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use crate::chunk::DataChunk;
use crate::chunkid::ChunkId;
use crate::chunkmeta::ChunkMeta;
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::default::Default;
use std::path::{Path, PathBuf};
#[derive(Debug, Deserialize, Clone)]
pub struct Config {
pub chunks: PathBuf,
pub address: String,
pub tls_key: PathBuf,
pub tls_cert: PathBuf,
}
#[derive(Debug, thiserror::Error)]
pub enum ConfigError {
#[error("Directory for chunks {0} does not exist")]
ChunksDirNotFound(PathBuf),
#[error("TLS certificate {0} does not exist")]
TlsCertNotFound(PathBuf),
#[error("TLS key {0} does not exist")]
TlsKeyNotFound(PathBuf),
#[error("server address can't be resolved")]
BadServerAddress,
}
impl Config {
pub fn read_config(filename: &Path) -> anyhow::Result<Config> {
let config = std::fs::read_to_string(filename)?;
let config: Config = serde_yaml::from_str(&config)?;
config.check()?;
Ok(config)
}
pub fn check(&self) -> anyhow::Result<()> {
if !self.chunks.exists() {
return Err(ConfigError::ChunksDirNotFound(self.chunks.clone()).into());
}
if !self.tls_cert.exists() {
return Err(ConfigError::TlsCertNotFound(self.tls_cert.clone()).into());
}
if !self.tls_key.exists() {
return Err(ConfigError::TlsKeyNotFound(self.tls_key.clone()).into());
}
Ok(())
}
}
/// Result of creating a chunk.
#[derive(Debug, Serialize)]
pub struct Created {
id: ChunkId,
}
impl Created {
pub fn new(id: ChunkId) -> Self {
Created { id }
}
pub fn to_json(&self) -> String {
serde_json::to_string(&self).unwrap()
}
}
/// Result of retrieving a chunk.
#[derive(Debug, Serialize)]
pub struct Fetched {
id: ChunkId,
chunk: DataChunk,
}
impl Fetched {
pub fn new(id: ChunkId, chunk: DataChunk) -> Self {
Fetched { id, chunk }
}
pub fn to_json(&self) -> String {
serde_json::to_string(&self).unwrap()
}
}
/// Result of a search.
#[derive(Debug, Default, PartialEq, Deserialize, Serialize)]
pub struct SearchHits {
map: HashMap<String, ChunkMeta>,
}
impl SearchHits {
pub fn insert(&mut self, id: ChunkId, meta: ChunkMeta) {
self.map.insert(id.to_string(), meta);
}
pub fn from_json(s: &str) -> Result<Self, serde_json::Error> {
let map = serde_json::from_str(s)?;
Ok(SearchHits { map })
}
pub fn to_json(&self) -> String {
serde_json::to_string(&self.map).unwrap()
}
}
#[cfg(test)]
mod test_search_hits {
use super::{ChunkMeta, SearchHits};
#[test]
fn no_search_hits() {
let hits = SearchHits::default();
assert_eq!(hits.to_json(), "{}");
}
#[test]
fn one_search_hit() {
let id = "abc".parse().unwrap();
let meta = ChunkMeta::new("123");
let mut hits = SearchHits::default();
hits.insert(id, meta);
eprintln!("hits: {:?}", hits);
let json = hits.to_json();
let hits2 = SearchHits::from_json(&json).unwrap();
assert_eq!(hits, hits2);
}
}
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