feat: impl fully indexed & searchable data stores

packages/core/database/persistentmap.js

@@ -0,0 +1,48 @@
+import Indexer from "./indexer";
+import Storage from "./storage";
+
+export default class PersistentMap {
+  /**
+   *
+   * @param {string} key
+   * @param {Storage} storage
+   */
+  constructor(key, storage) {
+    this.key = key;
+    this.indexer = new Indexer(storage, key);
+  }
+
+  init() {
+    return this.indexer.init();
+  }
+
+  async 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);
+  }
+
+  get(key) {
+    return this.indexer.read(key);
+  }
+
+  has(key) {
+    return this.indexer.exists(key);
+  }
+
+  async clear() {
+    await this.indexer.clear();
+  }
+
+  async values() {
+    const data = await this.indexer.readMulti(this.indexer.indices);
+    return data.reduce((total, current) => {
+      total.push(current[1]);
+      return total;
+    }, []);
+  }
+}