Initial commit

server/src/services/thumbnailer.js

@@ -0,0 +1,32 @@
+import sharp from "sharp";
+
+class ThumbnailerService {
+    async fromStream(source, resizeOptions, fit) {
+        const imageBuffer = await this.#streamToBuffer(source);
+        // const dimensions = this.getDimensions(imageBuffer, percentage, {width, height});
+        return sharp(imageBuffer)
+            .resize({
+                ...resizeOptions,
+                fit: fit || 'contain'
+            })
+            .withMetadata()
+            .png()
+            .toBuffer();
+    }
+
+    #streamToBuffer(stream) {
+        return new Promise((resolve, reject) => {
+            const buffers = [];
+            stream.on("data", function (data) {
+                buffers.push(data);
+            });
+
+            stream.on("end", function () {
+                resolve(Buffer.concat(buffers));
+            })
+        })
+    }
+}
+
+const instance = new ThumbnailerService();
+export {instance as thumbnailer};