add mechanism for level gain

src/player.rs

@@ -2,6 +2,7 @@ use rand::Rng;
 use std::cmp::{max, min};
 
 use crate::artifacts::Potion;
+use crate::level_ladder::get_level_ladder;
 use crate::position::{HasPosition, Position};
 
 pub struct Player {
@@ -13,6 +14,7 @@ pub struct Player {
     experience: usize,
     inventory: Vec<Potion>,
     inventory_slots: usize,
+    level: usize,
 }
 
 impl Player {
@@ -26,6 +28,7 @@ impl Player {
             experience: 0,
             inventory: vec![],
             inventory_slots: 2,
+            level: 1,
         }
     }
     pub fn get_name(&self) -> String {
@@ -59,8 +62,26 @@ impl Player {
         self.gold
     }
 
-    pub fn gain_experience(&mut self, amount: usize) {
-        self.experience += amount
+    pub fn gain_experience(&mut self, amount: usize) -> bool {
+        let mut result = false;
+        for (i, level_step) in get_level_ladder().enumerate() {
+            if self.experience <= level_step && self.experience + amount > level_step {
+                self.level += 1;
+                self.max_life += 5;
+                self.life = self.max_life;
+                result = true;
+                break;
+            }
+            if i > self.level {
+                break;
+            }
+        }
+        self.experience += amount;
+        result
+    }
+
+    pub fn get_experience_level(&self) -> usize {
+        self.level
     }
 
     pub fn get_experience(&self) -> usize {
@@ -116,6 +137,7 @@ fn test_get_name() {
         experience: 0,
         inventory: vec![],
         inventory_slots: 1,
+        level: 0,
     };
     assert_eq!(p.get_name(), "Teddy Tester");
 }
@@ -141,6 +163,7 @@ fn test_change_life() {
         experience: 0,
         inventory: vec![],
         inventory_slots: 1,
+        level: 0,
     };
     assert_eq!(p.get_life(), 5);
     p.change_life(-2);
@@ -176,6 +199,7 @@ fn test_max_life() {
         experience: 0,
         inventory: vec![],
         inventory_slots: 1,
+        level: 0,
     };
     assert_eq!(p.get_max_life(), 10);
 }