✅♻️🩹 backend: add company_id to editing_session_key (#525)

tdrive/backend/node/src/utils/uuid.ts

@@ -12,3 +12,35 @@ export function timeuuidToDate(time_str: string): number {
 
   return parseInt(time_string, 16);
 }
+
+/** Remove `-`s from a formatted UUID to get a hex a string */
+export function hexFromFormatted(uuid: string) {
+  const result = uuid.replace(/-+/g, "");
+  if (result.length !== 32)
+    throw new Error(`Invalid UUID (${JSON.stringify(uuid)}). Wrong number of digits`);
+  return result;
+}
+
+/** Add `-`s back in a hex string to make a formatted UUID */
+export function formattedFromHex(hex: string) {
+  const idMatch = hex.match(
+    /^([a-z0-f]{8})([a-z0-f]{4})([a-z0-f]{4})([a-z0-f]{4})([a-z0-f]{12})$/i,
+  );
+  if (!idMatch)
+    throw new Error(`Invalid UUID hex (${JSON.stringify(hex)}). Wrong number of digits`);
+  const [, ...parts] = idMatch;
+  return parts.join("-");
+}
+
+/** Convert a UUID formatted or hex string into a binary buffer */
+export function bufferFromUUIDString(uuidOrHex: string) {
+  return Buffer.from(hexFromFormatted(uuidOrHex), "hex");
+}
+
+/** In a buffer with concatenated UUIDs in binary, extract the `index`th and return as formatted UUID */
+export function formattedUUIDInBufferArray(buffer: Buffer, index: number) {
+  if (buffer.length < (index + 1) * 16)
+    throw new Error(`Cannot get UUID ${JSON.stringify(index)} because the buffer is too small`);
+  const slice = buffer.subarray(index * 16, (index + 1) * 16);
+  return formattedFromHex(slice.toString("hex").toLowerCase());
+}