unleash-server
Version:
Unleash is an enterprise ready feature toggles service. It provides different strategies for handling feature toggles.
49 lines • 1.93 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const strategy_1 = require("./strategy");
const util_1 = __importDefault(require("./util"));
const helpers_1 = require("../helpers");
const STICKINESS = {
default: 'default',
random: 'random',
};
class FlexibleRolloutStrategy extends strategy_1.Strategy {
constructor(radnomGenerator) {
super('flexibleRollout');
this.randomGenerator = () => `${Math.round(Math.random() * 100) + 1}`;
if (radnomGenerator) {
this.randomGenerator = radnomGenerator;
}
}
resolveStickiness(stickiness, context) {
switch (stickiness) {
case STICKINESS.default:
return (context.userId ||
context.sessionId ||
this.randomGenerator());
case STICKINESS.random:
return this.randomGenerator();
default:
return (0, helpers_1.resolveContextValue)(context, stickiness);
}
}
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
isEnabled(parameters, context) {
const groupId = parameters.groupId ||
(context.featureToggle && String(context.featureToggle)) ||
'';
const percentage = Number(parameters.rollout);
const stickiness = parameters.stickiness || STICKINESS.default;
const stickinessId = this.resolveStickiness(stickiness, context);
if (!stickinessId) {
return false;
}
const normalizedUserId = (0, util_1.default)(stickinessId, groupId);
return percentage > 0 && normalizedUserId <= percentage;
}
}
exports.default = FlexibleRolloutStrategy;
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