feat: add mfe control setting

To use the learning mfe now you also need the setting
`USE_LEGACY_FRONTEND` by tenant.

feat: use function to verify lgacy frontend

feat: improve docstring

style: add type hints

feat: update long line for large conditional

feat: move imports for good practices

move the import for utils and toogles and seems withou problems

lms/djangoapps/course_home_api/toggles.py

@@ -4,6 +4,7 @@
 
 from edx_toggles.toggles import LegacyWaffleFlagNamespace
 
+from lms.lib.utils import use_learning_legacy_frontend
 from openedx.core.djangoapps.waffle_utils import CourseWaffleFlag
 
 WAFFLE_FLAG_NAMESPACE = LegacyWaffleFlagNamespace(name='course_home')
@@ -26,7 +27,10 @@
 
 
 def course_home_legacy_is_active(course_key):
-    return COURSE_HOME_USE_LEGACY_FRONTEND.is_enabled(course_key) or course_key.deprecated
+    return (
+        use_learning_legacy_frontend() and
+        (COURSE_HOME_USE_LEGACY_FRONTEND.is_enabled(course_key) or course_key.deprecated)
+    )
 
 
 def course_home_mfe_progress_tab_is_active(course_key):

lms/djangoapps/courseware/toggles.py

@@ -5,6 +5,7 @@
 from edx_toggles.toggles import LegacyWaffleFlagNamespace, SettingToggle
 from opaque_keys.edx.keys import CourseKey
 
+from lms.lib.utils import use_learning_legacy_frontend
 from openedx.core.djangoapps.waffle_utils import CourseWaffleFlag
 
 # Namespace for courseware waffle flags.
@@ -140,7 +141,7 @@ def courseware_mfe_is_active(course_key: CourseKey) -> bool:
         return False
     # NO: MFE courseware can be disabled for users/courses/globally via this
     #     Waffle flag.
-    if COURSEWARE_USE_LEGACY_FRONTEND.is_enabled(course_key):
+    if use_learning_legacy_frontend() and COURSEWARE_USE_LEGACY_FRONTEND.is_enabled(course_key):
         return False
     # NO: Course preview doesn't work in the MFE
     if in_preview_mode():

lms/lib/utils.py

@@ -2,6 +2,8 @@
 Helper methods for the LMS.
 """
 
+from django.conf import settings
+
 
 def get_parent_unit(xblock):
     """
@@ -44,3 +46,15 @@ def is_unit(xblock):
     """
 
     return get_parent_unit(xblock) is None and xblock.get_parent()
+
+
+def use_learning_legacy_frontend() -> bool:
+    """
+    Checks in django settings if use the learning legacy
+    frontend instead the learning mfe.
+
+    Returns:
+        True if the legacy frontend setting is activated, by default
+        legacy would be activated.
+    """
+    return bool(getattr(settings, "USE_LEARNING_LEGACY_FRONTEND", True))