feat: added avatar endpoint

pages/api/image/discord/avatars/[id].ts

@@ -0,0 +1,31 @@
+import { createReadStream } from 'fs'
+import { NextApiHandler, NextApiRequest, NextApiResponse } from 'next'
+import ResponseWrapper from '@utils/ResponseWrapper'
+import { DiscordEnpoints } from '@utils/Constants'
+import { get } from '@utils/Query'
+
+const Avatar: NextApiHandler = async(req: ApiRequest, res: NextApiResponse) => {
+	const splitted = req.query.id.split('.')
+	const ext= splitted[1]
+	const id = splitted[0]
+	if(splitted.length !== 2) return ResponseWrapper(res, { code: 400, message: '올바르지 않은 형식입니다.' })
+	if(!['webp', 'png', 'gif'].includes(ext)) return ResponseWrapper(res, { code: 400, message: '올바르지 않은 확장자입니다.' })
+
+	const user = await get.discord.user.load(id)
+	if(!user) return ResponseWrapper(res, { code: 400, message: '올바르지 않은 유저입니다.' })
+
+	const image = await get.images.user.load(DiscordEnpoints.CDN.user(id, user.avatar, { format: (ext as Ext) }))
+	res.setHeader('Content-Type', `image/${ext}`)
+	
+	image.pipe(res)
+}
+
+interface ApiRequest extends NextApiRequest {
+	query: {
+		id: string
+	}
+}
+
+type Ext = 'webp' | 'png' | 'gif'
+
+export default Avatar