got binary tree insert working need to isolate traversal and setup delete

src/weighted_adj_list.rs

@@ -0,0 +1,58 @@
+use std::collections::HashMap;
+
+pub struct WeightedAdjacencyList<T, W> {
+    vertices: HashMap<T, HashMap<T, W>>,
+}
+
+impl<T, W> Clone for WeightedAdjacencyList<T, W>
+where
+    T: Clone,
+    W: Clone,
+{
+    fn clone(&self) -> Self {
+        WeightedAdjacencyList {
+            vertices: self.vertices.clone(),
+        }
+    }
+}
+
+impl<T, W> WeightedAdjacencyList<T, W>
+where
+    T: std::hash::Hash + Eq + Clone,
+{
+    // Constructor to create a new weighted adjacency list
+    pub fn new() -> Self {
+        WeightedAdjacencyList {
+            vertices: HashMap::new(),
+        }
+    }
+
+    // Method to add a vertex to the adjacency list
+    pub fn add_vertex(&mut self, vertex: T) {
+        self.vertices.entry(vertex).or_insert(HashMap::new());
+    }
+
+    // Method to add an edge with weight between two vertices
+    pub fn add_edge(&mut self, from: T, to: T, weight: W) {
+        // Ensure both vertices exist in the adjacency list
+        self.add_vertex(from.clone());
+        self.add_vertex(to.clone());
+
+        // Add the edge from 'from' to 'to' with weight
+        self.vertices.get_mut(&from).unwrap().insert(to, weight);
+    }
+
+    // Method to get the weight of an edge between two vertices
+    pub fn get_weight(&self, from: &T, to: &T) -> Option<&W> {
+        self.vertices.get(from)?.get(to)
+    }
+
+    // Method to get the neighbors of a vertex
+    pub fn get_neighbors(&self, vertex: &T) -> Option<&HashMap<T, W>> {
+        self.vertices.get(vertex)
+    }
+    // Method to get the number of vertices in the adjacency list
+    pub fn len(&self) -> usize {
+        self.vertices.len()
+    }
+}