Add Furniture struct

src/activities/house/furniture.rs

@@ -0,0 +1,90 @@
+use comfy::{error, texture_id, EngineContext, HashSet, Lazy, Mutex, TextureHandle};
+use std::{fs, io, sync::Arc};
+
+static ASSETS_LOADED: Lazy<Arc<Mutex<HashSet<String>>>> =
+	Lazy::new(|| Arc::new(Mutex::new(HashSet::new())));
+
+struct FurnitureAsset {
+	folder: String,
+	name: String
+}
+
+struct FurnitureTextureHandles {
+	human: Option<TextureHandle>,
+	magnet: Option<TextureHandle>,
+	elec: Option<TextureHandle>
+}
+
+impl FurnitureAsset {
+	fn asset_path(&self) -> String {
+		format!("{}/{}.png", self.folder, self.name)
+	}
+
+	fn asset_path_magnet(&self) -> String {
+		format!("{}/magnet/{}.png", self.folder, self.name)
+	}
+
+	fn asset_path_elec(&self) -> String {
+		format!("{}/elec/{}.png", self.folder, self.name)
+	}
+
+	fn load_asset_path(
+		&self,
+		path: String,
+		ctx: &mut EngineContext<'_>
+	) -> Option<TextureHandle> {
+		let mut loaded = ASSETS_LOADED.lock();
+		if loaded.contains(&path) {
+			return None;
+		}
+		let bytes = match fs::read(format!(
+			"{}/assets/furniture/{path}",
+			env!("CARGO_MANIFEST_DIR")
+		)) {
+			Ok(bytes) => bytes,
+			Err(err) if err.kind() == io::ErrorKind::NotFound => return None,
+			Err(err) => {
+				error!("Failed to load asset {path:?}: {err}");
+				return None;
+			}
+		};
+		ctx.load_texture_from_bytes(&path, &bytes);
+		let handle = texture_id(&path);
+		loaded.insert(path);
+		Some(handle)
+	}
+
+	/// Attempt to load the assets. Silently ignore missing assets.
+	fn load_assets(&self, ctx: &mut EngineContext<'_>) -> FurnitureTextureHandles {
+		FurnitureTextureHandles {
+			human: self.load_asset_path(self.asset_path(), ctx),
+			magnet: self.load_asset_path(self.asset_path_magnet(), ctx),
+			elec: self.load_asset_path(self.asset_path_elec(), ctx)
+		}
+	}
+}
+
+pub struct Furniture {
+	asset: FurnitureAsset,
+	handles: FurnitureTextureHandles,
+	on: Box<dyn Fn() -> bool>
+}
+
+impl Furniture {
+	pub fn new<F: Into<String>, N: Into<String>>(
+		folder: F,
+		name: N,
+		ctx: &mut EngineContext<'_>
+	) -> Self {
+		let asset = FurnitureAsset {
+			folder: folder.into(),
+			name: name.into()
+		};
+		let handles = asset.load_assets(ctx);
+		Self {
+			asset,
+			handles,
+			on: Box::new(|| false)
+		}
+	}
+}

src/activities/house/mod.rs

@@ -1,3 +1,4 @@
+mod furniture;
 mod grid;
 mod player;