Improve error handling, logging

src-tauri/src/config.rs

@@ -1,3 +1,4 @@
+use anyhow::Context;
 use chrono::Month;
 use serde::{Deserialize, Serialize};
 
@@ -6,6 +7,7 @@ use crate::{
     slot::Day,
 };
 
+const MONTH: u8 = 2;
 const YEAR: i32 = 2026;
 
 #[derive(Debug, Clone)]
@@ -53,30 +55,6 @@ pub struct UserConfig {
 }
 
 impl UserConfig {
-    pub fn new(month: u8) -> Self {
-        let month = Month::try_from(month).unwrap();
-        let total_days = month.num_days(YEAR).unwrap();
-        let total_slots = (1..=total_days)
-            .map(|d| if Day(d).is_open_shift() { 2 } else { 1 })
-            .sum();
-
-        let total_holiday_slots = (1..=total_days)
-            .filter(|&d| Day(d).is_weekend(month.number_from_month(), YEAR))
-            .map(|d| if Day(d).is_open_shift() { 2 } else { 1 })
-            .sum();
-
-        Self {
-            month,
-            year: YEAR,
-            holidays: vec![],
-            residents: vec![],
-            toxic_pairs: vec![],
-            total_days,
-            total_slots,
-            total_holiday_slots,
-        }
-    }
-
     pub fn with_holidays(mut self, holidays: Vec<u8>) -> Self {
         self.holidays = holidays;
         self.total_holiday_slots = self.total_holiday_slots();
@@ -113,7 +91,7 @@ impl UserConfig {
 
 impl Default for UserConfig {
     fn default() -> Self {
-        let month = Month::try_from(2).unwrap();
+        let month = Month::try_from(MONTH).unwrap();
 
         let total_days = month.num_days(YEAR).unwrap();
 
@@ -139,11 +117,13 @@ impl Default for UserConfig {
     }
 }
 
-impl From<UserConfigDTO> for UserConfig {
-    fn from(value: UserConfigDTO) -> Self {
-        let month = Month::try_from(value.month).unwrap();
+impl TryFrom<UserConfigDTO> for UserConfig {
+    type Error = anyhow::Error;
 
-        let total_days = month.num_days(YEAR).unwrap();
+    fn try_from(value: UserConfigDTO) -> Result<Self, Self::Error> {
+        let month = Month::try_from(value.month)?;
+
+        let total_days = month.num_days(value.year).context("Failed to parse")?;
 
         let total_slots = (1..=total_days)
             .map(|d| if Day(d).is_open_shift() { 2 } else { 1 })
@@ -157,7 +137,7 @@ impl From<UserConfigDTO> for UserConfig {
             .map(|d| if Day(d).is_open_shift() { 2 } else { 1 })
             .sum();
 
-        Self {
+        Ok(Self {
             month,
             year: value.year,
             holidays: value.holidays,
@@ -170,6 +150,6 @@ impl From<UserConfigDTO> for UserConfig {
             total_days,
             total_slots,
             total_holiday_slots,
-        }
+        })
     }
 }