api/store: implement has() method

api/src/store/base-store.js

@@ -13,6 +13,15 @@ export class Store {
         this.id = name;
     }
 
+    async _has(_key) { throw "needs implementation" }
+    has(key) {
+        if (typeof key !== 'string') {
+            key = key.toString();
+        }
+
+        return this._has(key);
+    }
+
     async _get(_key) { throw "needs implementation" }
     async get(key) {
         if (typeof key !== 'string') {

api/src/store/memory-store.js

@@ -14,6 +14,10 @@ export default class MemoryStore extends Store {
         super(name);
     }
 
+    async _has(key) {
+        return this.#store.has(key);
+    }
+
     async _get(key) {
         const val = this.#store.get(key);
 

api/src/store/redis-store.js

@@ -17,6 +17,12 @@ export default class RedisStore extends Store {
         return this.id + '_' + key;
     }
 
+    async _has(key) {
+        await this.#connected;
+
+        return this.#client.hExists(key);
+    }
+
     async _get(key) {
         await this.#connected;