From 2b5824035f9e30337a1d764c9bb447c7c6e9a2a6 Mon Sep 17 00:00:00 2001
From: Ted Milker <tmilker@gmail.com>
Date: Sat, 6 Nov 2021 17:41:32 -0500
Subject: [PATCH] Filter out multiple enemy messages moving to the same
 location

---
 WinningAndLosing/gauntlet/src/systems/mod.rs  |  3 +++
 .../gauntlet/src/systems/movement_filter.rs   | 20 +++++++++++++++++++
 2 files changed, 23 insertions(+)
 create mode 100644 WinningAndLosing/gauntlet/src/systems/movement_filter.rs

diff --git a/WinningAndLosing/gauntlet/src/systems/mod.rs b/WinningAndLosing/gauntlet/src/systems/mod.rs
index 1222bf2..5850038 100644
--- a/WinningAndLosing/gauntlet/src/systems/mod.rs
+++ b/WinningAndLosing/gauntlet/src/systems/mod.rs
@@ -7,6 +7,7 @@ mod random_move;
 mod chasing;
 mod end_turn;
 mod movement;
+mod movement_filter;
 mod hud;
 mod tooltips;
 mod combat;
@@ -42,6 +43,8 @@ pub fn build_monster_scheduler() -> Schedule {
         .flush()
         .add_system(combat::combat_system())
         .flush()
+        .add_system(movement_filter::movement_filter_system())
+        .flush()
         .add_system(movement::movement_system())
         .flush()
         .add_system(map_render::map_render_system())
diff --git a/WinningAndLosing/gauntlet/src/systems/movement_filter.rs b/WinningAndLosing/gauntlet/src/systems/movement_filter.rs
new file mode 100644
index 0000000..63c8eb4
--- /dev/null
+++ b/WinningAndLosing/gauntlet/src/systems/movement_filter.rs
@@ -0,0 +1,20 @@
+use crate::prelude::*;
+
+#[system]
+#[read_component(WantsToMove)]
+pub fn movement_filter(
+    ecs: &mut SubWorld,
+    commands: &mut CommandBuffer) {
+
+    let mut moves = <(Entity, &WantsToMove)>::query();
+    let mut pos_seen: Vec<Point> = Vec::new();
+
+    moves.iter(ecs).for_each(|(entity, want_move)| {
+        if pos_seen.contains(&want_move.destination) {
+            commands.remove(*entity);
+        }
+        else {
+            pos_seen.push(want_move.destination);
+        }
+    });
+}
\ No newline at end of file