refactor: use component IDs as keys for slot fill llokup

src/django_components/utils.py

@@ -1,9 +1,7 @@
 import glob
-import random
 from pathlib import Path
-from typing import Callable, List, NamedTuple, Optional
+from typing import List, NamedTuple, Optional
 
-from django.template.base import Node, NodeList
 from django.template.engine import Engine
 
 from django_components.template_loader import Loader
@@ -39,34 +37,15 @@ def search(search_glob: Optional[str] = None, engine: Optional[Engine] = None) -
     return SearchResult(searched_dirs=dirs, matched_files=component_filenames)
 
 
-def walk_nodelist(nodes: NodeList, callback: Callable[[Node], None]) -> None:
-    """Recursively walk a NodeList, calling `callback` for each Node."""
-    node_queue = [*nodes]
-    while len(node_queue):
-        node: Node = node_queue.pop()
-        callback(node)
-        node_queue.extend(get_node_children(node))
-
-
-def get_node_children(node: Node) -> NodeList:
-    """
-    Get child Nodes from Node's nodelist atribute.
-
-    This function is taken from `get_nodes_by_type` method of `django.template.base.Node`.
-    """
-    nodes = NodeList()
-    for attr in node.child_nodelists:
-        nodelist = getattr(node, attr, [])
-        if nodelist:
-            nodes.extend(nodelist)
-    return nodes
+# Global counter to ensure that all IDs generated by `gen_id` WILL be unique
+_id = 0
 
 
 def gen_id(length: int = 5) -> str:
-    # Generate random value
-    # See https://stackoverflow.com/questions/2782229
-    value = random.randrange(16**length)
+    """Generate a unique ID that can be associated with a Node"""
+    # Global counter to avoid conflicts
+    global _id
+    _id += 1
 
-    # Signed hexadecimal (lowercase).
-    # See https://docs.python.org/3/library/stdtypes.html#printf-style-string-formatting
-    return f"{value:x}"
+    # Pad the ID with `0`s up to 4 digits, e.g. `0007`
+    return f"{_id:04}"