It was getting difficult to remember which of the normalizers
use None and which don't. So let's try to be a little more consistent
and just use empty sets, etc, so the caller can rely on receiving a
set instead of having to check for None.
Also renamed search parameter authors->author to be more in line
with the singular form of extension.
In order to achieve tag_musts, we break each of the musts down
into separate EXISTS queries for each of the matchable children.
Then we INTERSECT those, and finally do other filtering and
ordering as usual.
Previously they were relative to the directory from which the client
was launched, meaning it usually started with ./_etiquette.
Now it should be more portable and less tight.
By default, photos with searchhidden do not appear in the search
results. This allows a small number of representative images from
a large album to appear in the results, while the rest can be
found on the album's page.
The same effect could be achieved with a tag and forbid search,
but tag searching has much higher cost and it would be more difficult
to implement as a default behavior without requiring lots of special
checks whenever listing tags etc.
So far there is no use case in which get needs to be called with
something other than a Request, and I don't think there will be.
So let's make that part of the design and we can also take the
opportunity to check IP.
It makes sense that anon sessions are still sessions. So @give_token
will ensure that every request has a session. Logged in conditionals
move from 'if session' to 'if session.user'.
Because the function does not do any resolving or converting
to an absolute path, I feel the name 'normalize' is inaccurate
and could be misleading when read. This is more clear.
