use crate::{ error::{LemmyError, LemmyErrorExt, LemmyErrorType}, settings::structs::Settings, }; use html2text; use lettre::{ message::{Mailbox, MultiPart}, transport::smtp::{authentication::Credentials, extension::ClientId}, Address, AsyncTransport, Message, }; use std::str::FromStr; use uuid::Uuid; pub mod translations { rosetta_i18n::include_translations!(); } type AsyncSmtpTransport = lettre::AsyncSmtpTransport; pub async fn send_email( subject: &str, to_email: &str, to_username: &str, html: &str, settings: &Settings, ) -> Result<(), LemmyError> { let email_config = settings.email.clone().ok_or(LemmyErrorType::NoEmailSetup)?; let domain = settings.hostname.clone(); let (smtp_server, smtp_port) = { let email_and_port = email_config.smtp_server.split(':').collect::>(); let email = *email_and_port .first() .ok_or(LemmyErrorType::MissingAnEmail)?; let port = email_and_port .get(1) .ok_or(LemmyErrorType::EmailSmtpServerNeedsAPort)? .parse::()?; (email, port) }; // use usize::MAX as the line wrap length, since lettre handles the wrapping for us let plain_text = html2text::from_read(html.as_bytes(), usize::MAX); 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 mut builder = match email_config.tls_type.as_str() { "starttls" => AsyncSmtpTransport::starttls_relay(smtp_server)?.port(smtp_port), "tls" => AsyncSmtpTransport::relay(smtp_server)?.port(smtp_port), _ => AsyncSmtpTransport::builder_dangerous(smtp_server).port(smtp_port), }; // Set the creds if they exist let smtp_password = email_config.smtp_password(); if let (Some(username), Some(password)) = (email_config.smtp_login, smtp_password) { builder = builder.credentials(Credentials::new(username, password)); } let mailer = builder.hello_name(ClientId::Domain(domain)).build(); mailer .send(email) .await .with_lemmy_type(LemmyErrorType::EmailSendFailed)?; Ok(()) }