9 files changed, 38 insertions, 11 deletions
diff --git a/content/maps/_home.json b/content/maps/_home.json
index 13bbeb2..10a43b0 100644
--- a/content/maps/_home.json
+++ b/content/maps/_home.json
@@ -2,6 +2,7 @@
     "width": 64,
     "height": 64,
     "spawn": [0,0],
+	"permissions": {"build": true},
     "places": {},
     "field":[
         "%,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,",
diff --git a/content/maps/begin.json b/content/maps/begin.json
index 7dc0856..10c68b6 100644
--- a/content/maps/begin.json
+++ b/content/maps/begin.json
@@ -2,6 +2,7 @@
 	"width": 64,
 	"height": 64,
 	"spawn": [15, 30],
+	"permissions": {"build": true},
 	"places": {
 		"stairdown": [37, 33],
 		"caveentrance": [31, 50],
@@ -16,7 +17,6 @@
 	
 	
 	
-	
 		",,,,,,,,,,,,,,,,,,,,,,,,,,,~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ",
 		",,,,,,,,,,,,,,,,,~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ",
 		",,,,,,,,,,,,~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ",
diff --git a/content/maps/broom.json b/content/maps/broom.json
index c9f3762..38520d2 100644
--- a/content/maps/broom.json
+++ b/content/maps/broom.json
@@ -2,6 +2,7 @@
 	"width": 42,
 	"height": 23,
 	"spawn": [5, 15],
+	"permissions": {"build": true},
 	"places": {
 		"northentry": [6, 1]
 	},
diff --git a/content/maps/right.json b/content/maps/right.json
index 21cf1a0..27f13c0 100644
--- a/content/maps/right.json
+++ b/content/maps/right.json
@@ -2,6 +2,7 @@
 	"width": 64,
 	"height": 64,
 	"spawn": [10, 10],
+	"permissions": {"build": true},
 	"places": {
 		"left": [1, 12],
 		"bottomleft": [1, 39],
diff --git a/src/resources/mod.rs b/src/resources/mod.rs
index ae3f4e2..627a396 100644
--- a/src/resources/mod.rs
+++ b/src/resources/mod.rs
@@ -1,9 +1,11 @@
 
 mod ground;
 mod newentities;
+mod roompermissions;
 
 pub use ground::Ground;
 pub use newentities::NewEntities;
+pub use roompermissions::RoomPermissions;
 
 use std::collections::{HashMap};
 use specs::{Entity};
@@ -55,3 +57,4 @@ pub struct Emigration {
 pub struct Time {
 	pub time: Timestamp
 }
+
diff --git a/src/resources/roompermissions.rs b/src/resources/roompermissions.rs
new file mode 100644
index 0000000..e3646f3
--- /dev/null
+++ b/src/resources/roompermissions.rs
@@ -0,0 +1,8 @@
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Default, Debug, Clone, Deserialize, Serialize)]
+pub struct RoomPermissions {
+	#[serde(default)]
+	pub build: bool
+}
diff --git a/src/room.rs b/src/room.rs
index d0f22df..0b8ee3b 100644
--- a/src/room.rs
+++ b/src/room.rs
@@ -22,7 +22,8 @@ use crate::{
 		Spawn as SpawnPosition,
 		Players,
 		Emigration,
-		Time
+		Time,
+		RoomPermissions
 	},
 	components::{
 		Position,
@@ -125,7 +126,7 @@ impl <'a, 'b>Room<'a, 'b> {
 		register_insert!(
 			world,
 			(Position, Visible, Controller, Movable, New, Removed, Moved, Player, Inventory, Health, Serialise, RoomExit, Entered, TriggerBox, Trap, Fighter, Healing, ControlCooldown, Autofight, MonsterAI, Home, AttackInbox, Item, Spawner, Clan, Faction, Interactable, Loot, Timer, Equipment, TimeOffset, Flags, Ear, Build, Whitelist, Dedup, Minable, LootHolder, OnSpawn, Substitute),
-			(Ground, Input, Output, Size, Spawn, Players, Emigration, Time)
+			(Ground, Input, Output, Size, Spawn, Players, Emigration, Time, RoomPermissions)
 		);
 		
 		Room {
@@ -143,6 +144,7 @@ impl <'a, 'b>Room<'a, 'b> {
 		self.world.fetch_mut::<Size>().height = height;
 		
 		self.world.fetch_mut::<SpawnPosition>().pos = template.spawn;
+		self.world.insert::<RoomPermissions>(template.permissions.clone());
 		
 		for (idx, templates) in template.field.iter().enumerate() {
 			let x = (idx as i64) % width;
diff --git a/src/roomtemplate.rs b/src/roomtemplate.rs
index d853b20..2614441 100644
--- a/src/roomtemplate.rs
+++ b/src/roomtemplate.rs
@@ -1,11 +1,12 @@
 
 use std::collections::HashMap;
-use serde_json::{json, Value};
+use serde_json::{json, Value, value};
 use crate::{
 	Pos,
 	Template,
 	PResult,
-	perr
+	perr,
+	resources::RoomPermissions
 };
 
 #[derive(Debug, Clone)]
@@ -13,7 +14,8 @@ pub struct RoomTemplate {
 	pub size: (i64, i64),
 	pub spawn: Pos,
 	pub field: Vec<Vec<Template>>,
-	pub places: HashMap<String, Pos>
+	pub places: HashMap<String, Pos>,
+	pub permissions: RoomPermissions
 }
 
 impl RoomTemplate {
@@ -54,11 +56,19 @@ impl RoomTemplate {
 			places.insert(name.to_string(), Pos::from_json(jsonpos).ok_or(perr!("pos of places invalid"))?);
 		}
 		
+		let permissions: RoomPermissions = value::from_value::<RoomPermissions>(
+			jsonroom
+				.get("permissions")
+				.unwrap_or(&json!({}))
+				.clone()
+			).map_err(|e| perr!("can't deserialise permissions: {:?}", e))?;
+		
 		Ok(RoomTemplate {
 			size,
 			spawn,
 			field,
-			places
+			places,
+			permissions
 		})
 	}
 }
diff --git a/src/systems/useitem.rs b/src/systems/useitem.rs
index 485b1da..a560c18 100644
--- a/src/systems/useitem.rs
+++ b/src/systems/useitem.rs
@@ -20,7 +20,7 @@ use crate::{
 		AttackType,
 		Flags
 	},
-	resources::{NewEntities, Ground},
+	resources::{NewEntities, Ground, RoomPermissions},
 	item::ItemAction::{None, Build, Eat, Equip},
 	controls::Control,
 };
@@ -36,10 +36,11 @@ impl <'a> System<'a> for Use {
 		Write<'a, NewEntities>,
 		WriteStorage<'a, AttackInbox>,
 		Read<'a, Ground>,
-		ReadStorage<'a, Flags>
+		ReadStorage<'a, Flags>,
+		Read<'a, RoomPermissions>
 	);
 	
-	fn run(&mut self, (entities, controllers, positions, mut inventories, mut new, mut attacked, ground, flags): Self::SystemData) {
+	fn run(&mut self, (entities, controllers, positions, mut inventories, mut new, mut attacked, ground, flags, roompermissions): Self::SystemData) {
 		for (ent, controller, position, inventory) in (&entities, &controllers, &positions, &mut inventories).join(){
 			match &controller.control {
 				Control::Use(rank) => {
@@ -47,7 +48,7 @@ impl <'a> System<'a> for Use {
 						match &entry.item.action {
 							Build(template, required_flags, blocking_flags) => {
 								let ground_flags = ground.flags_on(position.pos, &flags);
-								if required_flags.is_subset(&ground_flags) && blocking_flags.is_disjoint(&ground_flags){
+								if roompermissions.build && required_flags.is_subset(&ground_flags) && blocking_flags.is_disjoint(&ground_flags){
 									new.create(position.pos, &template).unwrap();
 									inventory.items.remove(*rank);
 								}