feat: impl fully indexed & searchable data stores

packages/core/database/persistentcachedmap.js

@@ -0,0 +1,53 @@
+import Storage from "./storage";
+import Indexer from "./indexer";
+
+export default class PersistentCachedMap {
+  /**
+   *
+   * @param {string} key
+   * @param {Storage} storage
+   */
+  constructor(key, storage) {
+    this.key = key;
+    this.indexer = new Indexer(storage, key);
+  }
+
+  async init() {
+    await this.indexer.init();
+    const data = await this.indexer.readMulti(this.indexer.indices);
+    this.map = new Map(data);
+  }
+
+  async set(key, value) {
+    this.map.set(key, value);
+    await this.indexer.write(key, value);
+    await this.indexer.index(key);
+  }
+
+  async delete(key) {
+    await this.indexer.remove(key);
+    await this.indexer.deindex(key);
+    return this.map.delete(key);
+  }
+
+  get(key) {
+    return this.map.get(key);
+  }
+
+  has(key) {
+    return this.map.has(key);
+  }
+
+  async clear() {
+    await this.indexer.clear();
+    this.map.clear();
+  }
+
+  values() {
+    return this.map.values();
+  }
+
+  forEach(callbackFn) {
+    return this.map.forEach(callbackFn);
+  }
+}