Player now pays for what he buys and buying a heart does not put it in the inventory. Solves #38 and #36

squirrelbattle/entities/friendly.py

@@ -3,6 +3,7 @@ from ..translations import gettext as _
 from .player import Player
 from .items import Item
 from random import choice
+from typing import Dict, Tuple, Any
 
 
 class Merchant(FriendlyEntity):
@@ -51,6 +52,24 @@ class Merchant(FriendlyEntity):
         d["inventory"] = [item.save_state() for item in self.inventory]
         return d
     
+    def add_to_inventory(self, obj: Any) -> None:
+        """
+        Adds an object to inventory
+        """
+        self.inventory.append(obj)
+
+    def remove_from_inventory(self, obj: Any) -> None:
+        """
+        Removes an object from the inventory
+        """
+        self.inventory.remove(obj)
+
+    def change_hazel_balance(self, hz: int) -> None:
+        """
+        Change the number of hazel the merchant has by hz.
+        """
+        self.hazel += hz
+
 
 class Sunflower(FriendlyEntity):
     """

squirrelbattle/entities/items.py

@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from random import choice, randint
-from typing import Optional
+from typing import Optional, Any
 
 from .player import Player
 from ..interfaces import Entity, FightingEntity, Map
@@ -15,12 +15,14 @@ class Item(Entity):
     """
     held: bool
     held_by: Optional[Player]
+    price: int
 
-    def __init__(self, held: bool = False, held_by: Optional[Player] = None,
+    def __init__(self, held: bool = False, held_by: Optional[Player] = None, price : int=2,
                  *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.held = held
         self.held_by = held_by
+        self.price = price
 
     def drop(self) -> None:
         """
@@ -64,6 +66,19 @@ class Item(Entity):
     def get_all_items() -> list:
         return [BodySnatchPotion, Bomb, Heart, Sword]
 
+    def be_sold(self, buyer: Entity, seller: Entity, game :  Any) -> bool:
+        """
+        Does all necessary actions when an object is to be sold.
+        Is overwritten by some classes that cannot exist in the player's inventory
+        """
+        if buyer.hazel>=self.price :
+            buyer.add_to_inventory(self)
+            seller.remove_from_inventory(self)
+            buyer.change_hazel_balance(-self.price)
+            seller.change_hazel_balance(self.price)
+            return True
+        else :
+            return False
 
 class Heart(Item):
     """
@@ -71,8 +86,8 @@ class Heart(Item):
     """
     healing: int
 
-    def __init__(self, name: str = "heart", healing: int = 5, *args, **kwargs):
-        super().__init__(name=name, *args, **kwargs)
+    def __init__(self, name: str = "heart", healing: int = 5, price: int = 3, *args, **kwargs):
+        super().__init__(name=name, price=price, *args, **kwargs)
         self.healing = healing
 
     def hold(self, player: "Player") -> None:
@@ -90,6 +105,20 @@ class Heart(Item):
         d["healing"] = self.healing
         return d
 
+    def be_sold(self, buyer: Entity, seller: Entity, game: Any) -> str:
+        """
+        Does all necessary actions when an object is to be sold.
+        Is overwritten by some classes that cannot exist in the player's inventory
+        """
+        if buyer.hazel>=self.price :
+            self.hold(buyer)
+            seller.remove_from_inventory(self)
+            buyer.change_hazel_balance(-self.price)
+            seller.change_hazel_balance(self.price)
+            return True
+        else :
+            return False
+        
 
 class Bomb(Item):
     """
@@ -101,8 +130,8 @@ class Bomb(Item):
     tick: int
 
     def __init__(self, name: str = "bomb", damage: int = 5,
-                 exploding: bool = False, *args, **kwargs):
-        super().__init__(name=name, *args, **kwargs)
+                 exploding: bool = False, price: int = 4, *args, **kwargs):
+        super().__init__(name=name, price=price, *args, **kwargs)
         self.damage = damage
         self.exploding = exploding
         self.tick = 4
@@ -172,8 +201,8 @@ class Sword(Weapon):
     """
     A basic weapon
     """
-    def __init__(self, name: str = "sword", *args, **kwargs):
-        super().__init__(name=name, *args, **kwargs)
+    def __init__(self, name: str = "sword", price: int = 20, *args, **kwargs):
+        super().__init__(name=name, price=price, *args, **kwargs)
         self.name = name
 
 
@@ -183,8 +212,8 @@ class BodySnatchPotion(Item):
     other entity.
     """
 
-    def __init__(self, name: str = "body_snatch_potion", *args, **kwargs):
-        super().__init__(name=name, *args, **kwargs)
+    def __init__(self, name: str = "body_snatch_potion", price: int = 14, *args, **kwargs):
+        super().__init__(name=name, price=price, *args, **kwargs)
 
     def use(self) -> None:
         """

squirrelbattle/entities/player.py

@@ -70,6 +70,13 @@ class Player(FightingEntity):
         self.current_xp += xp
         self.level_up()
 
+    def change_hazel_balance(self, hz: int) -> None:
+        """
+        Change the number of hazel the player has by hz. hz is negative
+        when the player loses money and positive when he gains money
+        """
+        self.hazel += hz
+
     # noinspection PyTypeChecker,PyUnresolvedReferences
     def check_move(self, y: int, x: int, move_if_possible: bool = False) \
             -> bool:
@@ -125,6 +132,12 @@ class Player(FightingEntity):
         """
         self.inventory.append(obj)
 
+    def remove_from_inventory(self, obj: Any) -> None:
+        """
+        Removes an object from the inventory
+        """
+        self.inventory.remove(obj)
+
     def save_state(self) -> dict:
         """
         Saves the state of the entity into a dictionary

squirrelbattle/game.py

@@ -194,8 +194,10 @@ class Game:
         if self.store_menu.values and not self.player.dead:
             if key == KeyValues.ENTER:
                 item = self.store_menu.validate()
-                item.hold(self.player)
-                self.store_menu.merchant.inventory.remove(item)
+                flag = item.be_sold(self.player, self.store_menu.merchant, self)
+                if not flag :
+                    self.message = _("You do not have enough money")
+                    self.display_actions(DisplayActions.UPDATE)
             # Ensure that the cursor has a good position
             self.store_menu.position = min(self.store_menu.position,
                                            len(self.store_menu.values) - 1)