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handler_npc.py
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handler_npc.py
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# PythonWars copyright © 2020, 2021 by Paul Penner. All rights reserved.
# In order to use this codebase you must comply with all licenses.
#
# Original Diku Mud copyright © 1990, 1991 by Sebastian Hammer,
# Michael Seifert, Hans Henrik Stærfeldt, Tom Madsen, and Katja Nyboe.
#
# Merc Diku Mud improvements copyright © 1992, 1993 by Michael
# Chastain, Michael Quan, and Mitchell Tse.
#
# ROM 2.4 is copyright 1993-1998 Russ Taylor. ROM has been brought to
# you by the ROM consortium: Russ Taylor (rtaylor@hypercube.org),
# Gabrielle Taylor (gtaylor@hypercube.org), and Brian Moore (zump@rom.org).
#
# Ported to Python by Davion of MudBytes.net using Miniboa
# (https://code.google.com/p/miniboa/).
#
# In order to use any part of this Merc Diku Mud, you must comply with
# both the original Diku license in 'license.doc' as well the Merc
# license in 'license.txt'. In particular, you may not remove either of
# these copyright notices.
#
# Much time and thought has gone into this software, and you are
# benefiting. We hope that you share your changes too. What goes
# around, comes around.
import copy
import hashlib
import os
import bit
import comm
import handler_item
import instance
import json
import living
import merc
import settings
class Npc(living.Living):
template_count = 0
instance_count = 0
def __init__(self, template=None, **kwargs):
super().__init__()
# self.is_npc = True
self.vnum = 0 # Needs to come before the template to setup the instance
self.is_pc = False
self.spec_fun = None
self.area = ""
self.powertype = ""
self.poweraction = ""
self.act = bit.Bit(flagset_name="act_flags")
self.count = 0
self.killed = 0
self.pshop = None
if kwargs:
[setattr(self, k, copy.deepcopy(v)) for k, v in kwargs.items()]
if template:
[setattr(self, k, copy.deepcopy(v)) for k, v in template.__dict__.items()]
self.instancer()
if self.environment:
if self._environment not in instance.global_instances.keys():
self.environment = None
if self.inventory:
for instance_id in self.inventory[:]:
handler_item.Items.load(instance_id=instance_id)
for item_id in self.equipped.values():
if item_id:
handler_item.Items.load(instance_id=item_id)
if self.instance_id:
self.instance_setup()
Npc.instance_count += 1
else:
Npc.template_count += 1
self._last_saved = None
self._md5 = None
def __del__(self):
try:
if self.instance_id:
Npc.instance_count -= 1
if instance.characters.get(self.instance_id, None):
self.instance_destructor()
else:
Npc.template_count -= 1
except:
return
def __repr__(self):
if self.instance_id:
return f"<NPC Instance: {self.short_descr} ID {self.instance_id} template {self.vnum}>"
else:
return f"<NPC Template: {self.short_descr}:{self.vnum}>"
def instance_setup(self):
instance.global_instances[self.instance_id] = self
instance.npcs[self.instance_id] = self
instance.characters[self.instance_id] = self
if self.vnum not in instance.instances_by_npc.keys():
instance.instances_by_npc[self.vnum] = [self.instance_id]
else:
instance.instances_by_npc[self.vnum] += [self.instance_id]
def instance_destructor(self):
instance.instances_by_npc[self.vnum].remove(self.instance_id)
del instance.npcs[self.instance_id]
del instance.characters[self.instance_id]
del instance.global_instances[self.instance_id]
# Serialization
def to_json(self, outer_encoder=None):
if outer_encoder is None:
outer_encoder = json.JSONEncoder.default
tmp_dict = {}
for k, v in self.__dict__.items():
if str(type(v)) in ("<class 'function'>", "<class 'method'>"):
continue
elif str(k) in ("desc", "send"):
continue
elif str(k) in ("_last_saved", "_md5"):
continue
else:
tmp_dict[k] = v
cls_name = "__class__/" + __name__ + "." + self.__class__.__name__
return {cls_name: outer_encoder(tmp_dict)}
@classmethod
def from_json(cls, data, outer_decoder=None):
if outer_decoder is None:
outer_decoder = json.JSONDecoder.decode
cls_name = "__class__/" + __name__ + "." + cls.__name__
if cls_name in data:
tmp_data = outer_decoder(data[cls_name])
return cls(**tmp_data)
return data
def save(self, force: bool = False):
if self.instance_id:
top_dir = settings.INSTANCE_DIR
number = self.instance_id
else:
top_dir = settings.AREA_DIR
number = self.vnum
if self.in_area.instance_id:
area_number = self.in_area.instance_id
else:
area_number = self.in_area.index
pathname = os.path.join(top_dir, "%d-%s" % (area_number, self.in_area.name), "npcs")
os.makedirs(pathname, 0o755, True)
filename = os.path.join(pathname, f"{number}-npc{settings.DATA_EXTN}")
comm.notify(f"Saving {filename}", merc.CONSOLE_INFO)
js = json.dumps(self, default=instance.to_json, indent=2, sort_keys=True)
md5 = hashlib.md5(js.encode("utf-8")).hexdigest()
if self._md5 != md5:
self._md5 = md5
with open(filename, "w") as fp:
fp.write(js)
if self.inventory:
for item_id in self.inventory[:]:
if item_id not in instance.items:
comm.notify(f"Item {item_id} is in NPC {self.instance_id}'s inventory, but does not exist?", merc.CONSOLE_ERROR)
continue
item = instance.items[item_id]
item.save(in_inventory=True, force=force)
for item_id in self.equipped.values():
if item_id:
if item_id not in instance.items:
comm.notify(f"Item {item_id} is in NPC {self.instance_id}'s equipment, but does not exist?", merc.CONSOLE_ERROR)
continue
item = instance.items[item_id]
item.save(is_equipped=True, force=force)
@classmethod
def load(cls, vnum: int = None, instance_id: int = None):
if instance_id:
if instance_id in instance.characters:
comm.notify(f"Instance {instance_id} of npc already loaded!", merc.CONSOLE_WARNING)
return
pathname = settings.INSTANCE_DIR
number = instance_id
elif vnum:
pathname = settings.AREA_DIR
number = vnum
else:
raise ValueError("To load an NPC, you must provide either a VNUM or an Instance_ID!")
target_file = "%d-item%s" % (number, settings.DATA_EXTN)
filename = None
for a_path, a_directory, i_files in os.walk(pathname):
if target_file in i_files:
filename = os.path.join(a_path, target_file)
break
if not filename:
raise ValueError("Cannot find %s" % target_file)
jso = ""
with open(filename, "r+") as f:
for line in f:
jso += line
obj = json.loads(jso, object_hook=instance.from_json)
if isinstance(obj, Npc):
# This just ensures that all items the player has are actually loaded.
if obj.inventory:
for item_id in obj.inventory[:]:
handler_item.Items.load(instance_id=item_id)
return obj
else:
comm.notify(f"Could not load npc data for {number}", merc.CONSOLE_INFO)
return None