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use super::StorageBackend;
use crate::server::blobref::BlobRef;
use crate::server::storage::{Error, Result};
use log::debug;
use serde::{Deserialize, Serialize};
use std::{fs, io::ErrorKind, path::PathBuf};
pub struct Disk {
bucket: String,
pub root: PathBuf,
}
#[derive(Serialize, Deserialize)]
pub struct Config {
pub root: PathBuf,
}
impl StorageBackend for Disk {
type Config = Config;
fn new(bucket: &str, config: &Self::Config) -> Self {
Self {
bucket: bucket.to_string(),
root: config.root.clone().join(bucket),
}
}
fn put(&self, data: &[u8]) -> Result<BlobRef> {
let blobref = BlobRef::for_bytes(data);
debug!("Preparing {blobref}");
if !self.exists(&blobref) {
let blobpath = self.root.join(blobref.path());
let blobdir = blobpath.parent().expect("blobpath should have a parent");
debug!("Writing blob to {blobpath:?}");
fs::create_dir_all(blobdir).map_err(|_| Error::Io)?;
fs::write(blobpath, data).map_err(|_| Error::Io)?;
}
Ok(blobref)
}
fn get(&self, blobref: &BlobRef) -> Result<Option<Vec<u8>>> {
let blobpath = self.root.join(blobref.path());
match fs::read(blobpath) {
Ok(contents) => Ok(Some(contents)),
Err(e) if e.kind() == ErrorKind::NotFound => Ok(None),
Err(e) => Err(Error::Io),
}
}
fn exists(&self, blobref: &BlobRef) -> bool {
self.root.join(blobref.path()).exists()
}
}
impl Iterator for Disk {
type Item = BlobRef;
fn next(&mut self) -> Option<Self::Item> {
todo!()
}
}
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