add optionalNbt, use it directly in protocol.json in packets and for defining slot

package.json

@@ -44,7 +44,7 @@
     "babel-runtime": "^5.4.4",
     "buffer-equal": "0.0.1",
     "lodash.reduce": "^3.1.2",
-    "minecraft-data": "^0.13.0",
+    "minecraft-data": "^0.16.1",
     "node-uuid": "~1.4.1",
     "prismarine-nbt": "0.1.0",
     "protodef": "0.2.0",

src/datatypes/minecraft.js

@@ -5,8 +5,8 @@ var uuid = require('node-uuid');
 // TODO : remove type-specific, replace with generic containers and arrays.
 module.exports = {
   'UUID': [readUUID, writeUUID, 16],
-  'slot': [readSlot, writeSlot, sizeOfSlot],
   'nbt': [readNbt, writeNbt, sizeOfNbt],
+  'optionalNbt':[readOptionalNbt,writeOptionalNbt,sizeOfOptionalNbt],
   'restBuffer': [readRestBuffer, writeRestBuffer, sizeOfRestBuffer],
   'entityMetadataLoop': [readEntityMetadata, writeEntityMetadata, sizeOfEntityMetadata]
 };
@@ -23,67 +23,6 @@ function writeUUID(value, buffer, offset) {
   return offset + 16;
 }
 
-function readSlot(buffer, offset) {
-  var value = {};
-  var results = types.short[0](buffer, offset);
-  if(!results) return null;
-  value.blockId = results.value;
-
-  if(value.blockId === -1) {
-    return {
-      value: value,
-      size: 2,
-    };
-  }
-
-  var cursorEnd = offset + 6;
-  if(cursorEnd > buffer.length) return null;
-  value.itemCount = buffer.readInt8(offset + 2);
-  value.itemDamage = buffer.readInt16BE(offset + 3);
-  var nbtData = buffer.readInt8(offset + 5);
-  if(nbtData == 0) {
-    return {
-      value: value,
-      size: 6
-    }
-  }
-  var nbtData = readNbt(buffer, offset + 5);
-  value.nbtData = nbtData.value;
-  return {
-    value: value,
-    size: nbtData.size + 5
-  };
-}
-
-function writeSlot(value, buffer, offset) {
-  buffer.writeInt16BE(value.blockId, offset);
-  if(value.blockId === -1) return offset + 2;
-  buffer.writeInt8(value.itemCount, offset + 2);
-  buffer.writeInt16BE(value.itemDamage, offset + 3);
-  var nbtDataLen;
-  if(value.nbtData) {
-    var newbuf = nbt.writeUncompressed(value.nbtData);
-    newbuf.copy(buffer, offset + 5);
-    nbtDataLen = newbuf.length;
-  }
-  else {
-    buffer.writeInt8(0, offset + 5);
-    nbtDataLen = 1;
-  }
-  return offset + 5 + nbtDataLen;
-}
-
-function sizeOfSlot(value) {
-  if(value.blockId === -1)
-    return (2);
-  else if(!value.nbtData) {
-    return (6);
-  } else {
-    return (5 + sizeOfNbt(value.nbtData));
-  }
-}
-
-
 function readNbt(buffer, offset) {
   return nbt.proto.read(buffer,offset,"nbt");
 }
@@ -97,6 +36,25 @@ function sizeOfNbt(value) {
 }
 
 
+function readOptionalNbt(buffer, offset) {
+  if(buffer.readInt8(offset) == 0) return {size:1};
+  return nbt.proto.read(buffer,offset,"nbt");
+}
+
+function writeOptionalNbt(value, buffer, offset) {
+  if(value==undefined) {
+    buffer.writeInt8(0,offset);
+    return offset+1;
+  }
+  return nbt.proto.write(value,buffer,offset,"nbt");
+}
+
+function sizeOfOptionalNbt(value) {
+  if(value==undefined)
+    return 1;
+  return nbt.proto.sizeOf(value,"nbt");
+}
+
 function readRestBuffer(buffer, offset) {
   return {
     value: buffer.slice(offset),

test/packetTest.js

@@ -68,6 +68,30 @@ var values = {
       }
     }
   },
+  'nbt':{
+    type:"compound",
+    name: "test", value: {
+      test1: {type: "int", value: 4},
+      test2: {type: "long", value: [12, 42]},
+      test3: {type: "byteArray", value: [32]},
+      test4: {type: "string", value: "ohi"},
+      test5: {type: "list", value: {type: "int", value: [4]}},
+      test6: {type: "compound", value: {test: {type: "int", value: 4}}},
+      test7: {type: "intArray", value: [12, 42]}
+    }
+  },
+  'optionalNbt':{
+    type:"compound",
+    name: "test", value: {
+      test1: {type: "int", value: 4},
+      test2: {type: "long", value: [12, 42]},
+      test3: {type: "byteArray", value: [32]},
+      test4: {type: "string", value: "ohi"},
+      test5: {type: "list", value: {type: "int", value: [4]}},
+      test6: {type: "compound", value: {test: {type: "int", value: 4}}},
+      test7: {type: "intArray", value: [12, 42]}
+    }
+  },
   'long': [0, 1],
   'entityMetadata': [
     {key: 17, value: 0, type: 0}