258 lines
9.3 KiB
Rust
258 lines
9.3 KiB
Rust
/*
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* meli - imap module.
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*
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* Copyright 2017 - 2019 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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use super::*;
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use crate::backends::BackendOp;
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use crate::email::*;
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use crate::error::{MeliError, Result};
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use std::cell::Cell;
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use std::sync::{Arc, Mutex};
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/// `BackendOp` implementor for Imap
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#[derive(Debug, Clone)]
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pub struct ImapOp {
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uid: usize,
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bytes: Option<String>,
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headers: Option<String>,
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body: Option<String>,
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folder_path: String,
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flags: Cell<Option<Flag>>,
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connection: Arc<Mutex<ImapConnection>>,
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}
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impl ImapOp {
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pub fn new(uid: usize, folder_path: String, connection: Arc<Mutex<ImapConnection>>) -> Self {
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ImapOp {
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uid,
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connection,
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bytes: None,
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headers: None,
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body: None,
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folder_path,
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flags: Cell::new(None),
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}
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}
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}
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impl BackendOp for ImapOp {
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fn description(&self) -> String {
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unimplemented!();
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}
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fn as_bytes(&mut self) -> Result<&[u8]> {
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if self.bytes.is_none() {
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let mut response = String::with_capacity(8 * 1024);
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{
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let mut conn = self.connection.lock().unwrap();
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conn.send_command(format!("SELECT {}", self.folder_path).as_bytes());
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conn.read_response(&mut response);
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conn.send_command(format!("UID FETCH {} (FLAGS RFC822)", self.uid).as_bytes())?;
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conn.read_response(&mut response)?;
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}
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debug!(
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"fetch response is {} bytes and {} lines",
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response.len(),
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response.lines().collect::<Vec<&str>>().len()
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);
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match protocol_parser::uid_fetch_response(response.as_bytes())
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.to_full_result()
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.map_err(MeliError::from)
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{
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Ok(v) => {
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if v.len() != 1 {
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debug!("responses len is {}", v.len());
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/* TODO: Trigger cache invalidation here. */
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return Err(MeliError::new(format!(
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"message with UID {} was not found",
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self.uid
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)));
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}
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let (uid, flags, b) = v[0];
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assert_eq!(uid, self.uid);
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if flags.is_some() {
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self.flags.set(flags);
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}
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self.bytes = Some(unsafe { std::str::from_utf8_unchecked(b).to_string() });
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}
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Err(e) => return Err(e),
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}
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}
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Ok(self.bytes.as_ref().unwrap().as_bytes())
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}
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fn fetch_headers(&mut self) -> Result<&[u8]> {
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if self.bytes.is_some() {
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let result =
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parser::headers_raw(self.bytes.as_ref().unwrap().as_bytes()).to_full_result()?;
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return Ok(result);
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}
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if self.headers.is_none() {
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let mut response = String::with_capacity(8 * 1024);
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let mut conn = self.connection.lock().unwrap();
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conn.send_command(format!("UID FETCH {} (FLAGS RFC822.HEADER)", self.uid).as_bytes())?;
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conn.read_response(&mut response)?;
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debug!(
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"fetch response is {} bytes and {} lines",
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response.len(),
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response.lines().collect::<Vec<&str>>().len()
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);
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match protocol_parser::uid_fetch_response(response.as_bytes())
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.to_full_result()
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.map_err(MeliError::from)
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{
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Ok(v) => {
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if v.len() != 1 {
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debug!("responses len is {}", v.len());
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/* TODO: Trigger cache invalidation here. */
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return Err(MeliError::new(format!(
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"message with UID {} was not found",
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self.uid
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)));
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}
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let (uid, flags, b) = v[0];
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assert_eq!(uid, self.uid);
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if flags.is_some() {
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self.flags.set(flags);
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}
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self.body = Some(unsafe { std::str::from_utf8_unchecked(b).to_string() });
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}
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Err(e) => return Err(e),
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}
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}
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Ok(self.body.as_ref().unwrap().as_bytes())
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}
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fn fetch_body(&mut self) -> Result<&[u8]> {
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if self.bytes.is_some() {
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let result =
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parser::body_raw(self.bytes.as_ref().unwrap().as_bytes()).to_full_result()?;
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return Ok(result);
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}
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if self.body.is_none() {
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let mut response = String::with_capacity(8 * 1024);
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let mut conn = self.connection.lock().unwrap();
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conn.send_command(format!("UID FETCH {} (FLAGS RFC822.TEXT)", self.uid).as_bytes())?;
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conn.read_response(&mut response)?;
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debug!(
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"fetch response is {} bytes and {} lines",
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response.len(),
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response.lines().collect::<Vec<&str>>().len()
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);
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match protocol_parser::uid_fetch_response(response.as_bytes())
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.to_full_result()
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.map_err(MeliError::from)
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{
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Ok(v) => {
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if v.len() != 1 {
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debug!("responses len is {}", v.len());
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/* TODO: Trigger cache invalidation here. */
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return Err(MeliError::new(format!(
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"message with UID {} was not found",
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self.uid
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)));
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}
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let (uid, flags, b) = v[0];
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assert_eq!(uid, self.uid);
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if flags.is_some() {
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self.flags.set(flags);
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}
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self.body = Some(unsafe { std::str::from_utf8_unchecked(b).to_string() });
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}
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Err(e) => return Err(e),
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}
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}
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Ok(self.body.as_ref().unwrap().as_bytes())
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}
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fn fetch_flags(&self) -> Flag {
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if self.flags.get().is_some() {
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return self.flags.get().unwrap();
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}
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let mut response = String::with_capacity(8 * 1024);
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let mut conn = self.connection.lock().unwrap();
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conn.send_command(format!("UID FETCH {} FLAGS", self.uid).as_bytes())
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.unwrap();
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conn.read_response(&mut response).unwrap();
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debug!(
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"fetch response is {} bytes and {} lines",
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response.len(),
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response.lines().collect::<Vec<&str>>().len()
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);
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match protocol_parser::uid_fetch_response(response.as_bytes())
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.to_full_result()
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.map_err(MeliError::from)
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{
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Ok(v) => {
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if v.len() != 1 {
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debug!("responses len is {}", v.len());
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/* TODO: Trigger cache invalidation here. */
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panic!(format!("message with UID {} was not found", self.uid));
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}
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let (uid, flags, _) = v[0];
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assert_eq!(uid, self.uid);
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if flags.is_some() {
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self.flags.set(flags);
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}
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}
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Err(e) => Err(e).unwrap(),
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}
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self.flags.get().unwrap()
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}
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fn set_flag(&mut self, _envelope: &mut Envelope, flag: Flag) -> Result<()> {
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let mut response = String::with_capacity(8 * 1024);
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let mut conn = self.connection.lock().unwrap();
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conn.send_command(format!("SELECT \"{}\"", &self.folder_path,).as_bytes())?;
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conn.read_response(&mut response)?;
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debug!(&response);
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conn.send_command(
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format!(
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"UID STORE {} FLAGS.SILENT ({})",
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self.uid,
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flags_to_imap_list!(flag)
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)
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.as_bytes(),
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)?;
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conn.read_response(&mut response)?;
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debug!(&response);
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match protocol_parser::uid_fetch_response(response.as_bytes())
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.to_full_result()
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.map_err(MeliError::from)
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{
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Ok(v) => {
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if v.len() == 1 {
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debug!("responses len is {}", v.len());
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let (uid, flags, _) = v[0];
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assert_eq!(uid, self.uid);
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if flags.is_some() {
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self.flags.set(flags);
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}
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}
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}
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Err(e) => Err(e).unwrap(),
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}
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conn.send_command(format!("EXAMINE \"{}\"", &self.folder_path,).as_bytes())?;
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conn.read_response(&mut response)?;
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Ok(())
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}
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}
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