feat: add SQLite database module with play history and bot instances

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/data/database.test.ts

@@ -0,0 +1,97 @@
+import { describe, it, expect, beforeEach, afterEach } from "vitest";
+import { createDatabase, type BotDatabase, type BotInstance } from "./database.js";
+
+describe("database", () => {
+  let botDb: BotDatabase;
+
+  beforeEach(() => {
+    botDb = createDatabase(":memory:");
+  });
+
+  afterEach(() => {
+    botDb.close();
+  });
+
+  it("creates tables on init", () => {
+    const tables = botDb.db
+      .prepare(
+        "SELECT name FROM sqlite_master WHERE type='table' ORDER BY name"
+      )
+      .all() as Array<{ name: string }>;
+    const names = tables.map((t) => t.name);
+    expect(names).toContain("play_history");
+    expect(names).toContain("bot_instances");
+  });
+
+  it("records and retrieves play history", () => {
+    botDb.addPlayHistory({
+      botId: "bot1",
+      songId: "song1",
+      songName: "Test Song",
+      artist: "Test Artist",
+      album: "Test Album",
+      platform: "netease",
+      coverUrl: "https://example.com/cover.jpg",
+      playedAt: new Date().toISOString(),
+    });
+
+    botDb.addPlayHistory({
+      botId: "bot1",
+      songId: "song2",
+      songName: "Another Song",
+      artist: "Another Artist",
+      album: "Another Album",
+      platform: "qq",
+      coverUrl: "https://example.com/cover2.jpg",
+      playedAt: new Date().toISOString(),
+    });
+
+    const history = botDb.getPlayHistory("bot1", 10);
+    expect(history).toHaveLength(2);
+    expect(history[0].songName).toBe("Another Song");
+    expect(history[1].songName).toBe("Test Song");
+  });
+
+  it("saves and loads bot instances", () => {
+    const instance: BotInstance = {
+      id: "bot1",
+      name: "Music Bot",
+      serverAddress: "localhost",
+      serverPort: 9987,
+      nickname: "MusicBot",
+      defaultChannel: "Music",
+      channelPassword: "",
+      autoStart: true,
+    };
+
+    botDb.saveBotInstance(instance);
+    const instances = botDb.getBotInstances();
+    expect(instances).toHaveLength(1);
+    expect(instances[0]).toEqual(instance);
+    expect(instances[0].autoStart).toBe(true);
+
+    // Test upsert
+    botDb.saveBotInstance({ ...instance, nickname: "UpdatedBot", autoStart: false });
+    const updated = botDb.getBotInstances();
+    expect(updated).toHaveLength(1);
+    expect(updated[0].nickname).toBe("UpdatedBot");
+    expect(updated[0].autoStart).toBe(false);
+  });
+
+  it("deletes bot instance", () => {
+    botDb.saveBotInstance({
+      id: "bot1",
+      name: "Music Bot",
+      serverAddress: "localhost",
+      serverPort: 9987,
+      nickname: "MusicBot",
+      defaultChannel: "Music",
+      channelPassword: "",
+      autoStart: false,
+    });
+
+    expect(botDb.deleteBotInstance("bot1")).toBe(true);
+    expect(botDb.getBotInstances()).toHaveLength(0);
+    expect(botDb.deleteBotInstance("nonexistent")).toBe(false);
+  });
+});