Add data migration with standard Canvas Placement values (#54)

[ssciolla]

The PR aims to resolve #54.

[zqian]

can we provide a source (from IMS, Canvas, etc) for this list of placement options? I am not sure whether this list in the Canvas LTI course is up-to-date.

[ssciolla]

Maybe @jonespm knows a better source, but he pointed me to the external one I linked to above.

[ssciolla]

Perhaps we can come up with a more refined list from this? https://canvas.instructure.com/doc/api/file.tools_intro.html

[zqian]

The Canvas API doc page should be good.

[ssciolla]

Okay, I updated this list and the link. I took out ones if I didn't see any indication that the were supported. Maybe some of them are for us or in Canvas Commons, per the LTI doc @zqian shared before?

'Assignment Configuration',
'Assignment Menu',
'Course Home Sub Navigation',
'Course Settings Sub Navigation',
'Discussion Menu',
'File Menu',
'Global Navigation',
'Module Menu',
'Post Grades',
'Quiz Menu',
'Tool Configuration',
'Wiki Page Menu'

[jonespm]

Canvas says that the officially documented list of placements is the below list and others are made for "internal use".

• Account Navigation
• Assignment Selection
• Collaboration
• Course Navigation
• Editor button
• Homework Submission
• Link Selection
• Migration Selection
• User Navigation

It looks like this is the list of all possible internal and documented placements

https://github.com/instructure/canvas-lms/blob/ec4f8f6fa6f888612fb111378fe51fd1df9cbcdd/ui/features/external_apps/react/components/ExternalToolPlacementList.js#L33

I think it's fine if we just have the ones that are "officially documented" which looks like your list here in the code.

[jonespm]

One of the reasons I opted to make these configurable verses having an internal list was because Canvas seems to add these on occasion and promotes them to being "officially documented" and used. I'm not sure how often this happens though. Eventually if we implement #9 this will probably need to be reworked.