Instead of passing in user config and data base dirs to the Engine from
the app, then pulling them out from the engine again from the app, just
store them in AccountManager, since that's where they are needed.
* src/client/accounts/account-manager.vala (AccountManager): Store user
config and data base dirs directly rather than getting them from the
engine. Split account directory creation out into a separate method so
they aren't re-made every time the config is saved.
* src/engine/api/geary-engine.vala (Engine): Remove user config and data
dir properties and open_async args. Update call sites and unit tests.
* src/client/application/geary-controller.vala (GearyController): Chase
AccountManager and Engine API changes. Ensure account dirs are created
when an new account is added.
* src/engine/api/geary-account-information.vala (AccountInformation):
Explicitly track copies rather relying on account dirs being
null. Don't require dirs be set in the default ctor, since they won't
be known, provide a method for updating them later on instead.
* test/api/*.vala: Renamed files that contained mock objects to *-mock.vala,
not *-test.vala.
* test/testcase.vala: Renamed to test-case.vala for consistency, remove
TestCase class from Gee package since that's really not true. Clean up
code for consistency.
* test/meson.build, test/CMakeLists.txt: Split TestCase compilation out
into a separate test lib.
This generalises the approach used to execute the flag watcher and
background sync, provides a high-level means of managing local and remote
operations, and provides a means of compartmentalising operation-specific
code.
* src/engine/imap-engine/imap-engine-account-operation.vala
(AccountProcessor): Interface for denoting classes that implements some
account-specific operation.
* src/engine/imap-engine/imap-engine-account-processor.vala
(AccountProcessor): Class to manage the operation queue and execute
operations.
* src/engine/imap-engine/imap-engine-generic-account.vala
(GenericAccount): Create and manage an instance of AccountProcessor,
add queue_operation method to allow operations to be queued.
