refactor: Enhance type safety for database queries in delete and download routes

src/app/api/delete/route.ts

@@ -1,6 +1,15 @@
 import { NextResponse } from 'next/server';
 import pool from '@/lib/db';
 import bcrypt from 'bcrypt';
+import { RowDataPacket, ResultSetHeader } from 'mysql2/promise';
+
+interface FileData extends RowDataPacket {
+  token_hash: string;
+}
+
+interface FilePart extends RowDataPacket {
+  discord_message_id: string | null;
+}
 
 if (!process.env.DISCORD_BOT_TOKEN || !process.env.DISCORD_CHANNEL_ID) {
   throw new Error('Discord bot token or channel ID is not configured');
@@ -17,8 +26,8 @@ export async function POST(request: Request) {
     const connection = await pool.getConnection();
     try {
       // 1. Fetch file and validate token
-      const [fileRows]: any[] = await connection.query('SELECT * FROM files WHERE id = ? AND deleted = 0', [file_id]);
-      const file = fileRows[0];
+      const [fileRows]: [RowDataPacket[], unknown] = await connection.query('SELECT * FROM files WHERE id = ? AND deleted = 0', [file_id]);
+      const file = fileRows[0] as FileData;
 
       if (!file) {
         return NextResponse.json({ error: 'File not found' }, { status: 404 });
@@ -30,13 +39,13 @@ export async function POST(request: Request) {
       }
 
       // 2. Fetch all message IDs for the file parts
-      const [partsRows]: any[] = await connection.query(
+      const [partsRows]: [RowDataPacket[], unknown] = await connection.query(
         'SELECT discord_message_id FROM file_parts WHERE file_id = ?',
         [file_id]
       );
 
       // 3. Delete each message from Discord sequentially to avoid rate limits
-      for (const part of partsRows) {
+      for (const part of partsRows[0] as FilePart[]) {
         if (!part.discord_message_id) continue;
 
         const deleteUrl = `https://discord.com/api/v10/channels/${process.env.DISCORD_CHANNEL_ID}/messages/${part.discord_message_id}`;

src/app/api/download-part/[file_id]/[part_index]/route.ts

@@ -1,11 +1,16 @@
 import { NextResponse } from 'next/server';
 import pool from '@/lib/db';
+import { RowDataPacket } from 'mysql2/promise';
+
+interface FilePart extends RowDataPacket {
+  discord_message_id: string | null;
+}
 
 if (!process.env.DISCORD_BOT_TOKEN || !process.env.DISCORD_CHANNEL_ID) {
   throw new Error('Discord bot token or channel ID is not configured');
 }
 
-export async function GET(request: Request, context: any) {
+export async function GET(request: Request, { params }: { params: { file_id: string; part_index: string; } }) {
   try {
     const params = await context.params;
     const file_id = params.file_id as string;
@@ -19,11 +24,11 @@ export async function GET(request: Request, context: any) {
     const connection = await pool.getConnection();
     let part;
     try {
-      const [partsRows]: any[] = await connection.query(
+      const [partsRows]: [RowDataPacket[], unknown] = await connection.query(
         'SELECT discord_message_id FROM file_parts WHERE file_id = ? AND part_index = ?',
         [file_id, part_index]
       );
-      part = partsRows[0];
+      part = partsRows[0] as FilePart;
     } finally {
       connection.release();
     }