7620f854a7 2024-05-21 1: use anyhow::Result;
7620f854a7 2024-05-21 2: use async_std::task;
7620f854a7 2024-05-21 3: use samotop::{
7620f854a7 2024-05-21 4: mail::{
7620f854a7 2024-05-21 5: Builder,
7620f854a7 2024-05-21 6: DebugService,
7620f854a7 2024-05-21 7: MailDir,
7620f854a7 2024-05-21 8: Name
7620f854a7 2024-05-21 9: },
7620f854a7 2024-05-21 10: smtp::Prudence,
7620f854a7 2024-05-21 11: };
7620f854a7 2024-05-21 12: use telegram_bot::{
7620f854a7 2024-05-21 13: Api,
7620f854a7 2024-05-21 14: ParseMode,
7620f854a7 2024-05-21 15: SendMessage,
7620f854a7 2024-05-21 16: UserId,
7620f854a7 2024-05-21 17: };
7620f854a7 2024-05-21 18:
7620f854a7 2024-05-21 19: use std::{
7620f854a7 2024-05-21 20: borrow::Cow,
61238a3618 2024-05-22 21: collections::{
61238a3618 2024-05-22 22: HashMap,
61238a3618 2024-05-22 23: HashSet,
61238a3618 2024-05-22 24: },
7620f854a7 2024-05-21 25: io::Read,
7620f854a7 2024-05-21 26: path::{
7620f854a7 2024-05-21 27: Path,
7620f854a7 2024-05-21 28: PathBuf
7620f854a7 2024-05-21 29: },
7620f854a7 2024-05-21 30: time::Duration,
7620f854a7 2024-05-21 31: vec::Vec,
7620f854a7 2024-05-21 32: };
7620f854a7 2024-05-21 33:
61238a3618 2024-05-22 34: fn address_into_iter<'a>(addr: &'a mail_parser::Address<'a, >) -> impl Iterator<Item = Cow<'a, str>> {
61238a3618 2024-05-22 35: addr.clone().into_list().into_iter().map(|a| a.address.unwrap())
61238a3618 2024-05-22 36: }
7620f854a7 2024-05-21 37:
61238a3618 2024-05-22 38: fn relay_mails(maildir: &Path, core: &TelegramTransport) -> Result<()> {
7620f854a7 2024-05-21 39: let new_dir = maildir.join("new");
7620f854a7 2024-05-21 40:
7620f854a7 2024-05-21 41: std::fs::create_dir_all(&new_dir)?;
7620f854a7 2024-05-21 42:
7620f854a7 2024-05-21 43: let files = std::fs::read_dir(new_dir)?;
7620f854a7 2024-05-21 44: for file in files {
7620f854a7 2024-05-21 45: let file = file?;
7620f854a7 2024-05-21 46: let mut buf = Vec::new();
7620f854a7 2024-05-21 47: std::fs::File::open(file.path())?.read_to_end(&mut buf)?;
7620f854a7 2024-05-21 48:
7620f854a7 2024-05-21 49: task::block_on(async move {
61238a3618 2024-05-22 50: match mail_parser::MessageParser::default().parse(&buf[..]) {
7620f854a7 2024-05-21 51: Some(mail) => {
61238a3618 2024-05-22 52: let mail = mail.clone();
61238a3618 2024-05-22 53:
61238a3618 2024-05-22 54: // Fetching address lists from fields we know
61238a3618 2024-05-22 55: let mut to = HashSet::new();
61238a3618 2024-05-22 56: if let Some(addr) = mail.to() {
61238a3618 2024-05-22 57: let _ = address_into_iter(addr).map(|x| to.insert(x));
61238a3618 2024-05-22 58: };
61238a3618 2024-05-22 59: if let Some(addr) = mail.header("X-Samotop-To") {
61238a3618 2024-05-22 60: match addr {
61238a3618 2024-05-22 61: mail_parser::HeaderValue::Address(addr) => {
61238a3618 2024-05-22 62: let _ = address_into_iter(addr).map(|x| to.insert(x));
61238a3618 2024-05-22 63: },
61238a3618 2024-05-22 64: mail_parser::HeaderValue::Text(text) => {
61238a3618 2024-05-22 65: to.insert(text.clone());
61238a3618 2024-05-22 66: },
61238a3618 2024-05-22 67: _ => {}
61238a3618 2024-05-22 68: }
61238a3618 2024-05-22 69: };
61238a3618 2024-05-22 70:
61238a3618 2024-05-22 71: // Adding all known addresses to recipient list, for anyone else adding default
61238a3618 2024-05-22 72: // Also if list is empty also adding default
61238a3618 2024-05-22 73: let mut rcpt: HashSet<UserId> = HashSet::new();
61238a3618 2024-05-22 74: for item in to {
61238a3618 2024-05-22 75: let item = item.into_owned();
61238a3618 2024-05-22 76: if core.recipients.contains_key(&item) {
61238a3618 2024-05-22 77: rcpt.insert(core.recipients[&item]);
61238a3618 2024-05-22 78: } else {
61238a3618 2024-05-22 79: core.debug(format!("Recipient [{}] not found.", &item)).await.unwrap();
61238a3618 2024-05-22 80: rcpt.insert(core.default);
61238a3618 2024-05-22 81: }
61238a3618 2024-05-22 82: };
61238a3618 2024-05-22 83: if rcpt.is_empty() {
61238a3618 2024-05-22 84: rcpt.insert(core.default);
61238a3618 2024-05-22 85: core.debug("No recipient or envelope address.").await.unwrap();
61238a3618 2024-05-22 86: };
61238a3618 2024-05-22 87:
61238a3618 2024-05-22 88: // prepating message header
61238a3618 2024-05-22 89: let mut reply: Vec<Cow<str>> = vec![];
61238a3618 2024-05-22 90: if let Some(subject) = mail.subject() {
61238a3618 2024-05-22 91: reply.push(format!("<b>Subject:</b> {}", subject).into());
61238a3618 2024-05-22 92: } else if let Some(thread) = mail.thread_name() {
61238a3618 2024-05-22 93: reply.push(format!("<b>Thread:</b> {}", thread).into());
61238a3618 2024-05-22 94: }
61238a3618 2024-05-22 95: if let Some(from) = mail.from() {
61238a3618 2024-05-22 96: reply.push(format!("<b>From:</b> {:?}", from).into());
61238a3618 2024-05-22 97: }
61238a3618 2024-05-22 98: if let Some(sender) = mail.sender() {
61238a3618 2024-05-22 99: reply.push(format!("<b>Sender:</b> {:?}", sender).into());
61238a3618 2024-05-22 100: }
61238a3618 2024-05-22 101: reply.push("".into());
61238a3618 2024-05-22 102: let header_size = reply.join("\n").len() + 1;
61238a3618 2024-05-22 103:
61238a3618 2024-05-22 104: let html_parts = mail.html_body_count();
61238a3618 2024-05-22 105: let text_parts = mail.text_body_count();
61238a3618 2024-05-22 106: let attachments = mail.attachment_count();
61238a3618 2024-05-22 107: if html_parts != text_parts {
61238a3618 2024-05-22 108: core.debug(format!("Hm, we have {} HTML parts and {} text parts.", html_parts, text_parts)).await.unwrap();
61238a3618 2024-05-22 109: }
61238a3618 2024-05-22 110: //let mut html_num = 0;
61238a3618 2024-05-22 111: let mut text_num = 0;
61238a3618 2024-05-22 112: let mut file_num = 0;
61238a3618 2024-05-22 113: // let's display first html or text part as body
61238a3618 2024-05-22 114: let mut body = "".into();
7620f854a7 2024-05-21 115: /*
61238a3618 2024-05-22 116: * actually I don't wanna parse that html stuff
61238a3618 2024-05-22 117: if html_parts > 0 {
61238a3618 2024-05-22 118: let text = mail.body_html(0).unwrap();
61238a3618 2024-05-22 119: if text.len() < 4096 - header_size {
61238a3618 2024-05-22 120: body = text;
61238a3618 2024-05-22 121: html_num = 1;
61238a3618 2024-05-22 122: }
61238a3618 2024-05-22 123: };
61238a3618 2024-05-22 124: */
61238a3618 2024-05-22 125: if body == "" && text_parts > 0 {
61238a3618 2024-05-22 126: let text = mail.body_text(0).unwrap();
61238a3618 2024-05-22 127: if text.len() < 4096 - header_size {
61238a3618 2024-05-22 128: body = text;
61238a3618 2024-05-22 129: text_num = 1;
61238a3618 2024-05-22 130: }
7620f854a7 2024-05-21 131: };
61238a3618 2024-05-22 132: reply.push(body);
61238a3618 2024-05-22 133:
61238a3618 2024-05-22 134: // and let's coillect all other attachment parts
61238a3618 2024-05-22 135: let mut files_to_send = vec![];
61238a3618 2024-05-22 136: /*
61238a3618 2024-05-22 137: * let's just skip html parts for now, they just duplicate text?
61238a3618 2024-05-22 138: while html_num < html_parts {
61238a3618 2024-05-22 139: files_to_send.push(mail.html_part(html_num).unwrap());
61238a3618 2024-05-22 140: html_num += 1;
61238a3618 2024-05-22 141: }
7620f854a7 2024-05-21 142: */
61238a3618 2024-05-22 143: while text_num < text_parts {
61238a3618 2024-05-22 144: files_to_send.push(mail.text_part(text_num).unwrap());
61238a3618 2024-05-22 145: text_num += 1;
61238a3618 2024-05-22 146: }
61238a3618 2024-05-22 147: while file_num < attachments {
61238a3618 2024-05-22 148: files_to_send.push(mail.attachment(file_num).unwrap());
61238a3618 2024-05-22 149: file_num += 1;
61238a3618 2024-05-22 150: }
61238a3618 2024-05-22 151:
61238a3618 2024-05-22 152: for chat in rcpt {
61238a3618 2024-05-22 153: core.send(chat, reply.join("\n")).await.unwrap();
61238a3618 2024-05-22 154: for chunk in &files_to_send {
61238a3618 2024-05-22 155: task::sleep(Duration::from_secs(5)).await;
61238a3618 2024-05-22 156: let data = chunk.contents().to_vec();
61238a3618 2024-05-22 157: let obj = telegram_bot::types::InputFileUpload::with_data(data, "Attachment");
61238a3618 2024-05-22 158: core.sendfile(chat, obj).await.unwrap();
61238a3618 2024-05-22 159: }
61238a3618 2024-05-22 160: }
7620f854a7 2024-05-21 161: },
7620f854a7 2024-05-21 162: None => { core.debug("None mail.").await.unwrap(); },
7620f854a7 2024-05-21 163: //send_to_sendgrid(mail, sendgrid_api_key).await;
7620f854a7 2024-05-21 164: };
7620f854a7 2024-05-21 165: });
7620f854a7 2024-05-21 166:
7620f854a7 2024-05-21 167: std::fs::remove_file(file.path())?;
7620f854a7 2024-05-21 168: }
7620f854a7 2024-05-21 169: Ok(())
7620f854a7 2024-05-21 170: }
7620f854a7 2024-05-21 171:
7620f854a7 2024-05-21 172: fn my_prudence() -> Prudence {
7620f854a7 2024-05-21 173: Prudence::default().with_read_timeout(Duration::from_secs(60)).with_banner_delay(Duration::from_secs(1))
7620f854a7 2024-05-21 174: }
7620f854a7 2024-05-21 175:
61238a3618 2024-05-22 176: pub struct TelegramTransport {
7620f854a7 2024-05-21 177: default: UserId,
7620f854a7 2024-05-21 178: tg: Api,
7620f854a7 2024-05-21 179: recipients: HashMap<String, UserId>,
7620f854a7 2024-05-21 180: }
7620f854a7 2024-05-21 181:
61238a3618 2024-05-22 182: impl TelegramTransport {
61238a3618 2024-05-22 183: pub fn new(settings: &config::Config) -> TelegramTransport {
7620f854a7 2024-05-21 184: let api_key = settings.get_string("api_key").unwrap();
7620f854a7 2024-05-21 185: let tg = Api::new(api_key);
61238a3618 2024-05-22 186: let default_recipient = settings.get_string("default").unwrap();
61238a3618 2024-05-22 187: let recipients: HashMap<String, UserId> = settings.get_table("recipients").unwrap().into_iter().map(|(a, b)| (a, UserId::new(b.into_int().unwrap()))).collect();
61238a3618 2024-05-22 188: // Barf if no default
7620f854a7 2024-05-21 189: let default = recipients[&default_recipient];
7620f854a7 2024-05-21 190:
61238a3618 2024-05-22 191: TelegramTransport {
7620f854a7 2024-05-21 192: default,
7620f854a7 2024-05-21 193: tg,
7620f854a7 2024-05-21 194: recipients,
61238a3618 2024-05-22 195: }
7620f854a7 2024-05-21 196: }
7620f854a7 2024-05-21 197:
7620f854a7 2024-05-21 198: pub async fn debug<'b, S>(&self, msg: S) -> Result<()>
7620f854a7 2024-05-21 199: where S: Into<Cow<'b, str>> {
7620f854a7 2024-05-21 200: self.tg.send(SendMessage::new(self.default, msg)
61238a3618 2024-05-22 201: .parse_mode(ParseMode::Html)).await?;
61238a3618 2024-05-22 202: Ok(())
61238a3618 2024-05-22 203: }
61238a3618 2024-05-22 204:
61238a3618 2024-05-22 205: pub async fn send<'b, S>(&self, to: UserId, msg: S) -> Result<()>
61238a3618 2024-05-22 206: where S: Into<Cow<'b, str>> {
61238a3618 2024-05-22 207: self.tg.send(SendMessage::new(to, msg)
61238a3618 2024-05-22 208: .parse_mode(ParseMode::Html)).await?;
7620f854a7 2024-05-21 209: Ok(())
7620f854a7 2024-05-21 210: }
7620f854a7 2024-05-21 211:
61238a3618 2024-05-22 212: pub async fn sendfile<V>(&self, to: UserId, chunk: V) -> Result<()>
61238a3618 2024-05-22 213: where V: Into<telegram_bot::InputFile> {
61238a3618 2024-05-22 214: self.tg.send(telegram_bot::SendDocument::new(to, chunk)).await?;
7620f854a7 2024-05-21 215: Ok(())
7620f854a7 2024-05-21 216: }
7620f854a7 2024-05-21 217: }
7620f854a7 2024-05-21 218:
7620f854a7 2024-05-21 219: #[async_std::main]
7620f854a7 2024-05-21 220: async fn main() {
7620f854a7 2024-05-21 221: let settings: config::Config = config::Config::builder()
7620f854a7 2024-05-21 222: .add_source(config::File::with_name("smtp2tg.toml"))
7620f854a7 2024-05-21 223: .build().unwrap();
7620f854a7 2024-05-21 224:
61238a3618 2024-05-22 225: let core = TelegramTransport::new(&settings);
7620f854a7 2024-05-21 226: let maildir: PathBuf = settings.get_string("maildir").unwrap().into();
7620f854a7 2024-05-21 227: let listen_on = settings.get_string("listen_on").unwrap();
7620f854a7 2024-05-21 228: let sink = Builder + Name::new("smtp2tg") + DebugService +
7620f854a7 2024-05-21 229: samotop::smtp::Esmtp.with(samotop::smtp::SmtpParser) + my_prudence() +
61238a3618 2024-05-22 230: //TelegramTransport::new(&settings);
7620f854a7 2024-05-21 231: MailDir::new(maildir.clone()).unwrap();
7620f854a7 2024-05-21 232:
7620f854a7 2024-05-21 233: task::spawn(async move {
7620f854a7 2024-05-21 234: loop {
7620f854a7 2024-05-21 235: relay_mails(&maildir, &core).unwrap();
61238a3618 2024-05-22 236: task::sleep(Duration::from_secs(5)).await;
7620f854a7 2024-05-21 237: }
7620f854a7 2024-05-21 238: });
7620f854a7 2024-05-21 239:
7620f854a7 2024-05-21 240: match listen_on.as_str() {
7620f854a7 2024-05-21 241: "socket" => samotop::server::UnixServer::on("./smtp2tg.sock")
7620f854a7 2024-05-21 242: .serve(sink.build()).await.unwrap(),
7620f854a7 2024-05-21 243: _ => samotop::server::TcpServer::on(listen_on)
7620f854a7 2024-05-21 244: .serve(sink.build()).await.unwrap(),
7620f854a7 2024-05-21 245: };
7620f854a7 2024-05-21 246: }