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use std::{
env::var,
fs::{File, remove_file},
io::Read,
time::{Duration, UNIX_EPOCH},
};
use anyhow::Result;
use clokwerk::{AsyncScheduler, Interval};
use log::{debug, error, info};
use rpgpie::{
certificate::Certificate,
message::{SignatureMode, encrypt},
policy::Seipd,
};
use tar::Builder;
use teloxide::{Bot, prelude::Requester, types::InputFile};
use tokio::time::sleep;
const MAX_FILE_SIZE: usize = 50000000;
const BACKUP: &str = "backup";
const BACKUP_ENCRYPTED: &str = "backup_encrypted";
#[tokio::main]
async fn main() -> Result<()> {
env_logger::init();
let mut scheduler = AsyncScheduler::new();
let interval = var("INTERVAL")?.parse::<u32>()?;
scheduler.every(Interval::Hours(interval)).run(|| async {
backup().await.unwrap();
});
info!("Program set to backup every {} hours", interval);
info!("Running first backup out of schedule");
backup().await?;
loop {
scheduler.run_pending().await;
sleep(Duration::from_secs(30)).await;
}
}
async fn backup() -> Result<()> {
info!("Running a backup");
let chat_id = var("CHAT_ID").unwrap();
let locations: Vec<String> = var("LOCATIONS")
.unwrap()
.trim()
.split(':')
.map(|s| s.to_string())
.collect();
archive(&locations)?;
encrypt_data("pub.txt")?;
remove_file(BACKUP)?;
let bot = Bot::from_env();
let mut data_to_send = File::open(BACKUP_ENCRYPTED)?;
bot.send_message(
chat_id.clone(),
format!("{}", UNIX_EPOCH.elapsed()?.as_secs().to_string()),
)
.await?;
let mut rr;
let mut part = 0;
loop {
let mut buf = vec![0; MAX_FILE_SIZE];
rr = data_to_send.read(&mut buf)?;
debug!("Read {} bytes", rr);
let data = InputFile::memory(buf).file_name(format!("part_{:06}", part));
if rr == 0 {
break;
}
loop {
match bot.send_document(chat_id.clone(), data.clone()).await {
Ok(_) => break,
Err(teloxide::RequestError::RetryAfter(n)) => {
error!("Awaiting {} seconds", n.seconds());
sleep(Duration::from_secs(n.seconds() as u64)).await
}
Err(err) => {
error!("{}\nAwaiting 8 seconds", err);
sleep(Duration::from_secs(8)).await
}
}
}
info!("Sent part {}", part);
part += 1;
}
drop(data_to_send);
remove_file(BACKUP_ENCRYPTED)?;
info!("Backup terminated");
Ok(())
}
fn archive(location: &[String]) -> Result<()> {
info!("Creating archive");
let mut b = Builder::new(File::create(BACKUP)?);
for loc in location {
b.append_dir_all(loc, loc)?;
}
b.finish()?;
info!("Archive created");
Ok(())
}
fn encrypt_data(key_file: &str) -> Result<()> {
info!("Encrypting archive");
let rec = Certificate::load(&mut File::open(key_file)?)?;
let mut plaintext = File::open(BACKUP)?;
let mut output = File::create(BACKUP_ENCRYPTED)?;
encrypt(
Some(Seipd::SEIPD2),
rec,
Vec::new(),
Vec::new(),
&Vec::new(),
&mut plaintext,
SignatureMode::Binary,
&mut output,
false,
)?;
info!("Archive encrypted");
Ok(())
}
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