mutually_exclusive.js

 /* Place this code in Project JS.
 * This code randomly selects either one experiment marked with an [ME], one experiment from each group denominated with [Group_A] where A is any character the user wishes to use. The code is evaluated before url targeting and audiencing.
 *
 * The way it works is:
 * - Let's say we have 3 groups with 3 experiments in each group, 3 experiments marked with an [ME], and 5 experiments not marked with a [Group_X] or an [ME].
 * [Group_A_ME] Exp 1, [Group_A_ME] Exp 2, [Group_A] Exp 3, [Group_A] holdout
 * [Group_B] Exp 4, [Group_B] Exp 5, [Group_B] Exp 6, [Group_B] holdout
 * [Group_C] Exp 7, [Group_C_ME] Exp 8, [Group_C] Exp 9, [Group_C] holdout
 * [ME] Exp 10, [ME] Exp 11, [ME] Exp 12, [ME] holdout
 *
 * - First evaluate whether none of the experiments will be picked. There is a 5% chance for this condition and its called a global holdout as designated by the '[ME] holdout'
 * - Next a random number picks whether the group or ME flow phase is picked
 * - If the group flow is picked, a flow within each group picks either one group ME experiment marked [Group_A_ME] or all group experiments not marked with an ME [Group_A]
 * - There is a 10% chance within the group flow to pick a holdout experiment if it exists
 * - If the ME flow is picked, one experiment marked with an [ME] is selected
 *
 * This way, a customer will get 100% clean data (guaranteed no pollution from other running experiments) without any effort from the client except including [EXCLUSIVE] in the name, when the customer wants to, and no exclusiveness when the customer doesn't want to.
 *
 * Downside: with more exclusive experiments, the experiments will get less and less (chances for) visitors.
 *
 * You can use the ?optimizely_exclusive_force=EXPERIMENTID to force yourself into a variation (and auto-exclude yourself from other relevant experiments).
 */
function getParameterByName(e){e=e.replace(/[\[]/,"\\[").replace(/[\]]/,"\\]");var o=new RegExp("[\\?&]"+e+"=([^&#]*)"),n=o.exec(location.search);return null===n?"":decodeURIComponent(n[1].replace(/\+/g," "))}function getRunningExperiments(){var e=[];for(var o in DATA.experiments){var n=DATA.experiments[o];n.enabled&&-1===window.location.search.indexOf("x"+o)&&e.push(o)}return window.running=e,e}function getRunningExclusiveExperiments(e){var o=[];for(var n in DATA.experiments){var r=DATA.experiments[n];if(r.enabled&&-1===window.location.search.indexOf("x"+n)){var t=DATA.experiments[n].name.toLowerCase().indexOf("[Group_".toLowerCase()),i=DATA.experiments[n].name.toLowerCase().indexOf("[ME]".toLowerCase());t>-1&&e||i>-1&&e?o.push(n):-1!=t||-1!=i||e||o.push(n)}}return e?window.running_exclusive=o:window.running_non_exclusive=o,o}function expArrayToJSON(e,o,n){var r={};if(n)for(var t in e)t!=o&&e[t].name.toLowerCase().indexOf("[EXCLUSIVE]".toLowerCase())>-1&&(r[t]="0");else for(var t in e)t!=o&&(r[t]="0");return r}function log(e){window.log_arr=window.log_arr||[],window.log_arr.push(e)}function groupFlow(e,o){for(var n in o.groups){var r=o.groups[n];if(r.holdout!==!1&&Math.floor(100*Math.random())>90)e.push(r.holdout);else{var t=Math.floor(Math.random()*(r.exps.length+r.me.length));t<r.exps.length?e=e.concat(r.exps):e.push(r.me[t-r.exps.length])}}return e}function pickExperiment(e){var o=location.hostname.split(".");o="."+o[o.length-2]+"."+o[o.length-1];var n={allExp:getRunningExclusiveExperiments(!0)},r={allExp:getRunningExclusiveExperiments(!1)},t=[];if(n=sortGroups(n),n.allExp.indexOf(e)>-1||r.allExp.indexOf(e)>-1)t.push(e);else if(void 0!==n.me&&void 0!==n.me.holdout&&Math.floor(100*Math.random())>95)t.push(n.me.holdout);else if(void 0===n.groups)t.push(n.me.exps[Math.floor(Math.random()*n.me.exps.length)]);else if(void 0===n.me)t=groupFlow(t,n);else{var i=n.allExp.length-n.me.exps.length;Math.floor(Math.random()*n.allExp.length)<i?t=groupFlow(t,n):t.push(n.me.exps[Math.floor(Math.random()*n.me.exps.length)])}return t=t.concat(r.allExp),docCookies.setItem("optimizelyExp",t,1728e8,"/",o),t}function sortGroups(e){for(var o=0;o<e.allExp.length;o++){var n=DATA.experiments[e.allExp[o]],r=n.name.toLowerCase();r.indexOf("group_")>-1?(void 0===e.groups&&(e.groups={}),void 0===e.groups[r.charAt(7)]&&(e.groups[r.charAt(7)]={holdout:!1,me:[],exps:[]}),r.indexOf("holdout")>-1?e.groups[r.charAt(7)].holdout=e.allExp[o]:r.indexOf("me")>-1?e.groups[r.charAt(7)].me.push(e.allExp[o]):e.groups[r.charAt(7)].exps.push(e.allExp[o])):(void 0===e.me&&(e.me={holdout:!1,exps:[]}),r.indexOf("holdout")>-1?e.me.holdout=e.allExp[o]:e.me.exps.push(e.allExp[o]))}return e}function updateBuckets(e){window.optimizely=window.optimizely||[],log("Mutual exclusion chose experiment "+e);for(var o in DATA.experiments)-1===e.indexOf(o)&&-1===window.location.search.indexOf("x"+o)?(DATA.experiments[o].enabled=!1,log("Disable experiment "+o)):console.log("Active - "+o+": "+DATA.experiments[o].name)}var docCookies={getItem:function(e){return decodeURIComponent(document.cookie.replace(new RegExp("(?:(?:^|.*;)\\s*"+encodeURIComponent(e).replace(/[\-\.\+\*]/g,"\\$&")+"\\s*\\=\\s*([^;]*).*$)|^.*$"),"$1"))||null},setItem:function(e,o,n,r,t,i){if(!e||/^(?:expires|max\-age|path|domain|secure)$/i.test(e))return!1;var p="";if(n)switch(n.constructor){case Number:p=1/0===n?"; expires=Fri, 31 Dec 9999 23:59:59 GMT":"; max-age="+n;break;case String:p="; expires="+n;break;case Date:p="; expires="+n.toUTCString()}return document.cookie=encodeURIComponent(e)+"="+encodeURIComponent(o)+p+(t?"; domain="+t:"")+(r?"; path="+r:"")+(i?"; secure":""),!0},removeItem:function(e,o,n){return e&&this.hasItem(e)?(document.cookie=encodeURIComponent(e)+"=; expires=Thu, 01 Jan 1970 00:00:00 GMT"+(n?"; domain="+n:"")+(o?"; path="+o:""),!0):!1},hasItem:function(e){return new RegExp("(?:^|;\\s*)"+encodeURIComponent(e).replace(/[\-\.\+\*]/g,"\\$&")+"\\s*\\=").test(document.cookie)},keys:function(){for(var e=document.cookie.replace(/((?:^|\s*;)[^\=]+)(?=;|$)|^\s*|\s*(?:\=[^;]*)?(?:\1|$)/g,"").split(/\s*(?:\=[^;]*)?;\s*/),o=0;o<e.length;o++)e[o]=decodeURIComponent(e[o]);return e}};if(window.print_log=function(){window.log_arr=window.log_arr||[],console.log(window.log_arr.join("\n "))},"undefined"!=typeof DATA){var force_exp=getParameterByName("optimizely_exclusive_force"),exp=docCookies.getItem("optimizelyExp");if(null!==exp&&exp.indexOf(",")>-1){exp=exp.split(",");for(var i=0;i<exp.length;i++)if(!DATA.experiments.hasOwnProperty(exp[i])||!DATA.experiments[exp[i]].enabled)var exp=pickExperiment(force_exp)}else if(!exp||!DATA.experiments.hasOwnProperty(exp)||!DATA.experiments[exp].enabled||""!=force_exp)var exp=pickExperiment(force_exp);window.opt_expid=exp,updateBuckets(exp)}