feat: LibraryCollectionKey and LibraryCollectionLocator created [FC-0062]

CHANGELOG.rst

@@ -1,3 +1,7 @@
+# 2.11.0
+
+* Added LibraryCollectionKey and LibraryCollectionLocator
+
 # 2.10.0
 
 * Unpin pymongo and upgrade to the latest available version.

opaque_keys/__init__.py

@@ -14,7 +14,7 @@
 from stevedore.enabled import EnabledExtensionManager
 from typing_extensions import Self  # For python 3.11 plus, can just use "from typing import Self"
 
-__version__ = '2.10.0'
+__version__ = '2.11.0'
 
 
 class InvalidKeyError(Exception):

opaque_keys/edx/keys.py

@@ -4,12 +4,16 @@
 from __future__ import annotations
 import json
 from abc import abstractmethod
+from typing import TYPE_CHECKING
 import warnings
 
 from typing_extensions import Self  # For python 3.11 plus, can just use "from typing import Self"
 
 from opaque_keys import OpaqueKey
 
+if TYPE_CHECKING:
+    from opaque_keys.edx.locator import LibraryLocatorV2
+
 
 class LearningContextKey(OpaqueKey):  # pylint: disable=abstract-method
     """
@@ -89,6 +93,23 @@
         raise NotImplementedError()
 
 
+class LibraryCollectionKey(OpaqueKey):
+    """
+    An :class:`opaque_keys.OpaqueKey` identifying a particular Library Collection object.
+    """
+    KEY_TYPE = 'collection_key'
+    library_key: LibraryLocatorV2
+    collection_id: str
+    __slots__ = ()
+
+    @property
+    def org(self) -> str | None:  # pragma: no cover
+        """
+        The organization that this collection belongs to.
+        """
+        raise NotImplementedError()
+
+
 class DefinitionKey(OpaqueKey):
     """
     An :class:`opaque_keys.OpaqueKey` identifying an XBlock definition.

opaque_keys/edx/locator.py

@@ -15,7 +15,8 @@
 from typing_extensions import Self  # For python 3.11 plus, can just use "from typing import Self"
 
 from opaque_keys import OpaqueKey, InvalidKeyError
-from opaque_keys.edx.keys import AssetKey, CourseKey, DefinitionKey, LearningContextKey, UsageKey, UsageKeyV2
+from opaque_keys.edx.keys import AssetKey, CourseKey, DefinitionKey, \
+    LearningContextKey, UsageKey, UsageKeyV2, LibraryCollectionKey
 
 log = logging.getLogger(__name__)
 
@@ -1620,3 +1621,58 @@
         # HTML5 allows ID values to contain any characters at all other than spaces.
         # These key types don't allow spaces either, so no transform is needed.
         return str(self)
+
+
+class LibraryCollectionLocator(CheckFieldMixin, LibraryCollectionKey):
+    """
+    When serialized, these keys look like:
+        lib-collection:org:lib:collection-id
+    """
+    CANONICAL_NAMESPACE = 'lib-collection'
+    KEY_FIELDS = ('library_key', 'collection_id')
+    library_key: LibraryLocatorV2
+    collection_id: str
+
+    __slots__ = KEY_FIELDS
+    CHECKED_INIT = False
+
+    # Allow collection IDs to contian unicode characters
+    COLLECTION_ID_REGEXP = re.compile(r'^[\w\-.]+$', flags=re.UNICODE)
+
+    def __init__(self, library_key: LibraryLocatorV2, collection_id: str):
+        """
+        Construct a CollectionLocator
+        """
+        if not isinstance(library_key, LibraryLocatorV2):
+            raise TypeError("library_key must be a LibraryLocatorV2")
+
+        self._check_key_string_field("collection_id", collection_id, regexp=self.COLLECTION_ID_REGEXP)
+        super().__init__(
+            library_key=library_key,
+            collection_id=collection_id,
+        )
+
+    @property
+    def org(self) -> str | None:  # pragma: no cover
+        """
+        The organization that this collection belongs to.
+        """
+        return self.library_key.org
+
+    def _to_string(self) -> str:
+        """
+        Serialize this key as a string
+        """
+        return ":".join((self.library_key.org, self.library_key.slug, self.collection_id))
+
+    @classmethod
+    def _from_string(cls, serialized: str) -> Self:
+        """
+        Instantiate this key from a serialized string
+        """
+        try:
+            (org, lib_slug, collection_id) = serialized.split(':')
+            library_key = LibraryLocatorV2(org, lib_slug)
+            return cls(library_key, collection_id)
+        except (ValueError, TypeError) as error:
+            raise InvalidKeyError(cls, serialized) from error

opaque_keys/edx/tests/test_collection_locators.py

@@ -0,0 +1,64 @@
+"""
+Tests of LibraryCollectionLocator
+"""
+import ddt
+from opaque_keys import InvalidKeyError
+from opaque_keys.edx.tests import LocatorBaseTest
+from opaque_keys.edx.locator import LibraryCollectionLocator, LibraryLocatorV2
+
+
+@ddt.ddt
+class TestLibraryCollectionLocator(LocatorBaseTest):
+    """
+    Tests of :class:`.LibraryCollectionLocator`
+    """
+    @ddt.data(
+        "org/lib/id/foo",
+        "org/lib/id",
+        "org+lib+id",
+        "org+lib+",
+        "org+lib++id@library",
+        "org+ne@t",
+        "per%ent+sign",
+    )
+    def test_coll_key_from_invalid_string(self, coll_id_str):
+        with self.assertRaises(InvalidKeyError):
+            LibraryCollectionLocator.from_string(coll_id_str)
+
+    def test_coll_key_constructor(self):
+        org = 'TestX'
+        lib = 'LibraryX'
+        code = 'test-problem-bank'
+        library_key = LibraryLocatorV2(org=org, slug=lib)
+        coll_key = LibraryCollectionLocator(library_key=library_key, collection_id=code)
+        library_key = coll_key.library_key
+        self.assertEqual(str(coll_key), "lib-collection:TestX:LibraryX:test-problem-bank")
+        self.assertEqual(coll_key.org, org)
+        self.assertEqual(coll_key.collection_id, code)
+        self.assertEqual(library_key.org, org)
+        self.assertEqual(library_key.slug, lib)
+
+    def test_coll_key_constructor_bad_ids(self):
+        library_key = LibraryLocatorV2(org="TestX", slug="lib1")
+
+        with self.assertRaises(ValueError):
+            LibraryCollectionLocator(library_key=library_key, collection_id='usage-!@#{$%^&*}')
+        with self.assertRaises(TypeError):
+            LibraryCollectionLocator(library_key=None, collection_id='usage')
+
+    def test_coll_key_from_string(self):
+        org = 'TestX'
+        lib = 'LibraryX'
+        code = 'test-problem-bank'
+        str_key = f"lib-collection:{org}:{lib}:{code}"
+        coll_key = LibraryCollectionLocator.from_string(str_key)
+        library_key = coll_key.library_key
+        self.assertEqual(str(coll_key), str_key)
+        self.assertEqual(coll_key.org, org)
+        self.assertEqual(coll_key.collection_id, code)
+        self.assertEqual(library_key.org, org)
+        self.assertEqual(library_key.slug, lib)
+
+    def test_coll_key_invalid_from_string(self):
+        with self.assertRaises(InvalidKeyError):
+            LibraryCollectionLocator.from_string("this-is-a-great-test")

setup.py

@@ -153,6 +153,9 @@ def get_version(*file_paths):
         ],
         'block_type': [
             'block-type-v1 = opaque_keys.edx.block_types:BlockTypeKeyV1',
-        ]
+        ],
+        'collection_key': [
+            'lib-collection = opaque_keys.edx.locator:LibraryCollectionLocator',
+        ],
     }
 )