1 files changed, 45 insertions, 0 deletions
diff --git a/server/client-lib/src/gamedata_index.rs b/server/client-lib/src/gamedata_index.rs
new file mode 100644
index 00000000..8aa5e4af
--- /dev/null
+++ b/server/client-lib/src/gamedata_index.rs
@@ -0,0 +1,45 @@
+/*
+    Hurry Curry! - a game about cooking
+    Copyright (C) 2025 Hurry Curry! Contributors
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, version 3 of the License only.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+*/
+use hurrycurry_protocol::{Gamedata, ItemIndex, Recipe, RecipeIndex, TileIndex};
+use std::collections::HashMap;
+
+#[derive(Debug, Default)]
+pub struct GamedataIndex {
+    pub tile_collide: Vec<bool>,
+    pub recipe_passive_by_input: HashMap<ItemIndex, Vec<RecipeIndex>>,
+}
+
+impl GamedataIndex {
+    pub fn update(&mut self, data: &Gamedata) {
+        self.recipe_passive_by_input.clear();
+        self.tile_collide.clear();
+
+        for tile in (0..data.tile_names.len()).map(TileIndex) {
+            self.tile_collide.push(!data.tile_walkable.contains(&tile));
+        }
+
+        for (ri, r) in data.recipes() {
+            if let Recipe::Passive { input, .. } = r {
+                self.recipe_passive_by_input
+                    .entry(*input)
+                    .or_default()
+                    .push(ri);
+            }
+        }
+    }
+}