@splitsoftware/splitio-commons/esm/trackers/impressionObserver/ImpressionObserver.js

Split JavaScript SDK common components

import { LRUCache } from '../../utils/LRUCache';
var ImpressionObserver = /** @class */ (function () {
    function ImpressionObserver(size, hasher) {
        this.cache = new LRUCache(size);
        this.hasher = hasher;
    }
    ImpressionObserver.prototype.testAndSet = function (impression) {
        var hash = this.hasher(impression);
        var previous = this.cache.get(hash);
        this.cache.set(hash, impression.time);
        return previous;
    };
    return ImpressionObserver;
}());
export { ImpressionObserver };