Add TTL Cache to common package

Signed-off-by: Frank Hinek <[email protected]>

packages/common/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@web5/common",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "type": "module",
   "main": "./dist/cjs/index.js",
   "module": "./dist/esm/index.js",
@@ -68,6 +68,7 @@
     "node": ">=18.0.0"
   },
   "dependencies": {
+    "@isaacs/ttlcache": "1.4.1",
     "level": "8.0.0",
     "multiformats": "11.0.2",
     "readable-stream": "4.4.2"

packages/common/src/cache.ts

@@ -0,0 +1,2 @@
+import TTLCache from '@isaacs/ttlcache';
+export { TTLCache as TtlCache };

packages/common/src/index.ts

@@ -1,5 +1,6 @@
 export type * from './types.js';
 
+export * from './cache.js';
 export * from './convert.js';
 export * from './multicodec.js';
 export * from './object.js';

packages/common/tests/cache.spec.ts

@@ -0,0 +1,28 @@
+import { expect } from 'chai';
+
+import { TtlCache } from '../src/cache.js';
+
+describe('TTLCache', function () {
+  it('should store and retrieve string values', function () {
+    const cache = new TtlCache({ max: 10000, ttl: 1000 });
+    cache.set('key1', 'value1');
+
+    expect(cache.has('key1')).to.be.true;
+    expect(cache.get('key1')).to.equal('value1');
+
+    expect(cache.has('key1')).to.be.true;
+    expect(cache.get('key1')).to.equal('value1');
+  });
+
+  it('should store and retrieve object values', function () {
+    const cache = new TtlCache({ max: 10000, ttl: 1000 });
+    const value = { prop: 'value' };
+    cache.set('key2', value);
+
+    expect(cache.has('key2')).to.be.true;
+    expect(cache.get('key2')).to.deep.equal(value);
+
+    expect(cache.has('key2')).to.be.true;
+    expect(cache.get('key2')).to.deep.equal(value);
+  });
+});