Uploads to same folder

common/path.test.ts

@@ -0,0 +1,11 @@
+import { assertEquals } from "../test_deps.ts";
+import { folderName, resolve } from "./path.ts";
+
+Deno.test("Path functions", () => {
+  assertEquals(folderName(""), "");
+  assertEquals(folderName("page"), "");
+  assertEquals(folderName("folder/page"), "folder");
+
+  assertEquals(resolve("", "page"), "page");
+  assertEquals(resolve("folder", "page"), "folder/page");
+});

common/path.ts

@@ -0,0 +1,23 @@
+export function folderName(path: string) {
+  return path.split("/").slice(0, -1).join("/");
+}
+
+export function resolve(...paths: string[]) {
+  const parts = paths.reduce((acc, path) => {
+    return acc.concat(path.split("/"));
+  }, [] as string[]);
+  const resolvedParts = [];
+  for (const part of parts) {
+    if (part === "..") {
+      resolvedParts.pop();
+    } else if (part !== ".") {
+      resolvedParts.push(part);
+    }
+  }
+  const result = resolvedParts.join("/");
+  if (result[0] === "/") {
+    return result.substring(1);
+  } else {
+    return result;
+  }
+}