feat: adding metadata button

frontend/src/api/files.ts

@@ -188,6 +188,21 @@ export async function checksum(url: string, algo: ChecksumAlg) {
   return (await data.json()).checksums[algo];
 }
 
+export async function metadata(url: string) {
+  // Fetch metadata for a resource. Backend support is required for this to work.
+  const res = await resourceAction(`${url}?metadata=1`, "GET");
+  try {
+    return await res.json();
+  } catch (e) {
+    return null;
+  }
+}
+
+export async function updateMetadata(url: string, content: any) {
+  // Update metadata for a resource. Backend must support PATCH with action=metadata.
+  return resourceAction(`${url}?action=metadata`, "PATCH", JSON.stringify(content));
+}
+
 export function getDownloadURL(file: ResourceItem, inline: any) {
   const params = {
     ...(inline && { inline: "true" }),