reject invalid block placement

1 files changed, 21 insertions, 0 deletions

diff --git a/server/level.go b/server/level.go
index 17f8eb8..7b03aca 100644
--- a/server/level.go
+++ b/server/level.go
@@ -236,6 +236,27 @@ func (l *level) SetBlock(from phony.Actor, pos blockPos, block blockType) {
 	})
 }
 
+func (l *level) TrySetBlock(
+		from phony.Actor, pos blockPos, block blockType, auth authLevel,
+		reject func(realBlock blockType)) {
+	l.mapM.GetBlock(from, pos, func(curBlock blockType) {
+		if blockDefinitions[curBlock].AuthLevel > auth {
+			from.Act(nil, func() {reject(curBlock)})
+			return
+		}
+		def, ok := blockDefinitions[block]
+		if !ok && block > blockStoneBricks {
+			from.Act(nil, func() {reject(curBlock)})
+			return
+		}
+		if def.AuthLevel > auth {
+			from.Act(nil, func() {reject(curBlock)})
+			return
+		}
+		l.SetBlock(nil, pos, block)
+	})
+}
+
 func (l *level) OnAddPlayer(from *player, name string, pos entityPos) {
 	l.Act(from, func() {
 		l.load()