feat: assemble weapon and potions into item file

src/character.rs

@@ -1,4 +1,6 @@
-use crate::weapon::Weapon;
+use std::f64::consts::E;
+
+use crate::items::Item;
 
 /// # Character
 ///
@@ -24,67 +26,72 @@ use crate::weapon::Weapon;
 /// for method chaining.
 /// - `get_name` is only an accessor of `name`
 pub struct Character {
-    life: u8,
+    pub life: u8,
     name: &'static str,
-    weapon: Option<Box<Weapon>>,
+    item: Option<Box<dyn Item>>,
 }
 
 impl Character {
     /// Creates a new `Character` with the given attributes.
     /// Acts as a "static constructor" returning the
     /// initialized struct.
-    pub fn new(life: u8, name: &'static str, weapon: Option<Box<Weapon>>) -> Self {
-        Character { life, name, weapon }
+    pub fn new(name: &'static str, life: u8, item: Option<Box<dyn Item>>) -> Self {
+        Character { life, name, item }
     }
 
-    pub fn new_no_weapon(life: u8, name: &'static str) -> Self {
+    pub fn new_no_weapon(name: &'static str, life: u8) -> Self {
         Character {
             life,
             name,
-            weapon: None,
+            item: None,
         }
     }
 
-    /// Attacks another character, reducing their `life` by
-    /// self.damage. Returns `self` to allow method chaining.
-    pub fn attack(&mut self, other: &mut Self) -> &mut Self {
-        if let Some(w) = &mut self.weapon {
-            other.life = w
-                .if_not_broken(|damage: u8| other.life - damage)
-                .unwrap_or(0);
-            w.consume();
+    pub fn use_item(&mut self, other: Option<&mut Character>) -> () {
+        let mut item: Option<Box<dyn Item>> = self.item.take(); // pop item and replace to None
+        if let Some(i) = &mut item {
+            i.apply(other.unwrap_or(self));
         }
-        self
+        self.item = item;
     }
 
     /// Returns the character's name.
     pub fn get_name(&self) -> &str {
         self.name
     }
+
+    pub fn set_item(&mut self, item: Option<Box<dyn Item>>) -> &mut Self {
+        self.item = item;
+        self
+    }
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
+    use crate::items::{Potion, Weapon};
 
     #[test]
     /// Tests that a character is correctly initialized.
     fn character_build() {
-        let c = Character::new_no_weapon(100, "test");
+        let c = Character::new_no_weapon("test", 100);
         assert_eq!(c.life, 100);
         assert_eq!(c.name, c.get_name());
     }
 
     #[test]
     /// Tests that attacking reduces the target's life correctly.
-    fn character_attack() {
-        let w = Box::new(Weapon::new("test", 10, 100));
-        let mut c1 = Character::new(100, "test1", Option::Some(w));
-        let mut c2 = Character::new_no_weapon(200, "test2");
+    fn character_item() {
+        let w = Box::new(Weapon::new("testw", 10, 100));
+        let p = Box::new(Potion::new("testp", 50));
 
-        c1.attack(&mut c2);
-        assert_eq!(c2.life, 190);
-        Character::attack(&mut c2, &mut c1);
-        assert_eq!(c1.life, 100);
+        let mut c: Character = Character::new_no_weapon("testc", 100);
+        c.set_item(Some(p)).use_item(None);
+
+        assert_eq!(c.life, 150);
+
+        c.set_item(Some(w)).use_item(None);
+
+        assert_eq!(c.life, 140);
     }
 }

src/items.rs

@@ -0,0 +1,80 @@
+use crate::character::Character;
+
+pub trait Item {
+    fn apply(&mut self, char: &mut Character) -> ();
+    fn get_name(&self) -> &'static str;
+}
+
+pub struct Weapon {
+    name: &'static str,
+    damage: u8,
+    durability: u8,
+}
+
+// #[warn(dead_code)]
+impl Weapon {
+    pub fn new(name: &'static str, damage: u8, durability: u8) -> Self {
+        Weapon {
+            name,
+            damage,
+            durability,
+        }
+    }
+
+    fn reduce_durability(&mut self) -> () {
+        self.durability = self.durability.saturating_sub(self.damage / 2);
+    }
+
+    pub fn is_broken(&self) -> bool {
+        self.durability == 0
+    }
+}
+
+impl Item for Weapon {
+    fn apply(&mut self, char: &mut Character) -> () {
+        if !self.is_broken() {
+            char.life = char.life.saturating_sub(self.damage);
+            self.reduce_durability();
+        }
+    }
+
+    fn get_name(&self) -> &'static str {
+        self.name
+    }
+}
+
+pub struct Potion {
+    name: &'static str,
+    heal: u8,
+}
+
+impl Potion {
+    pub fn new(name: &'static str, heal: u8) -> Self {
+        Potion { name, heal }
+    }
+}
+
+impl Item for Potion {
+    fn apply(&mut self, char: &mut Character) -> () {
+        char.life += self.heal;
+    }
+
+    fn get_name(&self) -> &'static str {
+        self.name
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    mod weapon {
+        use super::super::*;
+
+        #[test]
+        fn build() {
+            let w = Weapon::new("test", 10, 100);
+            assert_eq!(w.damage, 10);
+            assert_eq!(w.durability, 100);
+            assert_eq!(w.get_name(), w.name);
+        }
+    }
+}

src/lib.rs

@@ -1,2 +1,2 @@
 pub mod character;
-pub mod weapon;
+pub mod items;

src/main.rs

@@ -1 +1,6 @@
-fn main() {}
+use bakersadventure::items::{Item, Weapon};
+
+fn main() {
+    let mut list: [Box<dyn Item>; 1] = [Box::new(Weapon::new("name", 1, 1))];
+    
+}

src/weapon.rs

@@ -1,66 +0,0 @@
-pub struct Weapon {
-    name: &'static str,
-    damage: u8,
-    durability: u8,
-}
-
-impl Weapon {
-    pub fn new(name: &'static str, damage: u8, durability: u8) -> Self {
-        Weapon {
-            name,
-            damage,
-            durability,
-        }
-    }
-
-    pub fn consume(&mut self) -> &mut Self {
-        self.durability -= (self.damage / 2) as u8;
-        self
-    }
-
-    fn is_broken(&self) -> bool {
-        self.durability <= 0
-    }
-
-    pub fn if_not_broken<F, T>(&mut self, fun: F) -> Option<T>
-    where
-        F: FnOnce(u8) -> T,
-    {
-        if !self.is_broken() {
-            Some(fun(self.damage))
-        } else {
-            None
-        }
-    }
-
-    pub fn get_name(&self) -> &'static str {
-        self.name
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn weapon_build() {
-        let w = Weapon::new("test", 10, 100);
-        assert_eq!(w.damage, 10);
-        assert_eq!(w.durability, 100);
-        assert_eq!(w.get_name(), w.name);
-    }
-
-    #[test]
-    fn weapon_consumption() {
-        let mut w = Weapon::new("test", 10, 100);
-        w.consume();
-        assert_eq!(w.durability, 95);
-    }
-
-    #[test]
-    fn weapon_if_not_broken() {
-        let mut w = Weapon::new("test", 10, 100);
-        let val: u8 = 50;
-        assert_eq!(w.if_not_broken(|d: u8| { val - d }).unwrap(), 40);
-    }
-}