431 lines
18 KiB
Rust
431 lines
18 KiB
Rust
/*
|
|
* meli - mailbox module.
|
|
*
|
|
* Copyright 2017 Manos Pitsidianakis
|
|
*
|
|
* This file is part of meli.
|
|
*
|
|
* meli is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* meli 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with meli. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
pub mod email;
|
|
pub use self::email::*;
|
|
/* Mail backends. Currently only maildir is supported */
|
|
pub mod backends;
|
|
use mailbox::backends::MailBackend;
|
|
use mailbox::backends::maildir;
|
|
use error::Result;
|
|
pub mod accounts;
|
|
pub use mailbox::accounts::Account;
|
|
|
|
extern crate fnv;
|
|
|
|
use self::fnv::FnvHashMap;
|
|
use std::option::Option;
|
|
use std;
|
|
|
|
type UnixTimestamp = i64;
|
|
|
|
/*a Mailbox represents a folder of mail. Currently only Maildir is supported.*/
|
|
#[derive(Debug,Clone)]
|
|
pub struct Mailbox{
|
|
pub path: String,
|
|
pub collection: Vec<Mail>,
|
|
pub threaded_collection: Vec<usize>,
|
|
threads: Vec<Thread>,
|
|
length: usize,
|
|
}
|
|
|
|
/* a Thread struct is needed to describe the Thread tree forest during creation
|
|
* of threads. Because of Rust's memory model, we store indexes of other node
|
|
* instead of references and every reference is passed through the Thread owner
|
|
* (a Vec<Thread>).
|
|
*
|
|
* message refers to a Mail entry in a Vec. If it's empty, the Thread is
|
|
* nonexistent in our Mailbox but we know it exists (for example we have a copy
|
|
* of a reply to a mail but we don't have its copy.
|
|
*/
|
|
#[derive(Clone, Copy, Debug)]
|
|
pub struct Thread {
|
|
id: usize,
|
|
message: Option<usize>,
|
|
parent: Option<usize>,
|
|
first_child: Option<usize>,
|
|
next_sibling: Option<usize>,
|
|
date: UnixTimestamp,
|
|
indentation: usize,
|
|
show_subject: bool,
|
|
}
|
|
|
|
impl Thread {
|
|
pub fn get_message(&self) -> Option<usize> {
|
|
self.message
|
|
}
|
|
pub fn get_parent(&self) -> Option<usize> {
|
|
self.parent
|
|
}
|
|
pub fn has_parent(&self) -> bool {
|
|
self.parent.is_some()
|
|
}
|
|
pub fn get_first_child(&self) -> Option<usize> {
|
|
self.first_child
|
|
}
|
|
pub fn get_next_sibling(&self) -> Option<usize> {
|
|
self.next_sibling
|
|
}
|
|
pub fn has_children(&self) -> bool {
|
|
self.first_child.is_some()
|
|
}
|
|
pub fn has_sibling(&self) -> bool {
|
|
self.next_sibling.is_some()
|
|
}
|
|
pub fn has_message(&self) -> bool {
|
|
self.message.is_some()
|
|
}
|
|
fn set_indentation(&mut self, i: usize) {
|
|
self.indentation = i;
|
|
}
|
|
pub fn get_indentation(&self) -> usize {
|
|
self.indentation
|
|
}
|
|
fn is_descendant(&self, threads: &[Thread], other: &Thread) -> bool {
|
|
if self == other {
|
|
return true;
|
|
}
|
|
|
|
if let Some(v) = self.first_child {
|
|
if threads[v].is_descendant(threads, other) {
|
|
return true;
|
|
}
|
|
};
|
|
if let Some(v) = self.next_sibling {
|
|
if threads[v].is_descendant(threads, other) {
|
|
return true;
|
|
}
|
|
};
|
|
false
|
|
}
|
|
fn set_show_subject(&mut self, set: bool) -> () {
|
|
self.show_subject = set;
|
|
}
|
|
pub fn get_show_subject(&self) -> bool {
|
|
self.show_subject
|
|
}
|
|
}
|
|
|
|
impl PartialEq for Thread {
|
|
fn eq(&self, other: &Thread) -> bool {
|
|
match (self.message, other.message) {
|
|
(Some(s), Some(o)) => {
|
|
s == o
|
|
},
|
|
_ => {
|
|
self.id == other.id
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn build_collection(threads: &mut Vec<Thread>, id_table: &mut FnvHashMap<std::string::String, usize>, collection: &mut [Mail]) -> ()
|
|
{
|
|
for (i, x) in collection.iter_mut().enumerate() {
|
|
let x_index; /* x's index in threads */
|
|
let m_id = x.get_message_id_raw().to_string();
|
|
if id_table.contains_key(&m_id) {
|
|
let t = id_table[&m_id];
|
|
/* the already existing Thread should be empty, since we're
|
|
* seeing this message for the first time */
|
|
if threads[t].message.is_some() {
|
|
/* skip duplicate message-id, but this should be handled instead */
|
|
continue;
|
|
}
|
|
x_index = t;
|
|
/* Store this message in the Thread's message slot. */
|
|
threads[t].date = x.get_date();
|
|
x.set_thread(t);
|
|
threads[t].message = Some(i);
|
|
} else {
|
|
/* Create a new Thread object holding this message */
|
|
x_index = threads.len();
|
|
threads.push(
|
|
Thread {
|
|
message: Some(i),
|
|
id: x_index,
|
|
parent: None,
|
|
first_child: None,
|
|
next_sibling: None,
|
|
date: x.get_date(),
|
|
indentation: 0,
|
|
show_subject: true,
|
|
});
|
|
x.set_thread(x_index);
|
|
id_table.insert(m_id, x_index);
|
|
}
|
|
/* For each element in the message's References field:
|
|
*
|
|
* Find a Thread object for the given Message-ID:
|
|
* If there's one in id_table use that;
|
|
* Otherwise, make (and index) one with a null Message
|
|
*
|
|
* Link the References field's Threads together in the order implied by the References header.
|
|
* If they are already linked, don't change the existing links.
|
|
* Do not add a link if adding that link would introduce a loop: that is, before asserting A->B, search down the children of B to see if A is reachable, and also search down the children of A to see if B is reachable. If either is already reachable as a child of the other, don't add the link.
|
|
*/
|
|
let mut curr_ref = x_index;
|
|
for &r in x.get_references().iter().rev() {
|
|
let parent_id =
|
|
if id_table.contains_key(r.get_raw()) {
|
|
let p = id_table[r.get_raw()];
|
|
if !(threads[p].is_descendant(threads, &threads[curr_ref]) ||
|
|
threads[curr_ref].is_descendant(threads, &threads[p])) {
|
|
threads[curr_ref].parent = Some(p);
|
|
if threads[p].first_child.is_none() {
|
|
threads[p].first_child = Some(curr_ref);
|
|
} else {
|
|
let mut child_iter = threads[p].first_child.unwrap();
|
|
while threads[child_iter].next_sibling.is_some() {
|
|
threads[child_iter].parent = Some(p);
|
|
child_iter = threads[child_iter].next_sibling.unwrap();
|
|
}
|
|
threads[child_iter].next_sibling = Some(curr_ref);
|
|
threads[child_iter].parent = Some(p);
|
|
}
|
|
}
|
|
p
|
|
} else {
|
|
let idx = threads.len();
|
|
threads.push(
|
|
Thread {
|
|
message: None,
|
|
id: idx,
|
|
parent: None,
|
|
first_child: Some(curr_ref),
|
|
next_sibling: None,
|
|
date: x.get_date(),
|
|
indentation: 0,
|
|
show_subject: true,
|
|
});
|
|
id_table.insert(r.get_raw().to_string(), idx);
|
|
idx
|
|
};
|
|
/* update thread date */
|
|
let mut parent_iter = parent_id;
|
|
'date: loop {
|
|
let p = &mut threads[parent_iter];
|
|
if p.date < x.get_date() {
|
|
p.date = x.get_date();
|
|
}
|
|
match p.parent {
|
|
Some(p) => { parent_iter = p; },
|
|
None => { break 'date; },
|
|
}
|
|
}
|
|
curr_ref = parent_id;
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Mailbox
|
|
{
|
|
pub fn new(path: &str, sent_folder: &Option<Result<Mailbox>>) -> Result<Mailbox> {
|
|
let mut collection: Vec<Mail> = maildir::MaildirType::new(path).get()?;
|
|
/* To reconstruct thread information from the mails we need: */
|
|
|
|
/* a vector to hold thread members */
|
|
let mut threads: Vec<Thread> = Vec::with_capacity((collection.len() as f64 * 1.2) as usize);
|
|
/* A hash table of Message IDs */
|
|
let mut id_table: FnvHashMap<std::string::String, usize> = FnvHashMap::with_capacity_and_hasher(collection.len(), Default::default());
|
|
|
|
collection.sort_by(|a, b| a.get_date().cmp(&b.get_date()));
|
|
/* Add each message to id_table and threads, and link them together according to the
|
|
* References / In-Reply-To headers */
|
|
build_collection(&mut threads, &mut id_table, &mut collection);
|
|
let mut idx = collection.len();
|
|
let mut tidx = threads.len();
|
|
/* Link messages from Sent folder if they are relevant to this folder.
|
|
* This means that
|
|
* - if a message from Sent is a reply to a message in this folder, we will
|
|
* add it to the threading (but not the collection; non-threading users shouldn't care
|
|
* about this)
|
|
* - if a message in this folder is a reply to a message we sent, we will add it to the
|
|
* threading
|
|
*/
|
|
|
|
if let &Some(ref sent_box) = sent_folder {
|
|
if sent_box.is_ok() {
|
|
let sent_mailbox = sent_box.as_ref();
|
|
let sent_mailbox = sent_mailbox.unwrap();;
|
|
|
|
for ref x in &sent_mailbox.collection {
|
|
if id_table.contains_key(x.get_message_id_raw()) ||
|
|
(!x.get_in_reply_to_raw().is_empty() && id_table.contains_key(x.get_in_reply_to_raw())) {
|
|
let mut x: Mail = (*x).clone();
|
|
if id_table.contains_key(x.get_message_id_raw()) {
|
|
let c = id_table[x.get_message_id_raw()];
|
|
if threads[c].message.is_some() {
|
|
/* skip duplicate message-id, but this should be handled instead */
|
|
continue;
|
|
}
|
|
threads[c].message = Some(idx);
|
|
assert!(threads[c].has_children());
|
|
threads[c].date = x.get_date();
|
|
x.set_thread(c);
|
|
} else if !x.get_in_reply_to_raw().is_empty() && id_table.contains_key(x.get_in_reply_to_raw()) {
|
|
let p = id_table[x.get_in_reply_to_raw()];
|
|
let c = if id_table.contains_key(x.get_message_id_raw()) {
|
|
id_table[x.get_message_id_raw()]
|
|
} else {
|
|
threads.push(
|
|
Thread {
|
|
message: Some(idx),
|
|
id: tidx,
|
|
parent: Some(p),
|
|
first_child: None,
|
|
next_sibling: None,
|
|
date: x.get_date(),
|
|
indentation: 0,
|
|
show_subject: true,
|
|
});
|
|
id_table.insert(x.get_message_id_raw().to_string(), tidx);
|
|
x.set_thread(tidx);
|
|
tidx += 1;
|
|
tidx - 1
|
|
};
|
|
threads[c].parent = Some(p);
|
|
if threads[p].is_descendant(&threads, &threads[c]) ||
|
|
threads[c].is_descendant(&threads, &threads[p]) {
|
|
continue;
|
|
}
|
|
if threads[p].first_child.is_none() {
|
|
threads[p].first_child = Some(c);
|
|
} else {
|
|
let mut fc = threads[p].first_child.unwrap();
|
|
while threads[fc].next_sibling.is_some() {
|
|
threads[fc].parent = Some(p);
|
|
fc = threads[fc].next_sibling.unwrap();
|
|
}
|
|
threads[fc].next_sibling = Some(c);
|
|
threads[fc].parent = Some(p);
|
|
}
|
|
/* update thread date */
|
|
let mut parent_iter = p;
|
|
'date: loop {
|
|
let p = &mut threads[parent_iter];
|
|
if p.date < x.get_date() {
|
|
p.date = x.get_date();
|
|
}
|
|
match p.parent {
|
|
Some(p) => { parent_iter = p; },
|
|
None => { break 'date; },
|
|
}
|
|
}
|
|
}
|
|
collection.push(x);
|
|
idx += 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* Walk over the elements of id_table, and gather a list of the Thread objects that have
|
|
* no parents. These are the root messages of each thread */
|
|
let mut root_set = Vec::with_capacity(collection.len());
|
|
'root_set: for v in id_table.values() {
|
|
if threads[*v].parent.is_none() {
|
|
if !threads[*v].has_message() && threads[*v].has_children() && !threads[threads[*v].first_child.unwrap()].has_sibling() {
|
|
/* Do not promote the children if doing so would promote them to the root set
|
|
* -- unless there is only one child, in which case, do. */
|
|
root_set.push(threads[*v].first_child.unwrap());
|
|
continue 'root_set;
|
|
}
|
|
root_set.push(*v);
|
|
}
|
|
}
|
|
root_set.sort_by(|a, b| threads[*b].date.cmp(&threads[*a].date));
|
|
|
|
/* Group messages together by thread in a collection so we can print them together */
|
|
let mut threaded_collection: Vec<usize> = Vec::with_capacity(collection.len());
|
|
fn build_threaded(threads: &mut Vec<Thread>, indentation: usize, threaded: &mut Vec<usize>, i: usize, root_subject_idx: usize, collection: &[Mail])
|
|
{
|
|
let thread = threads[i];
|
|
if threads[root_subject_idx].has_message() {
|
|
let root_subject = collection[threads[root_subject_idx].get_message().unwrap()].get_subject();
|
|
/* If the Container has no Message, but does have children, remove this container but
|
|
* promote its children to this level (that is, splice them in to the current child
|
|
* list.) */
|
|
if indentation > 0 && thread.has_message() {
|
|
let subject = collection[thread.get_message().unwrap()].get_subject();
|
|
if subject == root_subject || subject.starts_with("Re: ") && subject.ends_with(root_subject) {
|
|
threads[i].set_show_subject(false);
|
|
}
|
|
}
|
|
}
|
|
if thread.has_parent() && !threads[thread.get_parent().unwrap()].has_message() {
|
|
threads[i].parent = None;
|
|
}
|
|
let indentation =
|
|
if thread.has_message() {
|
|
threads[i].set_indentation(indentation);
|
|
if !threaded.contains(&i) {
|
|
threaded.push(i);
|
|
}
|
|
indentation + 1
|
|
} else if indentation > 0 {
|
|
indentation
|
|
} else {
|
|
indentation + 1
|
|
};
|
|
if thread.has_children() {
|
|
let mut fc = thread.get_first_child().unwrap();
|
|
loop {
|
|
build_threaded(threads, indentation, threaded, fc, i, collection);
|
|
let thread_ = threads[fc];
|
|
if !thread_.has_sibling() {
|
|
break;
|
|
}
|
|
fc = thread_.get_next_sibling().unwrap();
|
|
}
|
|
}
|
|
}
|
|
for i in &root_set {
|
|
build_threaded(&mut threads, 0, &mut threaded_collection, *i, *i, &collection);
|
|
}
|
|
|
|
let length = collection.len();
|
|
|
|
Ok(Mailbox {
|
|
path: path.to_string(),
|
|
collection: collection,
|
|
threads: threads,
|
|
length: length,
|
|
threaded_collection: threaded_collection,
|
|
})
|
|
}
|
|
pub fn get_length(&self) -> usize {
|
|
self.length
|
|
}
|
|
pub fn get_threaded_mail(&self, i: usize) -> usize {
|
|
let thread = self.threads[self.threaded_collection[i]];
|
|
thread.get_message().unwrap()
|
|
}
|
|
pub fn get_mail_and_thread(&mut self, i: usize) -> (&mut Mail, Thread) {
|
|
let x = &mut self.collection.as_mut_slice()[i];
|
|
let thread = self.threads[x.get_thread()];
|
|
(x, thread)
|
|
}
|
|
pub fn get_thread(&self, i: usize) -> &Thread {
|
|
&self.threads[i]
|
|
}
|
|
}
|
|
|