music_kraken/objects/collection.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from collections import defaultdict
-from typing import TypeVar, Generic, Dict, Optional, Iterable, List, Iterator, Tuple, Generator, Union, Any
+from typing import TypeVar, Generic, Dict, Optional, Iterable, List, Iterator, Tuple, Generator, Union
 from .parents import OuterProxy
 from ..utils import object_trace
 
@@ -22,27 +22,28 @@ class Collection(Generic[T]):
             self,
             data: Optional[Iterable[T]] = None,
             sync_on_append: Dict[str, Collection] = None,
-            append_object_to_attribute: Dict[str, T] = None,
-            extend_object_to_attribute: Dict[str, Collection] = None,
+            contain_given_in_attribute: Dict[str, Collection] = None,
+            contain_attribute_in_given: Dict[str, Collection] = None,
+            append_object_to_attribute: Dict[str, T] = None
     ) -> None:
         self._collection_for: dict = dict()
 
         self._contains_ids = set()
         self._data = []
 
+        self.parents: List[Collection[T]] = []
+        self.children: List[Collection[T]] = []
+
         # List of collection attributes that should be modified on append
         # Key: collection attribute (str) of appended element
         # Value: main collection to sync to
+        self.contain_given_in_attribute: Dict[str, Collection] = contain_given_in_attribute or {}
         self.append_object_to_attribute: Dict[str, T] = append_object_to_attribute or {}
-        self.extend_object_to_attribute: Dict[str, Collection[T]] = extend_object_to_attribute or {}
         self.sync_on_append: Dict[str, Collection] = sync_on_append or {}
 
         self._id_to_index_values: Dict[int, set] = defaultdict(set)
-        
-        # This is to cleanly unmap previously mapped items by their id
-        self._indexed_from_id: Dict[int, Dict[str, Any]] = defaultdict(dict)
-        # this is to keep track and look up the actual objects
-        self._indexed_values: Dict[str, Dict[Any, T]] = defaultdict(dict)
+        self._indexed_values = defaultdict(lambda: None)
+        self._indexed_to_objects = defaultdict(lambda: None)
 
         self.extend(data)
 
@@ -50,34 +51,66 @@ class Collection(Generic[T]):
         return f"Collection({id(self)})"
 
     def _map_element(self, __object: T, from_map: bool = False):
-        self._unmap_element(__object.id)
+        self._contains_ids.add(__object.id)
 
-        self._indexed_from_id[__object.id]["id"] = __object.id
-        self._indexed_values["id"][__object.id] = __object
-
-        for name, value in __object.indexing_values:
+        for name, value in (*__object.indexing_values, ('id', __object.id)):
             if value is None or value == __object._inner._default_values.get(name):
                 continue
 
-            self._indexed_values[name][value] = __object
-            self._indexed_from_id[__object.id][name] = value
+            self._indexed_values[name] = value
+            self._indexed_to_objects[value] = __object
+
+            self._id_to_index_values[__object.id].add((name, value))
 
     def _unmap_element(self, __object: Union[T, int]):
         obj_id = __object.id if isinstance(__object, OuterProxy) else __object
 
-        if obj_id not in self._indexed_from_id:
-            return
+        if obj_id in self._contains_ids:
+            self._contains_ids.remove(obj_id)
 
-        for name, value in self._indexed_from_id[obj_id].items():
-            if value in self._indexed_values[name]:
-                del self._indexed_values[name][value]
+        for name, value in self._id_to_index_values[obj_id]:
+            if name in self._indexed_values:
+                del self._indexed_values[name]
+            if value in self._indexed_to_objects:
+                del self._indexed_to_objects[value]
 
-        del self._indexed_from_id[obj_id]
+        del self._id_to_index_values[obj_id]
 
-    def _find_object(self, __object: T) -> Optional[T]:
+    @property
+    def is_root(self) -> bool:
+        return len(self.parents) <= 0
+
+    def _find_object_in_self(self, __object: T) -> Optional[T]:
         for name, value in __object.indexing_values:
-            if value in self._indexed_values[name]:
-                return self._indexed_values[name][value]
+            if value == self._indexed_values[name]:
+                return self._indexed_to_objects[value]
+
+    def _find_object(self, __object: T, no_sibling: bool = False) -> Tuple[Collection[T], Optional[T]]:
+        other_object = self._find_object_in_self(__object)
+        if other_object is not None:
+            return self, other_object
+
+        for c in self.children:
+            o, other_object = c._find_object(__object)
+            if other_object is not None:
+                return o, other_object
+
+        if no_sibling:
+            return self, None
+
+        """
+        # find in siblings and all children of siblings
+        for parent in self.parents:
+            for sibling in parent.children:
+                if sibling is self:
+                    continue
+
+                o, other_object = sibling._find_object(__object, no_sibling=True)
+                if other_object is not None:
+                    return o, other_object
+        """
+
+        return self, None
 
     def append(self, __object: Optional[T], already_is_parent: bool = False, from_map: bool = False):
         """
@@ -94,15 +127,15 @@ class Collection(Generic[T]):
         if __object is None:
             return
 
-        existing_object = self._find_object(__object)
+        append_to, existing_object = self._find_object(__object)
 
         if existing_object is None:
             # append
-            self._data.append(__object)
-            self._map_element(__object)
+            append_to._data.append(__object)
+            append_to._map_element(__object)
 
-            for collection_attribute, child_collection in self.extend_object_to_attribute.items():
-                __object.__getattribute__(collection_attribute).extend(child_collection)
+            for collection_attribute, child_collection in self.contain_given_in_attribute.items():
+                __object.__getattribute__(collection_attribute).contain_collection_inside(child_collection, __object)
 
             for attribute, new_object in self.append_object_to_attribute.items():
                 __object.__getattribute__(attribute).append(new_object)
@@ -131,9 +164,9 @@ class Collection(Generic[T]):
             existing_object.merge(__object)
 
             if existing_object.id != old_id:
-                self._unmap_element(old_id)
+                append_to._unmap_element(old_id)
 
-            self._map_element(existing_object)            
+            append_to._map_element(existing_object)
 
     def extend(self, __iterable: Optional[Generator[T, None, None]]):
         if __iterable is None:
@@ -142,22 +175,54 @@ class Collection(Generic[T]):
         for __object in __iterable:
             self.append(__object)
 
+    def contain_collection_inside(self, sub_collection: Collection, _object: T):
+        """
+        This collection will ALWAYS contain everything from the passed in collection
+        """
+        if self is sub_collection or sub_collection in self.children:
+            return
+
+        _object._inner._is_collection_child[self] = sub_collection
+        _object._inner._is_collection_parent[sub_collection] = self
+
+        self.children.append(sub_collection)
+        sub_collection.parents.append(self)
+
     @property
     def data(self) -> List[T]:
         return list(self.__iter__())
 
     def __len__(self) -> int:
-        return len(self._data)
+        return len(self._data) + sum(len(collection) for collection in self.children)
 
     @property
     def empty(self) -> bool:
         return self.__len__() <= 0
 
-    def __iter__(self) -> Iterator[T]:
-        yield from self._data
+    def __iter__(self, finished_ids: set = None) -> Iterator[T]:
+        _finished_ids = finished_ids or set()
+
+        for element in self._data:
+            if element.id in _finished_ids:
+                continue
+            _finished_ids.add(element.id)
+            yield element
+
+        for c in self.children:
+            yield from c.__iter__(finished_ids=finished_ids)
 
     def __merge__(self, __other: Collection, override: bool = False):
         self.extend(__other)
 
     def __getitem__(self, item: int):
+        if item < len(self._data):
             return self._data[item]
+
+        item = item - len(self._data)
+
+        for c in self.children:
+            if item < len(c):
+                return c.__getitem__(item)
+            item = item - len(c._data)
+
+        raise IndexError

music_kraken/objects/parents.py

@@ -34,6 +34,10 @@ class InnerData:
         self._refers_to_instances = set()
         self._fetched_from: dict = {}
 
+        # collection : collection that is a collection of self
+        self._is_collection_child: Dict[Collection, Collection] = {}
+        self._is_collection_parent: Dict[Collection, Collection] = {}
+        
         # initialize the default values
         self._default_values = {}
         for name, factory in object_type._default_factories.items():
@@ -198,6 +202,18 @@ class OuterProxy:
 
         object_trace(f"merging {type(a).__name__} [{a.title_string} | {a.id}] with {type(b).__name__} [{b.title_string} | {b.id}]")
         
+        for collection, child_collection in b._inner._is_collection_child.items():
+            try:
+                collection.children.remove(child_collection)
+            except ValueError:
+                pass
+            
+        for collection, parent_collection in b._inner._is_collection_parent.items():
+            try:
+                collection.parents.remove(parent_collection)
+            except ValueError:
+                pass
+
         old_inner = b._inner
 
         for instance in b._inner._refers_to_instances.copy():

music_kraken/objects/song.py

@@ -93,7 +93,7 @@ class Song(Base):
         self.album_collection.append_object_to_attribute = {
             "song_collection": self,
         }
-        self.main_artist_collection.extend_object_to_attribute = {
+        self.main_artist_collection.contain_given_in_attribute = {
             "main_album_collection": self.album_collection
         }
         self.feature_artist_collection.append_object_to_attribute = {
@@ -253,7 +253,7 @@ class Album(Base):
         self.artist_collection.append_object_to_attribute = {
             "main_album_collection": self
         }
-        self.artist_collection.extend_object_to_attribute = {
+        self.artist_collection.contain_given_in_attribute = {
             "label_collection": self.label_collection
         }
 

music_kraken/utils/shared.py

@@ -16,7 +16,7 @@ DEBUG = (__stage__ == "dev") and True
 DEBUG_LOGGING = DEBUG and False
 DEBUG_TRACE = DEBUG and True
 DEBUG_OBJECT_TRACE = DEBUG and True
-DEBUG_OBJECT_TRACE_CALLSTACK = DEBUG_OBJECT_TRACE and False
+DEBUG_OBJECT_TRACE_CALLSTACK = DEBUG and True
 DEBUG_YOUTUBE_INITIALIZING = DEBUG and False
 DEBUG_PAGES = DEBUG and False
 DEBUG_DUMP = DEBUG and False

tests/test_collection.py

@@ -86,7 +86,7 @@ class TestCollection(unittest.TestCase):
             ]
         )
 
-        self.assertTrue(artist.id == artist.main_album_collection[0].song_collection[0].main_artist_collection[0].id)
+        self.assertTrue(artist.id == artist.main_album_collection[0].song_collection[0].artist_collection[0].id)
 
     def test_artist_collection_sync(self):
         album_1 = Album(