Add variable artifacts

src/artifacts.rs

@@ -0,0 +1,56 @@
+use crate::position::Position;
+use crate::player::Player;
+
+pub trait Artifact {
+    //! An artifact that can be collected by the player
+    /// get the position of the artifact in the level
+    fn get_immutable_position(&self) -> &Position;
+    /// call to apply the effects of the artifact to the player
+    fn collect(&mut self, player: &mut Player);
+}
+
+pub struct Chest {
+    /// a chest that contains some gold
+    position: Position,
+    gold: usize,
+}
+
+impl Chest {
+    pub fn new(position: Position) -> Self {
+        Self {
+            position,
+            gold: 10,
+        }
+    }
+}
+
+impl Artifact for Chest {
+    fn get_immutable_position(&self) -> &Position { &self.position }
+    fn collect(&mut self, player: &mut Player) {
+        player.retrieve_gold(self.gold);
+        self.gold = 0;
+    }
+}
+
+pub struct Potion {
+    /// a potion that restores some health
+    position: Position,
+    health: usize,
+}
+
+impl Potion {
+    pub fn new(position: Position) -> Self {
+        Self {
+            position,
+            health: 5,
+        }
+    }
+}
+
+impl Artifact for Potion {
+    fn get_immutable_position(&self) -> &Position { &self.position }
+    fn collect(&mut self, player: &mut Player) {
+        player.change_life(self.health.try_into().unwrap());
+        self.health = 0;
+    }
+}

src/game.rs

@@ -1,7 +1,23 @@
 use crate::level::Level;
 use crate::player::Player;
 
-pub struct Game {
-    pub player: Player,
-    pub levels: [Level; 25]
+pub const LEVELS: usize = 2;
+
+pub struct Game<'game> {
+    pub player: &'game mut Player,
+    pub levels: Vec<Level>,
+}
+
+impl Game<'_> {
+    pub fn new(p: &mut Player) -> Game {
+        let mut v: Vec<Level> = Vec::with_capacity(LEVELS);
+        for d in 0..LEVELS {
+            let l = Level::new(d);
+            v.push(l);
+        }
+        Game {
+            player: p,
+            levels: v,
+        }
+    }
 }

src/level.rs

@@ -1,38 +1,298 @@
+use std::cmp::{max, min};
+use crate::artifacts::{Artifact, Chest, Potion};
+use crate::monster::Monster;
+use crate::position::Position;
+
+pub const LEVEL_WIDTH: usize = 50;
+pub const LEVEL_HEIGHT: usize = 25;
+
 #[derive(Copy, Clone, Debug, PartialEq)]
-enum LevelElement {
+pub enum StructureElement {
     Wall,
     Floor,
     StairDown,
     StairUp,
+    Unknown,
 }
 
-#[derive(Copy, Clone, Debug, PartialEq)]
 pub struct Level {
-    structure: [[LevelElement; 25]; 80],
+    level: usize,
+    structure: [[StructureElement; LEVEL_HEIGHT]; LEVEL_WIDTH],
+    discovered: [[bool; LEVEL_HEIGHT]; LEVEL_WIDTH],
+    monsters: Vec<Monster>,
+    artifacts: Vec<Box<dyn Artifact>>,
 }
 
 impl Level {
-    pub fn new() -> Level {
-        let mut s = [[LevelElement::Wall; 25]; 80];
-        s[4][4] = LevelElement::StairDown;
-        s[75][20] = LevelElement::StairUp;
+    pub fn new(level: usize) -> Level {
+        let mut s = [[StructureElement::Wall; LEVEL_HEIGHT]; LEVEL_WIDTH];
+        for x in 2..LEVEL_WIDTH - 2 {
+            for y in 2..LEVEL_HEIGHT - 2 {
+                s[x][y] = StructureElement::Floor;
+            }
+        }
         Level {
-            structure: s
+            level,
+            structure: s,
+            discovered: [[false; LEVEL_HEIGHT]; LEVEL_WIDTH],
+            monsters: Vec::with_capacity(10),
+            artifacts: Vec::with_capacity(10),
         }
     }
-    pub fn get_element(&self, x: usize, y: usize) -> Option<LevelElement> {
-        if x >= 80 || y >= 25 {
-            return None;
+    pub fn get_element(&mut self, x: i16, y: i16) -> (Option<StructureElement>, Option<&mut Monster>, Option<&mut Box<(dyn Artifact + 'static)>>) {
+        if x < 0 || y < 0 {
+            return (None, None, None);
+        }
+        let x = x as usize;
+        let y = y as usize;
+        if x >= LEVEL_WIDTH || y >= LEVEL_HEIGHT {
+            return (None, None, None);
+        }
+        if !self.discovered[x][y] {
+            return (Some(StructureElement::Unknown), None, None);
+        }
+        let search_pos = &Position::new(self.level, x, y);
+        let mut res_m: Option<&mut Monster> = None;
+        for m in &mut self.monsters {
+            if m.get_immutable_position() == search_pos {
+                res_m = Some(m);
+            }
+        }
+        let mut res_a: Option<&mut Box<dyn Artifact>> = None;
+        for a in &mut self.artifacts {
+            if a.get_immutable_position() == search_pos {
+                res_a = Some(a);
+            }
+        }
+        (Some(self.structure[x][y]), res_m, res_a)
+    }
+    pub fn add_monster(&mut self, mut monster: Monster) -> Result<(), String> {
+        if self.level != monster.get_position().get_level() {
+            return Err("Wrong Level".to_string());
+        }
+        for m in &mut self.monsters {
+            if m.get_position() == monster.get_position() {
+                return Err("Position already used".to_string());
+            }
+        }
+        self.monsters.push(monster);
+        Ok(())
+    }
+
+    pub fn remove_dead_monster(&mut self, position: &Position) -> Result<(), String> {
+        if self.level != position.get_level() {
+            return Err("Wrong Level".to_string());
+        }
+        for (index, m) in &mut self.monsters.iter().enumerate() {
+            if m.get_immutable_position() == position {
+                if !m.is_dead() {
+                    return Err("Monster not dead".to_string());
+                }
+                self.monsters.remove(index);
+                break;
+            }
+        }
+        Ok(())
+    }
+    pub fn add_artifact(&mut self, artifact: impl Artifact + 'static) -> Result<(), String> {
+        if self.level != artifact.get_immutable_position().get_level() {
+            return Err("Wrong Level".to_string());
+        }
+        for a in &mut self.artifacts {
+            if a.get_immutable_position() == artifact.get_immutable_position() {
+                return Err("Position already used".to_string());
+            }
+        }
+        self.artifacts.push(Box::new(artifact));
+        Ok(())
+    }
+    pub fn remove_artifact(&mut self, position: &Position) -> Result<(), String> {
+        if self.level != position.get_level() {
+            return Err("Wrong Level".to_string());
+        }
+        for (index, a) in &mut self.artifacts.iter().enumerate() {
+            if a.get_immutable_position() == position {
+                self.monsters.remove(index);
+                break;
+            }
+        }
+        Ok(())
+    }
+    /// discover the area with in the level around the given position
+    pub fn discover(&mut self, pos: &Position) {
+        let x = pos.get_x();
+        let y = pos.get_y();
+
+        // uncover fields directly next to the player
+        for x_r in max(x - 1, 0)..=min(x + 1, LEVEL_WIDTH - 1) {
+            for y_r in max(y - 1, 0)..=min(y + 1, LEVEL_HEIGHT - 1) {
+                self.discovered[x_r][y_r] = true;
+            }
+        }
+
+        // uncover fields up to 2 fields right of the player
+        for x_r in x..=min(x + 2, LEVEL_WIDTH - 1) {
+            self.discovered[x_r][y] = true;
+            if self.structure[x_r][y] == StructureElement::Wall {
+                break;
+            }
+        }
+
+        // uncover fields up to 2 fields below of the player
+        for y_r in y..=min(y + 2, LEVEL_HEIGHT - 1) {
+            self.discovered[x][y_r] = true;
+            if self.structure[x][y_r] == StructureElement::Wall {
+                break;
+            }
+        }
+
+        // uncover fields up to 2 fields left of the player
+        for x_r in (max(x, 2)..x + 2).rev() {
+            self.discovered[x_r - 2][y] = true;
+            if self.structure[x_r - 2][y] == StructureElement::Wall {
+                break;
+            }
+        }
+
+        // uncover fields up to 2 fields above of the player
+        for y_r in (max(y, 2)..y + 2).rev() {
+            self.discovered[x][y_r - 2] = true;
+            if self.structure[x][y_r - 2] == StructureElement::Wall {
+                break;
+            }
         }
-        Some(self.structure[x][y])
     }
 }
 
 #[test]
 fn test_get_element() {
-    let l = Level::new();
-    assert_eq!(l.get_element(0, 0).unwrap(), LevelElement::Wall);
-    assert_eq!(l.get_element(4, 4).unwrap(), LevelElement::StairDown);
-    assert_eq!(l.get_element(79, 24).unwrap(), LevelElement::Wall);
-    assert_eq!(l.get_element(80, 25), None);
+    let mut l = Level::new(0);
+    assert_eq!(l.get_element(-1, -1).0, None);
+    assert_eq!(l.get_element(0, 0).0.unwrap(), StructureElement::Unknown);
+    assert_eq!(l.get_element(LEVEL_WIDTH as i16 - 1, LEVEL_HEIGHT as i16 - 1).0.unwrap(), StructureElement::Unknown);
+    assert_eq!(l.get_element(LEVEL_WIDTH as i16, LEVEL_HEIGHT as i16).0, None);
+}
+
+#[test]
+fn test_discover_get_element() {
+    let mut l = Level::new(0);
+    assert_eq!(l.get_element(10, 10).0.unwrap(), StructureElement::Unknown);
+    let p = Position::new(0, 10, 10);
+    l.discover(&p);
+    assert_eq!(l.get_element(10, 10).0.unwrap(), StructureElement::Floor);
+    assert_eq!(l.get_element(9, 10).0.unwrap(), StructureElement::Floor);
+    assert_eq!(l.get_element(10, 9).0.unwrap(), StructureElement::Floor);
+    assert_eq!(l.get_element(11, 10).0.unwrap(), StructureElement::Floor);
+    assert_eq!(l.get_element(10, 11).0.unwrap(), StructureElement::Floor);
+}
+
+#[test]
+fn test_discover_can_add_monster() {
+    let mut l = Level::new(0);
+    let mut m = Monster::new(2);
+    m.get_position().set(1, 2, 3);
+    assert_eq!(l.add_monster(m), Err("Wrong Level".to_string()));
+
+    let mut m = Monster::new(2);
+    m.get_position().set(0, 2, 3);
+    assert_eq!(l.add_monster(m), Ok(()));
+
+    let mut m = Monster::new(2);
+    m.get_position().set(0, 2, 3);
+    assert_eq!(l.add_monster(m), Err("Position already used".to_string()));
+
+    let mut m = Monster::new(2);
+    m.get_position().set(0, 2, 4);
+    assert_eq!(l.add_monster(m), Ok(()));
+}
+
+#[test]
+fn test_discover_can_add_artifact() {
+    let mut l = Level::new(0);
+    let a = Chest::new(Position::new(1, 2, 3));
+    assert_eq!(l.add_artifact(a), Err("Wrong Level".to_string()));
+
+    let a = Chest::new(Position::new(0, 2, 3));
+    assert_eq!(l.add_artifact(a), Ok(()));
+
+    let a = Potion::new(Position::new(0, 2, 3));
+    assert_eq!(l.add_artifact(a), Err("Position already used".to_string()));
+
+    let a = Chest::new(Position::new(0, 1, 3));
+    assert_eq!(l.add_artifact(a), Ok(()));
+}
+
+#[test]
+fn test_discover_get_monster() {
+    let mut l = Level::new(0);
+    let p = Position::new(0, 10, 10);
+    l.discover(&p);
+    assert_eq!(l.get_element(10, 10).0.unwrap(), StructureElement::Floor);
+    assert!(l.get_element(10, 10).1.is_none());
+
+    let mut m = Monster::new(23);
+    m.get_position().set(0, 10, 10);
+    assert_eq!(l.add_monster(m), Ok(()));
+
+    let elem = l.get_element(10, 10);
+    assert_eq!(elem.0.unwrap(), StructureElement::Floor);
+    assert!(elem.1.is_some());
+    let m = elem.1.unwrap();
+    assert_eq!(m.get_life(), 23);
+
+    m.decrease_life(2);
+    assert_eq!(l.get_element(10, 10).1.unwrap().get_life(), 21);
+}
+
+#[test]
+fn test_discover_get_artifact() {
+    let mut l = Level::new(0);
+    let p = Position::new(0, 10, 10);
+    l.discover(&p);
+    assert_eq!(l.get_element(10, 10).0.unwrap(), StructureElement::Floor);
+    assert!(l.get_element(10, 10).2.is_none());
+
+    let a = Chest::new(Position::new(0, 10, 10));
+    assert_eq!(l.add_artifact(a), Ok(()));
+
+    let elem = l.get_element(10, 10);
+    assert_eq!(elem.0.unwrap(), StructureElement::Floor);
+    assert!(elem.2.is_some());
+}
+
+#[test]
+fn test_discover_get_monster_can_move() {
+    let mut l = Level::new(0);
+    let p = Position::new(0, 10, 10);
+    l.discover(&p);
+
+    let mut m = Monster::new(23);
+    m.get_position().set(0, 10, 10);
+    l.add_monster(m).expect("Panic because of");
+
+    let m = l.get_element(10, 10).1.unwrap();
+    m.get_position().change(1, 1);
+
+    let m = l.get_element(10, 10).1;
+    assert!(m.is_none());
+    let m = l.get_element(11, 11).1;
+    assert!(m.is_some());
+    assert_eq!(m.unwrap().get_life(), 23);
+}
+
+#[test]
+fn test_monster_can_be_removed() {
+    let mut level = Level::new(0);
+    level.discover(&Position::new(0, 10, 10));
+
+    let mut m = Monster::new(2);
+    m.get_position().set(0, 10, 10);
+    level.add_monster(m).expect("Panic because of");
+
+    let m = level.get_element(10, 10).1.unwrap();
+    m.decrease_life(3);
+
+    assert_eq!(level.remove_dead_monster(&Position::new(0, 10, 10)), Ok(()));
+
+    assert!(level.get_element(10, 10).1.is_none());
 }

src/main.rs

@@ -1,16 +1,19 @@
 use crate::game::Game;
-use crate::level::Level;
 use crate::player::Player;
 
 mod game;
 mod player;
 mod level;
 mod position;
+mod monster;
+mod artifacts;
 
 fn main() {
-    let g = Game {
-        player: Player::new("Teddy Tester", 10),
-        levels: [Level::new();25]
-    };
+    let mut p = Player::new("Teddy Tester", 10);
+    let g = Game::new(&mut p);
+
     println!("{}",g.player.get_name());
+    println!("{}",g.player.get_life());
+    g.player.change_life(-1);
+    println!("{}",g.player.get_life());
 }

src/monster.rs

@@ -0,0 +1,51 @@
+use crate::position::Position;
+
+pub struct Monster {
+    life: usize,
+    position: Position,
+}
+
+impl Monster {
+    pub fn new(life: usize) -> Self {
+        Monster {
+            life,
+            position: Position::new(0, 0, 0),
+        }
+    }
+    pub fn get_life(&self) -> usize { self.life }
+    pub fn is_dead(&self) -> bool { self.life <= 0 }
+    pub fn decrease_life(&mut self, by: usize) {
+        self.life = self.life.saturating_sub(by);
+    }
+    pub fn get_position(&mut self) -> &mut Position {
+        &mut self.position
+    }
+    pub fn get_immutable_position(&self) -> &Position {
+        &self.position
+    }
+}
+
+#[test]
+fn monsters_can_move() {
+    let mut m = Monster::new(2);
+    assert_eq!(m.get_position(), &Position::new(0, 0, 0));
+    m.get_position().change(1, 2);
+    assert_eq!(m.get_position(), &Position::new(0, 1, 2));
+    m.get_position().change(2, 1);
+    assert_eq!(m.get_position(), &Position::new(0, 3, 3));
+    m.get_position().set(1, 2, 3);
+    m.get_position().change(2, 1);
+    assert_eq!(m.get_position(), &Position::new(1, 4, 4));
+}
+
+#[test]
+fn monsters_can_die() {
+    let mut m = Monster::new(2);
+    assert_eq!(m.get_life(), 2);
+    assert_eq!(m.is_dead(), false);
+    m.decrease_life(1);
+    assert_eq!(m.get_life(), 1);
+    m.decrease_life(2);
+    assert_eq!(m.get_life(), 0);
+    assert_eq!(m.is_dead(), true);
+}

src/player.rs

@@ -6,15 +6,17 @@ pub struct Player {
     position: Position,
     life: i16,
     max_life: i16,
+    gold: usize,
 }
 
 impl Player {
     pub fn new(name: &str, max_life: i16) -> Player {
         Player {
             name: name.to_string(),
-            position: Position::new(0, 1, 1),
+            position: Position::new(0, 0, 0),
             life: max_life,
             max_life,
+            gold: 0,
         }
     }
     pub fn get_name(&self) -> String {
@@ -23,6 +25,18 @@ impl Player {
     pub fn change_life(&mut self, by: i16) {
         self.life = max(0, min(self.max_life, self.life + by));
     }
+    pub fn get_life(&self) -> i16 {
+        self.life
+    }
+    pub fn get_position(&mut self) -> &mut Position {
+        &mut self.position
+    }
+
+    /// add the given amount to the players gold stash
+    pub fn retrieve_gold(&mut self, amount: usize) { self.gold += amount }
+
+    /// return the size of the players gold stash
+    pub fn get_gold(&self) -> usize { self.gold }
 }
 
 #[test]
@@ -32,10 +46,21 @@ fn test_get_name() {
         position: Position::new(0, 1, 1),
         life: 5,
         max_life: 10,
+        gold: 0,
     };
     assert_eq!(p.get_name(), "Teddy Tester");
 }
 
+#[test]
+fn test_can_receive_gold() {
+    let mut p = Player::new("Teddy Tester", 10);
+    assert_eq!(p.get_gold(), 0);
+
+    p.retrieve_gold(13);
+    p.retrieve_gold(10);
+    assert_eq!(p.get_gold(), 23);
+}
+
 #[test]
 fn test_change_life() {
     let mut p = Player {
@@ -43,6 +68,7 @@ fn test_change_life() {
         position: Position::new(0, 1, 1),
         life: 5,
         max_life: 10,
+        gold: 0,
     };
     assert_eq!(p.life, 5);
     p.change_life(-2);
@@ -51,4 +77,17 @@ fn test_change_life() {
     assert_eq!(p.life, 10);
     p.change_life(-12);
     assert_eq!(p.life, 0);
-}
+}
+
+#[test]
+fn player_can_move() {
+    let mut p = Player::new("Teddy Tester", 10);
+    assert_eq!(p.get_position(), &Position::new(0, 0, 0));
+    p.get_position().change(1, 2);
+    assert_eq!(p.get_position(), &Position::new(0, 1, 2));
+    p.get_position().change(2, 1);
+    assert_eq!(p.get_position(), &Position::new(0, 3, 3));
+    p.get_position().set(1, 2, 3);
+    p.get_position().change(2, 1);
+    assert_eq!(p.get_position(), &Position::new(1, 4, 4));
+}

src/position.rs

@@ -1,15 +1,35 @@
+#[derive(PartialEq, Debug)]
 pub struct Position {
-    level: u8,
-    x: u8,
-    y: u8,
+    level: usize,
+    x: usize,
+    y: usize,
 }
 
 impl Position {
-    pub fn new(level: u8, x: u8, y: u8) -> Self {
+    pub fn new(level: usize, x: usize, y: usize) -> Self {
         Self {
             level,
             x,
             y,
         }
     }
+    pub fn change(&mut self, dx: i16, dy: i16) {
+        self.x = ((self.x as i16) + dx) as usize;
+        self.y = ((self.y as i16) + dy) as usize;
+    }
+    pub fn set(&mut self, level: usize, x: usize, y: usize) {
+        self.level = level;
+        self.x = x;
+        self.y = y;
+    }
+
+    pub fn get_level(&self) -> usize {
+        self.level
+    }
+
+    pub fn get_x(&self) -> usize {
+        self.x
+    }
+
+    pub fn get_y(&self) -> usize { self.y }
 }