mirror of https://github.com/dswd/zvault
104 lines
2.6 KiB
Rust
104 lines
2.6 KiB
Rust
use std::collections::HashMap;
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use std::path::Path;
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use std::io::{self, BufReader, Read, Write, BufWriter};
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use std::fs::File;
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use ::bundle::{Bundle, BundleId, BundleInfo};
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use ::util::*;
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static HEADER_STRING: [u8; 7] = *b"zbunmap";
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static HEADER_VERSION: u8 = 1;
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quick_error!{
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#[derive(Debug)]
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pub enum BundleMapError {
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Io(err: io::Error) {
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from()
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cause(err)
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description("Failed to read/write bundle map")
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}
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Decode(err: msgpack::DecodeError) {
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from()
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cause(err)
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description("Failed to decode bundle map")
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}
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Encode(err: msgpack::EncodeError) {
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from()
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cause(err)
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description("Failed to encode bundle map")
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}
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WrongHeader {
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description("Wrong header")
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}
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WrongVersion(version: u8) {
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description("Wrong version")
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display("Wrong version: {}", version)
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}
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}
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}
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#[derive(Default)]
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pub struct BundleData {
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pub info: BundleInfo
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}
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serde_impl!(BundleData(u64) {
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info: BundleInfo => 0
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});
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impl BundleData {
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#[inline]
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pub fn id(&self) -> BundleId {
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self.info.id.clone()
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}
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}
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pub struct BundleMap(HashMap<u32, BundleData>);
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impl BundleMap {
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pub fn create() -> Self {
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BundleMap(Default::default())
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}
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pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, BundleMapError> {
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let mut file = BufReader::new(try!(File::open(path.as_ref())));
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let mut header = [0u8; 8];
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try!(file.read_exact(&mut header));
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if header[..HEADER_STRING.len()] != HEADER_STRING {
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return Err(BundleMapError::WrongHeader)
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}
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let version = header[HEADER_STRING.len()];
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if version != HEADER_VERSION {
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return Err(BundleMapError::WrongVersion(version))
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}
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Ok(BundleMap(try!(msgpack::decode_from_stream(&mut file))))
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}
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pub fn save<P: AsRef<Path>>(&self, path: P) -> Result<(), BundleMapError> {
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let mut file = BufWriter::new(try!(File::create(path)));
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try!(file.write_all(&HEADER_STRING));
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try!(file.write_all(&[HEADER_VERSION]));
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msgpack::encode_to_stream(&self.0, &mut file).map_err(BundleMapError::Encode)
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}
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#[inline]
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pub fn get(&self, id: u32) -> Option<&BundleData> {
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self.0.get(&id)
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}
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#[inline]
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pub fn set(&mut self, id: u32, bundle: &Bundle) {
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let data = BundleData { info: bundle.info.clone() };
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self.0.insert(id, data);
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}
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#[inline]
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pub fn bundles(&self) -> Vec<&BundleData> {
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self.0.values().collect()
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}
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}
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