feat: Add tags count for v2 library components (#33979)

openedx/core/djangoapps/content_libraries/api.py

@@ -134,6 +134,7 @@ from xmodule.library_root_xblock import LibraryRoot as LibraryRootV1
 from xmodule.modulestore import ModuleStoreEnum
 from xmodule.modulestore.django import modulestore
 from xmodule.modulestore.exceptions import ItemNotFoundError
+from openedx_tagging.core.tagging import api as tagging_api
 
 from . import tasks
 
@@ -234,6 +235,7 @@ class LibraryXBlockMetadata:
     def_key = attr.ib(type=BundleDefinitionLocator)
     display_name = attr.ib("")
     has_unpublished_changes = attr.ib(False)
+    tags_count = attr.ib(0)
 
 
 @attr.s
@@ -636,6 +638,15 @@ def delete_library(library_key):
         raise
 
 
+def _get_library_component_tags_count(library_key) -> dict:
+    """
+    Get the count of tags that are applied to each component in this library, as a dict.
+    """
+    # Create a pattern to match the IDs of the library components, e.g. "lb:org:id*"
+    library_key_pattern = str(library_key).replace("lib:", "lb:", 1) + "*"
+    return tagging_api.get_object_tag_counts(library_key_pattern, count_implicit=True)
+
+
 def get_library_blocks(library_key, text_search=None, block_types=None) -> list[LibraryXBlockMetadata]:
     """
     Get the list of top-level XBlocks in the specified library.
@@ -646,6 +657,7 @@ def get_library_blocks(library_key, text_search=None, block_types=None) -> list[
     ref = ContentLibrary.objects.get_by_key(library_key)  # type: ignore[attr-defined]
     lib_bundle = LibraryBundle(library_key, ref.bundle_uuid, draft_name=DRAFT_NAME)
     usages = lib_bundle.get_top_level_usages()
+    library_component_tags_count = _get_library_component_tags_count(library_key)
 
     for usage_key in usages:
         # For top-level definitions, we can go from definition key to usage key using the following, but this would
@@ -663,6 +675,7 @@ def get_library_blocks(library_key, text_search=None, block_types=None) -> list[
                 "def_key": def_key,
                 "display_name": display_name,
                 "has_unpublished_changes": lib_bundle.does_definition_have_unpublished_changes(def_key),
+                "tags_count": library_component_tags_count.get(str(usage_key), 0),
             })
 
     return [
@@ -671,6 +684,7 @@ def get_library_blocks(library_key, text_search=None, block_types=None) -> list[
             def_key=item['def_key'],
             display_name=item['display_name'],
             has_unpublished_changes=item['has_unpublished_changes'],
+            tags_count=item['tags_count']
         )
         for item in metadata
     ]

openedx/core/djangoapps/content_libraries/serializers.py

@@ -117,6 +117,7 @@ class LibraryXBlockMetadataSerializer(serializers.Serializer):
     # When creating a new XBlock in a library, the slug becomes the ID part of
     # the definition key and usage key:
     slug = serializers.CharField(write_only=True)
+    tags_count = serializers.IntegerField(read_only=True)
 
 
 class LibraryXBlockTypeSerializer(serializers.Serializer):