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vec::Vec,
};
fn address_into_iter<'a>(addr: &'a mail_parser::Address<'a, >) -> impl Iterator<Item = Cow<'a, str>> {
addr.clone().into_list().into_iter().map(|a| a.address.unwrap())
}
fn relay_mails(maildir: &Path, core: &TelegramTransport) -> Result<()> {
async fn relay_mails(maildir: &Path, core: &TelegramTransport) -> Result<()> {
let new_dir = maildir.join("new");
std::fs::create_dir_all(&new_dir)?;
let files = std::fs::read_dir(new_dir)?;
for file in files {
let file = file?;
let mut buf = Vec::new();
std::fs::File::open(file.path())?.read_to_end(&mut buf)?;
task::block_on(async move {
match mail_parser::MessageParser::default().parse(&buf[..]) {
Some(mail) => {
let mail = mail.clone();
// Fetching address lists from fields we know
let mut to = HashSet::new();
if let Some(addr) = mail.to() {
let _ = address_into_iter(addr).map(|x| to.insert(x));
};
if let Some(addr) = mail.header("X-Samotop-To") {
match addr {
mail_parser::HeaderValue::Address(addr) => {
let _ = address_into_iter(addr).map(|x| to.insert(x));
},
mail_parser::HeaderValue::Text(text) => {
to.insert(text.clone());
},
_ => {}
}
};
// Adding all known addresses to recipient list, for anyone else adding default
// Also if list is empty also adding default
let mut rcpt: HashSet<&UserId> = HashSet::new();
for item in to {
let item = item.into_owned();
match core.recipients.get(&item) {
Some(addr) => rcpt.insert(addr),
None => {
core.debug(format!("Recipient [{}] not found.", &item)).await.unwrap();
rcpt.insert(core.recipients.get("_").unwrap())
}
};
};
if rcpt.is_empty() {
core.debug("No recipient or envelope address.").await.unwrap();
rcpt.insert(core.recipients.get("_").unwrap());
};
// prepating message header
let mut reply: Vec<Cow<str>> = vec![];
if let Some(subject) = mail.subject() {
reply.push(format!("**Subject:** `{}`", subject).into());
} else if let Some(thread) = mail.thread_name() {
reply.push(format!("**Thread:** `{}`", thread).into());
}
if let Some(from) = mail.from() {
reply.push(format!("**From:** `{:?}`", address_into_iter(from).collect::<Vec<_>>().join(", ")).into());
}
if let Some(sender) = mail.sender() {
reply.push(format!("**Sender:** `{:?}`", address_into_iter(sender).collect::<Vec<_>>().join(", ")).into());
}
reply.push("".into());
let header_size = reply.join("\n").len() + 1;
let html_parts = mail.html_body_count();
let text_parts = mail.text_body_count();
let attachments = mail.attachment_count();
if html_parts != text_parts {
core.debug(format!("Hm, we have {} HTML parts and {} text parts.", html_parts, text_parts)).await.unwrap();
}
//let mut html_num = 0;
let mut text_num = 0;
let mut file_num = 0;
// let's display first html or text part as body
let mut body = "".into();
/*
* actually I don't wanna parse that html stuff
if html_parts > 0 {
let text = mail.body_html(0).unwrap();
if text.len() < 4096 - header_size {
body = text;
html_num = 1;
}
};
*/
if body == "" && text_parts > 0 {
let text = mail.body_text(0).unwrap();
if text.len() < 4096 - header_size {
body = text;
text_num = 1;
}
};
reply.push("```".into());
for line in body.lines() {
reply.push(line.into());
}
reply.push("```".into());
// and let's collect all other attachment parts
let mut files_to_send = vec![];
/*
* let's just skip html parts for now, they just duplicate text?
while html_num < html_parts {
files_to_send.push(mail.html_part(html_num).unwrap());
html_num += 1;
}
*/
while text_num < text_parts {
files_to_send.push(mail.text_part(text_num).unwrap());
text_num += 1;
}
while file_num < attachments {
files_to_send.push(mail.attachment(file_num).unwrap());
file_num += 1;
}
for chat in rcpt {
let base_post = core.send(chat, reply.join("\n")).await.unwrap();
for chunk in &files_to_send {
let data = chunk.contents().to_vec();
let obj = telegram_bot::types::InputFileUpload::with_data(data, "Attachment");
core.sendfile(chat, obj, Some(&base_post)).await.unwrap();
}
}
},
None => { core.debug("None mail.").await.unwrap(); },
};
});
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let sink = Builder + Name::new("smtp2tg") + DebugService +
my_prudence() + MailDir::new(maildir.clone()).unwrap();
env_logger::init();
task::spawn(async move {
loop {
// relay mails
relay_mails(&maildir, &core).unwrap();
if let Err(err) = relay_mails(&maildir, &core).await {
// in case that fails - inform default recipient
if let Err(err) = core.debug(format!("Sending emails failed:\n{:?}", err)).await {
// in case that also fails - write some logs and bail
eprintln!("Failed to contact Telegram:\n{:?}", err);
task::sleep(Duration::from_secs(5 * 60)).await;
};
};
task::sleep(Duration::from_secs(5)).await;
}
});
match listen_on.as_str() {
"socket" => {
let socket_path = "./smtp2tg.sock";
|