the WAL files come from sqlite WAL mode,
they have the same name as the database file with an extra `-wal` suffix.
according to https://sqlite.org/wal.html#the_wal_file ,
the WAL file is part of the persistent state of the database
and should be kept with the database if the database is copied or moved.
* accounts: update EventEmitter on add_account
* accounts: do not lock waiting for EventEmitter in dc_accounts_add_account
Otherwise dc_accounts_add_account blocks until an event arrives on
some existing account.
See https://support.delta.chat/t/discussion-how-to-show-error-states/1363/10 <!-- comment -->
It turns out that it's pretty easy to distinguish between lots of states (currently Error/NotConnected, Connecting…, Getting new messages… and Connected). What's not that easy is distinguishing between an actual error and no network, because if the server just doesn't respond, it could mean that we don't have network or that we are trying ipv6, but only ipv4 works.
**WRT debouncing:**
Sending of EVENT_CONNECTIVITY_CHANGED is not debounced, but emitted every time one of the 3 threads (Inbox, Mvbox and Sentbox) has a network error, starts fetching data, or is done fetching data.
This means that it is emitted:
- 9 times when dc_maybe_network() is called or we get network connection
- 12 times when we lose network connection
Some measurements: dc_get_connectivity() takes a little more than 1ms (in my measurements back in March), dc_get_connectivity_html() takes 10-20ms. This means that it's no immmediate problem to call them very often, might increase battery drain though. For the UI it may be a lot of work to update the title everytime; at least Android is smart enough to update the title only once.
Possible problems (we don't have to worry about them now I think):
- Due to the scan_folders feature, if the user has lots of folders, the state could be "Connecting..." for quite a long time, generally DC seemed a little unresponsive to me because it took so long for "Connecting..." to go away. Telegram has a state "Updating..." that sometimes comes after "Connecting...".
To be done in other PRs:
- Better handle the case that the password was changed on the server and authenticating fails, see https://github.com/deltachat/deltachat-core-rust/issues/1923 and https://github.com/deltachat/deltachat-core-rust/issues/1768
- maybe event debouncing (except for "Connected" connectivity events)
fix https://github.com/deltachat/deltachat-android/issues/1760
in most (all?) UIs, import/export works on an already created account,
so, dc_accounts_import_account() does not really help here -
but adds some noise and confusion
eg. as for the other dc_accounts_t functions,
the corrsponding dc_context_t functions must not be called.
if really a new account is required for import,
it seems to be easier to call add_account() before import.
the default account created by dc_accounts_new()
is annoying when doing a migrate/import account;
in this case, you must not forget to remove the default account.
in between you have two account,
and accounts are swiched.
it seems to be better
to just call add_account() on a new account object as needed.
Switches from rusqlite to sqlx to have a fully async based interface
to sqlite.
Co-authored-by: B. Petersen <r10s@b44t.com>
Co-authored-by: Hocuri <hocuri@gmx.de>
Co-authored-by: link2xt <link2xt@testrun.org>
This removes the proxy via crate::error to depend on anyhow directly.
There is no benefit to this indirection and this makes it simpler to
see which error types are used.
