From 2f0d89c5cfb101bccf7bbe8be1b070ce2a4fee4c Mon Sep 17 00:00:00 2001
From: Elias Fleckenstein <eliasfleckenstein@web.de>
Date: Sat, 16 Jul 2022 23:07:41 +0200
Subject: [PATCH] Properly serialize special node id mappings

---
 deserialize.go | 20 ++++++++++++++------
 serialize.go   | 11 ++++++-----
 types.go       |  4 ----
 3 files changed, 20 insertions(+), 15 deletions(-)

diff --git a/deserialize.go b/deserialize.go
index e055348..78b9ea2 100644
--- a/deserialize.go
+++ b/deserialize.go
@@ -247,19 +247,27 @@ func Deserialize(r io.Reader, idNameMap map[string]mt.Content) *MapBlk {
 
 	for i := 0; i < 4096; i++ {
 		id := blk.Param0[i]
-		if isSpecial(id) {
-			continue
-		}
 
 		name, ok := nameIdMap[id]
 		if !ok {
 			panic(ErrInvalidNodeId{id})
 		}
 
-		blk.Param0[i], ok = idNameMap[name]
-		if !ok {
-			panic(ErrInvalidNodeName{name})
+		switch name {
+		case "unknown":
+			id = mt.Unknown
+		case "air":
+			id = mt.Air
+		case "ignore":
+			id = mt.Ignore
+		default:
+			id, ok = idNameMap[name]
+			if !ok {
+				panic(ErrInvalidNodeName{name})
+			}
 		}
+
+		blk.Param0[i] = id
 	}
 
 	return blk
diff --git a/serialize.go b/serialize.go
index 3cf601c..1d1ea42 100644
--- a/serialize.go
+++ b/serialize.go
@@ -158,13 +158,14 @@ func Serialize(blk *MapBlk, w io.Writer, nameIdMap map[mt.Content]string) {
 		panic(err)
 	}
 
-	var localNameIdMap = make(map[mt.Content]string)
+	var localNameIdMap = map[mt.Content]string{
+		mt.Unknown: "unknown",
+		mt.Air:     "air",
+		mt.Ignore:  "ignore",
+	}
+
 	for i := 0; i < 4096; i++ {
 		id := blk.Param0[i]
-		if isSpecial(id) {
-			continue
-		}
-
 		if _, ok := localNameIdMap[id]; ok {
 			continue
 		}
diff --git a/types.go b/types.go
index bd51350..5c923a3 100644
--- a/types.go
+++ b/types.go
@@ -51,7 +51,3 @@ type ErrInvalidNodeId struct {
 func (e ErrInvalidNodeId) Error() string {
 	return fmt.Sprintf("invalid node %v", e.Id)
 }
-
-func isSpecial(id mt.Content) bool {
-	return id >= 125 && id <= 127
-}
-- 
2.44.0