feat: implemented supporters

src/brain/manager.ts

@@ -0,0 +1,55 @@
+import { config } from "@/config";
+import { readFile, writeFile } from "fs/promises";
+
+export interface BrainItem {
+  brainId: string;
+  spaceName: string;
+  displayName: string;
+  baseSystemPrompt: string;
+}
+export type BrainDB = Record<string, BrainItem>;
+
+export class BrainDBManager {
+  private get db() {
+    return readFile(config.braindbPath, { encoding: "utf-8" }).then(
+      (content) => {
+        return JSON.parse(content) as BrainDB;
+      },
+    );
+  }
+
+  private async writeDb(db: BrainDB) {
+    await writeFile(config.braindbPath, JSON.stringify(db), {
+      encoding: "utf-8",
+    });
+  }
+
+  async loadBrain(brainId: string): Promise<BrainItem | undefined> {
+    const brainOrNot = (await this.db)[brainId];
+    return brainOrNot;
+  }
+
+  async saveBrain(brainId: string, brain: BrainItem) {
+    const db = await this.db;
+    db[brainId] = brain;
+    await this.writeDb(db);
+  }
+
+  async listBrain() {
+    return Object.entries(await this.db).map(
+      ([_, { brainId, displayName }]) => ({ brainId, displayName }),
+    );
+  }
+
+  async deleteBrain(brainId: string) {
+    const db = await this.db;
+    delete db[brainId];
+    await this.writeDb(db);
+  }
+
+  async isBrainAvailable(brainId: string) {
+    return brainId in (await this.db);
+  }
+}
+
+export const brainManager = new BrainDBManager();