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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | 533x 533x 533x 533x 533x 533x 533x 533x 533x | // Worker manager singleton to ensure only one Web Worker instance
type SessionWorkerListener = (type: string, data?: unknown) => void;
class SessionWorkerManager {
private static instance: SessionWorkerManager | null = null;
private worker: Worker | null = null;
private workerId: string | null = null;
private isMonitoring = false;
private listeners: Set<SessionWorkerListener> = new Set();
// eslint-disable-next-line @typescript-eslint/no-empty-function
private constructor() {}
static getInstance(): SessionWorkerManager {
Eif (!SessionWorkerManager.instance) {
SessionWorkerManager.instance = new SessionWorkerManager();
}
return SessionWorkerManager.instance;
}
initializeWorker(): boolean {
// If worker already exists, don't create a new one
if (this.worker) {
return true;
}
// Check if Web Workers are supported
if (typeof Worker === "undefined") {
console.warn("Web Workers not supported");
return false;
}
try {
this.workerId = Math.random().toString(36).substr(2, 9);
this.worker = new Worker("/session-worker.js");
this.worker.onmessage = (e) => {
const { type, data } = e.data;
if (type === "CHECK_SESSION") {
const sessionStartTime = localStorage.getItem("session_start_time");
const currentTime = Date.now();
if (this.worker) {
this.worker.postMessage({
type: "SESSION_STATUS",
data: { sessionStartTime, currentTime },
});
}
}
this.listeners.forEach((listener) => listener(type, data));
};
this.worker.onerror = (error) => {
console.error(
"Session worker failed, worker ID:",
this.workerId,
error,
);
this.listeners.forEach((listener) => listener("WORKER_ERROR", error));
};
return true;
} catch (error) {
console.error("Failed to create session worker:", error);
return false;
}
}
startMonitoring(): void {
if (!this.worker) {
if (!this.initializeWorker()) {
return;
}
}
if (!this.isMonitoring && this.worker) {
this.worker.postMessage({ type: "START_MONITORING" });
this.isMonitoring = true;
}
}
stopMonitoring(): void {
if (this.worker && this.isMonitoring) {
this.worker.postMessage({ type: "STOP_MONITORING" });
this.isMonitoring = false;
}
}
addListener(listener: SessionWorkerListener): () => void {
this.listeners.add(listener);
return () => {
this.listeners.delete(listener);
// If no more listeners, stop monitoring but keep worker alive
if (this.listeners.size === 0) {
this.stopMonitoring();
}
};
}
terminate(): void {
if (this.worker) {
this.worker.terminate();
this.worker = null;
this.workerId = null;
this.isMonitoring = false;
this.listeners.clear();
}
}
isActive(): boolean {
return this.worker !== null;
}
// Get current worker ID for debugging
getWorkerId(): string | null {
return this.workerId;
}
}
export const sessionWorkerManager = SessionWorkerManager.getInstance();
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