feat: Adds Video XBlock extracted from edx-platform repository

Author: farhan

.gitignore

@@ -23,6 +23,10 @@ __pycache__
 /lib
 /lib64
 
+# node
+node_modules
+npm-debug.log
+
 # Installer logs
 pip-log.txt
 

requirements/base.in

@@ -8,3 +8,7 @@ nh3
 oauthlib
 openedx-django-pyfs
 XBlock
+# TODO: Run python reqs update
+edx-opaque-keys
+edx-django-utils>=5.14.1
+edxval

xblocks_contrib/utils/__init__.py

@@ -0,0 +1,26 @@
+def display_name_with_default(block):
+    """
+    Calculates the display name for a block.
+
+    Default to the display_name if it isn't None, else fall back to creating
+    a name based on the URL.
+
+    Unlike the rest of this module's functions, this function takes an entire
+    course block/overview as a parameter. This is because a few test cases
+    (specifically, {Text|Image|Video}AnnotationModuleTestCase.test_student_view)
+    create scenarios where course.display_name is not None but course.location
+    is None, which causes calling course.url_name to fail. So, although we'd
+    like to just pass course.display_name and course.url_name as arguments to
+    this function, we can't do so without breaking those tests.
+
+    Note: This method no longer escapes as it once did, so the caller must
+    ensure it is properly escaped where necessary.
+
+    Arguments:
+        block (XModuleMixin|CourseOverview|BlockStructureBlockData):
+            Block that is being accessed
+    """
+    return (
+        block.display_name if block.display_name is not None
+        else block.scope_ids.usage_id.block_id.replace('_', ' ')
+    )