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355 lines
13 KiB
Rust
355 lines
13 KiB
Rust
/*
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* Copyright (c) 2020-2023, Stalwart Labs Ltd.
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*
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* This file is part of the Stalwart Sieve Interpreter.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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* in the LICENSE file at the top-level directory of this distribution.
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* You can be released from the requirements of the AGPLv3 license by
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* purchasing a commercial license. Please contact licensing@stalw.art
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* for more details.
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*/
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use mail_parser::HeaderName;
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use phf::phf_map;
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use serde::{Deserialize, Serialize};
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use crate::sieve::compiler::{
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grammar::{instruction::CompilerState, Capability, Comparator},
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lexer::{word::Word, StringConstant, Token},
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CompileError, ErrorType, Number, Value,
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};
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use crate::sieve::compiler::grammar::{test::Test, MatchType};
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#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
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pub(crate) struct TestDate {
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pub header_name: Value,
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pub key_list: Vec<Value>,
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pub match_type: MatchType,
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pub comparator: Comparator,
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pub index: Option<i32>,
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pub zone: Zone,
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pub date_part: DatePart,
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pub mime_anychild: bool,
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pub is_not: bool,
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}
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#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
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pub(crate) struct TestCurrentDate {
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pub zone: Option<i64>,
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pub match_type: MatchType,
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pub comparator: Comparator,
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pub date_part: DatePart,
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pub key_list: Vec<Value>,
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pub is_not: bool,
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}
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
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pub(crate) enum Zone {
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Time(i64),
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Original,
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Local,
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}
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
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pub(crate) enum DatePart {
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Year,
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Month,
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Day,
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Date,
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Julian,
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Hour,
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Minute,
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Second,
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Time,
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Iso8601,
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Std11,
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Zone,
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Weekday,
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}
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impl<'x> CompilerState<'x> {
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pub(crate) fn parse_test_date(&mut self) -> Result<Test, CompileError> {
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let mut match_type = MatchType::Is;
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let mut comparator = Comparator::AsciiCaseMap;
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let mut header_name = None;
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let mut key_list;
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let mut index = None;
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let mut index_last = false;
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let mut zone = Zone::Local;
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let mut date_part = None;
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let mut mime = false;
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let mut mime_anychild = false;
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loop {
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let token_info = self.tokens.unwrap_next()?;
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match token_info.token {
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Token::Tag(
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word @ (Word::Is
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| Word::Contains
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| Word::Matches
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| Word::Value
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| Word::Count
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| Word::Regex
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| Word::List),
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) => {
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self.validate_argument(
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1,
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match word {
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Word::Value | Word::Count => Capability::Relational.into(),
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Word::Regex => Capability::Regex.into(),
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Word::List => Capability::ExtLists.into(),
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_ => None,
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},
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token_info.line_num,
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token_info.line_pos,
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)?;
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match_type = self.parse_match_type(word)?;
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}
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Token::Tag(Word::Comparator) => {
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self.validate_argument(2, None, token_info.line_num, token_info.line_pos)?;
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comparator = self.parse_comparator()?;
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}
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Token::Tag(Word::Index) => {
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self.validate_argument(
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3,
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Capability::Index.into(),
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token_info.line_num,
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token_info.line_pos,
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)?;
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index = (self.tokens.expect_number(u16::MAX as usize)? as i32).into();
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}
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Token::Tag(Word::Last) => {
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self.validate_argument(
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4,
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Capability::Index.into(),
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token_info.line_num,
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token_info.line_pos,
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)?;
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index_last = true;
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}
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Token::Tag(Word::Mime) => {
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self.validate_argument(
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5,
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Capability::Mime.into(),
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token_info.line_num,
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token_info.line_pos,
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)?;
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mime = true;
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}
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Token::Tag(Word::AnyChild) => {
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self.validate_argument(
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6,
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Capability::Mime.into(),
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token_info.line_num,
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token_info.line_pos,
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)?;
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mime_anychild = true;
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}
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Token::Tag(Word::OriginalZone) => {
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self.validate_argument(7, None, token_info.line_num, token_info.line_pos)?;
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zone = Zone::Original;
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}
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Token::Tag(Word::Zone) => {
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self.validate_argument(7, None, token_info.line_num, token_info.line_pos)?;
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zone = Zone::Time(self.parse_timezone()?);
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}
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_ => {
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if header_name.is_none() {
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let header = self.parse_string_token(token_info)?;
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if let Value::Text(header_name) = &header {
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if HeaderName::parse(header_name).is_none() {
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return Err(self
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.tokens
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.unwrap_next()?
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.custom(ErrorType::InvalidHeaderName));
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}
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}
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header_name = header.into();
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} else if date_part.is_none() {
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if let Token::StringConstant(string) = &token_info.token {
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if let Some(date_part_) =
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DATE_PART.get(&string.to_string().to_ascii_lowercase())
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{
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date_part = (*date_part_).into();
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continue;
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}
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}
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return Err(token_info.expected("valid date part"));
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} else {
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key_list = self.parse_strings_token(token_info)?;
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break;
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}
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}
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}
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}
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if !mime && mime_anychild {
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return Err(self.tokens.unwrap_next()?.missing_tag(":mime"));
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}
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self.validate_match(&match_type, &mut key_list)?;
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Ok(Test::Date(TestDate {
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header_name: header_name.unwrap(),
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key_list,
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date_part: date_part.unwrap(),
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match_type,
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comparator,
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index: if index_last { index.map(|i| -i) } else { index },
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zone,
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mime_anychild,
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is_not: false,
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}))
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}
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pub(crate) fn parse_test_currentdate(&mut self) -> Result<Test, CompileError> {
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let mut match_type = MatchType::Is;
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let mut comparator = Comparator::AsciiCaseMap;
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let mut key_list;
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let mut zone = None;
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let mut date_part = None;
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loop {
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let token_info = self.tokens.unwrap_next()?;
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match token_info.token {
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Token::Tag(
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word @ (Word::Is
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| Word::Contains
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| Word::Matches
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| Word::Value
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| Word::Count
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| Word::Regex
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| Word::List),
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) => {
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self.validate_argument(
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1,
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match word {
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Word::Value | Word::Count => Capability::Relational.into(),
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Word::Regex => Capability::Regex.into(),
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Word::List => Capability::ExtLists.into(),
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_ => None,
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},
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token_info.line_num,
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token_info.line_pos,
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)?;
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match_type = self.parse_match_type(word)?;
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}
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Token::Tag(Word::Comparator) => {
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self.validate_argument(2, None, token_info.line_num, token_info.line_pos)?;
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comparator = self.parse_comparator()?;
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}
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Token::Tag(Word::Zone) => {
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self.validate_argument(3, None, token_info.line_num, token_info.line_pos)?;
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zone = self.parse_timezone()?.into();
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}
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_ => {
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if date_part.is_none() {
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if let Token::StringConstant(string) = &token_info.token {
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if let Some(date_part_) =
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DATE_PART.get(&string.to_string().to_ascii_lowercase())
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{
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date_part = (*date_part_).into();
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continue;
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}
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}
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return Err(token_info.expected("valid date part"));
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} else {
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key_list = self.parse_strings_token(token_info)?;
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break;
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}
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}
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}
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}
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self.validate_match(&match_type, &mut key_list)?;
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Ok(Test::CurrentDate(TestCurrentDate {
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key_list,
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date_part: date_part.unwrap(),
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match_type,
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comparator,
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zone,
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is_not: false,
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}))
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}
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pub(crate) fn parse_timezone(&mut self) -> Result<i64, CompileError> {
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let token_info = self.tokens.unwrap_next()?;
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if let Token::StringConstant(value) = &token_info.token {
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let timezone = match value {
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StringConstant::String(value) => value.parse::<i64>().unwrap_or(i64::MAX),
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StringConstant::Number(Number::Integer(n)) => *n,
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StringConstant::Number(Number::Float(n)) => *n as i64,
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};
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return match timezone {
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0..=1400 => Ok((timezone / 100 * 3600) + (timezone % 100 * 60)),
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-1200..=-1 => Ok((timezone / 100 * 3600) - (-timezone % 100 * 60)),
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_ => Err(token_info.expected("invalid timezone")),
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};
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}
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Err(token_info.expected("string containing time zone"))
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}
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}
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/*
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"year" => the year, "0000" .. "9999".
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"month" => the month, "01" .. "12".
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"day" => the day, "01" .. "31".
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"date" => the date in "yyyy-mm-dd" format.
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"julian" => the Modified Julian Day, that is, the date
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expressed as an integer number of days since
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00:00 UTC on November 17, 1858 (using the Gregorian
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calendar). This corresponds to the regular
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Julian Day minus 2400000.5. Sample routines to
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convert to and from modified Julian dates are
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given in Appendix A.
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"hour" => the hour, "00" .. "23".
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"minute" => the minute, "00" .. "59".
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"second" => the second, "00" .. "60".
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"time" => the time in "hh:mm:ss" format.
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"iso8601" => the date and time in restricted ISO 8601 format.
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"std11" => the date and time in a format appropriate
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for use in a Date: header field [RFC2822].
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"zone" => the time zone in use. If the user specified a
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time zone with ":zone", "zone" will
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contain that value. If :originalzone is specified
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this value will be the original zone specified
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in the date-time value. If neither argument is
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specified the value will be the server's default
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time zone in offset format "+hhmm" or "-hhmm". An
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offset of 0 (Zulu) always has a positive sign.
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"weekday" => the day of the week expressed as an integer between
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"0" and "6". "0" is Sunday, "1" is Monday, etc.
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*/
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static DATE_PART: phf::Map<&'static str, DatePart> = phf_map! {
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"year" => DatePart::Year,
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"month" => DatePart::Month,
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"day" => DatePart::Day,
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"date" => DatePart::Date,
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"julian" => DatePart::Julian,
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"hour" => DatePart::Hour,
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"minute" => DatePart::Minute,
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"second" => DatePart::Second,
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"time" => DatePart::Time,
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"iso8601" => DatePart::Iso8601,
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"std11" => DatePart::Std11,
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"zone" => DatePart::Zone,
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"weekday" => DatePart::Weekday,
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};
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