Refactor resource caches and use it with textures now

src/resource_cache.rs

@@ -0,0 +1,52 @@
+use std::collections::HashMap;
+
+#[derive(Copy, Clone, PartialEq, Debug)]
+struct CacheID {
+	index: usize,
+}
+
+impl CacheID {
+	fn new(index: usize) -> Self {
+		Self { index }
+	}
+}
+
+pub struct ResourceCache<T> {
+	pub resources: Vec<T>,
+	name_to_id: HashMap<String, CacheID>,
+}
+
+impl<T> ResourceCache<T> {
+	pub fn new() -> Self {
+		let resources = Vec::new();
+		let name_to_id = HashMap::new();
+
+		Self {
+			resources,
+			name_to_id,
+		}
+	}
+
+	#[allow(dead_code)]
+	pub fn get(&self, name: &str) -> Option<&T> {
+		match self.name_to_id.get(name) {
+			Some(id) => self.resources.get(id.index),
+			None => None,
+		}
+	}
+
+	#[allow(dead_code)]
+	pub fn set(&mut self, name: &str, resource: T) {
+		match self.name_to_id.get(name) {
+			Some(id) => {
+				self.resources[id.index] = resource;
+			},
+			None => {
+				let last_index = self.name_to_id.len();
+				let id = CacheID::new(last_index);
+				self.name_to_id.insert(String::from(name), id);
+				self.resources.push(resource);
+			}
+		}
+	}
+}