X-Git-Url: https://plomlompom.com/repos/berlin_corona.txt?a=blobdiff_plain;f=server_%2Fgame.py;h=bcf41b7ddeb10bd50f3283da04b76c898bb00c7a;hb=4fc1e457d1a4b4497334f3141a372d525d25bcfe;hp=e24b30aad2958df13fecebd9b10cce416289d686;hpb=523a3f079075159a16fa172ec99084c17e120044;p=plomrogue2-experiments

diff --git a/server_/game.py b/server_/game.py
index e24b30a..bcf41b7 100644
--- a/server_/game.py
+++ b/server_/game.py
@@ -1,34 +1,119 @@
+import sys
+sys.path.append('../')
+import game_common
+
+
 class GameError(Exception):
     pass
 
 
-def move_pos(direction, pos_yx):
-    if direction == 'UP':
-        pos_yx[0] -= 1
-    elif direction == 'DOWN':
-        pos_yx[0] += 1
-    elif direction == 'RIGHT':
-        pos_yx[1] += 1
-    elif direction == 'LEFT':
-        pos_yx[1] -= 1
+class Map(game_common.Map):
+
+    def __getitem__(self, yx):
+        return self.terrain[self.get_position_index(yx)]
+
+    def __setitem__(self, yx, c):
+        pos_i = self.get_position_index(yx)
+        self.terrain = self.terrain[:pos_i] + c + self.terrain[pos_i + 1:]
+
+    def __iter__(self):
+        """Iterate over YX position coordinates."""
+        for y in range(self.size[0]):
+            for x in range(self.size[1]):
+                yield [y, x]
+
+    def lines(self):
+        width = self.size[1]
+        for y in range(self.size[0]):
+            yield (y, self.terrain[y * width:(y + 1) * width])
+
+    # The following is used nowhere, so not implemented.
+    #def items(self):
+    #    for y in range(self.size[0]):
+    #        for x in range(self.size[1]):
+    #            yield ([y, x], self.terrain[self.get_position_index([y, x])])
+
+    @property
+    def size_i(self):
+        return self.size[0] * self.size[1]
+
+    def get_directions(self):
+        directions = []
+        for name in dir(self):
+            if name[:5] == 'move_':
+                directions += [name[5:]]
+        return directions
+
+    def new_from_shape(self, init_char):
+        return Map(self.size, init_char*self.size_i)
+
+    #def are_neighbors(self, pos_1, pos_2):
+    #    return abs(pos_1[0] - pos_2[0]) <= 1 and abs(pos_1[1] - pos_2[1] <= 1)
+
+    def are_neighbors(self, pos_1, pos_2):
+        if pos_1[0] == pos_2[0] and abs(pos_1[1] - pos_2[1]) <= 1:
+            return True
+        elif abs(pos_1[0] - pos_2[0]) == 1:
+            if pos_1[0] % 2 == 0:
+                if pos_2[1] in (pos_1[1], pos_1[1] - 1):
+                    return True
+            elif pos_2[1] in (pos_1[1], pos_1[1] + 1):
+                return True
+        return False
+
+    def move(self, start_pos, direction):
+        mover = getattr(self, 'move_' + direction)
+        new_pos = mover(start_pos)
+        if new_pos[0] < 0 or new_pos[1] < 0 or \
+                new_pos[0] >= self.size[0] or new_pos[1] >= self.size[1]:
+            raise GameError('would move outside map bounds')
+        return new_pos
+
+    def move_LEFT(self, start_pos):
+        return [start_pos[0], start_pos[1] - 1]
+
+    def move_RIGHT(self, start_pos):
+        return [start_pos[0], start_pos[1] + 1]
 
+    #def move_UP(self, start_pos):
+    #    return [start_pos[0] - 1, start_pos[1]]
 
-class World:
+    #def move_DOWN(self, start_pos):
+    #    return [start_pos[0] + 1, start_pos[1]]
+
+    def move_UPLEFT(self, start_pos):
+        if start_pos[0] % 2 == 0:
+            return [start_pos[0] - 1, start_pos[1] - 1]
+        else:
+            return [start_pos[0] - 1, start_pos[1]]
+
+    def move_UPRIGHT(self, start_pos):
+        if start_pos[0] % 2 == 0:
+            return [start_pos[0] - 1, start_pos[1]]
+        else:
+            return [start_pos[0] - 1, start_pos[1] + 1]
+
+    def move_DOWNLEFT(self, start_pos):
+        if start_pos[0] % 2 == 0:
+            return [start_pos[0] + 1, start_pos[1] - 1]
+        else:
+            return [start_pos[0] + 1, start_pos[1]]
+
+    def move_DOWNRIGHT(self, start_pos):
+        if start_pos[0] % 2 == 0:
+            return [start_pos[0] + 1, start_pos[1]]
+        else:
+            return [start_pos[0] + 1, start_pos[1] + 1]
+
+
+class World(game_common.World):
 
     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]
+        super().__init__()
+        self.Thing = Thing  # use local Thing class instead of game_common's
+        self.Map = Map # use local Map 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.
@@ -43,15 +128,21 @@ class World:
         the player's task is finished, the loop breaks.
         """
         while True:
-            for thing in self.things[self.player_i+1:]:
+            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[:self.player_i]:
+            for thing in self.things[:player_i]:
                 thing.proceed()
-            self.player.proceed(is_AI=False)
-            if self.player.task is None:
+            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={}):
@@ -59,7 +150,7 @@ class Task:
         self.thing = thing
         self.args = args
         self.kwargs = kwargs
-        self.todo = 1
+        self.todo = 3
 
     def check(self):
         if self.name == 'move':
@@ -67,31 +158,28 @@ class Task:
                 direction = self.args[0]
             else:
                 direction = self.kwargs['direction']
-            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]:
-                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]
-            if map_tile != '.':
+            test_pos = self.thing.world.map_.move(self.thing.position, direction)
+            if self.thing.world.map_[test_pos] != '.':
                 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)
+        self.position = self.world.map_.move(self.position, direction)
+        return 'success'
 
     def decide_task(self):
         if self.position[1] > 1:
@@ -101,21 +189,181 @@ class Thing:
         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
+        m = self.world.map_.new_from_shape('?')
+        for pos in m:
+            if pos == self.position or m.are_neighbors(pos, self.position):
+                m[pos] = '.'
+        self._stencil = m
+        return self._stencil
+
+    def get_visible_map(self):
+        stencil = self.get_stencil()
+        m = self.world.map_.new_from_shape(' ')
+        for pos in m:
+            if stencil[pos] == '.':
+                m[pos] = self.world.map_[pos]
+        return m
+
+    def get_visible_things(self):
+        stencil = self.get_stencil()
+        visible_things = []
+        for thing in self.world.things:
+            if stencil[thing.position] == '.':
+                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 Game(game_common.CommonCommandsMixin):
+
+    def __init__(self, game_file_name):
+        import server_.io
+        self.world = World()
+        self.io = server_.io.GameIO(game_file_name, self)
+        # 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_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.io.send('NEW_TURN ' + str(self.world.turn))
+        self.io.send('MAP ' + stringify_yx(self.world.map_.size))
+        visible_map = self.world.get_player().get_visible_map()
+        for y, line in visible_map.lines():
+            self.io.send('VISIBLE_MAP_LINE %5s %s' % (y, self.io.quote(line)))
+        visible_things = self.world.get_player().get_visible_things()
+        for thing in visible_things:
+            self.io.send('THING_TYPE %s %s' % (thing.id_, thing.type_))
+            self.io.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.io.send('TURN_FINISHED ' + str(self.world.turn))
+        self.world.proceed_to_next_player_turn()
+        msg = str(self.world.get_player().last_task_result)
+        self.io.send('LAST_PLAYER_TASK_RESULT ' + self.io.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.io.send('CALCULATING …', connection_id)
+        results = self.pool.map(fib, numbers)
+        reply = ' '.join([str(r) for r in results])
+        self.io.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.io.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."""
+        import parser
+        legal_directions = self.world.map_.get_directions()
+        if direction not in legal_directions:
+            raise parser.ArgError('Move argument must be one of: ' +
+                                  ', '.join(legal_directions))
+        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.io.send(msg, connection_id)
+    cmd_ECHO.argtypes = 'string'
+
+    def cmd_ALL(self, msg, connection_id):
+        """Send msg to all clients."""
+        self.io.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'