Currently, a lot of our build variables that are defined at
configuration time, are spread out across the code base, often declared
as `extern` which can break when moving around sections of the code
across files.
This commit introduces a "Config" namespace which basically maps to the
definitions in `config.h`, but allows us to properly access them too
from the Vala source code.
By doing so, it helps us to more explicitly see where we rely on a
build variable from this file (which should be obvious from the `Config'
namespace).
To make it ourselves a bit easier in Meson too, we can declare an
internal dependency, which helps ensure that we pull in the dependency
where needed.
Ensure OR is actually used to separate disjuncts, don't prefix match
non-stemmed terms when a stemmed version exists or when EXACT is
specified. Ensure column is correctly specified per disjunct.
Engine mocks don't need to be in the `Geary` namespace, and including
them there makes it difficult to use them in client tests, so put them
all in their own name-space and corresponding directory.
The `SpecialFolderType` was somewhat mis-named, since the special use
does not (in most cases) confer any special type, rather it's simply
defines what a particular folder is used /for/.
As such, rename the enum to to `Geary.Folder.SpecialUse`, moving it in
to the `Folder` class, since it relates specifically to folders, also
rename `Folder::special_folder_type` and
`Folder::special_folder_type_changed` reflect the above and not
duplicate the type name, and similarly rename
`Account::folders_special_type`.
Update the many call sites.
Remove functions that have as-convenient methods in up-tp-date Gee,
rename ::get_first to ::first so it reads better and add API docs,
replace ::to_array_list with ::copy, since that's what's actually
needed.
Add a ContactHarvester arg to ImapDB.Folder.create_or_merge_email and
call it on the resulting email. Add and update a new harvester
property to MinimalFolder and pass that in as needed.
Replaces harvesting code in ImapDB code so as to be stand-alone and
reusable. Implement harvesting policy to only harvest from a set of
whitelisted special folder types (so junk and trash is not harvested)
and only harvest valid, non-spoofed, addresses.
