refactor: create ItemManger class

- add itemManager class and moved randomPosition and update into it
- add is_expired to check if time ran out to buy spawned item

src/item.py

@@ -6,6 +6,37 @@ from src.settings import (
 )
 
 
+class Item:
+    def __init__(self, x, y, item_type):
+        self.x = x
+        self.y = y
+        self.item_type = item_type
+
+        # collision rect for player (2 times item size for width and height)
+        self.rect = pygame.Rect(self.x, self.y, ITEM_SIZE, ITEM_SIZE)
+
+        # timer to store time when item appeared
+        self.spawn_time = pygame.time.get_ticks()
+
+        # try to load sprite
+        try:
+            path = f"assets/items/{item_type}.png"
+            self.image = pygame.image.load(path).convert_alpha()
+            self.image = pygame.transform.scale(self.image, (ITEM_SIZE, ITEM_SIZE))
+        except Exception as e:
+            print(f"Error loading item sprite {item_type}: {e}")
+            self.image = None
+
+    # to check if the time ran out to buy the item
+    def is_expired(self):
+        return pygame.time.get_ticks() - self.spawn_time >= ITEM_SPAWN_INTERVAL
+
+
+class ItemManger:
+    def __init__(self):
+        self.items = []
+        self.last_spawn_time = pygame.time.get_ticks()
+
     # try 50 times to find a free position to spawn item
     def _random_position(room_rect, blocked_rects):
         attempts = 0
@@ -34,6 +65,7 @@ def _random_position(room_rect, blocked_rects):
             # no spot after 50 attempts -> return
         return None
 
+
     # remove expired items
     def update(self, room_rect, blocked_rects):
         now = pygame.time.get_ticks()
@@ -46,33 +78,3 @@ def update(self, room_rect, blocked_rects):
 
             # replace the old list with the new temp_list
             self.items = remaining_items
-
-
-class Item:
-    def __init__(self, x, y, item_type):
-        self.x = x
-        self.y = y
-        self.item_type = item_type
-
-        # collision rect for player (2 times item size for width and height)
-        self.rect = pygame.Rect(self.x, self.y, ITEM_SIZE, ITEM_SIZE)
-
-        # timer to store time when item appeared
-        self.spawn_time = pygame.time.get_ticks()
-
-        # try to load sprite
-        try:
-            path = f"assets/items/{item_type}.png"
-            self.image = pygame.image.load(path).convert_alpha()
-            self.image = pygame.transform.scale(self.image, (ITEM_SIZE, ITEM_SIZE))
-        except Exception as e:
-            print(f"Error loading item sprite {item_type}: {e}")
-            self.image = None
-
-
-
-
-
-
-
-

src/settings.py

@@ -41,10 +41,12 @@ ECTS_UPDATE_INTERVAL = 1000     # time in ms (1000 = 1 sec)
 BEER_BOTTLE_ECTS_VALUE = 2
 BEER_COST = 50
 
+
 # --- BUTTONS ---
 COLOR_BUTTON = (0, 255, 0)
 COLOR_BUTTON_HOVER = (200, 255, 0)
 
+
 # --- STARTSCREEN ---
 COLOR_STARTSCREEN_BACKGROUND = ((0, 0, 0))
 COLOR_STARTSCREEN_FONT_TITLE = (0, 255, 0)
@@ -55,6 +57,7 @@ COLOR_STARTSCREEN_FONT_LABEL = (0, 255, 255)
 COFFEE_COST = 30
 COFFEE_HEAL_VALUE = 30
 
+
 # --- TOWER ---
 TOWER_COST = 150
 PROJECTILE_DMG = 15
@@ -62,11 +65,13 @@ PROJECTILE_SPEED = 7
 COLOR_PROJECTILE = (200, 200, 0)
 TOWER_TIMER = 30000             # how long the tower stays and attack before it disappears
 
+
 # --- ITEM SPAWN TIMER ---
 ITEM_SPAWN_INTERVAL = 5000      # ms until a new item spawns
 ITEM_SHOPPING_TIMER = 10000     # how long you have time to buy items before they despawn
 ITEM_SIZE = 30
 
+
 # --- ZOMBIE ---
 ZOMBIE_EASY_HP = 30
 ZOMBIE_EASY_DMG = 3