add defense attribute to player and monster

macros/src/lib.rs

@@ -24,6 +24,7 @@ pub fn create_monsters(input: TokenStream) -> TokenStream {
             experience_gain: usize,
             ticks_between_steps: u128,
             damage_range: RangeInclusive<usize>,
+            defense: usize,
         }
         impl Monster for #variant_name {
             fn get_name(&self) -> &str { &self.name }
@@ -35,7 +36,7 @@ pub fn create_monsters(input: TokenStream) -> TokenStream {
             }
             fn get_ticks_between_steps(&self) -> u128 { self.ticks_between_steps }
             fn damage(&self) -> usize { rand::thread_rng().gen_range(self.damage_range.clone()) }
-
+            fn defense(&self) -> usize { self.defense }
             #[cfg(test)]
             fn get_life(&self) -> usize { self.life }
         }

src/game.rs

@@ -164,7 +164,7 @@ impl Game {
         match m {
             None => {}
             Some(m) => {
-                let player_dmg = self.player.damage();
+                let player_dmg = self.player.damage().saturating_sub(m.defense());
                 m.decrease_life(player_dmg);
                 if m.is_dead() {
                     let level_up: bool = self.player.gain_experience(m.get_experience_gain());
@@ -192,8 +192,8 @@ impl Game {
                         0,
                         format!("you hit {} for {} damage.", m.get_name(), player_dmg).to_string(),
                     );
-                    let monster_dmg = m.damage() as i16;
-                    self.player.change_life(-monster_dmg);
+                    let monster_dmg =m.damage().saturating_sub(self.player.defense());
+                    self.player.change_life(-(monster_dmg as i16));
 
                     self.messages.insert(
                         0,

src/level.rs

@@ -147,8 +147,8 @@ impl Level {
                     if player.get_immutable_position().get_x() == new_x
                         && player.get_immutable_position().get_y() == new_y
                     {
-                        let monster_dmg = self.monsters[index].damage() as i16;
-                        player.change_life(-monster_dmg);
+                        let monster_dmg =self.monsters[index].damage().saturating_sub(player.defense());
+                        player.change_life(-(monster_dmg as i16));
                         if player.is_dead() {
                             messages.insert(
                                 0,
@@ -172,7 +172,7 @@ impl Level {
                             // player not dead => monster can occupy new position
                             self.monsters[index].get_position().change(-dx, -dy);
                             // player fights back
-                            let player_dmg = player.damage();
+                            let player_dmg = player.damage().saturating_sub(self.monsters[index].defense());
                             self.monsters[index].decrease_life(player_dmg);
                             if self.monsters[index].is_dead() {
                                 let level_up: bool = player

src/main.rs

@@ -109,9 +109,10 @@ fn main() -> Result<()> {
                 .style(Style::default().bg(Color::Blue));
             frame.render_widget(
                 Paragraph::new(format!(
-                    "Health: {} of {}\nExp: {}\nGold: {}\nLevel: {} of {}\nInventory used: {} of {}",
+                    "Health: {} of {}\nDefense: {}\nExp: {}\nGold: {}\nLevel: {} of {}\nInventory used: {} of {}",
                     game.get_player().get_life(),
                     game.get_player().get_max_life(),
+                    game.get_player().defense(),
                     game.get_player().get_experience(),
                     game.get_player().get_gold(),
                     game.get_player().get_immutable_position().get_level() + 1,

src/monster.rs

@@ -16,6 +16,7 @@ pub trait Monster: HasPosition {
     #[cfg(test)]
     fn get_life(&self) -> usize;
     fn damage(&self) -> usize;
+    fn defense(&self) -> usize;
 }
 
 #[derive(CreateMonsters, PartialEq, Eq, Hash, Clone, Copy)]
@@ -49,6 +50,7 @@ create_monster!(
     experience_gain: 5,
     ticks_between_steps: 5,
     damage_range: 1..=2,
+    defense: 0,
 );
 
 create_monster!(
@@ -60,6 +62,7 @@ create_monster!(
     experience_gain: 7,
     ticks_between_steps: 7,
     damage_range: 2..=3,
+    defense: 0,
 );
 
 create_monster!(
@@ -71,6 +74,7 @@ create_monster!(
     experience_gain: 10,
     ticks_between_steps: 10,
     damage_range: 2..=3,
+    defense: 0,
 );
 
 create_monster!(
@@ -82,6 +86,7 @@ create_monster!(
     experience_gain: 10,
     ticks_between_steps: 20,
     damage_range: 1..=4,
+    defense: 0,
 );
 
 create_monster!(
@@ -93,6 +98,7 @@ create_monster!(
     experience_gain: 20,
     ticks_between_steps: 10,
     damage_range: 1..=5,
+    defense: 0,
 );
 
 pub fn create_monster_by_type(monster_type: &MonsterTypes, position: Position) -> Box<dyn Monster> {

src/player.rs

@@ -15,6 +15,7 @@ pub struct Player {
     inventory: Vec<Potion>,
     inventory_slots: usize,
     level: usize,
+    defense: usize,
 }
 
 impl Player {
@@ -29,6 +30,7 @@ impl Player {
             inventory: vec![],
             inventory_slots: 2,
             level: 1,
+            defense: 0,
         }
     }
     pub fn get_name(&self) -> String {
@@ -67,7 +69,9 @@ impl Player {
         for (i, level_step) in get_level_ladder().enumerate() {
             if self.experience <= level_step && self.experience + amount > level_step {
                 self.level += 1;
+                // make life gain depend on level?
                 self.max_life += 5;
+                self.defense += 1;
                 self.life = self.max_life;
                 result = true;
                 break;
@@ -92,6 +96,10 @@ impl Player {
         rand::thread_rng().gen_range(1..4)
     }
 
+    pub fn defense(&self) -> usize {
+        self.defense
+    }
+    
     pub fn add_to_inventory(&mut self, potion: &Potion) -> bool {
         if self.inventory.len() < self.inventory_slots {
             self.inventory.push(*potion);
@@ -138,6 +146,7 @@ fn test_get_name() {
         inventory: vec![],
         inventory_slots: 1,
         level: 0,
+        defense: 0,
     };
     assert_eq!(p.get_name(), "Teddy Tester");
 }
@@ -164,6 +173,7 @@ fn test_change_life() {
         inventory: vec![],
         inventory_slots: 1,
         level: 0,
+        defense: 0,
     };
     assert_eq!(p.get_life(), 5);
     p.change_life(-2);
@@ -200,6 +210,7 @@ fn test_max_life() {
         inventory: vec![],
         inventory_slots: 1,
         level: 0,
+        defense: 0,
     };
     assert_eq!(p.get_max_life(), 10);
 }