Library: Make layers consistently string-typed.

asab/library/item.py

@@ -10,16 +10,16 @@ class LibraryItem:
     Attributes:
         name (str): The absolute path of the Item. It can be directly fed into `LibraryService.read(...)`.
         type (str): Can be either `dir` if the Item is a directory or `item` if Item is of any other type.
-        layer (int): The number of highest layer in which this Item is found. The higher the number, the lower the layer is.
+        layers (list[str]): Identifiers of layers in which this item was found.
+        Examples only as strings, e.g. "0", "1", "0:global", "0:tenant", "0:personal".
         providers (list): List of `LibraryProvider` objects containing this Item.
         disabled (bool): `True` if the Item is disabled, `False` otherwise. If the Item is disabled, `LibraryService.read(...)` will return `None`.
         favorite (bool): True if the Item is marked as a favorite.
         override (int): If `True`, this item is marked as an override for the providers with the same Item name.
-        target (str): Specifies the target context, e.g., "tenant" or "global". Defaults to "global".
     """
     name: str
     type: str
-    layers: typing.List[int]  # Now stores multiple layers in ascending order
+    layers: typing.List[str]
     providers: list
     disabled: bool = False
     favorite: bool = False

asab/library/providers/azurestorage.py

@@ -151,7 +151,7 @@ async def list(self, path: str) -> list:
 			items.append(LibraryItem(
 				name=i.name,
 				type=i.type,
-				layers=[self.Layer],
+				layers=[str(self.Layer)],
 				providers=[self],
 				size=i.size if isinstance(i, AzureItem) else 0  # Include size
 			))

asab/library/providers/filesystem.py

@@ -120,7 +120,7 @@ def _list(self, path: str):
 			items.append(LibraryItem(
 				name=fname,
 				type=ftype,
-				layers=[self.Layer],
+				layers=[str(self.Layer)],
 				providers=[self],
 				size=size  # Include size attribute
 			))
@@ -154,7 +154,7 @@ def _recursive_find(self, path, filename, results):
 			item = LibraryItem(
 				name=path[len(self.BasePath):],  # Store relative path
 				type="item",  # or "dir" if applicable
-				layers=[self.Layer],
+				layers=[str(self.Layer)],
 				providers=[self],
 			)
 			results.append(item)

asab/library/providers/zookeeper.py

@@ -423,7 +423,7 @@ async def process_nodes(self, nodes, base_path, target="global"):
 				else:
 					layer_label = "0:{}".format(target)
 			else:
-				layer_label = self.Layer
+				layer_label = str(self.Layer)
 
 			items.append(LibraryItem(
 				name=fname,
@@ -591,7 +591,6 @@ async def _get_tenants(self) -> typing.List[str]:
 			tenants = []
 		return tenants
 
-
 	async def find(self, filename: str) -> list:
 		"""
 		Recursively search for files ending with a specific name in ZooKeeper nodes, starting from the base path.
@@ -613,14 +612,14 @@ async def _recursive_find(self, path, filename, results):
 		:param results: The list where results are accumulated
 		"""
 		try:
-			children = await self.Zookeeper.get_children(path)
+			children = await self.Zookeeper.get_children(path) or []
 			for child in children:
 				full_path = "{}/{}".format(path, child).rstrip('/')
 				if full_path.endswith(filename):
 					item = LibraryItem(
 						name=full_path[len(self.BasePath):],
 						type="item",  # or "dir" if applicable
-						layers=[self.Layer],
+						layers=[str(self.Layer)],
 						providers=[self],
 					)
 					results.append(item)

asab/library/service.py

@@ -373,7 +373,7 @@ async def _list(self, path, providers):
 				item.disabled = self.check_disabled(item.name)
 				item.favorite = self.check_favorite(item.name)
 				# Use the layers as provided by the provider; if empty, fall back to outer_layer.
-				provider_layers = item.layers if item.layers else [outer_layer]
+				provider_layers = item.layers if item.layers else [str(outer_layer)]
 
 				if item.name in unique_items:
 					existing_item = unique_items[item.name]