Check if a listing is still active (#184)

* check if a listing is still active

* upgrade dependencies

lib/utils.js

@@ -1,5 +1,6 @@
 import { dirname } from 'node:path';
-import { fileURLToPath } from 'node:url';
+import path from 'node:path';
+import { fileURLToPath, pathToFileURL } from 'node:url';
 import { readFile } from 'fs/promises';
 import { createHash } from 'crypto';
 import { DEFAULT_CONFIG } from './defaultConfig.js';
@@ -11,6 +12,26 @@ const RE_GT = />/g;
 const RE_WEBP = /\/format\/webp/gi;
 const RE_EXT = /\.(jpe?g|png|gif)(\?.*)?$/i;
 const HTTPS_PREFIX = 'https://';
+const providersDirectoryPath = `${getDirName()}/provider`;
+
+/**
+ * Lazily load all provider modules from the provider directory.
+ * Caches the resolved array to avoid re-importing on subsequent calls.
+ *
+ * @returns {Promise<any[]>} A list of loaded provider modules.
+ */
+let cachedProvidersPromise = null;
+
+export function getProviders() {
+  if (!cachedProvidersPromise) {
+    /** @type {string[]} */
+    const providerFileNames = fs.readdirSync(providersDirectoryPath).filter((fileName) => fileName.endsWith('.js'));
+    cachedProvidersPromise = Promise.all(
+      providerFileNames.map((fileName) => import(pathToFileURL(path.join(providersDirectoryPath, fileName)).href)),
+    );
+  }
+  return cachedProvidersPromise;
+}
 
 /**
  * Safely stringify a value to JSON for storage.
@@ -21,7 +42,7 @@ const HTTPS_PREFIX = 'https://';
  * @param {T} v - Any JSON-serializable value.
  * @returns {string|null} JSON string or null.
  */
-export const toJson = (v) => (v == null ? null : JSON.stringify(v));
+const toJson = (v) => (v == null ? null : JSON.stringify(v));
 
 /**
  * Safely parse JSON text coming from storage.
@@ -33,7 +54,7 @@ export const toJson = (v) => (v == null ? null : JSON.stringify(v));
  * @param {T} fallback - Value to return when txt is null/invalid.
  * @returns {T} Parsed value or fallback.
  */
-export const fromJson = (txt, fallback) => {
+const fromJson = (txt, fallback) => {
   if (txt == null) return fallback;
   try {
     return JSON.parse(txt);
@@ -213,23 +234,40 @@ async function getPackageVersion() {
   return 'N/A';
 }
 
+/**
+ * Sleep helper
+ * @param {number} ms milliseconds to wait
+ * @returns {Promise<void>}
+ */
+function sleep(ms) {
+  return new Promise((resolve) => setTimeout(resolve, ms));
+}
+
+/**
+ * returns a random into between start and end
+ * @param a start int
+ * @param b max int
+ * @returns {*}
+ */
+function randomBetween(a, b) {
+  return Math.floor(Math.random() * (b - a + 1)) + a;
+}
+
+// Call refreshConfig() from the application entrypoint during startup to populate config.
 await refreshConfig();
 
-export { isOneOf };
-export { normalizeImageUrl };
-export { inDevMode };
-export { nullOrEmpty };
-export { duringWorkingHoursOrNotSet };
-export { getDirName };
-export { config };
-export { buildHash };
-export { getPackageVersion };
-export default {
+export {
   isOneOf,
+  normalizeImageUrl,
+  inDevMode,
   nullOrEmpty,
   duringWorkingHoursOrNotSet,
   getDirName,
+  sleep,
+  randomBetween,
   config,
+  buildHash,
+  getPackageVersion,
   toJson,
   fromJson,
 };