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use serde::{Deserialize, Serialize};
use serde_json::{from_str, to_string};
use std::env;
use std::fs::{File, create_dir_all, write};
use std::io::{Read, Result};
use std::path::PathBuf;
const CONFIG_ENV_VARIABLE: &str = "LYRICLI_CONFIG_DIRECTORY";
const CONFIG_DEFAULT_LOCATION: &str = "XDG_CONFIG_HOME";
const CONFIG_FALLBACK_LOCATION: &str = ".config";
const CONFIG_SUBDIRECTORY: &str = "lyricli";
const CONFIG_FILENAME: &str = "lyricli.conf";
#[derive(Serialize, Deserialize, Debug)]
pub struct Configuration {
enabled_sources: Vec<String>,
}
impl Configuration {
pub fn new() -> Self {
if let Some(configuration) = Configuration::read() {
return configuration;
}
let configuration = Configuration::default();
// Write the defaults.
Configuration::write(&configuration).ok();
configuration
}
// Public API
pub fn is_enabled(&self, source_name: &String) -> bool {
self.enabled_sources.contains(source_name)
}
pub fn enable_source(&mut self, source_name: &String) -> Result<()> {
if !self.enabled_sources.contains(source_name) {
self.enabled_sources.push(source_name.to_owned())
}
Configuration::write(self)
}
pub fn disable_source(&mut self, source_name: &String) -> Result<()> {
self.enabled_sources.retain(|source| source != source_name);
Configuration::write(self)
}
// Helpers
fn default() -> Configuration {
Configuration {
enabled_sources: vec![
"apple_music".to_string(),
"spotify".to_string(),
"swinsian".to_string(),
"mpris".to_string(),
],
}
}
fn read() -> Option<Configuration> {
let config_file_path = Configuration::file_path();
let mut config_file = File::open(&config_file_path).ok()?;
let mut config_contents = String::new();
config_file.read_to_string(&mut config_contents).ok()?;
from_str(&config_contents).ok()?
}
fn write(configuration: &Configuration) -> Result<()> {
let config_file_path = Configuration::file_path();
if let Ok(serialized_configuration) = to_string(&configuration) {
write(&config_file_path, serialized_configuration)?;
}
Ok(())
}
fn file_path() -> PathBuf {
let config_directory = Configuration::directory();
create_dir_all(&config_directory).ok();
config_directory.join(CONFIG_FILENAME)
}
fn directory() -> PathBuf {
match env::var(CONFIG_ENV_VARIABLE) {
Ok(directory) => PathBuf::from(directory),
Err(_) => match env::var(CONFIG_DEFAULT_LOCATION) {
Ok(directory) => PathBuf::from(directory),
Err(_) => match env::var("HOME") {
Ok(directory) => PathBuf::from(directory).join(CONFIG_FALLBACK_LOCATION),
Err(_) => panic!(
"Could not find required directory, {CONFIG_ENV_VARIABLE} or {CONFIG_DEFAULT_LOCATION} should be set and readable."
),
},
},
}
.join(CONFIG_SUBDIRECTORY)
}
}
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