Hocuri 0a73c2b7ab feat: Show broadcast channels in their own, proper "Channel" chat (#6901)
Part of #6884 

----

- [x] Add new chat type `InBroadcastChannel` and `OutBroadcastChannel`
for incoming / outgoing channels, where the former is similar to a
`Mailinglist` and the latter is similar to a `Broadcast` (which is
removed)
- Consideration for naming: `InChannel`/`OutChannel` (without
"broadcast") would be shorter, but less greppable because we already
have a lot of occurences of `channel` in the code. Consistently calling
them `BcChannel`/`bc_channel` in the code would be both short and
greppable, but a bit arcane when reading it at first. Opinions are
welcome; if I hear none, I'll keep with `BroadcastChannel`.
- [x] api: Add create_broadcast_channel(), deprecate
create_broadcast_list() (or `create_channel()` / `create_bc_channel()`
if we decide to switch)
  - Adjust code comments to match the new behavior.
- [x] Ask Desktop developers what they use `is_broadcast` field for, and
whether it should be true for both outgoing & incoming channels (or look
it up myself)
- I added `is_out_broadcast_channel`, and deprecated `is_broadcast`, for
now
- [x] When the user changes the broadcast channel name, immediately show
this change on receiving devices
- [x] Allow to change brodacast channel avatar, and immediately apply it
on the receiving device
- [x] Make it possible to block InBroadcastChannel
- [x] Make it possible to set the avatar of an OutgoingChannel, and
apply it on the receiving side
- [x] DECIDE whether we still want to use the broadcast icon as the
default icon or whether we want to use the letter-in-a-circle
- We decided to use the letter-in-a-circle for now, because it's easier
to implement, and I need to stay in the time plan
- [x] chat.rs: Return an error if the user tries to modify a
`InBroadcastChannel`
- [x] Add automated regression tests
- [x] Grep for `broadcast` and see whether there is any other work I
need to do
- [x] Bug: Don't show `~` in front of the sender's same in broadcast
lists

----

Note that I removed the following guard:

```rust
        if !new_chat_contacts.contains(&ContactId::SELF) {
            warn!(
                context,
                "Received group avatar update for group chat {} we are not a member of.", chat.id
            );
        } else if !new_chat_contacts.contains(&from_id) {
            warn!(
                context,
                "Contact {from_id} attempts to modify group chat {} avatar without being a member.",
                chat.id,
            );
        } else [...]
```

i.e. with this change, non-members will be able to modify the avatar.
Things were slightly easier this way, and I think that this is in line
with non-members being able to modify the group name and memberlist
(they need to know the Group-Chat-Id, anyway), but I can also change it
back.
2025-07-02 20:40:30 +00:00
2025-06-30 18:15:29 +00:00
2025-06-26 14:07:39 +00:00
2025-06-28 17:07:59 +00:00
2023-10-29 13:13:44 +00:00
2025-06-26 14:07:39 +00:00
2025-06-30 18:15:29 +00:00
2025-06-26 14:07:39 +00:00
2025-06-26 14:07:39 +00:00
2025-06-21 13:46:00 +00:00
2025-05-16 03:03:58 +00:00
2023-07-04 00:52:31 +02:00
2023-10-29 13:13:44 +00:00

Chatmail logo

Rust CI dependency status

The chatmail core library implements low-level network and encryption protocols, integrated by many chat bots and higher level applications, allowing to securely participate in the globally scaled e-mail server network. We provide reproducibly-built deltachat-rpc-server static binaries that offer a stdio-based high-level JSON-RPC API for instant messaging purposes.

The following protocols are handled without requiring API users to know much about them:

Installing Rust and Cargo

To download and install the official compiler for the Rust programming language, and the Cargo package manager, run the command in your user environment:

$ curl https://sh.rustup.rs -sSf | sh

On Windows, you may need to also install Perl to be able to compile deltachat-core.

Using the CLI client

Compile and run the command line utility, using cargo:

$ cargo run --locked -p deltachat-repl -- ~/profile-db

where ~/profile-db is the database file. The utility will create it if it does not exist.

Optionally, install deltachat-repl binary with

$ cargo install --locked --path deltachat-repl/

and run as

$ deltachat-repl ~/profile-db

Configure your account (if not already configured):

Chatmail is awaiting your commands.
> set addr your@email.org
> set mail_pw yourpassword
> configure

Connect to your mail server (if already configured):

> connect

Create a contact:

> addcontact yourfriends@email.org
Command executed successfully.

List contacts:

> listcontacts
Contact#10: <name unset> <yourfriends@email.org>
Contact#1: Me √√ <your@email.org>

Create a chat with your friend and send a message:

> createchat 10
Single#10 created successfully.
> chat 10
Single#10: yourfriends@email.org [yourfriends@email.org]
> send hi
Message sent.

List messages when inside a chat:

> chat

For more commands type:

> help

Installing libdeltachat system wide

$ git clone https://github.com/chatmail/core.git
$ cd deltachat-core-rust
$ cmake -B build . -DCMAKE_INSTALL_PREFIX=/usr
$ cmake --build build
$ sudo cmake --install build

Development

# run tests
$ cargo test --all
# build c-ffi
$ cargo build -p deltachat_ffi --release

Debugging environment variables

  • DCC_MIME_DEBUG: if set outgoing and incoming message will be printed

  • RUST_LOG=async_imap=trace,async_smtp=trace: enable IMAP and SMTP tracing in addition to info messages.

Expensive tests

Some tests are expensive and marked with #[ignore], to run these use the --ignored argument to the test binary (not to cargo itself):

$ cargo test -- --ignored

Fuzzing

Install cargo-bolero with

$ cargo install cargo-bolero

Run fuzzing tests with

$ cd fuzz
$ cargo bolero test fuzz_mailparse -s NONE

Corpus is created at fuzz/fuzz_targets/corpus, you can add initial inputs there. For fuzz_mailparse target corpus can be populated with ../test-data/message/*.eml.

Features

  • vendored: When using Openssl for TLS, this bundles a vendored version.

Update Provider Data

To add the updates from the provider-db to the core, check line REV= inside ./scripts/update-provider-database.sh and then run the script.

Language bindings and frontend projects

Language bindings are available for:

The following "frontend" projects make use of the Rust-library or its language bindings:


  1. Out of date / unmaintained, if you like those languages feel free to start maintaining them. If you have questions we'll help you, please ask in the issues. ↩︎

Description
Chatmail Rust Core library, used by Android/iOS/desktop chatmail apps, bindings and bots 📧
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