Additionally:
- Add typehints for stronger typing, and use strict comparison in the
callers
- Use MIN instead of sorting, as the former is optimized by the DBMS;
sorting was also happening on the wrong key, i.e. afh_timestamp, as
opposed to afh_id
Change-Id: I631772fdfeb510b0bc8b582b84bcf2533d7bc097
So we can use DI in all generators. Some improvements were deliberately
omitted, e.g. injecting more services and relaxing User/Title to
UserIdentity/LinkTarget, and they'll be included in a subsequent commit.
Depends-On: I1f351071ef2b0b7c80e91407a9c3bb17be293044
Depends-On: Ie71740fac35a86f8fe03023080ae8ca08671243d
Depends-On: I589a0e1c2c5891070ab82cd5adfd9cedec19e67d
Change-Id: I92ef0abd5e45b672e6f297a71b3c2c345d56f136
This makes VariableHolder a true value object, and introduces a
stateless service, VariableManager, to operate on it.
Note, in theory, this new service is still cyclically coupled with
LazyVariableComputed. However, it's now two stateless service being
coupled, not two smart/god value objects, so we've still earned
something. For now, the dependency is hidden by using a callback. Some
alternatives for that are mentioned in a code comment.
Bug: T261069
Change-Id: I2f2c84c8e91472ba36084a8bbb4a923f6e04354b
