Currently broadcast lists creation is synced across devices. Groups creation, in some means, too --
on a group promotion by a first message. Otoh, messages deletion is synced now as well. So, for
feature-completeness, sync chats deletion too.
Add "Chat-Group-Name-Timestamp" message header and use the last-write-wins logic when updating group
names (similar to group member timestamps). Note that if the "Chat-Group-Name-Changed" header is
absent though, we don't add a system message (`MsgGrpNameChangedBy`) because we don't want to blame
anyone.
Users report that in a setup with Android (1.50.4 from F-Droid) and Desktop (1.48.0 x86_64 .deb
release) and chatmail account `bcc_self` was reverted to 0 on Android, resulting in messages sent
from Android not appearing on Desktop. This might happen because of the bug in migration #127, it
doesn't handle `delete_server_after` > 1. Existing chatmail configurations having
`delete_server_after` != 1 ("delete at once") should get `bcc_self` enabled, they may be multidevice
configurations:
- Before migration #127, `delete_server_after` was set to 0 upon a backup export, but
then `bcc_self` is enabled instead (whose default is changed to 0 for chatmail).
- The user might set `delete_server_after` to a value other than 0 or 1 when that was
possible in UIs.
So let's add another migration fixing this. But still don't check `is_chatmail` for simplicity.
Using `repeat_vars()` to generate SQL statements led to some of them having more than
`SQLITE_MAX_VARIABLE_NUMBER` parameters and thus failing, so let's get rid of this pattern. But
let's not optimise for now and just repeat executing an SQL statement in a loop, all the places
where `repeat_vars()` is used seem not performance-critical and containing functions execute other
SQL statements in loops. If needed, performance can be improved by preparing a statement and
executing it in a loop. An exception is `lookup_chat_or_create_adhoc_group()` where `repeat_vars()`
can't be replaced with a query loop, there we need to replace the `SELECT` query with a read
transaction creating a temporary table which is used to perform the SELECT query then.
Before, `Chat::why_cant_send()` just returned `CantSendReason` after the first unsuccessful check
allowing to handle the result and finally send the message if the condition is acceptable in which
case the remaining checks are not done. This didn't result in any bugs, but to make the code more
robust let's add a functional parameter to filter failed checks without early return.
First of all, chatmail servers normally forbid to send unencrypted mail, so if we know the peer's
key, we should encrypt to it. Chatmail setups have `E2eeEnabled=1` by default and this isn't
possible to change in UIs, so this change fixes the chatmail case. Additionally, for chatmail, if a
peer has `EncryptPreference::Reset`, let's handle it as `EncryptPreference::NoPreference` for the
reason above. Still, if `E2eeEnabled` is 0 for a chatmail setup somehow, e.g. the user set it via
environment, let's assume that the user knows what they do and ignore `IsChatmail` flag.
NB:
- If we don't know the peer's key, we should try to send an unencrypted message as before for a
chatmail setup.
- This change doesn't remove the "majority rule", but now the majority with
`EncryptPreference::NoPreference` can't disable encryption if the local preference is `Mutual`. To
disable encryption, some peer should have a missing peerstate or, for the non-chatmail case, the
majority should have `EncryptPreference::Reset`.
Change `BccSelf` default to 0 for chatmail configurations and enable it upon a backup export. As for
`DeleteServerAfter` who was set to 0 upon a backup export before, make its default dependent on
`BccSelf` for chatmail. We don't need `BccSelf` for chatmail by default because we assume
single-device use. Also `BccSelf` is needed for "classic" email accounts even if `DeleteServerAfter`
is set to "immediately" to detect that a message was sent if SMTP server is slow to respond and
connection is lost before receiving the status line which isn't a problem for chatmail servers.
Even if UIs don't call `Message::force_sticker()`, they don't want conversions of `Sticker` to
`Image` if it's obviously not an image, particularly, has non-image extension. Also UIs don't want
conversions of `Sticker` to anything other than `Image`, so let's keep the `Sticker` viewtype in
this case.
In multi-device case `vg-request-with-auth` left on IMAP may result in situation when Bob joins the
group, then leaves it, then second Alice device comes online and processes `vg-request-with-auth`
again and adds Bob back. So we should IMAP-delete `vg-request-with-auth`. Another device will know
the Bob's key from Autocrypt-Gossip. It's not a problem if Alice loses state (restores from an old
backup) or goes offline for long before sending `vg-member-added`, anyway it may not be delivered by
the server, rather Bob should retry sending SecureJoin messages as he is a part which wants to join,
so let's not solve this for now.
Add a `create` param to `select_with_uidvalidity()` instead of always trying to create the folder
and return `Ok(false)` from it if the folder doesn't exist and shouldn't be created, and handle this
in `store_seen_flags_on_imap()` by just removing "jobs" from the `imap_markseen` table. Also don't
create the folder in other code paths where it's not necessary.
This is to avoid revalidating HTTP cache too frequently (and have many parallel revalidation tasks)
if revalidation fails or the HTTP request takes some time. The stale period >= 1 hour, so 1 more
minute won't be a problem.
It was called from `receive_imf` when an outgoing message is received. But
`Imap::fetch_new_messages()` already calls `chat::mark_old_messages_as_noticed()` which does the job
better (per-message).
UIs may want to display smth like "Transferring..." after "Establishing connection between
devices..." on nonzero progress. Before, progress on the receiver side was starting with 2 after
receiving enough data.
This fixes the HTML display of messages containing forwarded messages. Before, forwarded messages
weren't rendered in HTML and if a forwarded message is long and therefore truncated in the chat, it
could only be seen in the "Message Info". In #4462 it was suggested to display "Show Full
Message..." for each truncated message part and save to `msgs.mime_headers` only the corresponding
part, but this is a quite huge change and refactoring and also it may be good that currently we save
the full message structure to `msgs.mime_headers`, so i'd suggest not to change this for now.
Otherwise the "Show Full Message..." button appears somewhere in the middle of the multipart
message, e.g. after a text in the first message bubble, but before a text in the second
bubble. Moreover, if the second/n-th bubble's text is shortened (ends with "[...]"), the user should
scroll up to click on "Show Full Message..." which doesn't look reasonable. Scrolling down looks
more acceptable (e.g. if the first bubble's text is shortened in a multipart message).
I'd even suggest to show somehow that message bubbles belong to the same multipart message, e.g. add
"[↵]" to the text of all bubbles except the last one, but let's discuss this first.
A user reported to me that after they left a group, they were implicitly readded, but there's no any
readdition message, so currently it looks in the chat like leaving it has no effect, just new
messages continue to arrive. The readdition probably happened because some member didn't receive the
user's self-removal message, anyway, at least there must be a message that the user is readded, even
if it isn't known by whom.
A NDN may arrive days after the message is sent when it's already impossible to tell which message
wasn't delivered looking at the "Failed to send" info message, so it only clutters the chat and
makes the user think they tried to send some message recently which isn't true. Moreover, the info
message duplicates the info already displayed in the error message behind the exclamation mark and
info messages do not point to the message that is failed to be sent.
Moreover it works rarely because `mimeparser.rs` only parses recipients from `x-failed-recipients`,
so it likely only works for Gmail. Postfix does not add this `X-Failed-Recipients` header. Let's
remove this parsing too. Thanks to @link2xt for pointing this out.
This fixes HTML display of truncated (long) sent messages ("Show full message" in UIs). Before,
incorrect HTML was stored (with missing line breaks etc.) for them. Now stored plaintext is
formatted to HTML upon calling `MsgId::get_html()` and this results in the same HTML as on a
receiver side.
A sync message for accepting or blocking a 1:1 chat may arrive before the first message from the
contact, when it does not exist yet. This frequently happens in non-chatmail accounts that have
moving to the DeltaChat folder disabled because Delta Chat unconditionally uploads sync messages to
the DeltaChat folder. Let's create a hidden contact in this case and a 1:1 chat for it.
If a message partially downloaded before is already IMAP-seen upon a full download, it should be
updated to `InSeen`. OTOH if it's not IMAP-seen, but already `InNoticed` locally, its state should
be preserved. So we take the maximum of two states.
This fixes sending MDNs for big messages when they are downloaded and really seen. Otherwise MDNs
are not sent for big encrypted messages because they "don't want MDN" until downloaded.
Add a test on what happens currently when apps call `markseen_msgs()` for not downloaded encrypted
messages. Such messages are marked as seen, but MDNs aren't sent for them. Also currently when such
a message is downloaded, it remains `InSeen` despite the full content hasn't yet been seen by the
user.
There were many cases in which "member added/removed" messages were added to chats even if they
actually do nothing because a member is already added or removed. But primarily this fixes a
scenario when Alice has several devices and shares an invite link somewhere, and both their devices
handle the SecureJoin and issue `ChatGroupMemberAdded` messages so all other members see a
duplicated group member addition.
3f9242a saves name from all QR codes to `name` (i.e. manually edited name), but for SecureJoin QR
codes the name should be saved to `authname` because such QR codes are generated by the
inviter. Other QR codes may be generated locally and not only by Delta Chat, so the name from them
mustn't go to `authname` and be revealed to the network or other contacts.
0a63083df7 (fix: Shorten message text in locally sent messages too)
sets `msgs.mime_modified` for long outgoing messages, but forgets to save full message text.
I.e. add the "Messages are guaranteed to be end-to-end encrypted from now on." message and mark the
chat as protected again because no user action is required in this case. There are a couple of
problems though:
- If the program crashes earlier than the protection is restored, the chat remains
protection-broken. But this problem already exists because `ChatId::set_protection()` is never
retried.
- If multiple old unverified messages are received, protection messages added in between don't
annihilate, so they clutter the chat.
Let's always set `Config::NotifyAboutWrongPw` before saving configuration, better if a wrong
password notification is shown once more than not shown at all. It shouldn't be a big problem
because reconfiguration is a manual action and isn't done frequently.
Also for the same reason reset `Config::NotifyAboutWrongPw` only after a successful addition of the
appropriate device message.
If a message from an old contact's setup is received, the outdated Autocrypt header isn't applied,
so the contact verification preserves. But the chat protection breaks because the old message is
sorted to the bottom as it mustn't be sorted over the protection info message (which is `InNoticed`
moreover). Would be nice to preserve the chat protection too e.g. add a "protection broken" message,
then the old message and then a new "protection enabled" message, but let's record the current
behaviour first.
Received messages shouldn't mingle with just sent ones and appear somewhere in the middle of the
chat, so we go after the newest non fresh message.
But if a received outgoing message is older than some `InSeen` message, better sort the received
message purely by timestamp (this is an heuristic in order not to break the Gmail-like case
simulated by `verified_chats::test_old_message_4()`). We could place the received message just
before that `InSeen` message, but anyway the user may not notice it.
At least this fixes outgoing messages sorting for shared accounts where messages from other devices
should be sorted the same way as incoming ones.
Otherwise backups exported from the current core and imported in versions < 1.144.0 have QR codes
not working. The breaking change which removed the column is
5a6efdff44.
Before file extensions were also limited to 32 chars, but extra chars in the beginning were just cut
off, e.g. "file.with_lots_of_characters_behind_point_and_double_ending.tar.gz" was considered to
have an extension "d_point_and_double_ending.tar.gz". Better to take only "tar.gz" then.
Also don't include whitespace-containing parts in extensions. File extensions generally don't
contain whitespaces.
This should fix ad-hoc groups splitting when messages are fetched out of order from different
folders or otherwise reordered, or some messages are missing so that the messages reference chain is
broken, or a member was removed from the thread and readded later, etc. Even if this way two
different threads are merged, it looks acceptable, having many threads with the same name/subject
and members isn't a common use case.
Why:
- With IMAP APPEND we can upload messages directly to the DeltaChat folder (for non-chatmail
accounts).
- We can set the `\Seen` flag immediately so that if the user has other MUA, it doesn't alert about
a new message if it's just a sync message (there were several such reports on the support
forum). Though this also isn't useful for chatmail.
- We don't need SMTP envelope and overall remove some overhead on processing sync messages.
Groups promotion to other devices and QR code tokens synchronisation are not synchronised processes,
so there are reasons why a QR code token may arrive earlier than the first group message:
- We are going to upload sync messages via IMAP while group messages are sent by SMTP.
- If sync messages go to the mvbox, they can be fetched earlier than group messages from Inbox.
`chat::create_send_msg_jobs()` already handles `Config::BccSelf` as needed. The only exception is
Autocrypt setup messages. This change unifies the logic for the self-chat and groups only containing
`SELF`.
This makes possible to schedule one more sending of the message, the existing jobs are not
cancelled. Otherwise it's complicated to implement bots that resend messages when a new member joins
the group.
And also:
- Make it `pub(crate)`.
- Use it in `should_request_mdns()` as using `config_exists()` there isn't correct because the
latter doesn't look at environment.
I.e. to all messages except "v{c,g}-request" as they sent out on a QR code scanning which is a
manual action and "vg-member-added" as formally this message is auto-submitted, but the member
addition is a result of an explicit user action. Otherwise it would be strange to have the
Auto-Submitted header in "member-added" messages of verified groups only.
`imap::Session::store_seen_flags_on_imap()` handles messages from multiple folders, so not being
able to select one folder mustn't fail the whole function.
- To avoid receiving undecryptable MDNs by bots and replying to them if the bot's key changes.
- MDNs from bots don't look useful in general, usually the user expects some reply from the bot, not
just that the message is read.
Recently there are many questions on the Delta Chat forum why some unexpected encrypted messages
appear in Inbox. Seems they are mainly sync messages, though that also obviously happens to
SecureJoin messages. Anyway, regardless of the `MvboxMove` setting, auto-generated outgoing messages
should be moved to the DeltaChat folder so as not to complicate co-using Delta Chat with other MUAs.
This way we can't get an account with missing blobs if there's not enough disk space.
Also delete already unpacked files if all files weren't unpacked successfully. Still, there are some
minor problems remaining:
- If a db wasn't imported successfully, unpacked blobs aren't deleted because we don't know at which
step the import failed and whether the db will reference the blobs after restart.
- If `delete_and_reset_all_device_msgs()` fails, the whole `import_backup()` fails also, but after a
restart delete_and_reset_all_device_msgs() isn't retried. Probably errors from it should be
ignored at all.
There are many reasons why we may fail to find valid signatures in a message, e.g. we don't yet know
a public key attached in the same message, anyway, if From is forged, the message must be rejected.
Also always take the displayname from encrypted From, even if no valid signatures are found.
iequidoo