refactor: migrate database layer to Prisma ORM

src/database/database.service.ts

@@ -1,59 +1,25 @@
-import { Injectable, OnModuleInit, OnModuleDestroy } from '@nestjs/common';
-import { ConfigService } from '@nestjs/config';
-import Database from 'better-sqlite3';
-import * as path from 'path';
-import * as fs from 'fs';
+import { Injectable, OnModuleInit, OnModuleDestroy } from "@nestjs/common";
+import { PrismaClient } from "@prisma/client";
 
 @Injectable()
 export class DatabaseService implements OnModuleInit, OnModuleDestroy {
-  private db: Database.Database;
-  private dbPath: string;
+  private prisma: PrismaClient;
 
-  constructor(private configService: ConfigService) {}
+  constructor() {
+    this.prisma = new PrismaClient({
+      log: ["query", "error", "warn"],
+    });
+  }
 
   onModuleInit() {
-    this.dbPath = this.configService.get<string>('DB_PATH', path.join(process.cwd(), 'data/database.sqlite'));
-    const dbDir = path.dirname(this.dbPath);
-    
-    if (!fs.existsSync(dbDir)) {
-      fs.mkdirSync(dbDir, { recursive: true });
-    }
-    
-    this.db = new Database(this.dbPath, { verbose: console.log });
+    this.prisma.$connect();
   }
 
   onModuleDestroy() {
-    this.db.close();
+    this.prisma.$disconnect();
   }
 
-  get<T = any>(sql: string, params: any[] = []): T | undefined {
-    try {
-      const stmt = this.db.prepare(sql);
-      return stmt.get(params) as T | undefined;
-    } catch (error) {
-      console.error('数据库查询错误:', error);
-      throw error;
-    }
-  }
-
-  all<T = any>(sql: string, params: any[] = []): T[] {
-    try {
-      const stmt = this.db.prepare(sql);
-      return stmt.all(params) as T[];
-    } catch (error) {
-      console.error('数据库查询错误:', error);
-      throw error;
-    }
-  }
-
-  run(sql: string, params: any[] = []): { id: number; changes: number } {
-    try {
-      const stmt = this.db.prepare(sql);
-      const result = stmt.run(params);
-      return { id: result.lastInsertRowid as number, changes: result.changes };
-    } catch (error) {
-      console.error('数据库操作错误:', error);
-      throw error;
-    }
+  getPrisma() {
+    return this.prisma;
   }
 }