Initial commit for rewrite

src/config.rs

@@ -0,0 +1,58 @@
+use serde::Deserialize;
+use std::fs;
+use std::path::Path;
+
+#[derive(Debug, Deserialize)]
+pub struct Config {
+    #[serde(default = "default_temp_path")]
+    pub temp_path: String,
+
+    #[serde(default = "default_gpio_line")]
+    pub gpio_line: u32,
+
+    #[serde(default = "default_gpio_chip")]
+    pub gpio_chip: String,
+
+    #[serde(default = "default_log_path")]
+    pub log_path: String,
+
+    #[serde(default = "default_threshold")]
+    pub threshold: f32,
+
+    #[serde(default = "default_variance")]
+    pub variance: f32,
+
+    #[serde(default = "default_interval_ms")]
+    pub interval_ms: u64,
+}
+
+fn default_temp_path() -> String {
+    String::from("/sys/class/thermal/thermal_zone0/temp")
+}
+
+fn default_gpio_line() -> u32 { 17 }
+fn default_gpio_chip() -> String { String::from("/dev/gpiochip0") }
+fn default_log_path() -> String { String::from("/var/log/fan_control.log") }
+fn default_threshold() -> f32 { 55.0 }
+fn default_variance() -> f32 { 5.0 }
+fn default_interval_ms() -> u64 { 1500 }
+
+impl Config {
+    pub fn load(config_path: &str) -> Result<Self, Box<dyn std::error::Error>> {
+        if Path::new(config_path).exists() {
+            let contents = fs::read_to_string(config_path)?;
+            let config: Config = toml::from_str(&contents)?;
+            Ok(config)
+        } else {
+            Ok(Config {
+                temp_path: default_temp_path(),
+                gpio_line: default_gpio_line(),
+                gpio_chip: default_gpio_chip(),
+                log_path: default_log_path(),
+                threshold: default_threshold(),
+                variance: default_variance(),
+                interval_ms: default_interval_ms(),
+            })
+        }
+    }
+}