93 lines
3.8 KiB
JavaScript
93 lines
3.8 KiB
JavaScript
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"use strict";
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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const p_defer_1 = __importDefault(require("p-defer"));
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function mapAgeCleaner(map, property = 'maxAge') {
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let processingKey;
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let processingTimer;
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let processingDeferred;
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const cleanup = () => __awaiter(this, void 0, void 0, function* () {
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if (processingKey !== undefined) {
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// If we are already processing an item, we can safely exit
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return;
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}
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const setupTimer = (item) => __awaiter(this, void 0, void 0, function* () {
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processingDeferred = p_defer_1.default();
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const delay = item[1][property] - Date.now();
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if (delay <= 0) {
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// Remove the item immediately if the delay is equal to or below 0
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map.delete(item[0]);
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processingDeferred.resolve();
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return;
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}
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// Keep track of the current processed key
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processingKey = item[0];
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processingTimer = setTimeout(() => {
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// Remove the item when the timeout fires
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map.delete(item[0]);
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if (processingDeferred) {
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processingDeferred.resolve();
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}
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}, delay);
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// tslint:disable-next-line:strict-type-predicates
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if (typeof processingTimer.unref === 'function') {
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// Don't hold up the process from exiting
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processingTimer.unref();
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}
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return processingDeferred.promise;
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});
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try {
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for (const entry of map) {
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yield setupTimer(entry);
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}
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}
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catch (_a) {
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// Do nothing if an error occurs, this means the timer was cleaned up and we should stop processing
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}
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processingKey = undefined;
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});
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const reset = () => {
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processingKey = undefined;
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if (processingTimer !== undefined) {
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clearTimeout(processingTimer);
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processingTimer = undefined;
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}
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if (processingDeferred !== undefined) { // tslint:disable-line:early-exit
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processingDeferred.reject(undefined);
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processingDeferred = undefined;
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}
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};
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const originalSet = map.set.bind(map);
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map.set = (key, value) => {
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if (map.has(key)) {
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// If the key already exist, remove it so we can add it back at the end of the map.
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map.delete(key);
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}
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// Call the original `map.set`
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const result = originalSet(key, value);
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// If we are already processing a key and the key added is the current processed key, stop processing it
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if (processingKey && processingKey === key) {
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reset();
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}
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// Always run the cleanup method in case it wasn't started yet
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cleanup(); // tslint:disable-line:no-floating-promises
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return result;
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};
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cleanup(); // tslint:disable-line:no-floating-promises
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return map;
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}
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exports.default = mapAgeCleaner;
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// Add support for CJS
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module.exports = mapAgeCleaner;
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module.exports.default = mapAgeCleaner;
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