import { Request } from "express";
import { WebDAVClient } from "webdav";
import { DIRS } from "./server";


export async function statOne(fpath: string, client: WebDAVClient) {
	const parent = fpath.replace(/\/[^/]+$/, '') || '/',
		base = fpath.split('/').filter(Boolean).pop(),
		list = await client.getDirectoryContents(parent, { deep: false }),
		entry = Array.isArray(list) ? list.find((e: any) => e.basename === base) : undefined;

	if (!entry) throw `not found: ${fpath}`;
	return { etag: entry.etag as string, size: Number(entry.size), mime: entry.mime as string | undefined };
}

export const toRegExp = (spec: string): RegExp | null => {
	// slash-delimited form: /pattern/flags
	const m = spec.match(/^\/(.+)\/([a-z]*)$/i);
	try {
		if (m) {
			const [, source, flags] = m;
			return new RegExp(source, flags);
		}

		// raw pattern form: "pattern"
		return new RegExp(spec);
	} catch {
		return null;
	}
}

export function checkIfHasPerms(req: Request) {
	if (!req.body) {
		return false;
	}
	const { fpath, obj_type, deep, usecache } = req.body,
		o = { fpath, obj_type, deep, usecache };

	if (!fpath) return false;
	if (!DIRS) return o;
	if (fpath.includes('..')) return false;

	return DIRS.find(r => fpath.match(r)) ? o : false;
}