Add Artifacts

src/artifacts.rs

@@ -0,0 +1,16 @@
+use crate::position::Position;
+
+pub struct Artifact {
+    position: Position,
+}
+
+impl Artifact {
+    pub fn new(position: Position) -> Self {
+        Artifact {
+            position,
+        }
+    }
+    pub fn get_immutable_position(&self) -> &Position {
+        &self.position
+    }
+}

src/level.rs

@@ -1,4 +1,5 @@
 use std::cmp::{max, min};
+use crate::artifacts::Artifact;
 use crate::monster::Monster;
 use crate::position::Position;
 
@@ -19,6 +20,7 @@ pub struct Level {
     structure: [[StructureElement; LEVEL_HEIGHT]; LEVEL_WIDTH],
     discovered: [[bool; LEVEL_HEIGHT]; LEVEL_WIDTH],
     monsters: Vec<Monster>,
+    artifacts: Vec<Artifact>,
 }
 
 impl Level {
@@ -34,30 +36,49 @@ impl Level {
             structure: s,
             discovered: [[false; LEVEL_HEIGHT]; LEVEL_WIDTH],
             monsters: Vec::with_capacity(10),
+            artifacts: Vec::with_capacity(10),
         }
     }
-    pub fn get_element(&mut self, x: i16, y: i16) -> (Option<StructureElement>, Option<&mut Monster>) {
+    pub fn get_element(&mut self, x: i16, y: i16) -> (Option<StructureElement>, Option<&mut Monster>, Option<&mut Artifact>) {
         if x < 0 || y < 0 {
-            return (None, None);
+            return (None, None, None);
         }
         let x = x as usize;
         let y = y as usize;
         if x >= LEVEL_WIDTH || y >= LEVEL_HEIGHT {
-            return (None, None);
+            return (None, None, None);
         }
         if !self.discovered[x][y] {
-            return (Some(StructureElement::Unknown), None);
+            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_position() == &mut Position::new(self.level, x, y) {
+            if m.get_immutable_position() == search_pos {
                 res_m = Some(m);
             }
         }
-
-        (Some(self.structure[x][y]), res_m)
+        let mut res_a: Option<&mut Artifact> = None;
+        for a in &mut self.artifacts {
+            if a.get_immutable_position() == search_pos {
+                res_a = Some(a);
             }
-    // pub fn remove_monster(&mut self, mut monster: Monster) -> Result<(), String> {
+        }
+        (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());
@@ -73,19 +94,30 @@ impl Level {
         }
         Ok(())
     }
-    pub fn add_monster(&mut self, mut monster: Monster) -> Result<(), String> {
-        if self.level != monster.get_position().get_level() {
+    pub fn add_artifact(&mut self, mut artifact: Artifact) -> Result<(), String> {
+        if self.level != artifact.get_immutable_position().get_level() {
             return Err("Wrong Level".to_string());
         }
-        for m in &mut self.monsters {
-            if m.get_position() == monster.get_position() {
+        for a in &mut self.artifacts {
+            if a.get_immutable_position() == artifact.get_immutable_position() {
                 return Err("Position already used".to_string());
             }
         }
-        self.monsters.push(monster);
+        self.artifacts.push(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();
@@ -174,6 +206,22 @@ fn test_discover_can_add_monster() {
     assert_eq!(l.add_monster(m), Ok(()));
 }
 
+#[test]
+fn test_discover_can_add_artifact() {
+    let mut l = Level::new(0);
+    let a = Artifact::new(Position::new(1, 2, 3));
+    assert_eq!(l.add_artifact(a), Err("Wrong Level".to_string()));
+
+    let a = Artifact::new(Position::new(0, 2, 3));
+    assert_eq!(l.add_artifact(a), Ok(()));
+
+    let a = Artifact::new(Position::new(0, 2, 3));
+    assert_eq!(l.add_artifact(a), Err("Position already used".to_string()));
+
+    let a = Artifact::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);
@@ -196,6 +244,23 @@ fn test_discover_get_monster() {
     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 = Artifact::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());
+    let a = elem.2.unwrap();
+}
+
 #[test]
 fn test_discover_get_monster_can_move() {
     let mut l = Level::new(0);

src/main.rs

@@ -6,6 +6,7 @@ mod player;
 mod level;
 mod position;
 mod monster;
+mod artifacts;
 
 fn main() {
     let mut p = Player::new("Teddy Tester", 10);

src/monster.rs

@@ -1,5 +1,3 @@
-use std::cmp::max;
-
 use crate::position::Position;
 
 pub struct Monster {
@@ -16,8 +14,8 @@ impl Monster {
     }
     pub fn get_life(&self) -> usize { self.life }
     pub fn is_dead(&self) -> bool { self.life <= 0 }
-    pub fn decrease_life(&mut self, by: i16) {
-        self.life = max(0, self.life as i16 - by) as usize;
+    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