New public API `set_accounts_order` allows setting the order of accounts.
The account order is stored as a list of account IDs in `accounts.toml`
under a new `accounts_order: Vec<u32>` field.
FuturesUnordered is likely buggy and iroh previously switched
to JoinSet in <https://github.com/n0-computer/iroh/pull/1647>.
We also have reports with logs of background_fetch getting
stuck so apparently task cancellation after timeout does not work
as intended with FuturesUnordered.
Targets https://github.com/chatmail/core/issues/6636
Right now the error message is:
> Error: Delta Chat is already running. To use Delta Chat, you must
first close the existing Delta Chat process, or restart your device.
>
> (accounts.lock lock file is already locked)
other suggestions welcome!
- **feat: add `AccountsChanged` and `AccountsItemChanged` events**
- **emit event and add tests**
closes#6106
TODO:
- [x] test receiving synced config from second device
- [x] bug: investigate how to delay the configuration event until it is
actually configured - because desktop gets the event but still shows
account as if it was unconfigured, maybe event is emitted before the
value is written to the database?
- [x] update node bindings constants
it was used by iOS to know when a background fetch was complete;
meanwhile the superiour `dc_accounts_background_fetch()` is used for
that.
there is still the corresponding context function `dc_all_work_done()`,
this not used by any UI as well, however, it is in use by a python
tests.
not sure, what to do with it, at a first glance, the test still seems
useful.
Even though r2d2 connection pool is removed,
deleting accounts still fails in Windows CI.
This reverts commit e88f21c010.
`try_many_times` documentation is modified to explain
why the workaround is still needed.
Opening the same account (context) from multiple processes is dangerous, can result in duplicate
downloads of the same message etc. Same for account manager, attempts to modify the same
accounts.toml even if done atomically with may result in corrupted files as atomic replacement
procedure does not expect that multiple processes may write to the same temporary file.
accounts.toml cannot be used as a lockfile because it is replaced during atomic update. Therefore, a
new file next to accounts.toml is needed to prevent starting second account manager in the same
directory.
But iOS needs to be able to open accounts from multiple processes at the same time. This is required
as the "share-to-DC extension" is a separate process by iOS design -- this process may or may not be
started while the main app is running. Accounts are not altered however by this extension, so let's
add to the `Accounts::new()` constructor an `rdwr` parameter which allows to read the accounts
config w/o locking the lockfile.
To handle backups the UIs have to make sure they do stop the IO
scheduler and also don't accidentally restart it while working on it.
Since they have to call start_io from a bunch of locations this can be
a bit difficult to manage.
This introduces a mechanism for the core to pause IO for some time,
which is used by the imex function. It interacts well with other
calls to dc_start_io() and dc_stop_io() making sure that when resumed
the scheduler will be running or not as the latest calls to them.
This was a little more invasive then hoped due to the scheduler. The
additional abstraction of the scheduler on the context seems a nice
improvement though.
