import RestResponse from "./RestResponse.ts";
import { Handler } from "./Router.ts";

export default function staticHandler(path: string): Handler {
    return {
        async handle(req) {
            try {
                const realPath = await Deno.realPath(`${path}/${req.url}`);
                const stream = await Deno.open(realPath, { read: true });
                const i = realPath.lastIndexOf('.');
                const res = new RestResponse().body(stream.readable);
                await stream.read(new Uint8Array(1));
                await stream.seek(0, Deno.SeekMode.Start);

                if (i >= 0) return res.contentType(realPath.substring(i + 1));
                else return res;
            }
            catch (e) {
                console.error(e);
                return undefined;
            }
        }
    };
}