@drift-labs/common/lib/utils/pollingSequenceGuard.js

Common functions for Drift

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.PollingSequenceGuard = exports.LATE_POLLING_RESPONSE = void 0;
exports.LATE_POLLING_RESPONSE = Symbol('Late polling response');
/**
 * Utility class which makes sure that asyncronous responses get rejected when we expect them to return in the same sequence that we request them but they don't
 */
class PollingSequenceGuard {
    static async fetch(key, cb) {
        var _a, _b;
        const newCount = ((_a = this.pollingCounts.get(key)) !== null && _a !== void 0 ? _a : 0) + 1;
        const promise = await cb();
        const latestCount = (_b = this.pollingCounts.get(key)) !== null && _b !== void 0 ? _b : 0;
        if (latestCount > newCount) {
            return Promise.reject(exports.LATE_POLLING_RESPONSE);
        }
        this.pollingCounts.set(key, newCount);
        return promise;
    }
}
exports.PollingSequenceGuard = PollingSequenceGuard;
PollingSequenceGuard.pollingCounts = new Map();
PollingSequenceGuard.LATE_POLLING_RESPONSE = exports.LATE_POLLING_RESPONSE;
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