craft-server-image/server-36-python.py [385:461]:
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        client.nick='player%d' % client.client_id
        self.send_nick(client)
        # TODO: has left message if was already authenticated
        self.send_talk('%s has joined the game.' % client.nick)
    def on_chunk(self, client, p, q, key=0):
        packets = []
        p, q, key = map(int, (p, q, key))
        query = (
            'select rowid, x, y, z, w from block where '
            'p = :p and q = :q and rowid > :key;'
        )
        rows = self.execute(query, dict(p=p, q=q, key=key))
        max_rowid = 0
        blocks = 0
        for rowid, x, y, z, w in rows:
            blocks += 1
            packets.append(packet(BLOCK, p, q, x, y, z, w))
            max_rowid = max(max_rowid, rowid)
        query = (
            'select x, y, z, w from light where '
            'p = :p and q = :q;'
        )
        rows = self.execute(query, dict(p=p, q=q))
        lights = 0
        for x, y, z, w in rows:
            lights += 1
            packets.append(packet(LIGHT, p, q, x, y, z, w))
        query = (
            'select x, y, z, face, text from sign where '
            'p = :p and q = :q;'
        )
        rows = self.execute(query, dict(p=p, q=q))
        signs = 0
        for x, y, z, face, text in rows:
            signs += 1
            packets.append(packet(SIGN, p, q, x, y, z, face, text))
        if blocks:
            packets.append(packet(KEY, p, q, max_rowid))
        if blocks or lights or signs:
            packets.append(packet(REDRAW, p, q))
        packets.append(packet(CHUNK, p, q))
        client.send_raw(''.join(packets))
    def on_block(self, client, x, y, z, w):
        x, y, z, w = map(int, (x, y, z, w))
        p, q = chunked(x), chunked(z)
        previous = self.get_block(x, y, z)
        message = None
        if AUTH_REQUIRED and client.user_id is None:
            message = 'Only logged in users are allowed to build.'
        elif y <= 0 or y > 255:
            message = 'Invalid block coordinates.'
        elif w not in ALLOWED_ITEMS:
            message = 'That item is not allowed.'
        elif w and previous:
            message = 'Cannot create blocks in a non-empty space.'
        elif not w and not previous:
            message = 'That space is already empty.'
        elif previous in INDESTRUCTIBLE_ITEMS:
            message = 'Cannot destroy that type of block.'
        if message is not None:
            client.send(BLOCK, p, q, x, y, z, previous)
            client.send(REDRAW, p, q)
            client.send(TALK, message)
            return
        query = (
            'insert into block_history (timestamp, user_id, x, y, z, w) '
            'values (:timestamp, :user_id, :x, :y, :z, :w);'
        )
        if RECORD_HISTORY:
            self.execute(query, dict(timestamp=time.time(),
                user_id=client.user_id, x=x, y=y, z=z, w=w))
        query = (
            'insert or replace into block (p, q, x, y, z, w) '
            'values (:p, :q, :x, :y, :z, :w);'
        )
        self.execute(query, dict(p=p, q=q, x=x, y=y, z=z, w=w))
        self.send_block(client, p, q, x, y, z, w)
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craft-server-image/serverold.py [504:580]:
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        client.nick='player%d' % client.client_id
        self.send_nick(client)
        # TODO: has left message if was already authenticated
        self.send_talk('%s has joined the game.' % client.nick)
    def on_chunk(self, client, p, q, key=0):
        packets = []
        p, q, key = map(int, (p, q, key))
        query = (
            'select rowid, x, y, z, w from block where '
            'p = :p and q = :q and rowid > :key;'
        )
        rows = self.execute(query, dict(p=p, q=q, key=key))
        max_rowid = 0
        blocks = 0
        for rowid, x, y, z, w in rows:
            blocks += 1
            packets.append(packet(BLOCK, p, q, x, y, z, w))
            max_rowid = max(max_rowid, rowid)
        query = (
            'select x, y, z, w from light where '
            'p = :p and q = :q;'
        )
        rows = self.execute(query, dict(p=p, q=q))
        lights = 0
        for x, y, z, w in rows:
            lights += 1
            packets.append(packet(LIGHT, p, q, x, y, z, w))
        query = (
            'select x, y, z, face, text from sign where '
            'p = :p and q = :q;'
        )
        rows = self.execute(query, dict(p=p, q=q))
        signs = 0
        for x, y, z, face, text in rows:
            signs += 1
            packets.append(packet(SIGN, p, q, x, y, z, face, text))
        if blocks:
            packets.append(packet(KEY, p, q, max_rowid))
        if blocks or lights or signs:
            packets.append(packet(REDRAW, p, q))
        packets.append(packet(CHUNK, p, q))
        client.send_raw(''.join(packets))
    def on_block(self, client, x, y, z, w):
        x, y, z, w = map(int, (x, y, z, w))
        p, q = chunked(x), chunked(z)
        previous = self.get_block(x, y, z)
        message = None
        if AUTH_REQUIRED and client.user_id is None:
            message = 'Only logged in users are allowed to build.'
        elif y <= 0 or y > 255:
            message = 'Invalid block coordinates.'
        elif w not in ALLOWED_ITEMS:
            message = 'That item is not allowed.'
        elif w and previous:
            message = 'Cannot create blocks in a non-empty space.'
        elif not w and not previous:
            message = 'That space is already empty.'
        elif previous in INDESTRUCTIBLE_ITEMS:
            message = 'Cannot destroy that type of block.'
        if message is not None:
            client.send(BLOCK, p, q, x, y, z, previous)
            client.send(REDRAW, p, q)
            client.send(TALK, message)
            return
        query = (
            'insert into block_history (timestamp, user_id, x, y, z, w) '
            'values (:timestamp, :user_id, :x, :y, :z, :w);'
        )
        if RECORD_HISTORY:
            self.execute(query, dict(timestamp=time.time(),
                user_id=client.user_id, x=x, y=y, z=z, w=w))
        query = (
            'insert or replace into block (p, q, x, y, z, w) '
            'values (:p, :q, :x, :y, :z, :w);'
        )
        self.execute(query, dict(p=p, q=q, x=x, y=y, z=z, w=w))
        self.send_block(client, p, q, x, y, z, w)
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