Add option to manually swap shifts after the schedule has been generated

src-tauri/src/slot.rs

@@ -192,6 +192,27 @@ pub enum ShiftPosition {
     Second,
 }
 
+impl ShiftPosition {
+    pub fn as_str(self) -> &'static str {
+        match self {
+            ShiftPosition::First => "First",
+            ShiftPosition::Second => "Second",
+        }
+    }
+}
+
+impl TryFrom<&str> for ShiftPosition {
+    type Error = ();
+
+    fn try_from(s: &str) -> Result<Self, Self::Error> {
+        match s {
+            "First" => Ok(ShiftPosition::First),
+            "Second" => Ok(ShiftPosition::Second),
+            _ => Err(()),
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use rstest::rstest;