use std::borrow::Cow;
use mail_builder::headers::{date::Date, message_id::generate_message_id_header};
use mail_parser::{HeaderName, HeaderValue};
use crate::{
compiler::grammar::{
actions::{
action_redirect::{ByTime, Notify, Ret},
action_vacation::{Period, TestVacation, Vacation},
},
AddressPart,
},
runtime::tests::TestResult,
Context, Envelope, Event, Recipient,
};
pub(crate) const MAX_SUBJECT_LEN: usize = 256;
impl TestVacation {
pub(crate) fn exec<C>(&self, ctx: &mut Context<C>) -> TestResult {
let mut from = String::new();
let mut user_addresses = Vec::new();
if ctx.num_out_messages >= ctx.runtime.max_out_messages {
return TestResult::Bool(false);
}
for (name, value) in &ctx.envelope {
if !value.is_empty() {
match name {
Envelope::From => {
from = value.to_string().to_ascii_lowercase();
}
Envelope::To => {
if !ctx.runtime.vacation_use_orig_rcpt {
user_addresses.push(value.to_string());
}
}
Envelope::Orcpt => {
if ctx.runtime.vacation_use_orig_rcpt {
user_addresses.push(value.to_string());
}
}
_ => (),
}
}
}
for address in &self.addresses {
let address = ctx.eval_value(address).to_string().into_owned();
if !address.is_empty() {
user_addresses.push(address.into());
}
}
if !ctx.user_address.is_empty() {
user_addresses.push(ctx.user_address.as_ref().into());
}
if from.is_empty()
|| user_addresses.is_empty()
|| from.starts_with("mailer-daemon")
|| from.starts_with("owner-")
|| from.contains("-request@")
|| user_addresses.iter().any(|a| a.eq_ignore_ascii_case(&from))
{
return TestResult::Bool(false);
}
let mut found_rcpt = false;
let mut received_count = 0;
for header in &ctx.message.parts[0].headers {
match &header.name {
HeaderName::To
| HeaderName::Cc
| HeaderName::Bcc
| HeaderName::ResentTo
| HeaderName::ResentBcc
| HeaderName::ResentCc
if !found_rcpt =>
{
found_rcpt = ctx.find_addresses(header, &AddressPart::All, |addr| {
user_addresses.iter().any(|a| a.eq_ignore_ascii_case(addr))
});
}
HeaderName::ListArchive
| HeaderName::ListHelp
| HeaderName::ListId
| HeaderName::ListOwner
| HeaderName::ListPost
| HeaderName::ListSubscribe
| HeaderName::ListUnsubscribe => {
return TestResult::Bool(false);
}
HeaderName::Received => {
received_count += 1;
}
HeaderName::Other(header_name) => {
if header_name.eq_ignore_ascii_case("Auto-Submitted") {
if header
.value
.as_text()
.map_or(true, |v| !v.eq_ignore_ascii_case("no"))
{
return TestResult::Bool(false);
}
} else if header_name.eq_ignore_ascii_case("X-Auto-Response-Suppress") {
if header.value.as_text().map_or(false, |v| {
v.to_ascii_lowercase()
.split(',')
.any(|v| ["all", "oof"].contains(&v.trim()))
}) {
return TestResult::Bool(false);
}
} else if header_name.eq_ignore_ascii_case("Precedence")
&& header
.value
.as_text()
.map_or(false, |v| v.eq_ignore_ascii_case("bulk"))
{
return TestResult::Bool(false);
}
}
_ => (),
}
}
if found_rcpt && received_count <= ctx.runtime.max_received_headers {
TestResult::Event {
event: Event::DuplicateId {
id: if let Some(handle) = &self.handle {
format!("_v{}{}", from, ctx.eval_value(handle).to_string())
} else {
format!("_v{}{}", from, ctx.eval_value(&self.reason).to_string())
},
expiry: match &self.period {
Period::Days(days) => days * 86400,
Period::Seconds(seconds) => *seconds,
Period::Default => ctx.runtime.default_vacation_expiry,
},
last: false,
},
is_not: true,
}
} else {
TestResult::Bool(false)
}
}
}
impl Vacation {
pub(crate) fn exec<C>(&self, ctx: &mut Context<C>) {
let mut vacation_to = Cow::from("");
for (name, value) in &ctx.envelope {
if !value.is_empty() && name == &Envelope::From {
vacation_to = value.to_string();
break;
}
}
let mut vacation_subject = if let Some(subject) = &self.subject {
ctx.eval_value(subject)
} else {
"".into()
};
let mut message_id = None;
let mut vacation_to_full = None;
let mut references = None;
for header in &ctx.message.parts[0].headers {
match &header.name {
HeaderName::Subject if vacation_subject.is_empty() => {
if let Some(subject) = header.value.as_text() {
let mut vacation_subject_ = String::with_capacity(MAX_SUBJECT_LEN);
let mut iter = ctx
.runtime
.vacation_subject_prefix
.chars()
.chain(subject.chars())
.enumerate();
#[allow(clippy::while_let_on_iterator)]
while let Some((pos, char)) = iter.next() {
if pos < MAX_SUBJECT_LEN {
vacation_subject_.push(char);
} else {
break;
}
}
if iter.next().is_some() {
vacation_subject_.push('…');
}
vacation_subject = vacation_subject_.into();
}
}
HeaderName::MessageId => {
message_id = header.value.as_text();
}
HeaderName::References => {
if header.offset_start > 0 {
references = (&ctx.message.raw_message
[header.offset_start..header.offset_end])
.into();
}
}
HeaderName::From | HeaderName::Sender => {
if matches!(&header.value, HeaderValue::Address(address) if address.contains(vacation_to.as_ref()))
&& header.offset_start > 0
{
vacation_to_full = (&ctx.message.raw_message
[header.offset_start..header.offset_end])
.into();
}
}
_ => (),
}
}
let vacation_from = if let Some(from) = &self.from {
ctx.eval_value(from)
} else if !ctx.user_address.is_empty() {
ctx.user_from_field().into()
} else if let Some(addr) =
ctx.envelope
.iter()
.find_map(|(n, v)| if n == &Envelope::To { Some(v) } else { None })
{
addr.to_string().into()
} else {
"".into()
};
if vacation_subject.is_empty() {
vacation_subject = ctx.runtime.vacation_default_subject.as_ref().into();
}
let vacation_body = ctx.eval_value(&self.reason);
let message_len = vacation_body.len()
+ vacation_from.len()
+ vacation_to_full
.as_ref()
.map_or(vacation_to.len(), |t| t.len())
+ vacation_subject.len()
+ message_id.as_ref().map_or(0, |m| m.len() * 2)
+ references.as_ref().map_or(0, |m| m.len())
+ 160;
let mut message = Vec::with_capacity(message_len);
write_header(&mut message, "From: ", vacation_from.to_string().as_ref());
if let Some(vacation_to_full) = vacation_to_full {
message.extend_from_slice(b"To:");
message.extend_from_slice(vacation_to_full);
} else {
write_header(&mut message, "To: ", vacation_to.to_string().as_ref());
}
write_header(
&mut message,
"Subject: ",
vacation_subject.to_string().as_ref(),
);
if let Some(message_id) = message_id {
message.extend_from_slice(b"In-Reply-To: <");
message.extend_from_slice(message_id.as_bytes());
message.extend_from_slice(b">\r\n");
message.extend_from_slice(b"References: <");
message.extend_from_slice(message_id.as_bytes());
if let Some(references) = references {
message.extend_from_slice(b"> ");
message.extend_from_slice(references);
} else {
message.extend_from_slice(b">\r\n");
}
}
message.extend_from_slice(b"Date: ");
message.extend_from_slice(Date::now().to_rfc822().as_bytes());
message.extend_from_slice(b"\r\n");
message.extend_from_slice(b"Message-ID: ");
generate_message_id_header(&mut message, &ctx.runtime.local_hostname).unwrap();
message.extend_from_slice(b"\r\n");
write_header(&mut message, "Auto-Submitted: ", "auto-replied");
if !self.mime {
message.extend_from_slice(b"Content-type: text/plain; charset=utf-8\r\n\r\n");
}
message.extend_from_slice(vacation_body.to_string().as_bytes());
let mut events = Vec::with_capacity(3);
ctx.last_message_id += 1;
ctx.num_out_messages += 1;
events.push(Event::CreatedMessage {
message_id: ctx.last_message_id,
message,
});
events.push(Event::SendMessage {
recipient: Recipient::Address(vacation_to.to_string()),
notify: Notify::Never,
return_of_content: Ret::Default,
by_time: ByTime::None,
message_id: ctx.last_message_id,
});
if let Some(fcc) = &self.fcc {
events.push(Event::FileInto {
folder: ctx.eval_value(&fcc.mailbox).to_string().into_owned(),
flags: ctx.get_local_flags(&fcc.flags),
mailbox_id: fcc
.mailbox_id
.as_ref()
.map(|m| ctx.eval_value(m).to_string().into_owned()),
special_use: fcc
.special_use
.as_ref()
.map(|s| ctx.eval_value(s).to_string().into_owned()),
create: fcc.create,
message_id: ctx.last_message_id,
});
}
ctx.queued_events = events.into_iter();
}
}
fn write_header(buf: &mut Vec<u8>, name: &str, value: &str) {
buf.extend_from_slice(name.as_bytes());
buf.extend_from_slice(value.as_bytes());
buf.extend_from_slice(b"\r\n");
}