initial commit

2026-09-10 00:29:49 +00:00 · 2023-09-10 20:38:49 -05:00
commit 7a1366303f
16 changed files with 3268 additions and 0 deletions
@@ -0,0 +1,86 @@
+const { PSN_PACKET_HEADER_PARSER } = require('../common');
+
+const Parser = require('binary-parser').Parser;
+
+const PSN_INFO_SYSTEM_NAME_PARSER = new Parser()
+  .uint16le('id')
+  .uint16le('data_len', {
+    formatter: (item) => {
+      const binary = item.toString(2).padStart(16, '0');
+      return Number.parseInt(binary.substring(1), 2);
+    },
+  })
+  .seek(-2)
+  .uint16le('has_subchunks', {
+    formatter: (item) => {
+      const binary = item.toString(2).padStart(16, '0');
+      return binary.charAt(0) === '1';
+    },
+  })
+  .string('system_name', { length: 'data_len' });
+
+const PSN_INFO_TRACKER_NAME_PARSER = new Parser()
+  .uint16le('id')
+  .uint16le('data_len', {
+    formatter: (item) => {
+      const binary = item.toString(2).padStart(16, '0');
+      return Number.parseInt(binary.substring(1), 2);
+    },
+  })
+  .seek(-2)
+  .uint16le('has_subchunks', {
+    formatter: (item) => {
+      const binary = item.toString(2).padStart(16, '0');
+      return binary.charAt(0) === '1';
+    },
+  })
+  .string('tracker_name', { length: 'data_len' });
+
+const PSN_INFO_TRACKER_PARSER = new Parser()
+  .uint16le('id')
+  .uint16le('data_len', {
+    formatter: (item) => {
+      const binary = item.toString(2).padStart(16, '0');
+      return Number.parseInt(binary.substring(1), 2);
+    },
+  })
+  .seek(-2)
+  .uint16le('has_subchunks', {
+    formatter: (item) => {
+      const binary = item.toString(2).padStart(16, '0');
+      return binary.charAt(0) === '1';
+    },
+  })
+  .nest('tracker_name', {
+    type: PSN_INFO_TRACKER_NAME_PARSER,
+  });
+
+const PSN_INFO_TRACKER_LIST_PARSER = new Parser()
+  .uint16le('id')
+  .uint16le('data_len', {
+    formatter: (item) => {
+      const binary = item.toString(2).padStart(16, '0');
+      return Number.parseInt(binary.substring(1), 2);
+    },
+  })
+  .seek(-2)
+  .uint16le('has_subchunks', {
+    formatter: (item) => {
+      const binary = item.toString(2).padStart(16, '0');
+      return binary.charAt(0) === '1';
+    },
+  })
+  .array('trackers', { type: PSN_INFO_TRACKER_PARSER, lengthInBytes: 'data_len' });
+
+const PSN_INFO_CHUNK_DATA_PARSER = new Parser()
+  .nest('packet_header', { type: PSN_PACKET_HEADER_PARSER })
+  .nest('system_name', { type: PSN_INFO_SYSTEM_NAME_PARSER })
+  .nest('tracker_list', { type: PSN_INFO_TRACKER_LIST_PARSER });
+
+module.exports = {
+  PSN_INFO_SYSTEM_NAME_PARSER,
+  PSN_INFO_TRACKER_NAME_PARSER,
+  PSN_INFO_TRACKER_PARSER,
+  PSN_INFO_TRACKER_LIST_PARSER,
+  PSN_INFO_CHUNK_DATA_PARSER,
+};