Deletion implemented

src/infrastructure/node_manager.zig

@@ -2,6 +2,7 @@ const std = @import("std");
 const Vector2 = @import("raylib").Vector2;
 
 const c = @import("../constants.zig");
+const e = @import("../errors.zig");
 const Node = @import("node.zig").Node;
 const Road = @import("road.zig").Road;
 
@@ -18,10 +19,9 @@ pub const NodeManager = struct {
         };
     }
 
-    pub fn deinit(self: *NodeManager, allocator: std.mem.Allocator) void {
+    pub fn deinit(self: *NodeManager, allocator: std.mem.Allocator) !void {
         for (self.nodes.items) |node| {
-            node.deinit(allocator);
-            allocator.destroy(node);
+            try node.deinit(allocator);
         }
         self.nodes.deinit(allocator);
     }
@@ -36,7 +36,7 @@ pub const NodeManager = struct {
             var cur_node = Node.init(0, pos);
             // Temporary road that is to be drawn as one in the making
             const road: Road = .init(0, node, &cur_node);
-            road.draw();
+            road.draw(false);
 
             node.*.draw(c.NODE_TEMP_COLOUR);
             cur_node.draw(c.NODE_CURSOR_COLOUR);
@@ -64,15 +64,28 @@ pub const NodeManager = struct {
         return id;
     }
 
-    pub fn clear(self: *NodeManager, allocator: std.mem.Allocator) void {
+    pub fn clear(self: *NodeManager, allocator: std.mem.Allocator) !void {
         self.temp_node = null;
         for (self.nodes.items) |node| {
-            node.deinit(allocator);
-            allocator.destroy(node);
+            try node.deinit(allocator);
         }
         self.nodes.clearRetainingCapacity();
         self.next_id = 0;
     }
+
+    pub fn deleteNode(self: *NodeManager, allocator: std.mem.Allocator, node_to_delete: *Node) !void {
+        if (node_to_delete.roads.items.len != 0) return e.Entity.HasReferences;
+
+        for (0..self.nodes.items.len) |i| {
+            if (self.nodes.items[i] != node_to_delete) continue;
+
+            try node_to_delete.deinit(allocator);
+            _ = self.nodes.swapRemove(i);
+            return;
+        }
+
+        return e.Entity.NotFound;
+    }
 };
 
 const expect = std.testing.expect;
@@ -101,4 +114,5 @@ test "id tracking" {
 }
 
 // TODO tests
-// force resize pointer test
+// force resize pointer test
+// deleting nodes