step to xp

src/game.rs

@@ -168,6 +168,10 @@ impl Game {
                 // TODO fight the monster
                 self.player.change_life(-1);
                 m.decrease_life(1);
+                // monster died, player gains experience
+                if m.is_dead() {
+                    self.player.gain_experience(m.get_experience_gain());
+                }
                 return m.is_dead();
             }
         };

src/main.rs

@@ -67,10 +67,11 @@ fn main() -> Result<()> {
                 height: 25,
             };
             frame.render_widget(
-                Paragraph::new(format!("{}\nHealth: {}/{}\nGold: {}\nLevel: {}",
+                Paragraph::new(format!("{}\nHealth: {}/{}\nExp: {}\nGold: {}\nLevel: {}",
                                        game.get_player().get_name(),
                                        game.get_player().get_life(),
                                        game.get_player().get_max_life(),
+                                       game.get_player().get_experience(),
                                        game.get_player().get_gold(),
                                        game.get_player().get_immutable_position().get_level()))
                     .white()
@@ -131,6 +132,7 @@ fn main() -> Result<()> {
                     "Congratulation! You mastered your way through the dungeon and won the game.".to_string()
                 }
             };
+            text += format!("\nYou gained {} experience.", game.get_player().get_experience()).as_str();
             text += format!("\nYou collected {} gold.", game.get_player().get_gold()).as_str();
             let paragraph = Paragraph::new(text).block(block).wrap(Wrap { trim: true });
             frame.render_widget(paragraph, area);

src/monster.rs

@@ -7,6 +7,7 @@ pub trait Monster {
     fn get_representation(&self) -> (&str, Color);
     fn decrease_life(&mut self, by: usize);
     fn get_immutable_position(&self) -> &Position;
+    fn get_experience_gain(&self) -> usize;
     #[cfg(test)]
     fn get_position(&mut self) -> &mut Position;
     #[cfg(test)]
@@ -17,6 +18,7 @@ macro_rules! default_monster {
     ($($t:ty),+ $(,)?) => ($(
         impl Monster for $t {
             fn is_dead(&self) -> bool { self.life <= 0 }
+            fn get_experience_gain(&self) -> usize { self.experience_gain }
             fn get_representation(&self) -> (&str, Color) { (&self.symbol, self.color) }
             fn decrease_life(&mut self, by: usize) {
                 self.life = self.life.saturating_sub(by);
@@ -39,6 +41,7 @@ pub struct Rat {
     position: Position,
     symbol: String,
     color: Color,
+    experience_gain: usize,
 }
 
 impl Rat {
@@ -49,6 +52,7 @@ impl Rat {
             position: Position::new(0, 0, 0),
             symbol: String::from("R"),
             color: Color::Black,
+            experience_gain: 5,
         }
     }
     pub fn new_with_position(position: Position) -> Self {
@@ -57,6 +61,7 @@ impl Rat {
             position,
             symbol: String::from("R"),
             color: Color::Black,
+            experience_gain: 5,
         }
     }
     #[cfg(test)]
@@ -69,6 +74,7 @@ pub struct Orc {
     position: Position,
     symbol: String,
     color: Color,
+    experience_gain: usize,
 }
 
 impl Orc {
@@ -79,6 +85,7 @@ impl Orc {
             position: Position::new(0, 0, 0),
             symbol: String::from("O"),
             color: Color::DarkGray,
+            experience_gain: 10,
         }
     }
     pub fn new_with_position(position: Position) -> Self {
@@ -87,6 +94,7 @@ impl Orc {
             position,
             symbol: String::from("O"),
             color: Color::DarkGray,
+            experience_gain: 10,
         }
     }
     #[cfg(test)]

src/player.rs

@@ -8,6 +8,7 @@ pub struct Player {
     life: i16,
     max_life: i16,
     gold: usize,
+    experience: usize,
 }
 
 impl Player {
@@ -18,6 +19,7 @@ impl Player {
             life: max_life,
             max_life,
             gold: 0,
+            experience: 0,
         }
     }
     pub fn get_name(&self) -> String {
@@ -44,6 +46,10 @@ impl Player {
 
     /// return the size of the players gold stash
     pub fn get_gold(&self) -> usize { self.gold }
+
+    pub fn gain_experience(&mut self, amount: usize) { self.experience += amount }
+
+    pub fn get_experience(&self) -> usize { self.experience }
 }
 
 #[test]
@@ -54,6 +60,7 @@ fn test_get_name() {
         life: 5,
         max_life: 10,
         gold: 0,
+        experience: 0,
     };
     assert_eq!(p.get_name(), "Teddy Tester");
 }
@@ -76,6 +83,7 @@ fn test_change_life() {
         life: 5,
         max_life: 10,
         gold: 0,
+        experience: 0,
     };
     assert_eq!(p.get_life(), 5);
     p.change_life(-2);
@@ -108,6 +116,7 @@ fn test_max_life() {
         life: 5,
         max_life: 10,
         gold: 0,
+        experience: 0,
     };
     assert_eq!(p.get_max_life(), 10);
 }