mirror of https://git.meli.delivery/meli/meli
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/*
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* meli - mailbox 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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extern crate fnv;
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use self::fnv::FnvHashMap;
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mod backend;
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pub use self::backend::*;
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use error::{MeliError, Result};
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use mailbox::backends::*;
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use mailbox::email::parser;
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use mailbox::email::{Envelope, Flag};
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use memmap::{Mmap, Protection};
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use std::collections::hash_map::DefaultHasher;
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use std::fs;
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use std::hash::{Hash, Hasher};
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use std::path::{Path, PathBuf};
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use std::sync::{Arc, Mutex};
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/// `BackendOp` implementor for Maildir
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#[derive(Debug)]
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pub struct MaildirOp {
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hash_index: Arc<Mutex<FnvHashMap<EnvelopeHash, (usize, PathBuf)>>>,
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hash: EnvelopeHash,
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slice: Option<Mmap>,
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}
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impl Clone for MaildirOp {
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fn clone(&self) -> Self {
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MaildirOp {
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hash_index: self.hash_index.clone(),
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hash: self.hash,
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slice: None,
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}
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}
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}
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impl MaildirOp {
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pub fn new(
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hash: EnvelopeHash,
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hash_index: Arc<Mutex<FnvHashMap<EnvelopeHash, (usize, PathBuf)>>>,
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) -> Self {
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MaildirOp {
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hash_index,
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hash,
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slice: None,
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}
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}
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fn path(&self) -> PathBuf {
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let hash_index = self.hash_index.clone();
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let map = hash_index.lock().unwrap();
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map.get(&self.hash).unwrap().1.clone()
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}
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}
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impl<'a> BackendOp for MaildirOp {
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fn description(&self) -> String {
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format!("Path of file: {}", self.path().display())
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}
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fn as_bytes(&mut self) -> Result<&[u8]> {
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if self.slice.is_none() {
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self.slice = Some(Mmap::open_path(self.path(), Protection::Read)?);
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}
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/* Unwrap is safe since we use ? above. */
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Ok(unsafe { self.slice.as_ref().unwrap().as_slice() })
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}
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fn fetch_headers(&mut self) -> Result<&[u8]> {
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let raw = self.as_bytes()?;
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let result = parser::headers_raw(raw).to_full_result()?;
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Ok(result)
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}
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fn fetch_body(&mut self) -> Result<&[u8]> {
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let raw = self.as_bytes()?;
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let result = parser::headers_raw(raw).to_full_result()?;
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Ok(result)
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}
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fn fetch_flags(&self) -> Flag {
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let mut flag = Flag::default();
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let path = self.path();
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let path = path.to_str().unwrap(); // Assume UTF-8 validity
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if !path.contains(":2,") {
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return flag;
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}
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for f in path.chars().rev() {
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match f {
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',' => break,
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'D' => flag |= Flag::DRAFT,
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'F' => flag |= Flag::FLAGGED,
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'P' => flag |= Flag::PASSED,
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'R' => flag |= Flag::REPLIED,
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'S' => flag |= Flag::SEEN,
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'T' => flag |= Flag::TRASHED,
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_ => panic!(),
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}
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}
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flag
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}
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fn set_flag(&mut self, envelope: &mut Envelope, f: &Flag) -> Result<()> {
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let path = self.path();
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let path = path.to_str().unwrap(); // Assume UTF-8 validity
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let idx: usize = path
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.rfind(":2,")
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.ok_or_else(|| MeliError::new(format!("Invalid email filename: {:?}", self)))?
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+ 3;
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let mut new_name: String = path[..idx].to_string();
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let mut flags = self.fetch_flags();
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if !(flags & *f).is_empty() {
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return Ok(());
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}
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flags.toggle(*f);
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if !(flags & Flag::DRAFT).is_empty() {
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new_name.push('D');
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}
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if !(flags & Flag::FLAGGED).is_empty() {
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new_name.push('F');
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}
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if !(flags & Flag::PASSED).is_empty() {
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new_name.push('P');
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}
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if !(flags & Flag::REPLIED).is_empty() {
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new_name.push('R');
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}
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if !(flags & Flag::SEEN).is_empty() {
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new_name.push('S');
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}
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if !(flags & Flag::TRASHED).is_empty() {
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new_name.push('T');
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}
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fs::rename(&path, &new_name)?;
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let hash = envelope.hash();
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let hash_index = self.hash_index.clone();
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let mut map = hash_index.lock().unwrap();
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map.get_mut(&hash).unwrap().1 = PathBuf::from(new_name);
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Ok(())
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}
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}
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#[derive(Debug, Default)]
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pub struct MaildirFolder {
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hash: FolderHash,
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name: String,
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path: PathBuf,
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children: Vec<usize>,
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}
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impl MaildirFolder {
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pub fn new(path: String, file_name: String, children: Vec<usize>) -> Result<Self> {
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let pathbuf = PathBuf::from(path);
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let mut h = DefaultHasher::new();
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pathbuf.hash(&mut h);
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let ret = MaildirFolder {
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hash: h.finish(),
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name: file_name,
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path: pathbuf,
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children,
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};
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ret.is_valid()?;
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Ok(ret)
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}
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pub fn path(&self) -> &Path {
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self.path.as_path()
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}
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fn is_valid(&self) -> Result<()> {
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let path = self.path();
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let mut p = PathBuf::from(path);
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for d in &["cur", "new", "tmp"] {
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p.push(d);
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if !p.is_dir() {
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return Err(MeliError::new(format!(
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"{} is not a valid maildir folder",
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path.display()
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)));
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}
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p.pop();
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}
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Ok(())
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}
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}
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impl BackendFolder for MaildirFolder {
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fn hash(&self) -> FolderHash {
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self.hash
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}
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fn name(&self) -> &str {
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&self.name
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}
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fn change_name(&mut self, s: &str) {
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self.name = s.to_string();
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}
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fn children(&self) -> &Vec<usize> {
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&self.children
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}
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fn clone(&self) -> Folder {
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Box::new(MaildirFolder {
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hash: self.hash,
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name: self.name.clone(),
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path: self.path.clone(),
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children: self.children.clone(),
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})
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}
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}
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