fix: add convertPeriodToSeconds utility function and refactor RateLimiter to use it

Author: yaroslav8765

adminforth/index.ts

@@ -6,7 +6,7 @@ import SQLiteConnector from './dataConnectors/sqlite.js';
 import CodeInjector from './modules/codeInjector.js';
 import ExpressServer from './servers/express.js';
 // import FastifyServer from './servers/fastify.js';
-import { ADMINFORTH_VERSION, listify, suggestIfTypo, RateLimiter, RAMLock, getClientIp, isProbablyUUIDColumn } from './modules/utils.js';
+import { ADMINFORTH_VERSION, listify, suggestIfTypo, RateLimiter, RAMLock, getClientIp, isProbablyUUIDColumn, convertPeriodToSeconds } from './modules/utils.js';
 import { 
   type AdminForthConfig, 
   type IAdminForth, 
@@ -48,7 +48,7 @@ export * from './types/adapters/index.js';
 export * from './modules/filtersTools.js';
 export { interpretResource };
 export { AdminForthPlugin };
-export { suggestIfTypo, RateLimiter, RAMLock, getClientIp };
+export { suggestIfTypo, RateLimiter, RAMLock, getClientIp, convertPeriodToSeconds };
 
 
 class AdminForth implements IAdminForth {

adminforth/modules/utils.ts

@@ -381,6 +381,20 @@ export function md5hash(str:string) {
   return crypto.createHash('md5').update(str).digest('hex');
 }
 
+export function convertPeriodToSeconds(period: string): number {
+    const periodChar = period.slice(-1);
+    const duration = parseInt(period.slice(0, -1));
+    if (periodChar === 's') {
+      return duration;
+    } else if (periodChar === 'm') {
+      return duration * 60;
+    } else if (periodChar === 'h') {
+      return duration * 60 * 60;
+    } else if (periodChar === 'd') {
+      return duration * 60 * 60 * 24;
+    }
+    throw new Error(`Invalid period: ${period}`);
+}
 export class RateLimiter {
   // constructor, accepts string like 10/10m, or 20/10s, or 30/1d
 
@@ -394,18 +408,7 @@ export class RateLimiter {
     }
 
 
-    const period = rate.slice(-1);
-    const duration = parseInt(rate.slice(0, -1));
-    if (period === 's') {
-      return duration;
-    } else if (period === 'm') {
-      return duration * 60;
-    } else if (period === 'h') {
-      return duration * 60 * 60;
-    } else if (period === 'd') {
-      return duration * 60 * 60 * 24;
-    }
-    throw new Error(`Invalid rate duration period: ${period}`);
+    return convertPeriodToSeconds(rate);
   }