Add demand sink entity (close #532)

2 files changed, 59 insertions, 11 deletions

diff --git a/server/src/entity/demand_sink.rs b/server/src/entity/demand_sink.rs
new file mode 100644
index 00000000..a653fe3e
--- /dev/null
+++ b/server/src/entity/demand_sink.rs
@@ -0,0 +1,46 @@
+/*
+    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 crate::entity::{Entity, EntityContext};
+use anyhow::Result;
+use hurrycurry_locale::TrError;
+use hurrycurry_protocol::glam::IVec2;
+
+pub struct DemandSink {
+    pub pos: IVec2,
+}
+impl Entity for DemandSink {
+    fn tick(&mut self, c: EntityContext<'_>) -> Result<(), TrError> {
+        let Some(tile) = c.game.tiles.get(&self.pos) else {
+            return Ok(());
+        };
+        let Some(item) = &tile.item else {
+            return Ok(());
+        };
+        if let Some(demand) = c.game.data.demands.iter().find(|d| d.input == item.kind) {
+            c.game.score.demands_completed += 1;
+            c.game.score.points += demand.points;
+            *c.score_changed = true
+            // TODO satisfied effect
+        } else {
+            // No effect
+        }
+        c.game.set_item(self.pos, None);
+        Ok(())
+    }
+}
diff --git a/server/src/entity/mod.rs b/server/src/entity/mod.rs
index 279826a9..6e1a618c 100644
--- a/server/src/entity/mod.rs
+++ b/server/src/entity/mod.rs
@@ -15,21 +15,22 @@
     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 */
-pub mod book;
+mod book;
 pub mod bot;
-pub mod campaign;
-pub mod conveyor;
-pub mod customers;
-pub mod environment_effect;
-pub mod item_portal;
-pub mod pedestrians;
-pub mod player_portal;
-pub mod tag_minigame;
-pub mod tram;
+mod campaign;
+mod conveyor;
+mod customers;
+mod demand_sink;
+mod environment_effect;
+mod item_portal;
+mod pedestrians;
+mod player_portal;
+mod tag_minigame;
+mod tram;
 pub mod tutorial;
 
 use crate::{
-    entity::{pedestrians::Pedestrians, tag_minigame::TagMinigame},
+    entity::{demand_sink::DemandSink, pedestrians::Pedestrians, tag_minigame::TagMinigame},
     scoreboard::ScoreboardStore,
 };
 use anyhow::Result;
@@ -168,5 +169,6 @@ pub fn construct_entity(decl: &EntityDecl) -> DynEntity {
             cooldown: 0.,
             speed: speed.unwrap_or(0.6),
         }),
+        EntityDecl::DemandSink { pos } => Box::new(DemandSink { pos }),
     }
 }