Firstly, this abstract away behavior in the mod download models that can
also be applied to other types of resources into a superclass, allowing
other resource types to be implemented without so much code duplication.
For that, this also generalizes the APIs used (currently, ModrinthAPI
and FlameAPI) to be able to make requests to other types of resources.
It also does a general cleanup of both of those. In particular, this
makes use of std::optional instead of invalid values for errors and,
well, optional values :p
This is a squash of some commits that were becoming too interlaced
together to be cleanly separated.
Signed-off-by: flow <flowlnlnln@gmail.com>
Prevents a massive inload of Scrumplex ditto's :)
I didn't add it to every file modified in this PR because the other
changes are pretty minor, and would explode the diff of the PR. I hope
that's not a problem O_O
This makes ModDownloadTask into a SequentialTask with 2 subtasks:
Downloading the mod files and updating the index with the new
information.
The index updating is done first so that, in the future, we
can prompt the user before download if, for instance, we discover
there's another version already installed.
Previously, we used a unique_ptr to a ModDownloadTask to keep track of
the selected mod to download when we accepted the dialog.
In order to allow multiple mods to be selected at once for download,
this has been changed to a QHash where the key is the mods name (since
it doesn't seem right to allow for multiple versions of the same mod to
be downloaded at once), and the value is a pointer to the corresponding
ModDownloadTask.
