4 changed files with 342 additions and 21 deletions
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173Cargo.lock
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4Cargo.toml
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70src/config.rs
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116src/main.rs
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use std::error::Error;
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use std::ffi::OsString;
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use std::fs::File;
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use std::io::{BufReader, BufWriter};
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use std::path::Path;
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use std::process::exit;
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use serde::ser::Error as SerdeError;
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use serde::{Deserialize, Serialize};
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use serde_json::{from_reader, to_writer_pretty};
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#[derive(Serialize, Deserialize, Debug)]
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#[serde(deny_unknown_fields)]
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pub struct Config {
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pub save_directory: Option<String>,
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pub downloaded: Vec<String>,
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}
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pub struct ConfigManager {
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config_path: OsString,
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pub config: Config,
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}
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fn read_config<P: AsRef<Path>>(path: P) -> Result<Config, Box<dyn Error>> {
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let file = File::open(path)?;
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let reader = BufReader::new(file);
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let result: Config = from_reader(reader)?;
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Ok(result)
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}
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fn save_config<P: AsRef<Path>>(path: P, config: &Config) -> serde_json::Result<()> {
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match File::create(path) {
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Err(e) => Err(serde_json::Error::custom(e)),
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Ok(file) => to_writer_pretty(file, config),
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}
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}
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impl ConfigManager {
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pub fn new(config_path: &Path) -> ConfigManager {
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let mut config = ConfigManager {
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config_path: OsString::from(config_path.as_os_str()),
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config: Config {
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save_directory: None,
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downloaded: vec![],
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},
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};
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config.load();
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config
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}
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fn load(&mut self) {
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match read_config(&self.config_path) {
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Err(e) => {
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println!("Failed to read config file {:#?}", &self.config_path);
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exit(1);
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}
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Ok(config) => self.config = config,
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}
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}
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pub fn save(&mut self, config: Config) {
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match save_config(&self.config_path, &config) {
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Err(e) => {
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println!("Unexpected error saving config: {}", e);
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}
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Ok(_) => (),
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}
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self.config = config;
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}
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}
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