Added indexed lists and link edition in tunes

folkugat_web/model/_base.py

@@ -0,0 +1,36 @@
+import dataclasses
+from typing import Optional, TypeVar
+
+
+@dataclasses.dataclass
+class WithId:
+    id: Optional[int]
+
+
+T = TypeVar("T", bound=WithId)
+
+
+class IndexedList(list[T]):
+    def append(self, _item: T) -> None:
+        if _item.id is None:
+            _item.id = max((i.id or 0 for i in self), default=0) + 1
+        return super().append(_item)
+
+    def find_idx(self, _id: int) -> int:
+        try:
+            i, _ = next(filter(lambda it: it[1].id == _id, enumerate(self)))
+        except StopIteration:
+            raise ValueError(f"Could not find item with id {_id}")
+        return i
+
+    def get(self, _id: int) -> T:
+        i = self.find_idx(_id)
+        return self.__getitem__(i)
+
+    def delete(self, _id: int) -> None:
+        i = self.find_idx(_id)
+        return super().__delitem__(i)
+
+    def replace(self, _id: int, _obj: T) -> None:
+        i = self.find_idx(_id)
+        super().__setitem__(i, _obj)