feat: remove hard rule for sample to have Rain of Chaos card

divi/src/error.rs

@@ -15,7 +15,6 @@ pub enum Error {
     ParseIntError(ParseIntError),
     CsvError(CsvError),
     NinjaError(NinjaError),
-    SampleMustHaveRainOfChaos,
 }
 
 impl Display for Error {
@@ -30,9 +29,6 @@ impl Display for Error {
             Error::ParseIntError(err) => err.fmt(f),
             Error::CsvError(err) => err.fmt(f),
             Error::NinjaError(err) => err.fmt(f),
-            Error::SampleMustHaveRainOfChaos => {
-                f.write_str("Sample must have rain of chaos cards.")
-            }
         }
     }
 }

divi/src/sample.rs

@@ -85,7 +85,7 @@ impl Sample {
             };
         }
 
-        sample.write_weight()?;
+        sample.write_weight();
         Ok(sample)
     }
 
@@ -119,7 +119,7 @@ impl Sample {
             card.set_amount(amount);
         }
 
-        merged.write_weight()?;
+        merged.write_weight();
         Ok(merged)
     }
 
@@ -132,22 +132,16 @@ impl Sample {
     }
 
     /// (After parsing) Calculates special weight for each card and mutates it. Runs at the end of parsing.
-    fn write_weight(&mut self) -> Result<(), Error> {
-        let rain_of_chaos_amount = self
-            .cards
-            .get("Rain of Chaos")
-            .ok_or(Error::SampleMustHaveRainOfChaos)?
-            .amount;
-        if rain_of_chaos_amount == 0 {
-            return Err(Error::SampleMustHaveRainOfChaos);
-        }
+    fn write_weight(&mut self) {
+        let Some(rain_of_chaos_amount) = self.cards.get("Rain of Chaos").map(|card| card.amount)
+        else {
+            return;
+        };
         let weight_multiplier = RAIN_OF_CHAOS_CONDENSED_WEIGHT / rain_of_chaos_amount as f32;
         self.cards.iter_mut().for_each(|card| {
             card.weight =
                 Some((weight_multiplier * card.amount as f32).powf(1.0 / CONDENSING_FACTOR));
         });
-
-        Ok(())
     }
 
     #[must_use]
@@ -487,10 +481,4 @@ Encroaching Darkness,5\r\nThe Endless Darkness,1\r\nThe Endurance,19\r\nThe Enfo
 
         assert_eq!(rain_of_chaos.amount, 1779);
     }
-
-    #[test]
-    fn must_have_rain_of_chaos() {
-        let result = Sample::create(Input::Csv("name,amount\nThe Doctor,1".to_owned()), None);
-        assert!(result.is_err());
-    }
 }