deltachat::receive_imf

Function decide_chat_assignment

Source 
async fn decide_chat_assignment(
    context: &Context,
    mime_parser: &MimeMessage,
    parent_message: &Option<Message>,
    rfc724_mid: &str,
    from_id: ContactId,
    is_partial_download: &Option<u32>,
) -> Result<ChatAssignment>