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458 lines
13 KiB
Rust
458 lines
13 KiB
Rust
/*
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* meli - email module
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*
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* Copyright 2017 Manos Pitsidianakis
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*
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* This file is part of meli.
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*
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* meli is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* meli 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with meli. If not, see <http://www.gnu.org/licenses/>.
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*/
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pub mod parser;
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mod attachments;
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use mailbox::backends::BackendOpGenerator;
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use self::attachments::*;
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use std::string::String;
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use std::sync::Arc;
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//use std;
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use std::cmp::Ordering;
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use std::fmt;
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use std::option::Option;
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//use std::io::prelude::*;
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use std::ascii::AsciiExt;
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use chrono;
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use chrono::TimeZone;
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/* Helper struct to return slices from a struct on demand */
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#[derive(Clone, Debug)]
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struct StrBuilder {
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offset: usize,
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length: usize,
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}
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pub trait StrBuild {
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fn new(&str, &str) -> Self;
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fn get_raw(&self) -> &str;
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fn get_val(&self) -> &str;
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}
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#[derive(Clone)]
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pub struct MessageID(String, StrBuilder);
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impl StrBuild for MessageID {
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fn new(string: &str, slice: &str) -> Self {
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let offset = string.find(slice).unwrap();
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MessageID(
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string.to_string(),
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StrBuilder {
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offset: offset,
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length: slice.len() + 1,
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},
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)
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}
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fn get_raw(&self) -> &str {
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let offset = self.1.offset;
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let length = self.1.length;
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&self.0[offset..length]
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}
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fn get_val(&self) -> &str {
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&self.0
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}
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}
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#[test]
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fn test_strbuilder() {
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let m_id = "<20170825132332.6734-1-el13635@mail.ntua.gr>";
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let (_, slice) = parser::message_id(m_id.as_bytes()).unwrap();
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assert_eq!(
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MessageID::new(m_id, slice),
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MessageID(
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m_id.to_string(),
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StrBuilder {
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offset: 1,
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length: 43,
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}
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)
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);
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}
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impl PartialEq for MessageID {
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fn eq(&self, other: &MessageID) -> bool {
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self.get_raw() == other.get_raw()
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}
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}
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impl fmt::Debug for MessageID {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}", self.get_raw())
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}
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}
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#[derive(Clone, Debug)]
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struct References {
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raw: String,
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refs: Vec<MessageID>,
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}
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bitflags! {
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#[derive(Default)]
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pub struct Flag: u8 {
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const PASSED = 0b00000001;
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const REPLIED = 0b00000010;
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const SEEN = 0b00000100;
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const TRASHED = 0b00001000;
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const DRAFT = 0b00010000;
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const FLAGGED = 0b00100000;
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}
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}
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/* A very primitive mail object */
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#[derive(Debug, Clone)]
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pub struct Envelope {
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date: String,
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from: Option<String>,
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to: Option<String>,
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body: Option<Attachment>,
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subject: Option<String>,
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message_id: Option<MessageID>,
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in_reply_to: Option<MessageID>,
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references: Option<References>,
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datetime: Option<chrono::DateTime<chrono::FixedOffset>>,
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timestamp: i64,
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thread: usize,
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operation_token: Arc<Box<BackendOpGenerator>>,
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flags: Flag,
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}
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impl Envelope {
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pub fn get_date(&self) -> i64 {
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self.timestamp
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}
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pub fn get_datetime(&self) -> chrono::DateTime<chrono::FixedOffset> {
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self.datetime.unwrap_or_else(|| {
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chrono::FixedOffset::west(0)
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.ymd(1970, 1, 1)
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.and_hms(0, 0, 0)
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})
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}
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pub fn get_date_as_str(&self) -> &str {
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&self.date
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}
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pub fn get_from(&self) -> &str {
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match self.from {
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Some(ref s) => s,
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None => "",
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}
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}
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pub fn get_to(&self) -> &str {
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match self.to {
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Some(ref s) => s,
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None => "",
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}
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}
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pub fn get_body(&self) -> Attachment {
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let mut operation = self.operation_token.generate();
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let file = operation.as_bytes();
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let (headers, body) = match parser::mail(file.unwrap()).to_full_result() {
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Ok(v) => v,
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Err(_) => {
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let operation = self.operation_token.generate();
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eprintln!("error in parsing mail\n{}", operation.description());
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panic!()
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}
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};
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let mut builder = AttachmentBuilder::new(body);
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for (name, value) in headers {
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if value.len() == 1 && value.is_empty() {
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continue;
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}
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if name.eq_ignore_ascii_case("content-transfer-encoding") {
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builder.content_transfer_encoding(value);
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} else if name.eq_ignore_ascii_case("content-type") {
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builder.content_type(value);
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}
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}
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builder.build()
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}
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pub fn get_subject(&self) -> &str {
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match self.subject {
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Some(ref s) => s,
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_ => "",
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}
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}
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pub fn get_in_reply_to(&self) -> &str {
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match self.in_reply_to {
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Some(ref s) => s.get_val(),
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_ => "",
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}
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}
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pub fn get_in_reply_to_raw(&self) -> &str {
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match self.in_reply_to {
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Some(ref s) => s.get_raw(),
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_ => "",
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}
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}
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pub fn get_message_id(&self) -> &str {
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match self.message_id {
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Some(ref s) => s.get_val(),
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_ => "",
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}
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}
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pub fn get_message_id_raw(&self) -> &str {
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match self.message_id {
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Some(ref s) => s.get_raw(),
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_ => "",
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}
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}
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fn set_date(&mut self, new_val: String) -> () {
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self.date = new_val;
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}
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fn set_from(&mut self, new_val: String) -> () {
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self.from = Some(new_val);
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}
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fn set_to(&mut self, new_val: String) -> () {
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self.to = Some(new_val);
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}
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fn set_in_reply_to(&mut self, new_val: &str) -> () {
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let slice = match parser::message_id(new_val.as_bytes()).to_full_result() {
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Ok(v) => v,
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Err(v) => {
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eprintln!("{} {:?}", new_val, v);
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self.in_reply_to = None;
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return;
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}
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};
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self.in_reply_to = Some(MessageID::new(new_val, slice));
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}
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fn set_subject(&mut self, new_val: String) -> () {
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self.subject = Some(new_val);
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}
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fn set_message_id(&mut self, new_val: &str) -> () {
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let slice = match parser::message_id(new_val.as_bytes()).to_full_result() {
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Ok(v) => v,
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Err(v) => {
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eprintln!("{} {:?}", new_val, v);
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self.message_id = None;
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return;
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}
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};
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self.message_id = Some(MessageID::new(new_val, slice));
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}
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fn push_references(&mut self, new_val: &str) -> () {
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let slice = match parser::message_id(new_val.as_bytes()).to_full_result() {
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Ok(v) => v,
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Err(v) => {
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eprintln!("{} {:?}", new_val, v);
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return;
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}
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};
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let new_ref = MessageID::new(new_val, slice);
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match self.references {
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Some(ref mut s) => {
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if s.refs.contains(&new_ref) {
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if s.refs[s.refs.len() - 1] != new_ref {
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if let Some(index) = s.refs.iter().position(|x| *x == new_ref) {
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s.refs.remove(index);
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} else {
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panic!();
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}
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} else {
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return;
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}
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}
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s.refs.push(new_ref);
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}
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None => {
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let mut v = Vec::new();
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v.push(new_ref);
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self.references = Some(References {
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raw: "".to_string(),
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refs: v,
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});
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}
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}
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}
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fn set_references(&mut self, new_val: String) -> () {
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match self.references {
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Some(ref mut s) => {
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s.raw = new_val;
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}
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None => {
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let v = Vec::new();
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self.references = Some(References {
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raw: new_val,
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refs: v,
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});
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}
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}
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}
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pub fn get_references(&self) -> Vec<&MessageID> {
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match self.references {
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Some(ref s) => s.refs
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.iter()
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.fold(Vec::with_capacity(s.refs.len()), |mut acc, x| {
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acc.push(x);
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acc
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}),
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None => Vec::new(),
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}
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}
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pub fn set_body(&mut self, new_val: Attachment) -> () {
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self.body = Some(new_val);
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}
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pub fn get_thread(&self) -> usize {
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self.thread
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}
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pub fn set_thread(&mut self, new_val: usize) -> () {
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self.thread = new_val;
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}
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pub fn set_datetime(&mut self, new_val: Option<chrono::DateTime<chrono::FixedOffset>>) -> () {
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self.datetime = new_val;
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if let Some(v) = self.datetime {
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self.timestamp = v.timestamp();
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}
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}
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pub fn get_flags(&self) -> Flag {
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self.flags
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}
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pub fn is_seen(&self) -> bool {
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!(self.flags & Flag::SEEN).is_empty()
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}
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pub fn new(token: Box<BackendOpGenerator>) -> Self {
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Envelope {
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date: "".to_string(),
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from: None,
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to: None,
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body: None,
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subject: None,
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message_id: None,
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in_reply_to: None,
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references: None,
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datetime: None,
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timestamp: 0,
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thread: 0,
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operation_token: Arc::new(token),
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flags: Flag::default(),
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}
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}
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pub fn from(operation_token: Box<BackendOpGenerator>) -> Option<Envelope> {
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let operation = operation_token.generate();
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let mut e = Envelope::new(operation_token);
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e.flags = operation.fetch_flags();
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Some(e)
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}
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pub fn populate_headers(&mut self) -> () {
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let mut operation = self.operation_token.generate();
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let headers = match parser::headers(operation.fetch_headers().unwrap()).to_full_result() {
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Ok(v) => v,
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_ => {
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let operation = self.operation_token.generate();
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eprintln!("error in parsing mail\n{}", operation.description());
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return;
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}
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};
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let mut in_reply_to = None;
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let mut datetime = None;
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for (name, value) in headers {
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if value.len() == 1 && value.is_empty() {
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continue;
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}
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if name.eq_ignore_ascii_case("to") {
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let parse_result = parser::subject(value.as_bytes());
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let value = if parse_result.is_done() {
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parse_result.to_full_result().unwrap()
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} else {
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"".to_string()
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};
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self.set_to(value);
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} else if name.eq_ignore_ascii_case("from") {
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let parse_result = parser::subject(value.as_bytes());
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let value = if parse_result.is_done() {
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parse_result.to_full_result().unwrap()
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} else {
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"".to_string()
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};
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self.set_from(value);
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} else if name.eq_ignore_ascii_case("subject") {
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let parse_result = parser::subject(value.trim().as_bytes());
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let value = if parse_result.is_done() {
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parse_result.to_full_result().unwrap()
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} else {
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"".to_string()
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};
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self.set_subject(value);
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} else if name.eq_ignore_ascii_case("message-id") {
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self.set_message_id(value);
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} else if name.eq_ignore_ascii_case("references") {
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{
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let parse_result = parser::references(value.as_bytes());
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if parse_result.is_done() {
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for v in parse_result.to_full_result().unwrap() {
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self.push_references(v);
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}
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}
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}
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self.set_references(value.to_string());
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} else if name.eq_ignore_ascii_case("in-reply-to") {
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self.set_in_reply_to(value);
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in_reply_to = Some(value);
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} else if name.eq_ignore_ascii_case("date") {
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self.set_date(value.to_string());
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datetime = Some(value.to_string());
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}
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}
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/*
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* https://tools.ietf.org/html/rfc5322#section-3.6.4
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*
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* if self.message_id.is_none() { ...
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*/
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if let Some(ref mut x) = in_reply_to {
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self.push_references(x);
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}
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if let Some(ref mut d) = datetime {
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self.set_datetime(parser::date(d));
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}
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}
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}
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impl Eq for Envelope {}
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impl Ord for Envelope {
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fn cmp(&self, other: &Envelope) -> Ordering {
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self.get_datetime().cmp(&other.get_datetime())
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}
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}
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impl PartialOrd for Envelope {
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fn partial_cmp(&self, other: &Envelope) -> Option<Ordering> {
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Some(self.cmp(other))
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}
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}
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impl PartialEq for Envelope {
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fn eq(&self, other: &Envelope) -> bool {
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self.get_message_id_raw() == other.get_message_id_raw()
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}
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}
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