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src/image-processor.ts

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+import sharp from 'sharp';
+import { Readable } from 'node:stream';
+
+export type IImage = {
+    data: Buffer;
+    ext: string | null;
+    type: string;
+};
+
+export type IImageStream = {
+    data: Readable;
+    ext: string | null;
+    type: string;
+};
+
+export type IImageStreamable = IImage | IImageStream;
+
+export const webpDefault: sharp.WebpOptions = {
+    quality: 85,
+    alphaQuality: 95,
+    lossless: false,
+    nearLossless: false,
+    smartSubsample: true,
+    mixed: true,
+};
+
+export function convertToWebpStream(path: string, width: number, height: number, options: sharp.WebpOptions = webpDefault): IImageStream {
+    return convertSharpToWebpStream(sharp(path), width, height, options);
+}
+
+export function convertSharpToWebpStream(sharp: sharp.Sharp, width: number, height: number, options: sharp.WebpOptions = webpDefault): IImageStream {
+    const data = sharp
+        .resize(width, height, {
+            fit: 'inside',
+            withoutEnlargement: true,
+        })
+        .rotate()
+        .webp(options)
+
+    return {
+        data,
+        ext: 'webp',
+        type: 'image/webp',
+    };
+}