devrc/
cache.rs

1use std::{
2    fs::{self, File},
3    io::Write,
4    path::{Path, PathBuf},
5    time::{Duration, SystemTime, UNIX_EPOCH},
6};
7
8use sha256::digest;
9use url::Url;
10
11use crate::{errors::DevrcResult, loader::LoadingConfig};
12
13const DEVRC_CACHE_DIR_NAME: &str = "devrc";
14
15/// Get absolute path to devrc cache dir
16pub fn get_cache_path() -> Option<PathBuf> {
17    dirs_next::cache_dir().map(|path| Path::new(&path).join(DEVRC_CACHE_DIR_NAME))
18}
19
20pub fn get_file_cache_meta(url: &Url) -> Option<PathBuf> {
21    let hash = digest(url.as_str());
22    get_cache_path().map(|path| path.join(format!("{:}.cache", hash)))
23}
24
25#[derive(Debug, Default)]
26pub struct Cache {}
27
28pub fn save(url: &Url, content: &str) -> DevrcResult<()> {
29    if let Some(file) = get_file_cache_meta(url) {
30        if let Some(dir) = file.parent() {
31            if !dir.exists() {
32                fs::create_dir_all(dir)?;
33            }
34        }
35
36        let mut f = File::create(file)?;
37        f.write_all(content.as_bytes())?;
38    }
39    Ok(())
40}
41
42pub fn load(
43    url: &Url,
44    _loading_config: &LoadingConfig,
45    _checksum: Option<&str>,
46    ttl: &Duration,
47) -> Option<String> {
48    if let Some(file) = get_file_cache_meta(url) {
49        if !file.exists() {
50            return None;
51        }
52
53        if let Ok(modified) = fs::metadata(&file).ok()?.modified() {
54            let now_timestamp = SystemTime::now().duration_since(UNIX_EPOCH).ok()?;
55            let created_timestamp = modified.duration_since(UNIX_EPOCH).ok()?;
56
57            let duration = now_timestamp - created_timestamp;
58
59            if duration < *ttl {
60                return fs::read_to_string(file).ok();
61            }
62        }
63    }
64    None
65}
devrc/cache.rs

devrc/
cache.rs
