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fix: Don't send ChatGroupId for broadcast channels (#6975)

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Older versions of Delta Chat ignore the message if it contains a
ChatGroupId header. ("older versions" means all versions without #6901,
i.e.currently released versions)

This means that without this PR, broadcast channel messages sent from
current main don't arrive at a device running latest released DC.

Part of #6884.
This commit is contained in:
Hocuri
2025-07-07 12:06:54 +02:00
committed by GitHub
parent 35e107e87d
commit aad8f698dd
2 changed files with 11 additions and 2 deletions
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5
src/chat/chat_tests.rs
View File

@@ -2650,6 +2650,11 @@ async fn test_broadcast() -> Result<()> {
assert!(msg.was_encrypted());
assert!(!msg.header_exists(HeaderDef::ChatGroupMemberTimestamps));
assert!(!msg.header_exists(HeaderDef::AutocryptGossip));
// If we sent a ChatGroupId header,
// older versions of DC would ignore the message
assert!(!msg.header_exists(HeaderDef::ChatGroupId));
let msg = bob.recv_msg(&sent_msg).await;
assert_eq!(msg.get_text(), "ola!");
assert_eq!(msg.subject, "Broadcast channel");

8
src/mimefactory.rs
View File

@@ -4,7 +4,7 @@ use std::collections::{BTreeSet, HashSet};
use std::io::Cursor;
use std::path::Path;
use anyhow::{Context as _, Result, bail};
use anyhow::{Context as _, Result, bail, ensure};
use base64::Engine as _;
use chrono::TimeZone;
use deltachat_contact_tools::sanitize_bidi_characters;
@@ -1311,7 +1311,7 @@ impl MimeFactory {
));
}
if chat.typ == Chattype::Group || chat.typ == Chattype::OutBroadcast {
if chat.typ == Chattype::Group {
// Send group ID unless it is an ad hoc group that has no ID.
if !chat.grpid.is_empty() {
headers.push((
@@ -1319,7 +1319,9 @@ impl MimeFactory {
mail_builder::headers::raw::Raw::new(chat.grpid.clone()).into(),
));
}
}
if chat.typ == Chattype::Group || chat.typ == Chattype::OutBroadcast {
headers.push((
"Chat-Group-Name",
mail_builder::headers::text::Text::new(chat.name.to_string()).into(),
@@ -1333,6 +1335,7 @@ impl MimeFactory {
match command {
SystemMessage::MemberRemovedFromGroup => {
ensure!(chat.typ != Chattype::OutBroadcast);
let email_to_remove = msg.param.get(Param::Arg).unwrap_or_default();
if email_to_remove
@@ -1356,6 +1359,7 @@ impl MimeFactory {
}
}
SystemMessage::MemberAddedToGroup => {
ensure!(chat.typ != Chattype::OutBroadcast);
// TODO: lookup the contact by ID rather than email address.
// We are adding key-contacts, the cannot be looked up by address.
let email_to_add = msg.param.get(Param::Arg).unwrap_or_default();