usage
		                }
		                
		            }
		            
		            if (!options.buffer) {
		                trackNow(evt, options);
		            } else if (datumId || !firedFirstEvent) {
		                firedFirstEvent = true;
		                trackNow(evt, options);
		            } else {
		                queue.push({
		                    evt: copyObject(evt),
		                    options: copyObject(options)
		                });
		            }
		        };
		        
		        this.updateData = function (oArg) {
		            if(oArg instanceof Array) {
		                newData = newData.concat(oArg)
		            } else if(typeof oArg === 'object') {
		                newData.push(oArg);   
		            }
		        };

		        this.hasTrackedEventRecently = function () {
		            return ((new Date()).valueOf() - lastEventTime) < 960000;
		        };

		        this.getDatumId = function () {
		            return datumId;
		        };
		        
		        this.getParentDatumId = function() {
		            if(parentDatumId === null && 
		                NYTD.pageEventTracker && NYTD.pageEventTracker.getDatumId() !== null) {
		                parentDatumId = NYTD.pageEventTracker.getDatumId();
		            }
		            return parentDatumId;
		        };
		        
		        this.pixelTrack = function (evt, qs) {
		            var imgsrc, validEvt, validQs;
		            validEvt = (function (e) {
		                var k;
		                if (typeof e !== 'object') {
		                    return false;
		                }
		                for (k in e) if (e.hasOwnProperty(k)) {
		                    return true;
		                }
		                return false;
		            }(evt));
		            validQs = (typeof qs === 'string' && qs !== '');
		            if (!validEvt && !validQs) {
		                return;
		            }
		            imgsrc = (document.location.protocol || 'http:') + '//' + etHost +
		                    '/pixel';
		            if (validEvt) {
		                imgsrc = buildUrl(imgsrc, evt);
		            }
		            if (validQs) {
		                imgsrc += ((imgsrc.indexOf('?') === -1 ? '?' : '&') + qs);
		            }
		            new Image().src = imgsrc;
		        };
		    };
		})();