convert to typescript

src/decoders/data/data-tracker-list-chunk.ts

@@ -0,0 +1,30 @@
+import { Constants } from '../../constants';
+import chunk, { Chunk } from '../chunk';
+import dataTrackerChunk, { DataTrackerChunk } from './data-tracker-chunk';
+
+export interface DataTrackerListChunk extends Chunk {
+  trackers: {
+    [key: number]: DataTrackerChunk;
+  };
+}
+
+function decodeDataTrackerListChunk(dataTrackerListChunk: DataTrackerListChunk) {
+  dataTrackerListChunk.trackers = {};
+
+  // TODO(jwetzell): add error handling
+  let offset = 0;
+  if (dataTrackerListChunk.chunk_data) {
+    while (offset < dataTrackerListChunk.chunk_data.length) {
+      const trackerChunk = dataTrackerChunk(dataTrackerListChunk.chunk_data.subarray(offset));
+      offset += Constants.CHUNK_HEADER_SIZE;
+      if (trackerChunk.data_len) {
+        offset += trackerChunk.data_len;
+      }
+      if (trackerChunk.id) {
+        dataTrackerListChunk.trackers[trackerChunk.id] = trackerChunk;
+      }
+    }
+  }
+}
+export default (buffer: Buffer): DataTrackerListChunk =>
+  chunk(buffer, decodeDataTrackerListChunk) as DataTrackerListChunk;