From 413608ea229f0adec21feb27501178ccadd47844 Mon Sep 17 00:00:00 2001
From: Sam Anthony <sam@samanthony.xyz>
Date: Fri, 20 Jan 2023 19:55:20 -0330
Subject: add cc unit

---
 src/main.rs   |  2 +-
 src/volume.rs | 84 +++++++++++++++++++++++++++++++++++++++++++++--------------
 2 files changed, 66 insertions(+), 20 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index cc06d95..8a0e170 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -77,7 +77,7 @@ impl Sandbox for App {
     fn view(&self) -> Element<Self::Message> {
         column![row![
             text("Displacement:"),
-            text_input("2.0", &self.ui.displacement, Message::Displacement),
+            text_input("0.0", &self.ui.displacement, Message::Displacement),
             pick_list(
                 &volume::Unit::ALL[..],
                 Some(self.ui.displacement_unit),
diff --git a/src/volume.rs b/src/volume.rs
index 5818ea4..a288f7e 100644
--- a/src/volume.rs
+++ b/src/volume.rs
@@ -1,17 +1,15 @@
-use std::{
-    fmt::{self, Display, Formatter},
-    ops::Mul,
-};
+use std::fmt::{self, Display, Formatter};
 
 #[derive(Copy, Clone, Debug, Default, Eq, PartialEq)]
 pub enum Unit {
     #[default]
     CubicMetre,
     Litre,
+    CubicCentimetre,
 }
 
 impl Unit {
-    pub const ALL: [Self; 2] = [Self::CubicMetre, Self::Litre];
+    pub const ALL: [Self; 3] = [Self::CubicMetre, Self::Litre, Self::CubicCentimetre];
 }
 
 impl Display for Unit {
@@ -22,6 +20,7 @@ impl Display for Unit {
             match self {
                 Self::CubicMetre => "m³",
                 Self::Litre => "L",
+                Self::CubicCentimetre => "cc",
             }
         )
     }
@@ -35,6 +34,7 @@ impl CubicMetre {
         match unit {
             Unit::CubicMetre => Self(value.into()),
             Unit::Litre => Self::from(Litre(value.into())),
+            Unit::CubicCentimetre => Self::from(CubicCentimetre(value.into())),
         }
     }
 }
@@ -45,26 +45,39 @@ impl From<Litre> for CubicMetre {
     }
 }
 
-#[derive(Debug, PartialEq)]
-struct Litre(f64);
-
-impl<F: Into<f64>> From<F> for Litre {
-    fn from(value: F) -> Self {
-        Self(value.into())
+impl From<CubicCentimetre> for CubicMetre {
+    fn from(value: CubicCentimetre) -> Self {
+        Self(value.0 * 10_f64.powi(-6))
     }
 }
 
+#[derive(Debug, PartialEq)]
+struct Litre(f64);
+
 impl From<CubicMetre> for Litre {
     fn from(value: CubicMetre) -> Self {
         Self(value.0 * 10_f64.powi(3))
     }
 }
 
-impl<F: Into<f64>> Mul<F> for Litre {
-    type Output = Self;
+impl From<CubicCentimetre> for Litre {
+    fn from(value: CubicCentimetre) -> Self {
+        Self(value.0 * 10_f64.powi(-3))
+    }
+}
+
+#[derive(Debug, PartialEq)]
+pub struct CubicCentimetre(f64);
+
+impl From<CubicMetre> for CubicCentimetre {
+    fn from(value: CubicMetre) -> Self {
+        Self(value.0 * 10_f64.powi(6))
+    }
+}
 
-    fn mul(self, rhs: F) -> Self::Output {
-        Self(self.0 * rhs.into())
+impl From<Litre> for CubicCentimetre {
+    fn from(value: Litre) -> Self {
+        Self(value.0 * 10_f64.powi(3))
     }
 }
 
@@ -73,25 +86,58 @@ pub fn convert<F: Into<f64>>(val: F, from: Unit, to: Unit) -> f64 {
         Unit::CubicMetre => match to {
             Unit::CubicMetre => val.into(),
             Unit::Litre => Litre::from(CubicMetre(val.into())).0,
+            Unit::CubicCentimetre => CubicCentimetre::from(CubicMetre(val.into())).0,
         },
         Unit::Litre => match to {
             Unit::Litre => val.into(),
             Unit::CubicMetre => CubicMetre::from(Litre(val.into())).0,
+            Unit::CubicCentimetre => CubicCentimetre::from(Litre(val.into())).0,
+        },
+        Unit::CubicCentimetre => match to {
+            Unit::CubicCentimetre => val.into(),
+            Unit::CubicMetre => CubicMetre::from(CubicCentimetre(val.into())).0,
+            Unit::Litre => Litre::from(CubicCentimetre(val.into())).0,
         },
     }
 }
 
 #[cfg(test)]
 mod tests {
-    use super::{CubicMetre, Litre};
+    use super::{CubicCentimetre, CubicMetre, Litre};
+
+    #[test]
+    fn cubic_metre_to_litre() {
+        assert_eq!(Litre::from(CubicMetre(1.)), Litre(1000.));
+    }
+
+    #[test]
+    fn cubic_metre_to_cubic_centimetre() {
+        assert_eq!(
+            CubicCentimetre::from(CubicMetre(1.)),
+            CubicCentimetre(1_000_000.)
+        );
+    }
 
     #[test]
     fn litre_to_cubic_metre() {
-        assert_eq!(CubicMetre::from(Litre(1000.)), CubicMetre(1.))
+        assert_eq!(CubicMetre::from(Litre(1000.)), CubicMetre(1.));
     }
 
     #[test]
-    fn cubic_metre_to_litre() {
-        assert_eq!(Litre::from(CubicMetre(1.)), Litre(1000.))
+    fn litre_to_cubic_centimetre() {
+        assert_eq!(CubicCentimetre::from(Litre(1.)), CubicCentimetre(1000.));
+    }
+
+    #[test]
+    fn cubic_centimetre_to_cubic_metre() {
+        assert_eq!(
+            CubicMetre::from(CubicCentimetre(1_000_000.)),
+            CubicMetre(1.)
+        );
+    }
+
+    #[test]
+    fn cubic_centimetre_to_litre() {
+        assert_eq!(Litre::from(CubicCentimetre(1000.)), Litre(1.));
     }
 }
-- 
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