import socketserver
import threading
import queue
+import sys
+import os
from parser import ArgError, Parser
+from server_.game import World, GameError
# Avoid "Address already in use" errors.
self.request.close()
-class Task:
-
- def __init__(self, name, args=(), kwargs={}):
- self.name = name
- self.args = args
- self.kwargs = kwargs
- self.todo = 1
-
-
-class Thing:
-
- def __init__(self, type_, position):
- self.type = type_
- self.position = position
- self.task = Task('wait')
-
- def task_wait(self):
- pass
-
- def task_move(self, direction):
- if direction == 'UP':
- self.position[0] -= 1
- elif direction == 'DOWN':
- self.position[0] += 1
- elif direction == 'RIGHT':
- self.position[1] += 1
- elif direction == 'LEFT':
- self.position[1] -= 1
-
- def decide_task(self):
- if self.position[1] > 1:
- self.set_task('move', 'LEFT')
- elif self.position[1] < 3:
- self.set_task('move', 'RIGHT')
- else:
- self.set_task('wait')
-
- def set_task(self, task, *args, **kwargs):
- self.task = Task(task, args, kwargs)
-
- def proceed(self, is_AI=True):
- """Further the thing in its tasks.
-
- Decrements .task.todo; if it thus falls to <= 0, enacts method whose
- name is 'task_' + self.task.name and sets .task = None. If is_AI, calls
- .decide_task to decide a self.task.
- """
- self.task.todo -= 1
- if self.task.todo <= 0:
- task = getattr(self, 'task_' + self.task.name)
- task(*self.task.args, **self.task.kwargs)
- self.task = None
- if is_AI and self.task is None:
- self.decide_task()
-
-
-class World:
-
- def __init__(self):
- self.turn = 0
- self.map_size = (5, 5)
- self.map_ = 'xxxxx\n' +\
- 'x...x\n' +\
- 'x.X.x\n' +\
- 'x...x\n' +\
- 'xxxxx'
- self.things = [Thing('human', [3, 3]), Thing('monster', [1, 1])]
- self.player_i = 0
- self.player = self.things[self.player_i]
-
-
def fib(n):
"""Calculate n-th Fibonacci number. Very inefficiently."""
if n in (1, 2):
class CommandHandler:
- def __init__(self, queues_out):
+ def __init__(self):
from multiprocessing import Pool
- self.queues_out = queues_out
+ self.queues_out = {}
self.world = World()
self.parser = Parser(self)
# self.pool and self.pool_result are currently only needed by the FIB
self.pool = Pool()
self.pool_result = None
+ def handle_input(self, input_, connection_id=None, abort_on_error=False):
+ """Process input_ to command grammar, call command handler if found."""
+ from inspect import signature
+ try:
+ command = self.parser.parse(input_)
+ if command is None:
+ self.send_to(connection_id, 'UNHANDLED INPUT')
+ else:
+ if 'connection_id' in list(signature(command).parameters):
+ command(connection_id=connection_id)
+ else:
+ command()
+ except ArgError as e:
+ self.send_to(connection_id, 'ARGUMENT ERROR: ' + str(e))
+ if abort_on_error:
+ exit(1)
+ except GameError as e:
+ self.send_to(connection_id, 'GAME ERROR: ' + str(e))
+ if abort_on_error:
+ exit(1)
+
def send_to(self, connection_id, msg):
- """Send msg to client of connection_id."""
- self.queues_out[connection_id].put(msg)
+ """Send msg to client of connection_id; if no later, print instead."""
+ if connection_id:
+ self.queues_out[connection_id].put(msg)
+ else:
+ print(msg)
def send_all(self, msg):
"""Send msg to all clients."""
"""Send out game state data relevant to clients."""
self.send_all('NEW_TURN ' + str(self.world.turn))
self.send_all('MAP_SIZE ' + self.stringify_yx(self.world.map_size))
- self.send_all('TERRAIN\n' + self.quoted(self.world.map_))
+ for y in range(self.world.map_size[0]):
+ width = self.world.map_size[1]
+ terrain_line = self.world.terrain_map[y * width:(y + 1) * width]
+ self.send_all('TERRAIN_LINE %5s %s' % (y, self.quoted(terrain_line)))
for thing in self.world.things:
- self.send_all('THING TYPE:' + thing.type + ' '
- + self.stringify_yx(thing.position))
-
- def proceed_to_next_player_turn(self, connection_id):
- """Run game world turns until player can decide their next step.
-
- Sends a 'TURN_FINISHED' message, then iterates through all non-player
- things, on each step furthering them in their tasks (and letting them
- decide new ones if they finish). The iteration order is: first all
- things that come after the player in the world things list, then (after
- incrementing the world turn) all that come before the player; then the
- player's .proceed() is run, and if it does not finish his task, the
- loop starts at the beginning. Once the player's task is finished, the
- loop breaks, and client-relevant game data is sent.
+ self.send_all('THING_TYPE %s %s' % (thing.id_, thing.type_))
+ self.send_all('THING_POS %s %s' % (thing.id_, self.stringify_yx(thing.position)))
+
+ def proceed(self):
+ """Send turn finish signal, run game world, send new world data.
+
+ First sends 'TURN_FINISHED' message, then runs game world
+ until new player input is needed, then sends game state.
"""
self.send_all('TURN_FINISHED ' + str(self.world.turn))
- while True:
- for thing in self.world.things[self.world.player_i+1:]:
- thing.proceed()
- self.world.turn += 1
- for thing in self.world.things[:self.world.player_i]:
- thing.proceed()
- self.world.player.proceed(is_AI=False)
- if self.world.player.task is None:
- break
+ self.world.proceed_to_next_player_turn()
self.send_all_gamestate()
+ def cmd_MOVE(self, direction):
+ """Set player task to 'move' with direction arg, finish player turn."""
+ if direction not in {'UP', 'DOWN', 'RIGHT', 'LEFT'}:
+ raise ArgError('Move argument must be one of: '
+ 'UP, DOWN, RIGHT, LEFT')
+ self.world.get_player().set_task('move', direction=direction)
+ self.proceed()
+ cmd_MOVE.argtypes = 'string'
+
+ def cmd_WAIT(self):
+ """Set player task to 'wait', finish player turn."""
+ self.world.get_player().set_task('wait')
+ self.proceed()
+
+ def cmd_MAP_SIZE(self, yx):
+ self.world.set_map_size(yx)
+ cmd_MAP_SIZE.argtypes = 'yx_tuple:nonneg'
+
+ def cmd_TERRAIN_LINE(self, y, line):
+ self.world.set_map_line(y, line)
+ cmd_TERRAIN_LINE.argtypes = 'int:nonneg string'
+
+ def cmd_THING_TYPE(self, i, type_):
+ t = self.world.get_thing(i)
+ t.type_ = type_
+ cmd_THING_TYPE.argtypes = 'int:nonneg string'
+
+ def cmd_THING_POS(self, i, yx):
+ t = self.world.get_thing(i)
+ t.position = list(yx)
+ cmd_THING_POS.argtypes = 'int:nonneg yx_tuple:nonneg'
+
+ def cmd_GET_TURN(self, connection_id):
+ """Send world.turn to caller."""
+ self.send_to(connection_id, str(self.world.turn))
+
+ def cmd_ECHO(self, msg, connection_id):
+ """Send msg to caller."""
+ self.send_to(connection_id, msg)
+ cmd_ECHO.argtypes = 'string'
+
+ def cmd_ALL(self, msg, connection_id):
+ """Send msg to all clients."""
+ self.send_all(msg)
+ cmd_ALL.argtypes = 'string'
+
def cmd_FIB(self, numbers, connection_id):
"""Reply with n-th Fibonacci numbers, n taken from tokens[1:].
self.send_all_gamestate()
self.pool_result = self.pool.map_async(fib, (35, 35))
- def cmd_GET_TURN(self, connection_id):
- """Send world.turn to caller."""
- self.send_to(connection_id, str(self.world.turn))
- def cmd_MOVE(self, direction, connection_id):
- """Set player task to 'move' with direction arg, finish player turn."""
- if direction not in {'UP', 'DOWN', 'RIGHT', 'LEFT'}:
- raise ArgError('Move argument must be one of: '
- 'UP, DOWN, RIGHT, LEFT')
- self.world.player.set_task('move', direction=direction)
- self.proceed_to_next_player_turn(connection_id)
- cmd_MOVE.argtypes = 'string'
-
- def cmd_WAIT(self, connection_id):
- """Set player task to 'wait', finish player turn."""
- self.world.player.set_task('wait')
- self.proceed_to_next_player_turn(connection_id)
-
- def cmd_ECHO(self, msg, connection_id):
- """Send msg to caller."""
- self.send_to(connection_id, msg)
- cmd_ECHO.argtypes = 'string'
-
- def cmd_ALL(self, msg, connection_id):
- """Send msg to all clients."""
- self.send_all(msg)
- cmd_ALL.argtypes = 'string'
-
- def handle_input(self, input_, connection_id):
- """Process input_ to command grammar, call command handler if found."""
- try:
- command = self.parser.parse(input_)
- if command is None:
- self.send_to(connection_id, 'UNHANDLED INPUT')
- else:
- command(connection_id=connection_id)
- except ArgError as e:
- self.send_to(connection_id, 'ARGUMENT ERROR: ' + str(e))
-
-
-def io_loop(q):
+def io_loop(q, commander):
"""Handle commands coming through queue q, send results back.
Commands from q are expected to be tuples, with the first element either
which to send replies.
A 'COMMAND' command is specified in greater detail by a string that is the
- tuple's third element. CommandHandler takes care of processing this and
- sending out replies.
+ tuple's third element. The commander CommandHandler takes care of processing
+ this and sending out replies.
"""
- queues_out = {}
- command_handler = CommandHandler(queues_out)
while True:
x = q.get()
command_type = x[0]
connection_id = x[1]
content = None if len(x) == 2 else x[2]
if command_type == 'ADD_QUEUE':
- queues_out[connection_id] = content
+ commander.queues_out[connection_id] = content
elif command_type == 'COMMAND':
- command_handler.handle_input(content, connection_id)
+ commander.handle_input(content, connection_id)
elif command_type == 'KILL_QUEUE':
- del queues_out[connection_id]
+ del commander.queues_out[connection_id]
+if len(sys.argv) != 2:
+ print('wrong number of arguments, expected one (game file)')
+ exit(1)
+game_file_name = sys.argv[1]
+commander = CommandHandler()
+if os.path.exists(game_file_name):
+ if not os.path.isfile(game_file_name):
+ print('game file name does not refer to a valid game file')
+ else:
+ with open(game_file_name, 'r') as f:
+ lines = f.readlines()
+ for i in range(len(lines)):
+ line = lines[i]
+ print("FILE INPUT LINE %s: %s" % (i, line), end='')
+ commander.handle_input(line, abort_on_error=True)
+else:
+ commander.handle_input('MAP_SIZE Y:5,X:5')
+ commander.handle_input('TERRAIN_LINE 0 "xxxxx"')
+ commander.handle_input('TERRAIN_LINE 1 "x...x"')
+ commander.handle_input('TERRAIN_LINE 2 "x.X.x"')
+ commander.handle_input('TERRAIN_LINE 3 "x...x"')
+ commander.handle_input('TERRAIN_LINE 4 "xxxxx"')
+ commander.handle_input('THING_TYPE 0 human')
+ commander.handle_input('THING_POS 0 Y:3,X:3')
+ commander.handle_input('THING_TYPE 1 monster')
+ commander.handle_input('THING_POS 1 Y:1,X:1')
q = queue.Queue()
-c = threading.Thread(target=io_loop, daemon=True, args=(q,))
+c = threading.Thread(target=io_loop, daemon=True, args=(q, commander))
c.start()
server = Server(q, ('localhost', 5000), IO_Handler)
try: