fight monsters, collect artifacts

src/artifacts.rs

@@ -9,6 +9,7 @@ pub trait Artifact {
     fn get_immutable_position(&self) -> &Position;
     /// call to apply the effects of the artifact to the player
     fn collect(&mut self, player: &mut Player);
+    fn was_collected(&self) -> bool;
 }
 
 pub struct Chest {
@@ -36,6 +37,10 @@ impl Artifact for Chest {
         player.retrieve_gold(self.gold);
         self.gold = 0;
     }
+
+    fn was_collected(&self) -> bool {
+        self.gold == 0
+    }
 }
 
 pub struct Potion {
@@ -62,4 +67,8 @@ impl Artifact for Potion {
         player.change_life(self.health.try_into().unwrap());
         self.health = 0;
     }
+
+    fn was_collected(&self) -> bool {
+        self.health == 0
+    }
 }