use crate::{settings::structs::Settings, LemmyError}; use html2text; use lettre::{ message::{Mailbox, MultiPart}, transport::smtp::{authentication::Credentials, extension::ClientId}, Address, Message, SmtpTransport, Transport, }; use std::str::FromStr; use uuid::Uuid; pub mod translations { rosetta_i18n::include_translations!(); } pub fn send_email( subject: &str, to_email: &str, to_username: &str, html: &str, settings: &Settings, ) -> Result<(), LemmyError> { let email_config = settings .email .to_owned() .ok_or_else(|| LemmyError::from_message("no_email_setup"))?; let domain = settings.hostname.to_owned(); let (smtp_server, smtp_port) = { let email_and_port = email_config.smtp_server.split(':').collect::>(); if email_and_port.len() == 1 { return Err(LemmyError::from_message( "email.smtp_server needs a port, IE smtp.xxx.com:465", )); } ( email_and_port[0], email_and_port[1] .parse::() .expect("email needs a port"), ) }; // the message length before wrap, 78, is somewhat arbritary but looks good to me let plain_text = html2text::from_read(html.as_bytes(), 78); let email = Message::builder() .from( email_config .smtp_from_address .parse() .expect("email from address isn't valid"), ) .to(Mailbox::new( Some(to_username.to_string()), Address::from_str(to_email).expect("email to address isn't valid"), )) .message_id(Some(format!("{}@{}", Uuid::new_v4(), settings.hostname))) .subject(subject) .multipart(MultiPart::alternative_plain_html( plain_text, html.to_string(), )) .expect("email built incorrectly"); // don't worry about 'dangeous'. it's just that leaving it at the default configuration // is bad. // Set the TLS let builder_dangerous = SmtpTransport::builder_dangerous(smtp_server).port(smtp_port); let mut builder = match email_config.tls_type.as_str() { "starttls" => SmtpTransport::starttls_relay(smtp_server)?, "tls" => SmtpTransport::relay(smtp_server)?, _ => builder_dangerous, }; // Set the creds if they exist if let (Some(username), Some(password)) = (email_config.smtp_login, email_config.smtp_password) { builder = builder.credentials(Credentials::new(username, password)); } let mailer = builder.hello_name(ClientId::Domain(domain)).build(); let result = mailer.send(&email); match result { Ok(_) => Ok(()), Err(e) => Err(LemmyError::from_error_message(e, "email_send_failed")), } }