There is certain gating logic around pre-reqs, timed exams, etc.
that happen at the SequenceModule level, and should be respected
when rendering descendant XBlocks (like individual problems) that
are in that Sequence. Rather than do a risky refactoring, I'm
keeping that logic where it is and having the render_xblock view
climb up through the ancestor list to call the SequenceModule for
that gating information.
We do _not_ check all descendants (so cousin leaf nodes in the
sequence) for cotent-type-based restrictions because sequences can
become very large (esp. when content libraries are used), and there
is a performance overhead.
If the enclosing sequence is gated in some way, we redirect to the
render_xblock view for that sequence, where hopefully some useful
messaging will be available. This is a stopgap. That redirect
should never happen because we should never be calling the leaf
XBlock for a sequence that is restricted in the MFE. But if somehow
we get there anyway, either by bug or by intrepid user fiddling,
it's better to redirect somewhere that an error _might_ be surfaced
rather than just failing.
This will actually be a little overzealous and lock things down
that should be made visible later. If there's a timed exam and the
exam is completed, it should be the case that content is visible
(just read-only). This commit will block the content before the exam
starts (this is right), open the content while the exam is live
(this is right), but make the content unavailable after the exam
period has finished (this is wrong).
But I am going to go forward with this even knowing it's wrong
because:
1. The render_xblock endpoint should never currently be used in
timed exams in an intentional way. Neither the mobile experience
nor the courseware MFE support it.
2. This fix will address security concerns for creative access
patterns, even if it goes too far.
3. We're going to need to do a lot of work to address both pluggable
access permissions handling and special exams in the courseware
MFE, and a better implementation can be done then.
4. I've had multiple failed attempts to get this to work without
breaking things on and off over the course of weeks, and this
is a relatively low risk way of doing it that doesn't involve
a major refactoring (though the bill for that will come due
when we bring timed exams to the MFE).
The clean-js jake command helps remove all minified js files that get generated using the minify bundle jake command
By running clean-js before running the minify command, we ensure that the tinymce files are consistent after being rebuilt/minified.
This is helpful with multiple app servers that are applying the same changes to the TinyMCE editor
This ensures that no matter on which machine the files are rebuilt, the resulting minified plugin files are consistent among all
