97 lines
3 KiB
Rust
97 lines
3 KiB
Rust
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use std::{fs::File, io::Read, path::Path, sync::mpsc::Receiver, thread};
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use lettre::{
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message::{header::ContentType, Mailbox},
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transport::smtp::{
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authentication::{Credentials, Mechanism},
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PoolConfig,
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},
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AsyncSmtpTransport, AsyncTransport, Message, Tokio1Executor,
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};
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use once_cell::sync::Lazy;
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use tokio::runtime::Handle;
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use super::UserConfirmationMessage;
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static CREDENTIALS: Lazy<Credentials> = Lazy::new(|| {
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Credentials::new(
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"donotreply@mail.dziura.cloud".to_owned(),
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"hunter2".to_owned(),
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)
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});
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static NUM_CPUS: Lazy<u32> = Lazy::new(|| num_cpus::get() as u32);
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static FROM_MAILBOX: Lazy<Mailbox> = Lazy::new(|| {
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"No Not Reply Auth-Test <donotreply@mail.dziura.cloud>"
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.parse()
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.unwrap()
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});
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pub fn start_emailer_service(
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runtime: Handle,
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assets_dir: &Path,
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email_message_rx: Receiver<UserConfirmationMessage>,
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) {
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let new_user_confirmation_template_path = assets_dir.join("new-user-confirmation.html");
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// TODO: Validate that the new user confirmation template exists
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let mut new_user_confirmation_template_text = String::with_capacity(8000);
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File::open(new_user_confirmation_template_path)
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.and_then(|mut file| file.read_to_string(&mut new_user_confirmation_template_text))
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.unwrap();
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thread::spawn(move || {
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while let Some(message) = email_message_rx.iter().next() {
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let new_user_confirmation_template_text = new_user_confirmation_template_text.clone();
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let UserConfirmationMessage {
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email: recipient_email,
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name,
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auth_token,
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} = message;
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runtime.spawn(async move {
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send_new_user_confirmation_email(
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recipient_email.as_str(),
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new_user_confirmation_template_text.as_str(),
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name.as_str(),
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auth_token.as_str(),
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)
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.await;
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});
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}
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});
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}
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async fn send_new_user_confirmation_email(
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recipient_email: &str,
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new_user_confirmation_template_text: &str,
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name: &str,
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auth_token: &str,
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) {
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let body = new_user_confirmation_template_text
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.replace("$NAME", name)
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.replace("$AUTH_TOKEN", auth_token);
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let message = Message::builder()
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.from(FROM_MAILBOX.clone())
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.reply_to(FROM_MAILBOX.clone())
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.to(recipient_email.parse().unwrap())
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.subject(format!(
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"You're registered, {name}, please confirm your email address"
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))
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.header(ContentType::TEXT_HTML)
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.body(body)
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.unwrap();
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let sender: AsyncSmtpTransport<Tokio1Executor> =
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AsyncSmtpTransport::<Tokio1Executor>::starttls_relay("mail.dziura.cloud")
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.unwrap()
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.credentials(CREDENTIALS.clone())
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.authentication(vec![Mechanism::Plain])
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.pool_config(PoolConfig::new().max_size(*NUM_CPUS))
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.build();
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let _ = sender.send(message).await;
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}
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