From 5130dafed153210d01388f36b440c6156ae127b8 Mon Sep 17 00:00:00 2001
From: raven <citrons@mondecitronne.com>
Date: Wed, 25 Mar 2026 16:08:04 -0500
Subject: BlockPermissions

---
 server/block_def.go | 51 +++++++++++++++++++++++++++++++++++++++++++++++++--
 server/blocks.go    | 12 +++++++++++-
 server/player.go    |  3 +++
 server/server.go    |  1 +
 4 files changed, 64 insertions(+), 3 deletions(-)

(limited to 'server')

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,
+		})
 	}
 }
diff --git a/server/blocks.go b/server/blocks.go
index bd4bbda..7bf7add 100644
--- a/server/blocks.go
+++ b/server/blocks.go
@@ -77,6 +77,7 @@ const (
 	blockStoneSlab; _
 	blockWoodSlab; _
 	blockCobblestoneTopSlab
+	blockBedrockSlab; _
 //	blockWoodPole
 //	blockStonePole
 //	blockCobblestonePole
@@ -86,6 +87,14 @@ const (
 )
 
 var blockDefinitions = map[blockType]blockDef {
+	blockBedrock: blockDef {
+		Name: "Bedrock",
+		Solidity: solid,
+		MovementSpeed: 128,
+		WalkSound: stoneSound,
+		Textures: [6]textureId {0x11, fillTextures},
+		AuthLevel: cheatAuth,
+	},
 	blockStone: blockDef {
 		Name: "Stone",
 		Solidity: solid,
@@ -157,6 +166,7 @@ func init() {
 	makeSlabs(blockCobblestone, blockCobblestoneTopSlab, "")
 	makeSlabs(blockPlanks, blockWoodSlab, "")
 	makeSlabs(blockStone, blockStoneSlab, "")
+	makeSlabs(blockBedrock, blockBedrockSlab, "")
 }
 
 var inventoryList = []blockType {
@@ -175,5 +185,5 @@ var inventoryList = []blockType {
 	blockTile, blockMagma, blockPillar, blockCrate, blockStoneBricks,
 	blockMossyStoneBricks, blockCrackedStoneBricks, blockPolishedStone,
 	blockDoubleSlab, blockSlab, blockStoneSlab, blockCobblestoneSlab,
-	blockWoodSlab, blockPumpkin, blockJackOLantern,
+	blockWoodSlab, blockBedrockSlab, blockPumpkin, blockJackOLantern,
 }
diff --git a/server/player.go b/server/player.go
index 358381d..51ddf54 100644
--- a/server/player.go
+++ b/server/player.go
@@ -110,6 +110,9 @@ func (p *player) sendAuthInfo() {
 			JumpHeight: 40,
 		})
 	}
+	if p.extensions["BlockPermissions"] {
+		p.client.SendPackets(p, getBlockPermissionPackets(p.state.Auth))
+	}
 }
 
 func (p *player) handlePacket(packet classic.Packet) {
diff --git a/server/server.go b/server/server.go
index 1ee7994..7aee35c 100644
--- a/server/server.go
+++ b/server/server.go
@@ -26,6 +26,7 @@ var supportedExtensions = []string {
 	"BlockDefinitions",
 	"BlockDefinitionsExt.2",
 	"InventoryOrder",
+	"BlockPermissions",
 }
 var requiredExtensions = []string {
 	"ExtEntityPositions",
-- 
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