The only way to access the legacy courseware is now through the
Studio preview feature (and at some point, when the MFE supports a
preview mode, we can then remove even that).
This drops the courseware.use_legacy_frontend waffle.
The Referrer header from the MFE hosted on a different origin does not
include the path, so make sure to ignore the path portion of the
learning MFE base URL when determining whether the request is coming
from the new MFE or the old courseware view.
The /jump_to/ LMS endpoint is used in a number of places
to direct users to courseware. It currently only redirects to
Legacy courseware URLs, which then conditionally may
redirect to the Learning MFE.
Two issues with this:
1. Performance Impact: In most cases, going to Legacy first
is just an extra redirect.
2. Confusion for Privileged Users: Neither course nor global
staff are auto-redirected from the Legacy experience to the
MFE. Thus, these priviliged users confusingly never see the
MFE by default; they must always manually click into it.
This commit makes it so that /jump_to/ directs
users to whatever the default courseware experience is
for them. For staff of courses active in the new experience,
this will impact (at a minimum) the "View Live"
links in Studio, all links on the old and new LMS
course outline, and the "Resume" links on the course
dashboard. Learners should see no difference other than
a performance improvement when following courseware links
from the LMS.
This also adds an optional 'experience=[legacy|new]'
query param to /jump_to/, allowing us to specifically
generate Legacy courseware URLs for the
"View in Legacy Experience" tool.
TNL-7796
Centralize the logic for choosing between
MFE and Legacy-frontend courseware within
three new functions:
* courseware_mfe_is_active
* courseware_mfe_is_visible
* courseware_legacy_is_visible
This allows us to create another new function:
* get_courseware_url
which can be called anywhere in LMS/Studio
to get the canonical URL to courseware
content (whether it be MFE or Legacy).
In future commits we we begin using
get_courseware_url throughout the platform.
TNL-7796
In preparation for switching LMS/Studio over
from serving legacy courseware URLs in certain
places (for example, resume_course_url) to serving
learning micro-frontend URLs.
TNL-7796
