/*
* Copyright (c) 2020-2023, Stalwart Labs Ltd.
*
* This file is part of the Stalwart Sieve Interpreter.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
* in the LICENSE file at the top-level directory of this distribution.
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see .
*
* You can be released from the requirements of the AGPLv3 license by
* purchasing a commercial license. Please contact licensing@stalw.art
* for more details.
*/
use std::borrow::Cow;
use mail_parser::{parsers::MessageStream, DateTime, Header, HeaderValue};
use crate::sieve::{
compiler::{
grammar::{
tests::test_date::{DatePart, TestCurrentDate, TestDate, Zone},
MatchType,
},
Number,
},
runtime::Variable,
Context, Event,
};
use super::TestResult;
impl TestDate {
pub(crate) fn exec(&self, ctx: &mut Context) -> TestResult {
let header_name = if let Some(header_name) = ctx.parse_header_name(&self.header_name) {
header_name
} else {
return TestResult::Bool(false ^ self.is_not);
};
let result = match &self.match_type {
MatchType::Count(rel_match) => {
let mut date_count = 0;
ctx.find_headers(
&[header_name],
self.index,
self.mime_anychild,
|header, _, _| {
if ctx.find_dates(header).is_some() {
date_count += 1;
}
false
},
);
let mut result = false;
for key in &self.key_list {
if rel_match.cmp(&Number::from(date_count), &ctx.eval_value(key).to_number()) {
result = true;
break;
}
}
result
}
MatchType::List => {
let mut values = Vec::new();
ctx.find_headers(
&[header_name],
self.index,
self.mime_anychild,
|header, _, _| {
if let Some(dt) = ctx.find_dates(header) {
let value = self.date_part.eval(self.zone.eval(dt.as_ref()).as_ref());
if !value.is_empty() && !values.iter().any(|v: &String| v.eq(&value)) {
values.push(value);
}
}
false
},
);
if !values.is_empty() {
return TestResult::Event {
event: Event::ListContains {
lists: ctx.eval_values_owned(&self.key_list),
values,
match_as: self.comparator.as_match(),
},
is_not: self.is_not,
};
}
false
}
_ => {
let key_list = ctx.eval_values(&self.key_list);
let mut captured_values = Vec::new();
let result = ctx.find_headers(
&[header_name],
self.index,
self.mime_anychild,
|header, _, _| {
if let Some(dt) = ctx.find_dates(header) {
let date_part =
self.date_part.eval(self.zone.eval(dt.as_ref()).as_ref());
for key in &key_list {
if match &self.match_type {
MatchType::Is => {
self.comparator.is(&Variable::from(&date_part), key)
}
MatchType::Contains => {
self.comparator.contains(&date_part, key.to_cow().as_ref())
}
MatchType::Value(rel_match) => self.comparator.relational(
rel_match,
&Variable::from(&date_part),
key,
),
MatchType::Matches(capture_positions) => {
self.comparator.matches(
&date_part,
key.to_cow().as_ref(),
*capture_positions,
&mut captured_values,
)
}
MatchType::Regex(capture_positions) => self.comparator.matches(
&date_part,
key.to_cow().as_ref(),
*capture_positions,
&mut captured_values,
),
MatchType::Count(_) | MatchType::List => false,
} {
return true;
}
}
}
false
},
);
if !captured_values.is_empty() {
ctx.set_match_variables(captured_values);
}
result
}
};
TestResult::Bool(result ^ self.is_not)
}
}
impl TestCurrentDate {
pub(crate) fn exec(&self, ctx: &mut Context) -> TestResult {
let mut result = false;
match &self.match_type {
MatchType::Count(rel_match) => {
for key in &self.key_list {
if rel_match.cmp(&Number::from(1.0), &ctx.eval_value(key).to_number()) {
result = true;
break;
}
}
}
MatchType::List => {
let value = self.date_part.eval(
&(if let Some(zone) = self.zone {
DateTime::from_timestamp(ctx.current_time).to_timezone(zone)
} else {
DateTime::from_timestamp(ctx.current_time)
}),
);
if !value.is_empty() {
return TestResult::Event {
event: Event::ListContains {
lists: ctx.eval_values_owned(&self.key_list),
values: vec![value],
match_as: self.comparator.as_match(),
},
is_not: self.is_not,
};
}
}
_ => {
let mut captured_values = Vec::new();
let date_part = self.date_part.eval(
&(if let Some(zone) = self.zone {
DateTime::from_timestamp(ctx.current_time).to_timezone(zone)
} else {
DateTime::from_timestamp(ctx.current_time)
}),
);
for key in &self.key_list {
let key = ctx.eval_value(key);
if match &self.match_type {
MatchType::Is => self.comparator.is(&Variable::from(&date_part), &key),
MatchType::Contains => self
.comparator
.contains(&date_part, key.into_cow().as_ref()),
MatchType::Value(rel_match) => {
self.comparator
.relational(rel_match, &Variable::from(&date_part), &key)
}
MatchType::Matches(capture_positions) => self.comparator.matches(
&date_part,
key.into_cow().as_ref(),
*capture_positions,
&mut captured_values,
),
MatchType::Regex(capture_positions) => self.comparator.matches(
&date_part,
key.into_cow().as_ref(),
*capture_positions,
&mut captured_values,
),
MatchType::Count(_) | MatchType::List => false,
} {
result = true;
break;
}
}
if !captured_values.is_empty() {
ctx.set_match_variables(captured_values);
}
}
}
TestResult::Bool(result ^ self.is_not)
}
}
impl<'x> Context<'x> {
#[allow(unused_assignments)]
pub(crate) fn find_dates(&self, header: &'x Header) -> Option> {
if let HeaderValue::DateTime(dt) = &header.value {
if dt.is_valid() {
return Some(Cow::Borrowed(dt));
}
} else if header.offset_end > 0 {
let bytes = self
.message
.raw_message
.get(header.offset_start..header.offset_end)?;
if let HeaderValue::DateTime(dt) = MessageStream::new(bytes).parse_date() {
if dt.is_valid() {
return Some(Cow::Owned(dt));
}
}
} else if let HeaderValue::Text(text) = &header.value {
// Inserted header
let bytes = format!("{text}\n").into_bytes();
if let HeaderValue::DateTime(dt) = MessageStream::new(&bytes).parse_date() {
if dt.is_valid() {
return Some(Cow::Owned(dt));
}
}
}
None
}
}
impl DatePart {
fn eval(&self, dt: &DateTime) -> String {
match self {
DatePart::Year => format!("{:04}", dt.year),
DatePart::Month => format!("{:02}", dt.month),
DatePart::Day => format!("{:02}", dt.day),
DatePart::Date => format!("{:04}-{:02}-{:02}", dt.year, dt.month, dt.day,),
DatePart::Julian => ((dt.julian_day() as f64 - 2400000.5) as i64).to_string(),
DatePart::Hour => format!("{:02}", dt.hour),
DatePart::Minute => format!("{:02}", dt.minute),
DatePart::Second => format!("{:02}", dt.second),
DatePart::Time => format!("{:02}:{:02}:{:02}", dt.hour, dt.minute, dt.second,),
DatePart::Iso8601 => dt.to_rfc3339(),
DatePart::Std11 => dt.to_rfc822(),
DatePart::Zone => format!(
"{}{:02}{:02}",
if dt.tz_before_gmt && (dt.tz_hour > 0 || dt.tz_minute > 0) {
"-"
} else {
"+"
},
dt.tz_hour,
dt.tz_minute
),
DatePart::Weekday => dt.day_of_week().to_string(),
}
}
}
impl Zone {
pub(crate) fn eval<'x>(&self, dt: &'x DateTime) -> Cow<'x, DateTime> {
match self {
Zone::Time(tz) => Cow::Owned(dt.to_timezone(*tz)),
Zone::Original => Cow::Borrowed(dt),
Zone::Local => Cow::Owned(DateTime::from_timestamp(dt.to_timestamp())),
}
}
}