convert to typescript

2026-08-20 06:29:12 +00:00 · 2023-09-14 22:43:25 -05:00
parent 4c19f5f7b9
commit f21bef263d
64 changed files with 1109 additions and 605 deletions
@@ -0,0 +1,38 @@
+import { Constants } from '../../constants';
+import chunk, { Chunk } from '../chunk';
+import packetHeaderChunk, { PacketHeaderChunk } from '../packet-header-chunk';
+import dataTrackerListChunk, { DataTrackerListChunk } from './data-tracker-list-chunk';
+
+export interface DataPacketChunk extends Chunk {
+  packet_header: PacketHeaderChunk;
+  tracker_list: DataTrackerListChunk;
+}
+
+function decodeDataPacketChunk(dataPacketChunk: DataPacketChunk) {
+  if (dataPacketChunk.has_subchunks && dataPacketChunk.chunk_data && dataPacketChunk.data_len) {
+    let offset = 0;
+    while (offset < dataPacketChunk.data_len) {
+      const chunkId = dataPacketChunk.chunk_data.readUInt16LE(offset);
+      switch (chunkId) {
+        case 0x0000:
+          dataPacketChunk.packet_header = packetHeaderChunk(dataPacketChunk.chunk_data.subarray(offset));
+          offset += Constants.CHUNK_HEADER_SIZE;
+          if (dataPacketChunk.packet_header?.data_len) {
+            offset += dataPacketChunk.packet_header.data_len;
+          }
+          break;
+        case 0x0001:
+          dataPacketChunk.tracker_list = dataTrackerListChunk(dataPacketChunk.chunk_data.subarray(offset));
+          offset += Constants.CHUNK_HEADER_SIZE;
+          if (dataPacketChunk.tracker_list.data_len) {
+            offset += dataPacketChunk.tracker_list.data_len;
+          }
+          break;
+        default:
+          break;
+      }
+    }
+  }
+}
+
+export default (buffer: Buffer): DataPacketChunk => chunk(buffer, decodeDataPacketChunk) as DataPacketChunk;