1 files changed, 60 insertions, 0 deletions
diff --git a/src/cdn/util/S3Storage.ts b/src/cdn/util/S3Storage.ts
new file mode 100644
index 00000000..c4066817
--- /dev/null
+++ b/src/cdn/util/S3Storage.ts
@@ -0,0 +1,60 @@
+import { S3 } from "@aws-sdk/client-s3";
+import { Readable } from "stream";
+import { Storage } from "./Storage";
+
+const readableToBuffer = (readable: Readable): Promise<Buffer> =>
+	new Promise((resolve, reject) => {
+		const chunks: Buffer[] = [];
+		readable.on("data", (chunk) => chunks.push(chunk));
+		readable.on("error", reject);
+		readable.on("end", () => resolve(Buffer.concat(chunks)));
+	});
+
+export class S3Storage implements Storage {
+	public constructor(
+		private client: S3,
+		private bucket: string,
+		private basePath?: string
+	) {}
+
+	/**
+	 * Always return a string, to ensure consistency.
+	 */
+	get bucketBasePath() {
+		return this.basePath ?? "";
+	}
+
+	async set(path: string, data: Buffer): Promise<void> {
+		await this.client.putObject({
+			Bucket: this.bucket,
+			Key: `${this.bucketBasePath}${path}`,
+			Body: data,
+		});
+	}
+
+	async get(path: string): Promise<Buffer | null> {
+		try {
+			const s3Object = await this.client.getObject({
+				Bucket: this.bucket,
+				Key: `${this.bucketBasePath ?? ""}${path}`,
+			});
+
+			if (!s3Object.Body) return null;
+
+			const body = s3Object.Body;
+
+			return await readableToBuffer(<Readable>body);
+		} catch (err) {
+			console.error(`[CDN] Unable to get S3 object at path ${path}.`);
+			console.error(err);
+			return null;
+		}
+	}
+
+	async delete(path: string): Promise<void> {
+		await this.client.deleteObject({
+			Bucket: this.bucket,
+			Key: `${this.bucketBasePath}${path}`,
+		});
+	}
+}