47 lines
1.2 KiB
Rust
47 lines
1.2 KiB
Rust
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use std::{fs, path::PathBuf};
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use anyhow::{bail, Result};
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use directories::ProjectDirs;
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use serde::{Deserialize, Serialize};
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#[derive(Clone)]
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pub struct Persistence {
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dirs: Option<Dirs>,
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}
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impl Persistence {
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pub fn new() -> Self {
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Self { dirs: init_dirs() }
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}
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pub fn save_config<T: Serialize>(&self, file: &str, data: &T) -> Result<()> {
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if let Some(dirs) = self.dirs.as_ref() {
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let bytes = serde_json::to_vec_pretty(data)?;
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let filename = dirs.config_dir.join(file).with_extension("json");
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fs::write(&filename, bytes)?;
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}
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Ok(())
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}
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pub fn load_config<T: for<'a> Deserialize<'a>>(&self, file: &str) -> Result<T> {
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let Some(dirs) = self.dirs.as_ref() else {
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bail!("config directory not found");
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};
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let filename = dirs.config_dir.join(file).with_extension("json");
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let bytes = fs::read(filename)?;
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Ok(serde_json::from_slice(&bytes)?)
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}
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}
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#[derive(Clone)]
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struct Dirs {
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config_dir: PathBuf,
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}
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fn init_dirs() -> Option<Dirs> {
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let dirs = ProjectDirs::from("com", "virtual-boy", "Lemur")?;
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let config_dir = dirs.config_dir().to_path_buf();
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fs::create_dir_all(&config_dir).ok()?;
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Some(Dirs { config_dir })
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}
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