Making progress.

src/storage.rs

@@ -0,0 +1,36 @@
+use std::collections::HashMap;
+
+use crate::item::Item;
+
+pub struct Storage {
+    keys: HashMap<String, usize>,
+    items: Vec<Item>,
+}
+
+impl Storage {
+    pub fn new() -> Self {
+        Storage {
+            keys: HashMap::new(),
+            items: Vec::new(),
+        }
+    }
+
+    pub fn contains_key(&self, key: &str) -> bool {
+        self.keys.contains_key(key)
+    }
+
+    pub fn insert(&mut self, key: String, item: Item) {
+        let index = self.items.len();
+
+        self.items.push(item);
+        self.keys.insert(key, index);
+    }
+
+    pub fn get_id(&self, key: &str) -> usize {
+        self.keys[key]
+    }
+
+    pub fn get_item(&mut self, id: usize) -> &mut Item {
+        &mut self.items[id]
+    }
+}