config: streamline treshold validation

src/battery.rs

@@ -1,4 +1,4 @@
-use crate::util::error::ControlError;
+use crate::{config::types::BatteryChargeThresholds, util::error::ControlError};
 use log::{debug, warn};
 use std::{
     fs, io,
@@ -71,7 +71,9 @@ pub struct SupportedBattery {
 /// - No batteries with threshold support are found
 /// - Failed to set thresholds on any battery
 pub fn set_battery_charge_thresholds(start_threshold: u8, stop_threshold: u8) -> Result<()> {
-    validate_thresholds(start_threshold, stop_threshold)?;
+    // Validate thresholds using `BatteryChargeThresholds`
+    let thresholds = BatteryChargeThresholds::new(start_threshold, stop_threshold)
+        .map_err(|e| ControlError::InvalidValueError(e))?;
 
     let power_supply_path = Path::new("/sys/class/power_supply");
     if !power_supply_path.exists() {
@@ -87,29 +89,7 @@ pub fn set_battery_charge_thresholds(start_threshold: u8, stop_threshold: u8) ->
         ));
     }
 
-    apply_thresholds_to_batteries(&supported_batteries, start_threshold, stop_threshold)
+    apply_thresholds_to_batteries(&supported_batteries, thresholds.start, thresholds.stop)
-}
-
-/// Validates that the threshold values are in acceptable ranges
-fn validate_thresholds(start_threshold: u8, stop_threshold: u8) -> Result<()> {
-    if start_threshold == 0 || stop_threshold == 0 {
-        return Err(ControlError::InvalidValueError(
-            "Thresholds must be greater than 0%".to_string(),
-        ));
-    }
-    if start_threshold >= stop_threshold {
-        return Err(ControlError::InvalidValueError(format!(
-            "Start threshold ({start_threshold}) must be less than stop threshold ({stop_threshold})"
-        )));
-    }
-
-    if stop_threshold > 100 {
-        return Err(ControlError::InvalidValueError(format!(
-            "Stop threshold ({stop_threshold}) cannot exceed 100%"
-        )));
-    }
-
-    Ok(())
 }
 
 /// Finds all batteries in the system that support threshold control

src/config/mod.rs

@@ -1,9 +1,6 @@
+pub mod load;
+pub mod types;
 pub mod watcher;
 
-// Re-export all configuration types and functions
+pub use load::*;
-pub use self::load::*;
+pub use types::*;
-pub use self::types::*;
-
-// Internal organization of config submodules
-mod load;
-mod types;

src/config/types.rs

@@ -1,6 +1,7 @@
 // Configuration types and structures for superfreq
 use crate::core::TurboSetting;
 use serde::{Deserialize, Serialize};
+use std::convert::TryFrom;
 
 #[derive(Deserialize, Serialize, Debug, Clone)]
 pub struct BatteryChargeThresholds {
@@ -8,6 +9,33 @@ pub struct BatteryChargeThresholds {
     pub stop: u8,
 }
 
+impl BatteryChargeThresholds {
+    pub fn new(start: u8, stop: u8) -> Result<Self, String> {
+        if start == 0 || stop == 0 {
+            return Err("Thresholds must be greater than 0%".to_string());
+        }
+        if start >= stop {
+            return Err(format!(
+                "Start threshold ({start}) must be less than stop threshold ({stop})"
+            ));
+        }
+        if stop > 100 {
+            return Err(format!("Stop threshold ({stop}) cannot exceed 100%"));
+        }
+
+        Ok(Self { start, stop })
+    }
+}
+
+impl TryFrom<(u8, u8)> for BatteryChargeThresholds {
+    type Error = String;
+
+    fn try_from(values: (u8, u8)) -> Result<Self, Self::Error> {
+        let (start, stop) = values;
+        Self::new(start, stop)
+    }
+}
+
 // Structs for configuration using serde::Deserialize
 #[derive(Deserialize, Debug, Clone)]
 pub struct ProfileConfig {