Add TypeScript integrations package

ts/core/classes.configstore.ts

@@ -0,0 +1,42 @@
+import * as plugins from '../plugins.js';
+import type { IConfigStore } from './types.js';
+
+export class JsonFileConfigStore implements IConfigStore {
+  constructor(private readonly filePath: string) {}
+
+  public async get<TValue>(keyArg: string): Promise<TValue | undefined> {
+    const data = await this.readFile();
+    return data[keyArg] as TValue | undefined;
+  }
+
+  public async set<TValue>(keyArg: string, valueArg: TValue): Promise<void> {
+    const data = await this.readFile();
+    data[keyArg] = valueArg;
+    await this.writeFile(data);
+  }
+
+  public async delete(keyArg: string): Promise<void> {
+    const data = await this.readFile();
+    delete data[keyArg];
+    await this.writeFile(data);
+  }
+
+  public async list(prefixArg = ''): Promise<string[]> {
+    const data = await this.readFile();
+    return Object.keys(data).filter((keyArg) => keyArg.startsWith(prefixArg));
+  }
+
+  private async readFile(): Promise<Record<string, unknown>> {
+    try {
+      const fileString = await plugins.fs.readFile(this.filePath, 'utf8');
+      return JSON.parse(fileString) as Record<string, unknown>;
+    } catch (error) {
+      return {};
+    }
+  }
+
+  private async writeFile(dataArg: Record<string, unknown>): Promise<void> {
+    await plugins.fs.mkdir(plugins.path.dirname(this.filePath), { recursive: true });
+    await plugins.fs.writeFile(this.filePath, `${JSON.stringify(dataArg, null, 2)}\n`);
+  }
+}