squirrel-battle/squirrelbattle/entities/items.py

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# Copyright (C) 2020 by ÿnérant, eichhornchen, nicomarg, charlse
# SPDX-License-Identifier: GPL-3.0-or-later
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from random import choice, randint
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from typing import Optional
from ..interfaces import Entity, FightingEntity, Map, InventoryHolder
from ..translations import gettext as _
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class Item(Entity):
"""
A class for items.
"""
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held: bool
held_by: Optional[InventoryHolder]
price: int
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def __init__(self, held: bool = False,
held_by: Optional[InventoryHolder] = None,
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price: int = 2, *args, **kwargs):
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super().__init__(*args, **kwargs)
self.held = held
self.held_by = held_by
self.price = price
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@property
def description(self) -> str:
"""
In the inventory, indicate the usefulness of the item.
"""
return ""
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def drop(self) -> None:
"""
The item is dropped from the inventory onto the floor.
"""
if self.held:
self.held_by.remove_from_inventory(self)
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self.held_by.map.add_entity(self)
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self.move(self.held_by.y, self.held_by.x)
self.held = False
self.held_by = None
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def use(self) -> None:
"""
Indicates what should be done when the item is used.
"""
def equip(self) -> None:
"""
Indicates what should be done when the item is equipped.
"""
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# Other objects are only equipped as secondary.
if self.held_by.equipped_secondary:
self.held_by.equipped_secondary.unequip()
self.held_by.remove_from_inventory(self)
self.held_by.equipped_secondary = self
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def unequip(self) -> None:
"""
Indicates what should be done when the item is unequipped.
"""
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self.held_by.remove_from_inventory(self)
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self.held_by.add_to_inventory(self)
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def hold(self, holder: InventoryHolder) -> None:
"""
The item is taken from the floor and put into the inventory.
"""
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self.held = True
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self.held_by = holder
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self.held_by.map.remove_entity(self)
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holder.add_to_inventory(self)
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def save_state(self) -> dict:
"""
Saves the state of the item into a dictionary.
"""
d = super().save_state()
d["held"] = self.held
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return d
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@staticmethod
def get_all_items() -> list:
"""
Returns the list of all item classes.
"""
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return [BodySnatchPotion, Bomb, Heart, Shield, Sword,
Chestplate, Helmet, RingCritical, RingXP]
def be_sold(self, buyer: InventoryHolder, seller: InventoryHolder) -> bool:
"""
Does all necessary actions when an object is to be sold.
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Is overwritten by some classes that cannot exist in the player's
inventory.
"""
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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
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else:
return False
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class Heart(Item):
"""
A heart item to return health to the player.
"""
healing: int
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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
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@property
def description(self) -> str:
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return f"HP+{self.healing}"
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def hold(self, entity: InventoryHolder) -> None:
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"""
When holding a heart, the player is healed and
the item is not put in the inventory.
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"""
entity.health = min(entity.maxhealth, entity.health + self.healing)
entity.map.remove_entity(self)
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def save_state(self) -> dict:
"""
Saves the state of the heart into a dictionary.
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"""
d = super().save_state()
d["healing"] = self.healing
return d
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class Bomb(Item):
"""
A bomb item intended to deal damage to enemies at long range
"""
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damage: int = 5
exploding: bool
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owner: Optional["InventoryHolder"]
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tick: int
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def __init__(self, name: str = "bomb", damage: int = 5,
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
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self.owner = None
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def use(self) -> None:
"""
When the bomb is used, it is thrown and then it explodes.
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"""
if self.held:
self.owner = self.held_by
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super().drop()
self.exploding = True
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def act(self, m: Map) -> None:
"""
Special exploding action of the bomb.
"""
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if self.exploding:
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if self.tick > 0:
# The bomb will explode in <tick> moves
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self.tick -= 1
else:
# The bomb is exploding.
# Each entity that is close to the bomb takes damages.
# The player earn XP if the entity was killed.
log_message = _("Bomb is exploding.")
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for e in m.entities.copy():
if abs(e.x - self.x) + abs(e.y - self.y) <= 3 and \
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isinstance(e, FightingEntity):
log_message += " " + e.take_damage(self, self.damage)
if e.dead:
self.owner.add_xp(randint(3, 7))
m.logs.add_message(log_message)
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m.entities.remove(self)
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# Add sparkles where the bomb exploded.
explosion = Explosion(y=self.y, x=self.x)
self.map.add_entity(explosion)
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def save_state(self) -> dict:
"""
Saves the state of the bomb into a dictionary.
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"""
d = super().save_state()
d["exploding"] = self.exploding
d["damage"] = self.damage
return d
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class Explosion(Item):
"""
When a bomb explodes, the explosion is displayed.
"""
def __init__(self, *args, **kwargs):
super().__init__(name="explosion", *args, **kwargs)
def act(self, m: Map) -> None:
"""
The bomb disappears after exploding.
"""
m.remove_entity(self)
def hold(self, player: InventoryHolder) -> None:
"""
The player can't hold an explosion.
"""
class Weapon(Item):
"""
Non-throwable items that improve player damage
"""
damage: int
def __init__(self, damage: int = 3, *args, **kwargs):
super().__init__(*args, **kwargs)
self.damage = damage
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@property
def description(self) -> str:
return f"STR+{self.damage}" if self.damage else super().description
def save_state(self) -> dict:
"""
Saves the state of the weapon into a dictionary
"""
d = super().save_state()
d["damage"] = self.damage
return d
def equip(self) -> None:
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"""
When a weapon is equipped, the player gains strength.
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"""
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self.held_by.remove_from_inventory(self)
self.held_by.equipped_main = self
self.held_by.strength += self.damage
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def unequip(self) -> None:
"""
Remove the strength earned by the weapon.
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:return:
"""
super().unequip()
self.held_by.strength -= self.damage
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class Sword(Weapon):
"""
A basic weapon
"""
def __init__(self, name: str = "sword", price: int = 20,
*args, **kwargs):
super().__init__(name=name, price=price, *args, **kwargs)
class Armor(Item):
"""
Class of items that increase the player's constitution.
"""
constitution: int
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def __init__(self, constitution: int, *args, **kwargs):
super().__init__(*args, **kwargs)
self.constitution = constitution
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@property
def description(self) -> str:
return f"CON+{self.constitution}" if self.constitution \
else super().description
def equip(self) -> None:
super().equip()
self.held_by.constitution += self.constitution
def unequip(self) -> None:
super().unequip()
self.held_by.constitution -= self.constitution
def save_state(self) -> dict:
d = super().save_state()
d["constitution"] = self.constitution
return d
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class Shield(Armor):
"""
Class of shield items, they can be equipped in the other hand.
"""
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def __init__(self, name: str = "shield", constitution: int = 2,
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price: int = 16, *args, **kwargs):
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super().__init__(name=name, constitution=constitution, price=price,
*args, **kwargs)
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class Helmet(Armor):
"""
Class of helmet items, they can be equipped on the head.
"""
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def __init__(self, name: str = "helmet", constitution: int = 2,
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price: int = 18, *args, **kwargs):
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super().__init__(name=name, constitution=constitution, price=price,
*args, **kwargs)
def equip(self) -> None:
if self.held_by.equipped_helmet:
self.held_by.equipped_helmet.unequip()
self.held_by.remove_from_inventory(self)
self.held_by.equipped_helmet = self
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class Chestplate(Armor):
"""
Class of chestplate items, they can be equipped on the body.
"""
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def __init__(self, name: str = "chestplate", constitution: int = 4,
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price: int = 30, *args, **kwargs):
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super().__init__(name=name, constitution=constitution, price=price,
*args, **kwargs)
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def equip(self) -> None:
if self.held_by.equipped_armor:
self.held_by.equipped_armor.unequip()
self.held_by.remove_from_inventory(self)
self.held_by.equipped_armor = self
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class BodySnatchPotion(Item):
"""
The body-snatch potion allows to exchange all characteristics with a random
other entity.
"""
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def __init__(self, name: str = "body_snatch_potion", price: int = 14,
*args, **kwargs):
super().__init__(name=name, price=price, *args, **kwargs)
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def use(self) -> None:
"""
Find a valid random entity, then exchange characteristics.
"""
valid_entities = self.held_by.map.find_entities(FightingEntity)
valid_entities.remove(self.held_by)
entity = choice(valid_entities)
entity_state = entity.save_state()
player_state = self.held_by.save_state()
self.held_by.__dict__.update(entity_state)
entity.__dict__.update(player_state)
self.held_by.map.currenty, self.held_by.map.currentx = self.held_by.y,\
self.held_by.x
self.held_by.map.logs.add_message(
_("{player} exchanged its body with {entity}.").format(
player=self.held_by.translated_name.capitalize(),
entity=entity.translated_name))
self.held_by.recalculate_paths()
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self.held_by.inventory.remove(self)
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class Ring(Item):
"""
A class of rings that boost the player's statistics.
"""
maxhealth: int
strength: int
intelligence: int
charisma: int
dexterity: int
constitution: int
critical: int
experience: float
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def __init__(self, maxhealth: int = 0, strength: int = 0,
intelligence: int = 0, charisma: int = 0,
dexterity: int = 0, constitution: int = 0,
critical: int = 0, experience: float = 0, *args, **kwargs):
super().__init__(*args, **kwargs)
self.maxhealth = maxhealth
self.strength = strength
self.intelligence = intelligence
self.charisma = charisma
self.dexterity = dexterity
self.constitution = constitution
self.critical = critical
self.experience = experience
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@property
def description(self) -> str:
fields = [("MAX HP", self.maxhealth), ("STR", self.strength),
("INT", self.intelligence), ("CHR", self.charisma),
("DEX", self.dexterity), ("CON", self.constitution),
("CRI", self.critical), ("XP", self.experience)]
return ", ".join(f"{key}+{value}" for key, value in fields if value)
def equip(self) -> None:
super().equip()
self.held_by.maxhealth += self.maxhealth
self.held_by.strength += self.strength
self.held_by.intelligence += self.intelligence
self.held_by.charisma += self.charisma
self.held_by.dexterity += self.dexterity
self.held_by.constitution += self.constitution
self.held_by.critical += self.critical
self.held_by.xp_buff += self.experience
def unequip(self) -> None:
super().unequip()
self.held_by.maxhealth -= self.maxhealth
self.held_by.strength -= self.strength
self.held_by.intelligence -= self.intelligence
self.held_by.charisma -= self.charisma
self.held_by.dexterity -= self.dexterity
self.held_by.constitution -= self.constitution
self.held_by.critical -= self.critical
self.held_by.xp_buff -= self.experience
def save_state(self) -> dict:
d = super().save_state()
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d["maxhealth"] = self.maxhealth
d["strength"] = self.strength
d["intelligence"] = self.intelligence
d["charisma"] = self.charisma
d["dexterity"] = self.dexterity
d["constitution"] = self.constitution
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d["critical"] = self.critical
d["experience"] = self.experience
return d
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class RingCritical(Ring):
def __init__(self, name: str = "ring_of_critical_damage", price: int = 15,
critical: int = 20, *args, **kwargs):
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super().__init__(name=name, price=price, critical=critical,
*args, **kwargs)
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class RingXP(Ring):
def __init__(self, name: str = "ring_of_more_experience", price: int = 25,
experience: float = 2, *args, **kwargs):
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super().__init__(name=name, price=price, experience=experience,
*args, **kwargs)