Google Experiment Client

api.js

(function () {
    var d, f = this, k = function (a, c, b) {
        a = a.split(".");
        b = b || f;
        a[0] in b || !b.execScript || b.execScript("var " + a[0]);
        for (var e; a.length && (e = a.shift());)a.length || void 0 === c ? b = b[e] ? b[e] : b[e] = {} : b[e] = c
    }, l = Date.now || function () {
            return +new Date
        };
    var p = function (a) {
        this.D = a
    }, r = /\s*;\s*/;
    d = p.prototype;
    d.isEnabled = function () {
        return navigator.cookieEnabled
    };
    d.aa = function (a) {
        return !/[;=\s]/.test(a)
    };
    d.ba = function (a) {
        return !/[;\r\n]/.test(a)
    };
    d.set = function (a, c, b, e, g, h) {
        if (!this.aa(a))throw Error('Invalid cookie name "' + a + '"');
        if (!this.ba(c))throw Error('Invalid cookie value "' + c + '"');
        void 0 !== b || (b = -1);
        g = g ? ";domain=" + g : "";
        e = e ? ";path=" + e : "";
        h = h ? ";secure" : "";
        b = 0 > b ? "" : 0 == b ? ";expires=" + (new Date(1970, 1, 1)).toUTCString() : ";expires=" + (new Date(l() + 1E3 * b)).toUTCString();
        this.ha(a + "=" + c + g + e + b + h)
    };
    d.V = function () {
        return this.H().keys
    };
    d.Y = function () {
        return this.H().values
    };
    d.ha = function (a) {
        this.D.cookie = a
    };
    d.W = function () {
        return (this.D.cookie || "").split(r)
    };
    d.H = function () {
        for (var a = this.W(), c = [], b = [], e, g, h = 0; g = a[h]; h++)e = g.indexOf("="), -1 == e ? (c.push(""), b.push(g)) : (c.push(g.substring(0, e)), b.push(g.substring(e + 1)));
        return {keys: c, values: b}
    };
    var u = {}, v = function (a, c, b) {
        this.b = a;
        this.J = c;
        this.C = b;
        this.u = Math.floor((new Date).getTime() / 1E3);
        this.m = 8035200;
        this.i = void 0
    };
    v.prototype.ka = function () {
        return this.b + "$" + this.J + ":" + this.C
    };
    v.prototype.la = function () {
        var a = this.b + "$" + this.J + ":" + this.u + ":" + this.m;
        "string" == typeof this.i && (a = a.concat(":", this.i));
        return a
    };
    v.prototype.ja = function (a, c, b) {
        this.u = a;
        this.m = c;
        this.i = b
    };
    v.prototype.$ = function () {
        return (new Date).getTime() > (new Date(1E3 * (this.u + this.m))).getTime()
    };
    var y = function (a) {
        var c = {}, b = new p(document);
        if (!b.isEnabled())return c;
        var e = b.V(), b = b.Y();
        if (null == e || null == b)return c;
        for (var g = 0; g < e.length; g++)if ("__utmx" == e[g])for (var h = x(b[g], a), n = 0; n < h.length; n++) {
            var m = /([^$]+)\$([^:]+):(.*)/.exec(h[n]);
            null !== m && 4 == m.length && (m = new v(m[1], m[2], m[3]), c[m.b] = m)
        }
        g = {};
        for (h = 0; h < e.length; h++)if ("__utmxx" == e[h])for (n = x(b[h], a), m = 0; m < n.length; m++) {
            var q = /([^$]+)\$([^:]+):([^:]+):([^:]+):?(.*)/.exec(n[m]);
            if (null !== q && 5 <= q.length) {
                var w = q[1], t = c[w];
                "undefined" != typeof t && (t.ja(parseInt(q[3], 10), parseInt(q[4], 10), 6 == q.length ? q[5] : void 0), t.$() || (g[w] = t))
            }
        }
        return g
    }, x = function (a, c) {
        var b = a.split(".");
        return "string" == typeof c && 0 < b.length && b[0] != c ? [] : b.slice(1)
    };
    var z = function (a, c, b, e, g) {
        this.b = g || z.DEFAULT_ID;
        this.a = a;
        this.g = c;
        this.h = b;
        this.f = e;
        this.L = false
    };
    z.experiments_ = {
        "Q4SqthzWT2Wshz64bgMU5w": {
            "api_version": "V1",
            "method": "experiments.get",
            "data": {
                "kind": "cx/api#experiment",
                "id": "Q4SqthzWT2Wshz64bgMU5w",
                "self_link": "/cx/api/V1/experiments/Q4SqthzWT2Wshz64bgMU5w",
                "participation": 1,
                "items": [{
                    "kind": "cx/api#combination",
                    "id": "0",
                    "weight": 0.5,
                    "disabled": false
                }, {"kind": "cx/api#combination", "id": "1", "weight": 0.5, "disabled": false}]
            }
        }
    };
    z.DEFAULT_ID = "Q4SqthzWT2Wshz64bgMU5w";
    d = z.prototype;
    d.s = function (a) {
        if (!this.isGaBlockedByUser() && !this.getPreviewVariant()) {
            var c = new p(document);
            if (isValid(c.isEnabled(), "Unable to write cookies")) {
                var b = this.v(a), e = this.G(), g = y(e);
                g[this.b] = new v(this.b, "0", b);
                var b = e, h;
                for (h in g)var n = g[h], b = b.concat(".", n.ka()), e = e.concat(".", n.la());
                c.set("__utmx", b, this.f, this.g, this.j());
                c.set("__utmxx", e, this.f, this.g, this.j());
                -2 != a[0] && this.setGaData(a)
            }
        }
    };
    d.setGaData = function (a) {
        window.gaData || (window.gaData = {});
        window.gaData.expId = this.b;
        window.gaData.expVar = this.v(a)
    };
    d.j = function () {
        if ("string" == typeof this.a && "" != this.a && "none" != this.a && "auto" != this.a)return this.a;
        if ("none" == this.a)return null;
        var a = "" + document.domain;
        return 0 == a.indexOf("www.") ? a.substring(4) : a
    };
    d.G = function () {
        if (!this.h)return "1";
        var a = this.j();
        if (a) {
            var c = 1, b = 0, e;
            if (a)for (c = 0, e = a.length - 1; 0 <= e; e--)b = a.charCodeAt(e), c = (c << 6 & 268435455) + b + (b << 14), b = c & 266338304, c = 0 != b ? c ^ b >> 21 : c;
            a = String(c)
        } else a = "1";
        return a
    };
    d.v = function (a) {
        for (var c = 0; c < a.length; c++)if (-2 == a[c])return "";
        return a.join("-")
    };
    d.o = function (a) {
        if (0 == a.length)return -2;
        a = a.split("-");
        for (var c = [], b = 0; b < a.length; b++)c[b] = parseInt(a[b], 10);
        return c
    };
    var isValid = function (a, c) {
        !a && c && console && console.error && console.error(c);
        return a
    };
    d = z.prototype;
    d.isGaBlockedByUser = function () {
        var a = window._gaUserPrefs;
        return a && a.ioo && a.ioo()
    };
    d.loadExperiment = function () {
        if (!this.L) {
            var a = z.experiments_[this.b];
            this.L = true;
            if (!isValid("object" == typeof a, "Could not load experiment") || a.error)return false;
            this.c = a.data
        }
        return isValid("object" === typeof this.c, "Could not load experiment")
    };
    d.F = function () {
        if (this.isGaBlockedByUser())return -2;
        var a = this.getPreviewVariant();
        if (a)return a;
        a = y(this.G())[this.b];
        if (!a)return -1;
        a = this.o(a.C);
        -2 != a && this.setGaData(a);
        return a
    };
    d.getVariant = function () {
        if (this.isGaBlockedByUser() || !this.loadExperiment())return 0;
        var a = this.F();
        if (-2 == a || this.Z(a))return 0;
        if (-1 !== a)return a;
        if (!this.X())return this.s([-2]), 0;
        a = this.ca();
        this.s(a);
        return a
    };
    d.X = function (a) {
        return ("number" == typeof a ? a : Math.random()) < this.c.participation
    };
    d.ca = function (a) {
        isValid("undefined" === typeof _gaq, "Variations should be chosen before hit is sent to GA");
        a = "number" == typeof a ? a : Math.random();
        for (var c = 0; c < this.c.items.length; c++) {
            var b = this.c.items[c];
            if (a < b.weight)return this.o(b.id);
            a -= b.weight
        }
        isValid(false, "The combinations weights did not add up to 1");
        return [0]
    };
    d.U = function (a) {
        return this.loadExperiment() && isValid(0 <= a && a < this.c.items.length) ? this.c.items[a] : null
    };
    d.getPreviewVariant = function () {
        var a = /#utmxid=[-_a-zA-Z0-9]{22};utmxpreview=(\d{1,2});/.exec(window.location.hash);
        return a ? (a = this.U(parseInt(a[1], 10)), this.o(a.id)) : null
    };
    d.Z = function (a) {
        if ("number" === typeof a)return false;
        a = this.v(a);
        for (var c = 0; c < this.c.items.length; c++) {
            var b = this.c.items[c];
            if (b.id == a)return b.disabled
        }
        isValid(false, "Unable to locate combination with id " + a);
        return true
    };
    u = u || {};
    u.P = 0;
    k("cxApi.ORIGINAL_VARIATION", u.P, void 0);
    u.O = -1;
    k("cxApi.NO_CHOSEN_VARIATION", u.O, void 0);
    u.N = -2;
    k("cxApi.NOT_PARTICIPATING", u.N, void 0);
    u.A = "auto";
    k("cxApi.DEFAULT_DOMAIN", u.A, void 0);
    u.B = 48211200;
    k("cxApi.DEFAULT_EXPIRATION_SECONDS", u.B, void 0);
    u.w = "/";
    k("cxApi.DEFAULT_COOKIE_PATH", u.w, void 0);
    u.a = u.A;
    u.g = u.w;
    u.h = true;
    u.f = u.B;
    u.ea = function (a, c) {
        isValid("string" == typeof c || "undefined" == typeof c, "Invalid experiment id: " + c) && (new z(u.a, u.g, u.h, u.f, c)).s([a])
    };
    k("cxApi.setChosenVariation", u.ea, void 0);
    u.ia = function (a) {
        isValid("string" == typeof a, "Invalid domain name: " + a) && (u.a = a)
    };
    k("cxApi.setDomainName", u.ia, void 0);
    u.ga = function (a) {
        isValid("string" == typeof a, "Invalid cookie path: " + a) && (u.g = a)
    };
    k("cxApi.setCookiePath", u.ga, void 0);
    u.da = function (a) {
        isValid("boolean" == typeof a, "Invalid value for allowHash: " + typeof a) && (u.h = a)
    };
    k("cxApi.setAllowHash", u.da, void 0);
    u.fa = function (a) {
        isValid("number" == typeof a, "Invalid cookieExpirationSeconds: " + a) && (u.f = a)
    };
    k("cxApi.setCookieExpirationSeconds", u.fa, void 0);
    u.S = function (a) {
        isValid("string" == typeof a || "undefined" == typeof a, "Invalid experiment id: " + a);
        a = (new z(u.a, u.g, u.h, u.f, a)).getVariant();
        return "number" === typeof a ? a : a[0]
    };
    k("cxApi.chooseVariation", u.S, void 0);
    u.T = function (a) {
        isValid("string" == typeof a || "undefined" == typeof a, "Invalid experiment id: " + a);
        a = (new z(u.a, u.g, u.h, u.f, a)).F();
        return "number" === typeof a ? a : a[0]
    };
    k("cxApi.getChosenVariation", u.T, void 0);
})();