refactor: rewrite in rust

src/models/timecard.rs

@@ -0,0 +1,77 @@
+use chrono::NaiveDate;
+use chrono::NaiveTime;
+use serde::{Deserialize, Serialize};
+
+/// Type of special day that affects timesheet calculations.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+pub enum SpecialDayType {
+    #[serde(rename = "VACATION")]
+    Vacation,
+    #[serde(rename = "UNDERTIME")]
+    Undertime,
+    #[serde(rename = "HOLIDAY")]
+    Holiday,
+    #[serde(rename = "WEEKEND")]
+    Weekend,
+}
+
+impl std::fmt::Display for SpecialDayType {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            SpecialDayType::Vacation => write!(f, "VACATION"),
+            SpecialDayType::Undertime => write!(f, "UNDERTIME"),
+            SpecialDayType::Holiday => write!(f, "HOLIDAY"),
+            SpecialDayType::Weekend => write!(f, "WEEKEND"),
+        }
+    }
+}
+
+/// A Timecard represents a single work period with start and end times.
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct Timecard {
+    pub from_time: NaiveTime,
+    pub to_time: NaiveTime,
+}
+
+impl Timecard {
+    pub fn new(from_time: NaiveTime, to_time: NaiveTime) -> Self {
+        Self { from_time, to_time }
+    }
+}
+
+/// A Timesheet aggregates all time tracking information for a single day.
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct Timesheet {
+    pub date: NaiveDate,
+    #[serde(default)]
+    pub is_sick_leave: bool,
+    #[serde(default)]
+    pub special_day_type: Option<SpecialDayType>,
+    pub timecards: Vec<Timecard>,
+}
+
+impl Timesheet {
+    pub fn new(date: NaiveDate) -> Self {
+        Self {
+            date,
+            is_sick_leave: false,
+            special_day_type: None,
+            timecards: Vec::new(),
+        }
+    }
+
+    pub fn with_sick_leave(mut self, is_sick_leave: bool) -> Self {
+        self.is_sick_leave = is_sick_leave;
+        self
+    }
+
+    pub fn with_special_day_type(mut self, special_day_type: SpecialDayType) -> Self {
+        self.special_day_type = Some(special_day_type);
+        self
+    }
+
+    pub fn with_timecards(mut self, timecards: Vec<Timecard>) -> Self {
+        self.timecards = timecards;
+        self
+    }
+}