5 files changed, 58 insertions, 3 deletions
diff --git a/src/assemblages.rs b/src/assemblages.rs
index 61833b4..a80e5c9 100644
--- a/src/assemblages.rs
+++ b/src/assemblages.rs
@@ -31,7 +31,7 @@ macro_rules! assemblage {
 }
 
 
-pub trait Assemblage {
+pub trait Assemblage: Send + Sync {
 	fn build<'a>(&self, builder: EntityBuilder<'a>) -> EntityBuilder<'a>;
 }
 
diff --git a/src/main.rs b/src/main.rs
index abf6039..6e64154 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -13,12 +13,13 @@ pub mod assemblages;
 pub mod components;
 pub mod resources;
 pub mod systems;
+pub mod worldmessages;
 
 use self::gameserver::GameServer;
 use self::server::unixserver::UnixServer;
 use self::server::tcpserver::TcpServer;
 use self::server::Server;
-use self::assemblages::{Player, Wall, Grass};
+use self::assemblages::{Wall, Grass};
 
 use serde_json;
 
diff --git a/src/resources.rs b/src/resources.rs
index 0e32423..b35a9d2 100644
--- a/src/resources.rs
+++ b/src/resources.rs
@@ -31,5 +31,5 @@ pub struct Floor {
 
 #[derive(Default)]
 pub struct NewEntities {
-	pub assemblages: Vec<(Position, Box<dyn Assemblage + Send + Sync>)>
+	pub assemblages: Vec<(Position, Box<dyn Assemblage>)>
 }
diff --git a/src/util.rs b/src/util.rs
index 1e7821f..fed0400 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -1,8 +1,12 @@
 
 
 use std::cmp::{min, max};
+use serde_json::Value;
 
 pub fn clamp<T: Ord>(val: T, lower: T, upper: T) -> T{
 	return max(min(val, upper), lower);
 }
 
+pub trait ToJson {
+	fn to_json(&self) -> Value;
+}
diff --git a/src/worldmessages.rs b/src/worldmessages.rs
new file mode 100644
index 0000000..1d00028
--- /dev/null
+++ b/src/worldmessages.rs
@@ -0,0 +1,50 @@
+
+use serde_json::{Value, json};
+use super::util::ToJson;
+// use serde::Serialize;
+
+// #[derive(Serialize)]
+pub struct WorldMessage {
+	pub updates: Vec<WorldUpdate>
+	
+}
+
+impl ToJson for WorldMessage {
+	fn to_json(&self) -> Value {
+		let updates: Vec<Value> = self.updates.iter().map(|u| u.to_json()).collect();
+		json!(["world", updates])
+	}
+}
+
+pub enum WorldUpdate {
+	Field(FieldMessage)
+}
+
+impl ToJson for WorldUpdate {
+	fn to_json(&self) -> Value {
+		match self {
+			WorldUpdate::Field(msg) => Value::Array(vec![Value::String("field".to_string()), msg.to_json()])
+		}
+	}
+}
+
+pub struct FieldMessage {
+	width: i32,
+	height: i32,
+	field: Vec<usize>,
+	mapping: Vec<Vec<String>>
+}
+
+
+impl ToJson for FieldMessage {
+	fn to_json(&self) -> Value {
+		json!({
+			"width": self.width,
+			"height": self.height,
+			"field": self.field,
+			"mapping": self.mapping
+		})
+	}
+}
+
+