mirror of
https://github.com/LemmyNet/lemmy.git
synced 2024-10-31 09:40:00 +00:00
94 lines
2.6 KiB
Rust
94 lines
2.6 KiB
Rust
use crate::{
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error::{LemmyError, LemmyErrorExt, LemmyErrorType},
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settings::structs::Settings,
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};
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use html2text;
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use lettre::{
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message::{Mailbox, MultiPart},
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transport::smtp::{authentication::Credentials, extension::ClientId},
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Address,
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AsyncTransport,
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Message,
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};
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use std::str::FromStr;
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use uuid::Uuid;
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pub mod translations {
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rosetta_i18n::include_translations!();
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}
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type AsyncSmtpTransport = lettre::AsyncSmtpTransport<lettre::Tokio1Executor>;
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pub async fn send_email(
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subject: &str,
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to_email: &str,
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to_username: &str,
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html: &str,
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settings: &Settings,
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) -> Result<(), LemmyError> {
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let email_config = settings.email.clone().ok_or(LemmyErrorType::NoEmailSetup)?;
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let domain = settings.hostname.clone();
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let (smtp_server, smtp_port) = {
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let email_and_port = email_config.smtp_server.split(':').collect::<Vec<&str>>();
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let email = *email_and_port
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.first()
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.ok_or(LemmyErrorType::MissingAnEmail)?;
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let port = email_and_port
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.get(1)
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.ok_or(LemmyErrorType::EmailSmtpServerNeedsAPort)?
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.parse::<u16>()?;
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(email, port)
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};
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// use usize::MAX as the line wrap length, since lettre handles the wrapping for us
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let plain_text = html2text::from_read(html.as_bytes(), usize::MAX);
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let email = Message::builder()
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.from(
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email_config
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.smtp_from_address
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.parse()
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.expect("email from address isn't valid"),
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)
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.to(Mailbox::new(
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Some(to_username.to_string()),
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Address::from_str(to_email).expect("email to address isn't valid"),
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))
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.message_id(Some(format!("<{}@{}>", Uuid::new_v4(), settings.hostname)))
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.subject(subject)
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.multipart(MultiPart::alternative_plain_html(
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plain_text,
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html.to_string(),
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))
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.expect("email built incorrectly");
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// don't worry about 'dangeous'. it's just that leaving it at the default configuration
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// is bad.
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// Set the TLS
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let mut builder = match email_config.tls_type.as_str() {
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"starttls" => AsyncSmtpTransport::starttls_relay(smtp_server)?.port(smtp_port),
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"tls" => AsyncSmtpTransport::relay(smtp_server)?.port(smtp_port),
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_ => AsyncSmtpTransport::builder_dangerous(smtp_server).port(smtp_port),
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};
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// Set the creds if they exist
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let smtp_password = std::env::var("LEMMY_SMTP_PASSWORD")
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.ok()
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.or(email_config.smtp_password);
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if let (Some(username), Some(password)) = (email_config.smtp_login, smtp_password) {
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builder = builder.credentials(Credentials::new(username, password));
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}
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let mailer = builder.hello_name(ClientId::Domain(domain)).build();
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mailer
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.send(email)
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.await
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.with_lemmy_type(LemmyErrorType::EmailSendFailed)?;
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Ok(())
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}
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