the previous approach meant we weren't able to preserve the card state
exactly when cards were in learning, since we didn't record the step
position prior to cards being moved into the filtered deck.
it also meant the answer buttons needed to change depending on state - 4
for cards in learning/review, but 2 when the card is on the final step
or is a review.
instead, in preview mode cards always have 2 buttons: again will repeat
again after a delay, and good immediately removes the card and restores
it to its previous state.
to accomplish this, we use a separate queue #, as the learn count
always needs to have a 1:1 correspondence to the number of cards
commit 79ed57a445 prevented reschedule
on cards in a filtered deck, but it is more user friendly to
automatically move back to the home deck instead. we also don't need
to removeLrn() for review cards, because we're updating type+queue+odue
ourselves
First, burying changes:
- unburying now happens on day rollover, or when manually unburying from
overview screen
- burying is not performed when returning to deck list, or when closing
collection, so burying now must mark cards as modified to ensure sync
consistent
- because they're no longer temporary to a session, make sure we exclude them
in filtered decks in -is:suspended
Sibling spacing changes:
- core behaviour now based on automatically burying related cards when we
answer a card
- applies to reviews, optionally to new cards, and never to cards in the
learning queue (partly because we can't suspend/bury cards in that queue at
the moment)
- this means spacing works consistently in filtered decks now, works on
reviews even when user is late to review, and provides better separation of
new cards
- if burying new cards disabled, we just discard them from the current queue.
an option to set due=ord*space+due would be nicer, but would require
changing a lot of code and is more appropriate for a future major version
change. discarding from queue suffers from the same issue as the new card
cycling in that queue rebuilds may cause cards to be shown close together,
so the default burying behaviour is preferable
- refer to them as 'related cards' rather than 'siblings'
These changes don't require any changes to the database format, so they
should hopefully coexist with older clients without issue.
