fix: bugs with link buttons (#252)

* fix: bugs with link buttons

* chore: check enum instead of value

* chore: run pre-commit

* Fix component type issue

* Change comment

Co-authored-by: shiftinv <me@shiftinv.cc>

disnake/ui/view.py

@@ -52,7 +52,7 @@
     SelectMenu as SelectComponent,
     _component_factory,
 )
-from ..enums import try_enum_to_int
+from ..enums import ComponentType, try_enum_to_int
 from .item import Item
 
 __all__ = ("View",)
@@ -397,23 +397,34 @@ def _dispatch_item(self, item: Item, interaction: MessageInteraction):
         )
 
     def refresh(self, components: List[Component]):
-        # This is pretty hacky at the moment
-        # fmt: off
+        # TODO: this is pretty hacky at the moment
         old_state: Dict[Tuple[int, str], Item] = {
             (item.type.value, item.custom_id): item  # type: ignore
             for item in self.children
             if item.is_dispatchable()
         }
-        # fmt: on
         children: List[Item] = []
         for component in _walk_all_components(components):
+            older: Optional[Item] = None
             try:
                 older = old_state[(component.type.value, component.custom_id)]  # type: ignore
             except (KeyError, AttributeError):
-                children.append(_component_to_item(component))
-            else:
+                # workaround for url buttons, since they're not part of `old_state`
+                if isinstance(component, ButtonComponent):
+                    for child in self.children:
+                        if (
+                            child.type is ComponentType.button
+                            and child.label == component.label  # type: ignore
+                            and child.url == component.url  # type: ignore
+                        ):
+                            older = child
+                            break
+
+            if older:
                 older.refresh_component(component)
                 children.append(older)
+            else:
+                children.append(_component_to_item(component))
 
         self.children = children