mirror of
https://codeberg.org/Fl1tzi/microdeck.git
synced 2024-05-05 13:12:47 +00:00
131 lines
3.8 KiB
Rust
131 lines
3.8 KiB
Rust
use serde::Deserialize;
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use dirs::config_dir;
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use std::{
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env,
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fmt::{self, Display},
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fs,
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io::ErrorKind,
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path::PathBuf,
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collections::HashMap,
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sync::Arc
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};
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use tracing::debug;
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use serde_json;
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/// The name of the folder which holds the config
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pub const CONFIG_FOLDER_NAME: &'static str = "microdeck";
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pub const CONFIG_FILE: &'static str = "config.json";
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#[derive(Deserialize, Debug)]
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pub struct Config {
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pub global: Option<GlobalConfig>,
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pub devices: Vec<DeviceConfig>,
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}
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#[derive(Deserialize, Debug)]
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pub struct GlobalConfig;
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#[derive(Deserialize, Debug, Clone)]
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pub struct DeviceConfig {
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pub serial: String,
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#[serde(default = "default_brightness")]
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pub brightness: u8,
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pub buttons: Vec<Arc<Button>>,
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}
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fn default_brightness() -> u8 {
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100
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}
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#[derive(Deserialize, Debug, Clone)]
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pub struct Button {
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pub index: u8,
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pub module: String,
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/// options which get passed to the module
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pub options: Option<HashMap<String, String>>,
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/// allows to overwrite what it will do on a click (executes in /bin/sh)
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pub on_click: Option<String>,
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/// allows to overwrite what it will do on a release
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pub on_release: Option<String>,
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}
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#[tracing::instrument]
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pub fn load_config() -> Result<Config, ConfigError> {
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let config_file: PathBuf = match env::var_os("DACH_DECKER_CONFIG") {
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Some(path) => {
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debug!("Using env variable: {:?}", path);
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PathBuf::from(path)
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}
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None => {
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// try to get the system config dir; env var required if not available
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if let Some(mut path) = config_dir() {
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path.push(CONFIG_FOLDER_NAME);
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path.push(CONFIG_FILE);
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debug!("Using system path: {:?}", path);
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path
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} else {
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return Err(ConfigError::PathNotAvailable());
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}
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}
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};
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let path = config_file.display().to_string().clone();
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match fs::read_to_string(config_file) {
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Ok(content) => {
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serde_json::from_str(&content).map_err(|e| ConfigError::SyntaxError(e.to_string()))
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}
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Err(file_error) => {
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if file_error.kind() == ErrorKind::NotFound {
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return Err(ConfigError::FilePathDoesNotExist(path));
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} else {
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return Err(ConfigError::ReadError(file_error.to_string()));
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}
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}
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}
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}
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#[derive(Debug)]
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pub enum ConfigError {
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ButtonDoesNotExist(u8),
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ModuleDoesNotExist(u8, String),
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PathNotAvailable(),
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SyntaxError(String),
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FilePathDoesNotExist(String),
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ReadError(String),
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}
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impl Display for ConfigError {
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fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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match self {
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ConfigError::ButtonDoesNotExist(index) => {
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write!(formatter, "Button {}: does not exist.", index)
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}
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ConfigError::ModuleDoesNotExist(index, module) => write!(
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formatter,
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"Button {}: The module \"{}\" does not exist.",
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index, module
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),
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ConfigError::PathNotAvailable() => write!(
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formatter,
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"Config directory not available. Please use the environment variable \"DACH_DECKER_CONFIG\" to specify the location of the config."
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),
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ConfigError::SyntaxError(text) => write!(
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formatter,
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"Syntax error in configuration:\n{}",
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text
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),
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ConfigError::FilePathDoesNotExist(path) => write!(
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formatter,
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"The configuration file does not exist in {}",
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path
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),
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ConfigError::ReadError(error) => write!(
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formatter,
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"Could not read the configuration file: {}",
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error
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)
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}
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}
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}
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