1 files changed, 49 insertions, 2 deletions
diff --git a/server/block_def.go b/server/block_def.go
index 631a388..28ae0ef 100644
--- a/server/block_def.go
+++ b/server/block_def.go
@@ -66,6 +66,7 @@ type blockDef struct {
 	Opacity blockOpacity
 	FogDensity byte
 	FogColor [3]byte
+	AuthLevel authLevel
 	Variants map[any]blockType
 }
 
@@ -248,17 +249,63 @@ func getBlockDefPackets() iter.Seq[classic.Packet] {
 
 func getInventoryPackets(inventoryList []blockType) iter.Seq[classic.Packet] {
 	return func(yield func(classic.Packet) bool) {
+		var ok bool
 		for i := 0; i < 256; i++ { // clear inventory first
-			yield(&classic.InventoryOrder {
+			ok = yield(&classic.InventoryOrder {
 				Order: 0,
 				BlockId: byte(i),
 			})
 		}
 		for i, block := range inventoryList {
-			yield(&classic.InventoryOrder {
+			ok = yield(&classic.InventoryOrder {
 				Order: byte(i + 1),
 				BlockId: byte(block),
 			})
 		}
+		if !ok {
+			return
+		}
+	}
+}
+
+func getBlockPermissionPackets(auth authLevel) iter.Seq[classic.Packet] {
+	return func(yield func(classic.Packet) bool) {
+		for block, def := range blockDefinitions {
+			var packet classic.Packet
+			if auth < def.AuthLevel {
+				packet = &classic.SetBlockPermission {
+					BlockId: byte(block),
+					AllowPlacement: 0,
+					AllowDeletion: 0,
+				}
+			} else {
+				packet = &classic.SetBlockPermission {
+					BlockId: byte(block),
+					AllowPlacement: 1,
+					AllowDeletion: 1,
+				}
+			}
+			if !yield(packet) {
+				return
+			}
+		}
+		var placeLiquids byte
+		if auth >= defaultAuth {
+			placeLiquids = 1
+		}
+		var ok bool
+		ok = yield(&classic.SetBlockPermission {
+			BlockId: blockWater,
+			AllowPlacement: placeLiquids,
+			AllowDeletion: placeLiquids,
+		})
+		if !ok {
+			return
+		}
+		yield(&classic.SetBlockPermission {
+			BlockId: blockLava,
+			AllowPlacement: placeLiquids,
+			AllowDeletion: placeLiquids,
+		})
 	}
 }