Splitting road implementation preparation

src/infrastructure/node_manager.zig

@@ -50,11 +50,22 @@ pub const NodeManager = struct {
         }
     }
 
+    /// Tries to find a node which snapping radius covers the pos
+    ///
+    /// If it does it returns a reference to it, otherwise null
+    pub fn getNodeIfExists(self: *const NodeManager, pos: Vector2) ?*Node {
+        for (self.nodes.items) |node| {
+            if (node.withinSnapRadius(pos)) return node;
+        }
+
+        return null;
+    }
+
     /// Checks if there is a node pointer within the snap radius of pos coordinate;
     /// otherwise creates a new node and returns its pointer
     pub fn getSelectedNode(self: *NodeManager, allocator: std.mem.Allocator, pos: Vector2) !*Node {
-        for (self.nodes.items) |node| {
-            if (node.withinSnapRadius(pos)) return node;
+        if (self.getNodeIfExists(pos)) |node| {
+            return node;
         }
 
         // No node is within that position, so we must create a new one