This partially restores the fix from c9cf2b7f2e
that was removed during the addition of new group consistency at de63527d94
but only for "Member added" messages.
Multiple "Member added" messages happen
when the same QR code is processed multiple times
by multiple devices.
This implements new group consistency algorithm described in
<https://github.com/deltachat/deltachat-core-rust/issues/6401>
New `Chat-Group-Member-Timestamps` header is added
to send timestamps of member additions and removals.
Member is part of the chat if its addition timestamp
is greater or equal to the removal timestamp.
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.
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.
Text parts are using quoted-printable encoding
which takes care of wrapping long lines,
so using format=flowed is unnecessary.
This improves compatibility with receivers
which do not support format=flowed.
Receiving format=flowed messages is still possible, receiver side of
Delta Chat is unchanged.
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.
close#2338
Concat error messages when receiving new ndns.
This PR adds a newline followed by the new NDN error to the error text.
Maybe we should use something more prominent like
```
-----------------------------------------------------------------------
```
or more newlines, but I'm not sure. This maybe has to be tested on a
real device to see what works best.
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.
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.
`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`.
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.
The "Chat-Group-Member-Removed" header is added to ad-hoc group messages as well, so we should check
for its presense before creating an ad-hoc group as we do for DC-style groups.
For purposes of building a message it's better to consider the self-chat as verified. Particularly,
this removes unencrypted name from the "From" header.
Before, if the user deleted a message too quickly after sending, it was deleted only locally. The
fix is to remember for tombstones that the corresponding message should be deleted on the server
too.
Delta Chat -style groups have names w/o prefixes like "Re: " even if the user is added to an already
existing group, so let's remove prefixes from ad-hoc group names too. Usually it's not very
important that the group is a classic email thread existed before, this info just eats up screen
space. Also this way a group name is likely to preserve if the first message was missed.
Before, if `Config::FetchExistingMsgs` is set, existing messages were received with the `InSeen`
state set, but for bots they must be `InFresh` and also `IncomingMsg` events should be emitted for
them so that they are processed by bots as it happens with new messages.
Otherwise it's impossible to remove a member with missing key from a protected group. In the worst
case a removed member will be added back due to the group membership consistency algo.
The "I left the group" message can't be sent to a protected group if some member's key is missing,
in this case we should remain in the group. The problem should be fixed first, then the user may
retry to leave the group.
`!to_ids().is_empty()` check is needed in cases of 1:1 chat creation
because otherwise `to_id` is undefined,
but in case of outgoing group message without recipients
observed on a second device creating a group should be allowed.
Chat-Group-ID always correctly identifies the chat
message was sent to, while In-Reply-To and References
may point to a message that has itself been incorrectly
assigned to a chat.
... and fails if file already exists. The UI should open the file saving dialog, defaulting to
Downloads and original filename, when asked to save the file. After confirmation it should call
dc_msg_save_file().
API now pretends that trashed messages don't exist.
This way callers don't have to check if loaded message
belongs to trash chat.
If message may be trashed by the time it is attempted to be loaded,
callers should use Message::load_from_db_optional.
Most changes are around receive_status_update() function
because previously it relied on loading trashed status update
messages immediately after adding them to the database.
Let's add a 1-minute tolerance to `Params::MemberListTimestamp`.
This adds to the group membership consistency algo the following properties:
- If remote group membership changes were made by two members in parallel, both of them are applied,
no matter in which order the messages are received.
- If we remove a member locally, only explicit remote member additions/removals made in parallel are
allowed, but not the synchronisation of the member list from "To". Before, if somebody managed to
reply earlier than receiving our removal of a member, we added it back which doesn't look good.
Instead, look up the 1:1 chat in `receive_imf::add_parts()`. This is a more generic approach to fix
assigning outgoing reactions to 1:1 chats in the multi-device setup. Although currently both
approaches give the same result, this way we can even implement a "react privately"
functionality. Maybe it sounds useless, but it seems better to have less reaction-specific code.
