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import { fileTypeFromStream } from "file-type";
import pump from "pump";
import Clone from "readable-stream-clone";
import fs from "fs";
import path from "path";
import sharp from "sharp";
import { pipeline } from "stream";
import { g, s, db } from "$lib/db";
import crypto from "crypto";
async function getSha256Hash(stream) {
return new Promise((resolve, reject) => {
const hash = crypto.createHash("sha256");
stream.pipe(hash);
let hashValue;
hash.on("data", data => {
hashValue = data.toString("hex");
});
hash.on("end", () => {
resolve(hashValue);
});
hash.on("error", reject);
});
}
export default async (req, res) => {
let {
params: { type }
} = req;
let width = type === "banner" ? 1920 : 240;
let data = await req.file();
let s1 = new Clone(data.file);
let s2 = new Clone(data.file);
let [format, ext] = (await fileTypeFromStream(s1)).mime.split("/");
if (format !== "image" && !["jpg", "jpeg", "png"].includes(ext))
throw new Error("unsupported file type");
let t = sharp()
.rotate()
.resize(width)
.webp();
let processedBuffer = await streamToBuffer(s2.pipe(t));
let hash = crypto
.createHash("sha256")
.update(processedBuffer)
.digest("hex");
let filePath = `/app/data/uploads/${hash}.webp`;
fs.writeFileSync(filePath, processedBuffer);
res.send({ hash });
};
function streamToBuffer(stream) {
return new Promise((resolve, reject) => {
const chunks = [];
stream.on("data", chunk => chunks.push(chunk));
stream.on("end", () => resolve(Buffer.concat(chunks)));
stream.on("error", reject);
});
}
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