+import sys
+sys.path.append('../')
+import game_common
+import parser
+
+
class GameError(Exception):
pass
pos_yx[1] -= 1
+class Map(game_common.Map):
+
+ def get_line(self, y):
+ width = self.size[1]
+ return self.terrain[y * width:(y + 1) * width]
+
+
+class World(game_common.World):
+
+ def __init__(self):
+ super().__init__()
+ self.Thing = Thing # use local Thing class instead of game_common's
+ self.map_ = Map() # use extended child class
+ self.player_id = 0
+
+ def proceed_to_next_player_turn(self):
+ """Run game world turns until player can decide their next step.
+
+ 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.
+ """
+ while True:
+ player = self.get_player()
+ player_i = self.things.index(player)
+ for thing in self.things[player_i+1:]:
+ thing.proceed()
+ self.turn += 1
+ for thing in self.things[:player_i]:
+ thing.proceed()
+ player.proceed(is_AI=False)
+ if player.task is None:
+ break
+
+ def get_player(self):
+ return self.get_thing(self.player_id)
+
+
class Task:
def __init__(self, thing, name, args=(), kwargs={}):
self.thing = thing
self.args = args
self.kwargs = kwargs
- self.todo = 1
+ self.todo = 3
def check(self):
if self.name == 'move':
test_pos = self.thing.position[:]
move_pos(direction, test_pos)
if test_pos[0] < 0 or test_pos[1] < 0 or \
- test_pos[0] >= self.thing.world.map_size[0] or \
- test_pos[1] >= self.thing.world.map_size[1]:
+ test_pos[0] >= self.thing.world.map_.size[0] or \
+ test_pos[1] >= self.thing.world.map_.size[1]:
raise GameError('would move outside map bounds')
- pos_i = test_pos[0] * self.thing.world.map_size[1] + test_pos[1]
- map_tile = self.thing.world.map_[pos_i]
+ pos_i = test_pos[0] * self.thing.world.map_.size[1] + test_pos[1]
+ map_tile = self.thing.world.map_.terrain[pos_i]
if map_tile != '.':
raise GameError('would move into illegal terrain')
+ for t in self.thing.world.things:
+ if t.position == test_pos:
+ raise GameError('would move into other thing')
-class Thing:
+class Thing(game_common.Thing):
- def __init__(self, world, type_, position):
- self.world = world
- self.type_ = type_
- self.position = position
+ def __init__(self, *args, **kwargs):
+ super().__init__(*args, **kwargs)
self.task = Task(self, 'wait')
+ self.last_task_result = None
+ self._stencil = None
def task_wait(self):
- pass
+ return 'success'
def task_move(self, direction):
move_pos(direction, self.position)
+ return 'success'
def decide_task(self):
if self.position[1] > 1:
else:
self.set_task('wait')
- def set_task(self, task, *args, **kwargs):
- self.task = Task(self, task, args, kwargs)
+ def set_task(self, task_name, *args, **kwargs):
+ self.task = Task(self, task_name, args, kwargs)
self.task.check()
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.
+ 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.
+
+ Before doing anything, ensures an empty map visibility stencil
+ and checks that task is still possible, and aborts it
+ otherwise (for AI things, decides a new task).
+
"""
+ self._stencil = None
+ try:
+ self.task.check()
+ except GameError as e:
+ self.task = None
+ self.last_task_result = e
+ if is_AI:
+ self.decide_task()
+ return
self.task.todo -= 1
if self.task.todo <= 0:
task = getattr(self, 'task_' + self.task.name)
- task(*self.task.args, **self.task.kwargs)
+ self.last_task_result = task(*self.task.args, **self.task.kwargs)
self.task = None
if is_AI and self.task is None:
self.decide_task()
+ def get_stencil(self):
+ if self._stencil is not None:
+ return self._stencil
+ size = self.world.map_.size
+ m = Map(self.world.map_.size, '?'*size[0]*size[1])
+ y_me = self.position[0]
+ x_me = self.position[1]
+ for y in range(m.size[0]):
+ if y in (y_me - 1, y_me, y_me + 1):
+ for x in range(m.size[1]):
+ if x in (x_me - 1, x_me, x_me + 1):
+ pos = y * size[1] + x
+ m.terrain = m.terrain[:pos] + '.' + m.terrain[pos+1:]
+ self._stencil = m
+ return self._stencil
-class World:
+ def get_visible_map(self):
+ stencil = self.get_stencil()
+ size = self.world.map_.size
+ size_i = self.world.map_.size[0] * self.world.map_.size[1]
+ m = Map(size, ' '*size_i)
+ for i in range(size_i):
+ if stencil.terrain[i] == '.':
+ c = self.world.map_.terrain[i]
+ m.terrain = m.terrain[:i] + c + m.terrain[i+1:]
+ return m
- def __init__(self):
- self.turn = 0
- self.map_size = (5, 5)
- self.map_ = 'xxxxx' +\
- 'x...x' +\
- 'x.X.x' +\
- 'x...x' +\
- 'xxxxx'
- self.things = [
- Thing(self, 'human', [3, 3]),
- Thing(self, 'monster', [1, 1])
- ]
- self.player_i = 0
- self.player = self.things[self.player_i]
+ def get_visible_things(self):
+ stencil = self.get_stencil()
+ visible_things = []
+ for thing in self.world.things:
+ width = self.world.map_.size[1]
+ pos_i = thing.position[0] * width + thing.position[1]
+ if stencil.terrain[pos_i] == '.':
+ visible_things += [thing]
+ return visible_things
+
+
+def fib(n):
+ """Calculate n-th Fibonacci number. Very inefficiently."""
+ if n in (1, 2):
+ return 1
+ else:
+ return fib(n-1) + fib(n-2)
+
+
+class CommandHandler(game_common.Commander):
+
+ def __init__(self, game_file_name):
+ self.queues_out = {}
+ self.world = World()
+ self.parser = parser.Parser(self)
+ self.game_file_name = game_file_name
+ # self.pool and self.pool_result are currently only needed by the FIB
+ # command and the demo of a parallelized game loop in cmd_inc_p.
+ from multiprocessing import Pool
+ self.pool = Pool()
+ self.pool_result = None
+
+ def send(self, msg, connection_id=None):
+ """Send message msg to server's client(s) via self.queues_out.
+
+ If a specific client is identified by connection_id, only
+ sends msg to that one. Else, sends it to all clients
+ identified in self.queues_out.
+
+ """
+ if connection_id:
+ self.queues_out[connection_id].put(msg)
+ else:
+ for connection_id in self.queues_out:
+ self.queues_out[connection_id].put(msg)
+
+ def handle_input(self, input_, connection_id=None, store=True):
+ """Process input_ to command grammar, call command handler if found."""
+ from inspect import signature
+
+ def answer(connection_id, msg):
+ if connection_id:
+ self.send(msg, connection_id)
+ else:
+ print(msg)
+
+ try:
+ command = self.parser.parse(input_)
+ if command is None:
+ answer(connection_id, 'UNHANDLED_INPUT')
+ else:
+ if 'connection_id' in list(signature(command).parameters):
+ command(connection_id=connection_id)
+ else:
+ command()
+ if store:
+ with open(self.game_file_name, 'a') as f:
+ f.write(input_ + '\n')
+ except parser.ArgError as e:
+ answer(connection_id, 'ARGUMENT_ERROR ' + self.quote(str(e)))
+ except game.GameError as e:
+ answer(connection_id, 'GAME_ERROR ' + self.quote(str(e)))
+
+ def quote(self, string):
+ """Quote & escape string so client interprets it as single token."""
+ quoted = []
+ quoted += ['"']
+ for c in string:
+ if c in {'"', '\\'}:
+ quoted += ['\\']
+ quoted += [c]
+ quoted += ['"']
+ return ''.join(quoted)
+
+ def send_gamestate(self, connection_id=None):
+ """Send out game state data relevant to clients."""
+
+ def stringify_yx(tuple_):
+ """Transform tuple (y,x) into string 'Y:'+str(y)+',X:'+str(x)."""
+ return 'Y:' + str(tuple_[0]) + ',X:' + str(tuple_[1])
+
+ self.send('NEW_TURN ' + str(self.world.turn))
+ self.send('MAP_SIZE ' + stringify_yx(self.world.map_.size))
+ visible_map = self.world.get_player().get_visible_map()
+ for y in range(self.world.map_.size[0]):
+ self.send('VISIBLE_MAP_LINE %5s %s' %
+ (y, self.quote(visible_map.get_line(y))))
+ visible_things = self.world.get_player().get_visible_things()
+ for thing in visible_things:
+ self.send('THING_TYPE %s %s' % (thing.id_, thing.type_))
+ self.send('THING_POS %s %s' % (thing.id_,
+ 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('TURN_FINISHED ' + str(self.world.turn))
+ self.world.proceed_to_next_player_turn()
+ msg = str(self.world.get_player().last_task_result)
+ self.send('LAST_PLAYER_TASK_RESULT ' + self.quote(msg))
+ self.send_gamestate()
+
+ def cmd_FIB(self, numbers, connection_id):
+ """Reply with n-th Fibonacci numbers, n taken from tokens[1:].
+
+ Numbers are calculated in parallel as far as possible, using fib().
+ A 'CALCULATING …' message is sent to caller before the result.
+ """
+ self.send('CALCULATING …', connection_id)
+ results = self.pool.map(fib, numbers)
+ reply = ' '.join([str(r) for r in results])
+ self.send(reply, connection_id)
+ cmd_FIB.argtypes = 'seq:int:nonneg'
+
+ def cmd_INC_P(self, connection_id):
+ """Increment world.turn, send game turn data to everyone.
+
+ To simulate game processing waiting times, a one second delay between
+ TURN_FINISHED and NEW_TURN occurs; after NEW_TURN, some expensive
+ calculations are started as pool processes that need to be finished
+ until a further INC finishes the turn.
+
+ This is just a demo structure for how the game loop could work when
+ parallelized. One might imagine a two-step game turn, with a non-action
+ step determining actor tasks (the AI determinations would take the
+ place of the fib calculations here), and an action step wherein these
+ tasks are performed (where now sleep(1) is).
+ """
+ from time import sleep
+ if self.pool_result is not None:
+ self.pool_result.wait()
+ self.send('TURN_FINISHED ' + str(self.world.turn))
+ sleep(1)
+ self.world.turn += 1
+ self.send_gamestate()
+ self.pool_result = self.pool.map_async(fib, (35, 35))
+
+ 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 parser.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_GET_GAMESTATE(self, connection_id):
+ """Send game state jto caller."""
+ self.send_gamestate(connection_id)
+
+ def cmd_ECHO(self, msg, connection_id):
+ """Send msg to caller."""
+ self.send(msg, connection_id)
+ cmd_ECHO.argtypes = 'string'
+
+ def cmd_ALL(self, msg, connection_id):
+ """Send msg to all clients."""
+ self.send(msg)
+ cmd_ALL.argtypes = 'string'
+
+ def cmd_TERRAIN_LINE(self, y, terrain_line):
+ self.world.map_.set_line(y, terrain_line)
+ cmd_TERRAIN_LINE.argtypes = 'int:nonneg string'
projects / plomrogue2-experiments / blobdiff