From baf5e50016b4333754ecf0cdccd2b0a59f1cb1e8 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Tue, 22 Mar 2016 19:25:50 -0700
Subject: [PATCH] recursive worker packet parsing.

---
 lib/bcoin/workers.js | 133 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 131 insertions(+), 2 deletions(-)

diff --git a/lib/bcoin/workers.js b/lib/bcoin/workers.js
index 7e1cb926..704cd4b7 100644
--- a/lib/bcoin/workers.js
+++ b/lib/bcoin/workers.js
@@ -169,7 +169,7 @@ function createPacket(id, name, items) {
   return p.render();
 }
 
-function createBody(name, items) {
+function createBody_(name, items) {
   var p = new BufferWriter();
   var i, item;
 
@@ -231,7 +231,7 @@ function createBody(name, items) {
   return p.render();
 }
 
-function parseBody(data) {
+function parseBody_(data) {
   var p = new BufferReader(data, true);
   var name, count, i;
   var items = [];
@@ -288,6 +288,135 @@ function parseBody(data) {
   };
 }
 
+function createBody(name, items) {
+  var p = new BufferWriter();
+
+  if (name)
+    p.writeVarString(name, 'ascii');
+  else
+    p.writeUIntv(0);
+
+  frameItem(items, p);
+
+  p.writeU8(0x0a);
+
+  return p.render();
+}
+
+function frameItem(item, p) {
+  var i, keys;
+  switch (typeof item) {
+    case 'string':
+      p.writeU8(1);
+      p.writeVarString(item, 'utf8');
+      break;
+    case 'number':
+      p.writeU8(2);
+      p.write32(item);
+      break;
+    case 'boolean':
+      p.writeU8(3);
+      p.writeU8(item ? 1 : 0);
+      break;
+    case 'object':
+    case 'undefined':
+      if (item == null) {
+        p.writeU8(0);
+      } else {
+        if (item instanceof bcoin.block) {
+          p.writeU8(40);
+          p.writeVarBytes(item.render());
+        } else if (item instanceof bcoin.tx) {
+          p.writeU8(41);
+          p.writeVarBytes(item.toExtended(true));
+        } else if (item instanceof bcoin.coin) {
+          p.writeU8(42);
+          p.writeVarBytes(item.toExtended());
+        } else if (item instanceof bn) {
+          p.writeU8(43);
+          p.writeVarBytes(item.toBuffer());
+        } else if (Buffer.isBuffer(item)) {
+          p.writeU8(4);
+          p.writeVarBytes(item);
+        } else if (Array.isArray(item)) {
+          p.writeU8(5);
+          p.writeUIntv(item.length);
+          for (i = 0; i < item.length; i++)
+            frameItem(item[i], p);
+        } else {
+          keys = Object.keys(item);
+          p.writeU8(6);
+          p.writeUIntv(keys.length);
+          for (i = 0; i < keys.length; i++) {
+            p.writeVarString(keys[i], 'utf8');
+            frameItem(item[keys[i]], p);
+          }
+        }
+      }
+      break;
+    default:
+      assert(false, 'Bad type: ' + typeof item);
+  }
+}
+
+function parseBody(data) {
+  var p = new BufferReader(data, true);
+  var name, items;
+
+  p.start();
+
+  name = p.readVarString('ascii');
+  items = parseItem(p);
+
+  assert(p.readU8() === 0x0a);
+
+  p.end();
+
+  return {
+    name: name || null,
+    items: items
+  };
+}
+
+function parseItem(p) {
+  var i, count, items;
+
+  switch (p.readU8()) {
+    case 0:
+      return null;
+    case 1:
+      return p.readVarString('utf8');
+    case 2:
+      return p.read32();
+    case 3:
+      return p.readU8() === 1;
+    case 4:
+      return p.readVarBytes();
+    case 5:
+      items = [];
+      count = p.readUIntv();
+      for (i = 0; i < count; i++)
+        items.push(parseItem(p));
+      return items;
+    case 6:
+      count = p.readUIntv();
+      items = {};
+      for (i = 0; i < count; i++)
+        items[p.readVarString('utf8')] = parseItem(p);
+      return items;
+    case 40:
+      return bcoin.block.fromRaw(p.readVarBytes());
+    case 41:
+      return bcoin.tx.fromExtended(p.readVarBytes(), true);
+    case 42:
+      return bcoin.coin.fromExtended(p.readVarBytes());
+    case 43:
+      return new bn(p.readVarBytes());
+    default:
+      assert(false, 'Bad type.');
+  }
+}
+
 function parseHeader(data) {
   return {
     magic: utils.readU32(data, 0),