working mapping?

src/hooked_containers/mapping.py

@@ -1,9 +1,8 @@
-from collections.abc import MutableMapping, Sequence
+from collections.abc import MutableMapping, MutableSequence
-from copy import copy
 from typing import TypeVar
 
 from . import events as e
-from .container import HookedContainer, MutableNesting
+from .container import HookedContainer, HookFunction, MutableNesting
 
 T = TypeVar("T")
 
@@ -13,33 +12,50 @@ class HookedMapping(HookedContainer[T], MutableMapping[T, MutableNesting[T]]):
 
     def __init__(
         self,
-        hook,
         existing: MutableMapping[T, MutableNesting[T]],
-        path: Sequence[int] | None = None,
+        hook: HookFunction | None = None,
+        path: MutableSequence[int] | None = None,
     ):
         self.hook = hook
+        match existing:
+            case HookedMapping(_data=seq):
+                self._data = seq
+            case MutableMapping() as seq:
+                self._data = seq
+            case _ as it:
+                self._data = dict(it)
         self._data = existing
         self._path = list(path) if path is not None else []
 
+    # MutableMapping Methods
+
+    def __iter__(self):
+        return iter(self._data)
+
+    def insert(self, key: T, value: MutableNesting[T]) -> None:
+        self._data[key] = value
+        if self.hook:
+            self.hook(e.AddItemEvent(index=key, item=value, path=self.new_path(key)))
+
+    # HookedContainer methods
+
     def __getitem__(self, key: T) -> MutableNesting[T]:
-        value = self._data[key]
+        value = self._data.get(key, {})
-        new_path = copy(self._path)
-        new_path.append(key)
         match value:
+            case HookedMapping(_data=seq):
+                return type(self)(seq, hook=self.hook, path=self.new_path(key))
             case MutableMapping() as mapping:
-                return HookedMapping(mapping, self.hook, path=new_path)
+                return HookedMapping(mapping, hook=self.hook, path=self.new_path(key))
-            case HookedContainer() as seq:
-                return type(self)(seq, self.hook, path=new_path)
             case _ as item:
                 return item
 
     def __setitem__(self, key: T, value: MutableNesting[T]) -> None:
         self._data[key] = value
         if self.hook:
-            self.hook(e.SetItemEvent(index=key, item=value))
+            self.hook(e.SetItemEvent(index=key, item=value, path=self.new_path(key)))
 
     def __delitem__(self, key: T) -> None:
         item = self._data[key]
         del self._data[key]
         if self.hook:
-            self.hook(e.RemoveItemEvent(index=key, item=item, path=self._path))
+            self.hook(e.RemoveItemEvent(index=key, item=item, path=self.new_path(key)))