Function deltachat::chat::add_info_msg_with_cmd

pub(crate) async fn add_info_msg_with_cmd(
    context: &Context,
    chat_id: ChatId,
    text: &str,
    cmd: SystemMessage,
    timestamp_sort: i64,
    timestamp_sent_rcvd: Option<i64>,
    parent: Option<&Message>,
    from_id: Option<ContactId>
) -> Result<MsgId>

Adds an informational message to chat.

For example, it can be a message showing that a member was added to a group.