From 239f139e7cdc2ee9f2658a8038d2870293e20aa4 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Sun, 19 Oct 2025 20:16:38 +0200
Subject: Start moving game logic to client-lib. Moved set_tile and gamedata
 index

---
 server/client-lib/src/lib.rs           | 52 +++++++++++++++++++++++-----------
 server/client-lib/src/spatial_index.rs |  2 --
 2 files changed, 36 insertions(+), 18 deletions(-)

(limited to 'server/client-lib/src')

diff --git a/server/client-lib/src/lib.rs b/server/client-lib/src/lib.rs
index f2c47ea0..79c2ed01 100644
--- a/server/client-lib/src/lib.rs
+++ b/server/client-lib/src/lib.rs
@@ -25,7 +25,7 @@ use hurrycurry_protocol::{
 };
 use spatial_index::SpatialIndex;
 use std::{
-    collections::{BTreeSet, HashMap, HashSet},
+    collections::{BTreeSet, HashMap, HashSet, VecDeque},
     sync::Arc,
     time::Instant,
 };
@@ -67,17 +67,20 @@ pub struct Player {
 pub struct Game {
     pub data: Arc<Gamedata>,
     pub data_index: GamedataIndex,
+
     pub tiles: HashMap<IVec2, Tile>,
-    pub walkable: HashSet<IVec2>,
     pub players: HashMap<PlayerID, Player>,
-    pub players_spatial_index: SpatialIndex<PlayerID>,
     pub end: Option<Instant>,
     pub lobby: bool,
-
     pub environment_effects: HashSet<String>,
     pub score: Score,
-
     pub player_id_counter: i64,
+
+    pub players_spatial_index: SpatialIndex<PlayerID>,
+    pub walkable: HashSet<IVec2>,
+    pub tile_index: HashMap<TileIndex, HashSet<IVec2>>,
+
+    pub events: VecDeque<PacketC>,
 }
 
 impl Game {
@@ -164,17 +167,7 @@ impl Game {
                 kind,
                 neighbors: _,
             } => {
-                if let Some(kind) = kind {
-                    self.tiles.insert(tile, Tile { kind, item: None });
-                    if self.data_index.tile_collide[kind.0] {
-                        self.walkable.remove(&tile);
-                    } else {
-                        self.walkable.insert(tile);
-                    }
-                } else {
-                    self.tiles.remove(&tile);
-                    self.walkable.remove(&tile);
-                }
+                self.set_tile(tile, kind);
             }
             PacketC::Communicate {
                 player,
@@ -200,6 +193,33 @@ impl Game {
         }
     }
 
+    pub fn set_tile(&mut self, pos: IVec2, kind: Option<TileIndex>) {
+        self.tiles.remove(&pos);
+        self.walkable.remove(&pos);
+        if let Some(prev) = self.tiles.get(&pos) {
+            if let Some(set) = self.tile_index.get_mut(&prev.kind) {
+                set.remove(&pos);
+            }
+        }
+        if let Some(kind) = kind {
+            self.tiles.insert(pos, Tile { kind, item: None });
+            if self.data_index.tile_collide[kind.0] {
+                self.walkable.insert(pos);
+            }
+            self.tile_index.entry(kind).or_default().insert(pos);
+        }
+        self.events.push_back(PacketC::UpdateMap {
+            tile: pos,
+            kind,
+            neighbors: [
+                self.tiles.get(&(pos + IVec2::NEG_Y)).map(|e| e.kind),
+                self.tiles.get(&(pos + IVec2::NEG_X)).map(|e| e.kind),
+                self.tiles.get(&(pos + IVec2::Y)).map(|e| e.kind),
+                self.tiles.get(&(pos + IVec2::X)).map(|e| e.kind),
+            ],
+        });
+    }
+
     pub fn tick(&mut self, dt: f32) {
         self.score.time_remaining -= dt as f64;
         self.score.time_remaining -= self.score.time_remaining.max(0.);
diff --git a/server/client-lib/src/spatial_index.rs b/server/client-lib/src/spatial_index.rs
index 8b717ca3..8dd0cc22 100644
--- a/server/client-lib/src/spatial_index.rs
+++ b/server/client-lib/src/spatial_index.rs
@@ -23,8 +23,6 @@ pub struct SpatialIndex<T> {
     bins: HashMap<IVec2, Vec<T>>,
 }
 
-// TODO maybe dont use 1x1 bins but something bigger like 10x10 for better perf
-
 impl<T: Eq + Hash + Copy> SpatialIndex<T> {
     pub fn update_entry(&mut self, id: T, position: Vec2) {
         self.remove_entry(id);
-- 
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