mce.py

#!/usr/bin/env python
import mclevelbase
import mclevel
import materials
import infiniteworld
import sys
import os
from box import BoundingBox, Vector
import numpy
from numpy import zeros, bincount
import logging
import itertools
import traceback
import shlex
import codecs

from math import floor
# TODO: Why is this needed?
try:
    import readline  # if available, used by raw_input()
except:
    pass


class UsageError(RuntimeError):
    pass


class BlockMatchError(RuntimeError):
    pass


class PlayerNotFound(RuntimeError):
    pass


class mce(object):
    '''
    Block commands:
       {commandPrefix}clone <sourceBox> <destPoint> [noair] [nowater]
       {commandPrefix}fill <blockType> [ <box> ]
       {commandPrefix}replace <blockType> [with] <newBlockType> [ <box> ]

       {commandPrefix}export <filename> <sourceBox>
       {commandPrefix}import <filename> <destPoint> [noair] [nowater]

       {commandPrefix}createChest <point> <item> [ <count> ]
       {commandPrefix}analyze

    Player commands:
       {commandPrefix}player [ <player> [ <point> ] ]
       {commandPrefix}spawn [ <point> ]

    Entity commands:
       {commandPrefix}removeEntities [ <EntityID> ]
       {commandPrefix}dumpSigns [ <filename> ]
       {commandPrefix}dumpChests [ <filename> ]

    Chunk commands:
       {commandPrefix}createChunks <box>
       {commandPrefix}deleteChunks <box>
       {commandPrefix}prune <box>
       {commandPrefix}relight [ <box> ]

    World commands:
       {commandPrefix}create <filename>
       {commandPrefix}dimension [ <dim> ]
       {commandPrefix}degrief
       {commandPrefix}time [ <time> ]
       {commandPrefix}worldsize
       {commandPrefix}heightmap <filename>
       {commandPrefix}randomseed [ <seed> ]
       {commandPrefix}gametype [ <player> [ <gametype> ] ]

    Editor commands:
       {commandPrefix}save
       {commandPrefix}reload
       {commandPrefix}load <filename> | <world number>
       {commandPrefix}execute <filename>
       {commandPrefix}quit

    Informational:
       {commandPrefix}blocks [ <block name> | <block ID> ]
       {commandPrefix}help [ <command> ]

    **IMPORTANT**
       {commandPrefix}box

       Type 'box' to learn how to specify points and areas.

    '''
    random_seed = os.getenv('MCE_RANDOM_SEED', None)
    last_played = os.getenv('MCE_LAST_PLAYED', None)

    def commandUsage(self, command):
        ' returns usage info for the named command - just give the docstring for the handler func '
        func = getattr(self, '_' + command)
        return func.__doc__

    commands = [
        'clone',
        'fill',
        'replace',

        'export',
        'execute',
        'import',

        'createchest',

        'player',
        'spawn',

        'removeentities',
        'dumpsigns',
        'dumpchests',

        'createchunks',
        'deletechunks',
        'prune',
        'relight',

        'create',
        'degrief',
        'time',
        'worldsize',
        'heightmap',
        'randomseed',
        'gametype',

        'save',
        'load',
        'reload',
        'dimension',
        'repair',

        'quit',
        'exit',

        'help',
        'blocks',
        'analyze',
        'region',

        'debug',
        'log',
        'box',
    ]
    debug = False
    needsSave = False

    def readInt(self, command):
        try:
            val = int(command.pop(0))
        except ValueError:
            raise UsageError('Cannot understand numeric input')
        return val

    def prettySplit(self, command):
        cmdstring = ' '.join(command)

        lex = shlex.shlex(cmdstring)
        lex.whitespace_split = True
        lex.whitespace += '(),'

        command[:] = list(lex)

    def readBox(self, command):
        self.prettySplit(command)

        sourcePoint = self.readIntPoint(command)
        if command[0].lower() == 'to':
            command.pop(0)
            sourcePoint2 = self.readIntPoint(command)
            sourceSize = sourcePoint2 - sourcePoint
        else:
            sourceSize = self.readIntPoint(command, isPoint=False)
        if len([p for p in sourceSize if p <= 0]):
            raise UsageError('Box size cannot be zero or negative')
        box = BoundingBox(sourcePoint, sourceSize)
        return box

    def readIntPoint(self, command, isPoint=True):
        point = self.readPoint(command, isPoint)
        point = [int(floor(x)) for x in point]
        return Vector(*point)

    def readPoint(self, command, isPoint=True):
        self.prettySplit(command)
        try:
            word = command.pop(0)
            if isPoint and (word in self.level.players):
                x, y, z = self.level.getPlayerPosition(word)
                if len(command) and command[0].lower() == 'delta':
                    command.pop(0)
                    try:
                        x += int(command.pop(0))
                        y += int(command.pop(0))
                        z += int(command.pop(0))

                    except ValueError:
                        raise UsageError('Error decoding point input (expected a number).')
                return x, y, z

        except IndexError:
            raise UsageError('Error decoding point input (expected more values).')

        try:
            try:
                x = float(word)
            except ValueError:
                if isPoint:
                    raise PlayerNotFound(word)
                raise
            y = float(command.pop(0))
            z = float(command.pop(0))
        except ValueError:
            raise UsageError('Error decoding point input (expected a number).')
        except IndexError:
            raise UsageError('Error decoding point input (expected more values).')

        return x, y, z

    def readBlockInfo(self, command):
        keyword = command.pop(0)

        matches = self.level.materials.blocksMatching(keyword)
        blockInfo = None

        if len(matches):
            if len(matches) == 1:
                blockInfo = matches[0]

            # eat up more words that possibly specify a block.  stop eating when 0 matching blocks.
            while len(command):
                newMatches = self.level.materials.blocksMatching(keyword + ' ' + command[0])

                if len(newMatches) == 1:
                    blockInfo = newMatches[0]
                if len(newMatches) > 0:
                    matches = newMatches
                    keyword = keyword + ' ' + command.pop(0)
                else:
                    break

        else:
            try:
                data = 0
                if ':' in keyword:
                    blockID, data = [int(x) for x in keyword.split(':')]
                else:
                    blockID = int(keyword)
                blockInfo = self.level.materials.blockWithID(blockID, data)

            except ValueError:
                blockInfo = None

        if blockInfo is None:
                print('Ambiguous block specifier: ', keyword)
                if len(matches):
                    print('Matches: ')
                    for m in matches:
                        if m == self.level.materials.defaultName:
                            continue
                        print('{0:3}:{1:<2} : {2}'.format(m.ID, m.blockData, m.name))
                else:
                    print('No blocks matched.')
                raise BlockMatchError

        return blockInfo

    # TODO: can I rewrite this so that it returns an iterator instead of a list for efficient memory usage?
    def readBlocksToCopy(self, command):
        blocksToCopy = list(range(materials.id_limit))
        while len(command):
            word = command.pop()
            if word == 'noair':
                blocksToCopy.remove(0)
            if word == 'nowater':
                blocksToCopy.remove(8)
                blocksToCopy.remove(9)

        return blocksToCopy

    def _box(self, command):
        '''
        Boxes:

    Many commands require a <box> as arguments. A box can be specified with
    a point and a size:
        (12, 5, 15), (5, 5, 5)

    or with two points, making sure to put the keyword 'to' between them:
        (12, 5, 15) to (17, 10, 20)

    The commas and parentheses are not important.
    You may add them for improved readability.


        Points:

    Points and sizes are triplets of numbers ordered X Y Z.
    X is position north-south, increasing southward.
    Y is position up-down, increasing upward.
    Z is position east-west, increasing westward.


        Players:

    A player's name can be used as a point - it will use the
    position of the player's head. Use the keyword 'delta' after
    the name to specify a point near the player.

    Example:
       codewarrior delta 0 5 0

    This refers to a point 5 blocks above codewarrior's head.

    '''
        raise UsageError

    def _debug(self, command):
        self.debug = not self.debug
        print('Debug', ('disabled', 'enabled')[self.debug])

    def _log(self, command):
        '''
    log [ <number> ]

    Get or set the log threshold. 0 logs everything; 50 only logs major errors.
    '''
        if len(command):
            try:
                logging.getLogger().level = int(command[0])
            except ValueError:
                raise UsageError('Cannot understand numeric input.')
        else:
            print('Log level: {0}'.format(logging.getLogger().level))

    def _clone(self, command):
        '''
    clone <sourceBox> <destPoint> [noair] [nowater]

    Clone blocks in a cuboid starting at sourcePoint and extending for
    sourceSize blocks in each direction. Blocks and entities in the area
    are cloned at destPoint.
    '''
        if len(command) == 0:
            self.printUsage('clone')
            return

        box = self.readBox(command)

        destPoint = self.readPoint(command)

        destPoint = [int(floor(x)) for x in destPoint]
        blocksToCopy = self.readBlocksToCopy(command)

        tempSchematic = self.level.extractSchematic(box)
        self.level.copyBlocksFrom(tempSchematic, BoundingBox((0, 0, 0), box.origin), destPoint, blocksToCopy)

        self.needsSave = True
        print('Cloned 0 blocks.')

    def _fill(self, command):
        '''
    fill <blockType> [ <box> ]

    Fill blocks with blockType in a cuboid starting at point and
    extending for size blocks in each direction. Without a
    destination, fills the whole world. blockType and may be a
    number from 0-255 or a name listed by the 'blocks' command.
    '''
        if len(command) == 0:
            self.printUsage('fill')
            return

        blockInfo = self.readBlockInfo(command)

        if len(command):
            box = self.readBox(command)
        else:
            box = None

        print('Filling with {0}'.format(blockInfo.name))

        self.level.fillBlocks(box, blockInfo)

        self.needsSave = True
        print('Filled {0} blocks.'.format('all' if box is None else box.volume))

    def _replace(self, command):
        '''
    replace <blockType> [with] <newBlockType> [ <box> ]

    Replace all blockType blocks with newBlockType in a cuboid
    starting at point and extending for size blocks in
    each direction. Without a destination, replaces blocks over
    the whole world. blockType and newBlockType may be numbers
    from 0-255 or names listed by the 'blocks' command.
    '''
        if len(command) == 0:
            self.printUsage('replace')
            return

        blockInfo = self.readBlockInfo(command)

        if command[0].lower() == 'with':
            command.pop(0)
        newBlockInfo = self.readBlockInfo(command)

        if len(command):
            box = self.readBox(command)
        else:
            box = None

        print('Replacing {0} with {1}'.format(blockInfo.name, newBlockInfo.name))

        self.level.fillBlocks(box, newBlockInfo, blocksToReplace=[blockInfo])

        self.needsSave = True
        print('Done.')

    def _createchest(self, command):
        '''
    createChest <point> <item> [ <count> ]

    Create a chest filled with the specified item.
    Stacks are 64 if count is not given.
    '''
        point = [int(floor(float(x))) for x in self.readPoint(command)]
        itemID = self.readInt(command)
        count = 64
        if len(command):
            count = self.readInt(command)

        chest = mclevel.MCSchematic.chestWithItemID(itemID, count)
        self.level.copyBlocksFrom(chest, chest.bounds, point)
        self.needsSave = True

    def _analyze(self, command):
        '''
        analyze

        Counts all of the block types in every chunk of the world.
        '''
        blockCounts = zeros((65536,), 'uint64')
        sizeOnDisk = 0

        print('Analyzing {0} chunks...'.format(self.level.chunkCount))
        # for input to bincount, create an array of uint16s by
        # shifting the data left and adding the blocks

        for i, cPos in enumerate(self.level.allChunks, 1):
            ch = self.level.getChunk(*cPos)
            btypes = numpy.array(ch.Data.ravel(), dtype='uint16')
            btypes <<= 12
            btypes += ch.Blocks.ravel()
            counts = bincount(btypes)

            blockCounts[:counts.shape[0]] += counts
            if i % 100 == 0:
                logging.info('Chunk {0}...'.format(i))

        for blockID in range(materials.id_limit):
            block = self.level.materials.blockWithID(blockID, 0)
            if block.hasVariants:
                for data in range(16):
                    i = (data << 12) + blockID
                    if blockCounts[i]:
                        idstring = '({id}:{data})'.format(id=blockID, data=data)

                        print('{idstring:9} {name:30}: {count:<10}'.format(
                            idstring=idstring, name=self.level.materials.blockWithID(blockID, data).name, count=blockCounts[i]))

            else:
                count = int(sum(blockCounts[(d << 12) + blockID] for d in range(16)))
                if count:
                    idstring = '({id})'.format(id=blockID)
                    print('{idstring:9} {name:30}: {count:<10}'.format(
                          idstring=idstring, name=self.level.materials.blockWithID(blockID, 0).name, count=count))

        self.needsSave = True

    def _export(self, command):
        '''
    export <filename> <sourceBox>

    Exports blocks in the specified region to a file in schematic format.
    This file can be imported with mce or MCEdit.
    '''
        if len(command) == 0:
            self.printUsage('export')
            return

        filename = command.pop(0)
        box = self.readBox(command)

        tempSchematic = self.level.extractSchematic(box)

        tempSchematic.saveToFile(filename)

        print('Exported {0} blocks.'.format(tempSchematic.bounds.volume))

    def _import(self, command):
        '''
    import <filename> <destPoint> [noair] [nowater]

    Imports a level or schematic into this world, beginning at destPoint.
    Supported formats include
    - Alpha single or multiplayer world folder containing level.dat,
    - Zipfile containing Alpha world folder,
    - Classic single-player .mine,
    - Classic multiplayer server_level.dat,
    - Indev .mclevel
    - Schematic from RedstoneSim, MCEdit, mce
    - .inv from INVEdit (appears as a chest)
    '''
        if len(command) == 0:
            self.printUsage('import')
            return

        filename = command.pop(0)
        destPoint = self.readPoint(command)
        blocksToCopy = self.readBlocksToCopy(command)

        importLevel = mclevel.fromFile(filename)

        self.level.copyBlocksFrom(importLevel, importLevel.bounds, destPoint, blocksToCopy, create=True)

        self.needsSave = True
        print('Imported {0} blocks.'.format(importLevel.bounds.volume))

    def _player(self, command):
        '''
    player [ <player> [ <point> ] ]

    Move the named player to the specified point.
    Without a point, prints the named player's position.
    Without a player, prints all players and positions.

    In a single-player world, the player is named Player.
    '''
        if len(command) == 0:
            print('Players: ')
            for player in self.level.players:
                print('    {0}: {1}'.format(player, self.level.getPlayerPosition(player)))
            return

        player = command.pop(0)
        if len(command) == 0:
            print('Player {0}: {1}'.format(player, self.level.getPlayerPosition(player)))
            return

        point = self.readPoint(command)
        self.level.setPlayerPosition(point, player)

        self.needsSave = True
        print('Moved player {0} to {1}'.format(player, point))

    def _spawn(self, command):
        '''
    spawn [ <point> ]

    Move the world's spawn point.
    Without a point, prints the world's spawn point.
    '''
        if len(command):
            point = self.readPoint(command)
            point = [int(floor(x)) for x in point]

            self.level.setPlayerSpawnPosition(point)

            self.needsSave = True
            print('Moved spawn point to ', point)
        else:
            print('Spawn point: ', self.level.playerSpawnPosition())

    def _dumpsigns(self, command):
        '''
    dumpSigns [ <filename> ]

    Saves the text and location of every sign in the world to a text file.
    With no filename, saves signs to <worldname>.signs

    Output is newline-delimited. 5 lines per sign. Coordinates are
    on the first line, followed by four lines of sign text. For example:

        [229, 118, -15]
        'To boldly go
        where no man
        has gone
        before.'

    Coordinates are ordered the same as point inputs:
        [North/South, Down/Up, East/West]

    '''
        if len(command):
            filename = command[0]
        else:
            filename = self.level.displayName + '.signs'

        # We happen to encode the output file in UTF-8 too, although
        # we could use another UTF encoding.  The '-sig' encoding puts
        # a signature at the start of the output file that tools such
        # as Microsoft Windows Notepad and Emacs understand to mean
        # the file has UTF-8 encoding.
        outFile = codecs.open(filename, 'w', encoding='utf-8-sig')

        print('Dumping signs...')
        signCount = 0

        for i, cPos in enumerate(self.level.allChunks):
            try:
                chunk = self.level.getChunk(*cPos)
            except mclevelbase.ChunkMalformed:
                continue

            for tileEntity in chunk.TileEntities:
                if tileEntity['id'].value == 'Sign':
                    signCount += 1

                    outFile.write(str([tileEntity[x].value for x in 'xyz']) + '\n')
                    for i in range(4):
                        signText = tileEntity['Text{0}'.format(i + 1)].value
                        outFile.write(signText + '\n')

            if i % 100 == 0:
                print('Chunk {0}...'.format(i))


        print('Dumped {0} signs to {1}'.format(signCount, filename))

        outFile.close()

    def _region(self, command):
        '''
    region [rx rz]

    List region files in this world.
    '''
        level = self.level
        assert(isinstance(level, mclevel.MCInfdevOldLevel))
        assert level.version

        def getFreeSectors(rf):
            runs = []
            start = None
            count = 0
            for i, free in enumerate(rf.freeSectors):
                if free:
                    if start is None:
                        start = i
                        count = 1
                    else:
                        count += 1
                else:
                    if start is None:
                        pass
                    else:
                        runs.append((start, count))
                        start = None
                        count = 0

            return runs

        def printFreeSectors(runs):

            for i, (start, count) in enumerate(runs):
                if i % 4 == 3:
                    print('')
                print('{start:>6}+{count:<4}'.format(**locals()), end=' ')

            print('')

        if len(command):
            if len(command) > 1:
                rx, rz = [int(x) for x in command[:2]]
                print('Calling allChunks to preload region files: %d chunks' % len(level.allChunks))
                rf = level.regionFiles.get((rx, rz))
                if rf is None:
                    print('Region {rx},{rz} not found.'.format(**locals()))
                    return

                print('Region {rx:6}, {rz:6}: {used}/{sectors} sectors'.format(used=rf.usedSectors, sectors=rf.sectorCount))
                print('Offset Table:')
                for cx in range(32):
                    for cz in range(32):
                        if cz % 4 == 0:
                            print('')
                            print('{0:3}, {1:3}: '.format(cx, cz), end=' ')
                        off = rf.getOffset(cx, cz)
                        sector, length = off >> 8, off & 0xff
                        print('{sector:>6}+{length:<2} '.format(**locals()), end=' ')
                    print('')

                runs = getFreeSectors(rf)
                if len(runs):
                    print('Free sectors:', end=' ')

                    printFreeSectors(runs)

            else:
                if command[0] == 'free':
                    print('Calling allChunks to preload region files: %d chunks' % len(level.allChunks))
                    for (rx, rz), rf in level.regionFiles.items():

                        runs = getFreeSectors(rf)
                        if len(runs):
                            print('R {0:3}, {1:3}:'.format(rx, rz), end=' ')
                            printFreeSectors(runs)

        else:
            print('Calling allChunks to preload region files: %d chunks' % len(level.allChunks))
            coords = (r for r in level.regionFiles)
            for i, (rx, rz) in enumerate(coords):
                print('({rx:6}, {rz:6}): {count}, '.format(count=level.regionFiles[rx, rz].chunkCount), end=' ')
                if i % 5 == 4:
                    print('')

    def _repair(self, command):
        '''
    repair

    Attempt to repair inconsistent region files.
    MAKE A BACKUP. WILL DELETE YOUR DATA.

    Scans for and repairs errors in region files:
        Deletes chunks whose sectors overlap with another chunk
        Rearranges chunks that are in the wrong slot in the offset table
        Deletes completely unreadable chunks

    Only usable with region-format saves.
    '''
        if self.level.version:
            self.level.preloadRegions()
            for rf in self.level.regionFiles.values():
                rf.repair()

    def _dumpchests(self, command):
        '''
    dumpChests [ <filename> ]

    Saves the content and location of every chest in the world to a text file.
    With no filename, saves signs to <worldname>.chests

    Output is delimited by brackets and newlines. A set of coordinates in
    brackets begins a chest, followed by a line for each inventory slot.
    For example:

        [222, 51, 22]
        2 String
        3 String
        3 Iron bar

    Coordinates are ordered the same as point inputs:
        [North/South, Down/Up, East/West]

    '''
        from items import items
        if len(command):
            filename = command[0]
        else:
            filename = self.level.displayName + '.chests'

        outFile = open(filename, 'w')

        print('Dumping chests...')
        chestCount = 0

        for i, cPos in enumerate(self.level.allChunks):
            try:
                chunk = self.level.getChunk(*cPos)
            except mclevelbase.ChunkMalformed:
                continue

            for tileEntity in chunk.TileEntities:
                if tileEntity['id'].value == 'Chest':
                    chestCount += 1

                    outFile.write(str([tileEntity[x].value for x in 'xyz']) + '\n')
                    itemsTag = tileEntity['Items']
                    if len(itemsTag):
                        for itemTag in itemsTag:
                            try:
                                id = itemTag['id'].value
                                damage = itemTag['Damage'].value
                                item = items.findItem(id, damage)
                                itemname = item.name
                            except KeyError:
                                itemname = 'Unknown Item {0}'.format(itemTag)
                            except Exception as e:
                                itemname = repr(e)
                            outFile.write('{0} {1}\n'.format(itemTag['Count'].value, itemname))
                    else:
                        outFile.write('Empty Chest\n')

            if i % 100 == 0:
                print('Chunk {0}...'.format(i))


        print('Dumped {0} chests to {1}'.format(chestCount, filename))

        outFile.close()

    def _removeentities(self, command):
        '''
    removeEntities [ [except] [ <EntityID> [ <EntityID> ... ] ] ]

    Remove all entities matching one or more entity IDs.
    With the except keyword, removes all entities not
    matching one or more entity IDs.

    Without any IDs, removes all entities in the world,
    except for Paintings.

    Known Mob Entity IDs:
        Mob Monster Creeper Skeleton Spider Giant
        Zombie Slime Pig Sheep Cow Chicken

    Known Item Entity IDs: Item Arrow Snowball Painting

    Known Vehicle Entity IDs: Minecart Boat

    Known Dynamic Tile Entity IDs: PrimedTnt FallingSand
    '''
        ENT_MATCHTYPE_ANY = 0
        ENT_MATCHTYPE_EXCEPT = 1
        ENT_MATCHTYPE_NONPAINTING = 2

        def match(entityID, matchType, matchWords):
            if ENT_MATCHTYPE_ANY == matchType:
                return entityID.lower() in matchWords
            elif ENT_MATCHTYPE_EXCEPT == matchType:
                return not (entityID.lower() in matchWords)
            else:
                # ENT_MATCHTYPE_EXCEPT == matchType
                return entityID != 'Painting'

        removedEntities = {}
        match_words = []

        if len(command):
            if command[0].lower() == 'except':
                command.pop(0)
                print('Removing all entities except ', command)
                match_type = ENT_MATCHTYPE_EXCEPT
            else:
                print('Removing {0}...'.format(', '.join(command)))
                match_type = ENT_MATCHTYPE_ANY

            match_words = [x.lower() for x in command]

        else:
            print('Removing all entities except Painting...')
            match_type = ENT_MATCHTYPE_NONPAINTING

        for cx, cz in self.level.allChunks:
            chunk = self.level.getChunk(cx, cz)
            entitiesRemoved = 0

            for entity in list(chunk.Entities):
                entityID = entity['id'].value

                if match(entityID, match_type, match_words):
                    removedEntities[entityID] = removedEntities.get(entityID, 0) + 1

                    chunk.Entities.remove(entity)
                    entitiesRemoved += 1

            if entitiesRemoved:
                chunk.chunkChanged(False)


        if len(removedEntities) == 0:
            print('No entities to remove.')
        else:
            print('Removed entities:')
            for entityID in sorted(removedEntities.keys()):
                print('  {0}: {1:6}'.format(entityID, removedEntities[entityID]))

        self.needsSave = True

    def _createchunks(self, command):
        '''
    createChunks <box>

    Creates any chunks not present in the specified region.
    New chunks are filled with only air. New chunks are written
    to disk immediately.
    '''
        if len(command) == 0:
            self.printUsage('createchunks')
            return

        box = self.readBox(command)

        chunksCreated = self.level.createChunksInBox(box)

        print('Created {0} chunks.' .format(len(chunksCreated)))

        self.needsSave = True

    def _deletechunks(self, command):
        '''
    deleteChunks <box>

    Removes all chunks contained in the specified region.
    Chunks are deleted from disk immediately.
    '''
        if len(command) == 0:
            self.printUsage('deletechunks')
            return

        box = self.readBox(command)

        deletedChunks = self.level.deleteChunksInBox(box)

        print('Deleted {0} chunks.' .format(len(deletedChunks)))

    def _prune(self, command):
        '''
    prune <box>

    Removes all chunks not contained in the specified region. Useful for enforcing a finite map size.
    Chunks are deleted from disk immediately.
    '''
        if len(command) == 0:
            self.printUsage('prune')
            return

        box = self.readBox(command)

        i = 0
        for cx, cz in list(self.level.allChunks):
            if cx < box.mincx or cx >= box.maxcx or cz < box.mincz or cz >= box.maxcz:
                self.level.deleteChunk(cx, cz)
                i += 1

        print('Pruned {0} chunks.' .format(i))

    def _relight(self, command):
        '''
    relight [ <box> ]

    Recalculates lights in the region specified. If omitted,
    recalculates the entire world.
    '''
        if len(command):
            box = self.readBox(command)
            # TODO: Can I rewrite this more efficiently?
            chunks = itertools.product(list(range(box.mincx, box.maxcx)), list(range(box.mincz, box.maxcz)))

        else:
            chunks = self.level.allChunks

        self.level.generateLights(chunks)

        print('Relit 0 chunks.')
        self.needsSave = True

    def _create(self, command):
        '''
    create [ <filename> ]

    Create and load a new Minecraft Alpha world. This world will have no
    chunks and a random terrain seed. If run from the shell, filename is not
    needed because you already specified a filename earlier in the command.
    For example:

        mce.py MyWorld create

    '''
        if len(command) < 1:
            raise UsageError('Expected a filename')

        filename = command[0]
        if not os.path.exists(filename):
            os.mkdir(filename)

        if not os.path.isdir(filename):
            raise IOError('{0} already exists'.format(filename))

        if mclevel.MCInfdevOldLevel.isLevel(filename):
            raise IOError('{0} is already a Minecraft Alpha world'.format(filename))

        level = mclevel.MCInfdevOldLevel(filename, create=True)

        self.level = level

    def _degrief(self, command):
        '''
    degrief [ <height> ]

    Reverse a few forms of griefing by removing
    Adminium, Obsidian, Fire, and Lava wherever
    they occur above the specified height.
    Without a height, uses height level 32.

    Removes natural surface lava.

    Also see removeEntities
    '''
        box = self.level.bounds
        box = BoundingBox(box.origin + (0, 32, 0), box.size - (0, 32, 0))
        if len(command):
            try:
                box.miny = int(command[0])
            except ValueError:
                pass

        print('Removing grief matter and surface lava above height {0}...'.format(box.miny))

        self.level.fillBlocks(box,
                              self.level.materials.Air,
                              blocksToReplace=[self.level.materials.Bedrock,
                                self.level.materials.Obsidian,
                                self.level.materials.Fire,
                                self.level.materials.LavaActive,
                                self.level.materials.Lava,
                                ]
                              )
        self.needsSave = True

    def _time(self, command):
        '''
    time [time of day]

    Set or display the time of day. Acceptable values are 'morning', 'noon',
    'evening', 'midnight', or a time of day such as 8:02, 12:30 PM, or 16:45.
    '''
        ticks = self.level.Time
        timeOfDay = ticks % 24000
        ageInTicks = ticks - timeOfDay
        if len(command) == 0:

            days = ageInTicks / 24000
            hours = timeOfDay / 1000
            clockHours = (hours + 6) % 24

            ampm = ('AM', 'PM')[clockHours > 11]

            minutes = (timeOfDay % 1000) / 60

            print('It is {0}:{1:02} {2} on Day {3}'.format(clockHours % 12 or 12, minutes, ampm, days))
        else:
            times = {'morning': 6, 'noon': 12, 'evening': 18, 'midnight': 24}
            word = command[0]
            minutes = 0

            if word in times:
                hours = times[word]
            else:
                try:
                    if ':' in word:
                        h, m = word.split(':')
                        hours = int(h)
                        minutes = int(m)
                    else:
                        hours = int(word)
                except Exception as e:
                    raise UsageError(('Cannot interpret time, ', e))

                if len(command) > 1:
                    if command[1].lower() == 'pm':
                        hours += 12

            ticks = ageInTicks + hours * 1000 + minutes * 1000 / 60 - 6000
            if ticks < 0:
                ticks += 18000

            ampm = ('AM', 'PM')[hours > 11 and hours < 24]
            print('Changed time to {0}:{1:02} {2}'.format(hours % 12 or 12, minutes, ampm))
            self.level.Time = ticks
            self.needsSave = True

    def _randomseed(self, command):
        '''
    randomseed [ <seed> ]

    Set or display the world's random seed, a 64-bit integer that uniquely
    defines the world's terrain.
    '''
        if len(command):
            try:
                seed = int(command[0])
            except ValueError:
                raise UsageError('Expected a long integer.')

            self.level.RandomSeed = seed
            self.needsSave = True
        else:
            print('Random Seed: ', self.level.RandomSeed)

    def _gametype(self, command):
        '''
    gametype [ <player> [ <gametype> ] ]

    Set or display the player's game type, an integer that identifies whether
    their game is survival (0) or creative (1).  On single-player worlds, the
    player is just 'Player'.
    '''
        if len(command) == 0:
            print('Players: ')
            for player in self.level.players:
                print('    {0}: {1}'.format(player, self.level.getPlayerGameType(player)))
            return

        player = command.pop(0)
        if len(command) == 0:
            print('Player {0}: {1}'.format(player, self.level.getPlayerGameType(player)))
            return

        try:
            gametype = int(command[0])
        except ValueError:
            raise UsageError('Expected an integer.')

        self.level.setPlayerGameType(gametype, player)
        self.needsSave = True

    def _worldsize(self, command):
        '''
    worldsize

    Computes and prints the dimensions of the world.  For infinite worlds,
    also prints the most negative corner.
    '''
        bounds = self.level.bounds
        if isinstance(self.level, mclevel.MCInfdevOldLevel):
            print('\nWorld size: \n  {0[0]:7} north to south\n  {0[2]:7} east to west\n'.format(bounds.size))
            print('Smallest and largest points: ({0[0]},{0[2]}), ({1[0]},{1[2]})'.format(bounds.origin, bounds.maximum))

        else:
            print('\nWorld size: \n  {0[0]:7} wide\n  {0[1]:7} tall\n  {0[2]:7} long\n'.format(bounds.size))

    def _heightmap(self, command):
        '''
    heightmap <filename>

    Takes a png and imports it as the terrain starting at chunk 0,0.
    Data is internally converted to greyscale and scaled to the maximum height.
    The game will fill the terrain with trees and mineral deposits the next
    time you play the level.

    Please please please try out a small test image before using a big source.
    Using the levels tool to get a good heightmap is an art, not a science.
    A smaller map lets you experiment and get it right before having to blow
    all night generating the really big map.

    Requires the PIL library.
    '''
        if len(command) == 0:
            self.printUsage('heightmap')
            return

        if not sys.stdin.isatty() or input(
     'This will destroy a large portion of the map and may take a long time.  Did you really want to do this?'
     ).lower() in ('yes', 'y', '1', 'true'):

            from PIL import Image
            import datetime

            filename = command.pop(0)

            imgobj = Image.open(filename)

            greyimg = imgobj.convert('L')  # luminance
            del imgobj

            width, height = greyimg.size

            water_level = 64

            xchunks = (height + 15) / 16
            zchunks = (width + 15) / 16

            start = datetime.datetime.now()
            for cx in range(xchunks):
                for cz in range(zchunks):
                    try:
                        self.level.createChunk(cx, cz)
                    except:
                        pass
                    c = self.level.getChunk(cx, cz)

                    imgarray = numpy.asarray(greyimg.crop((cz * 16, cx * 16, cz * 16 + 16, cx * 16 + 16)))
                    imgarray = imgarray / 2  # scale to 0-127

                    for x in range(16):
                        for z in range(16):
                            if z + (cz * 16) < width - 1 and x + (cx * 16) < height - 1:
                                # world dimension X goes north-south
                                # first array axis goes up-down

                                h = imgarray[x, z]

                                c.Blocks[x, z, h + 1:] = 0  # air
                                c.Blocks[x, z, h:h + 1] = 2  # grass
                                c.Blocks[x, z, h - 4:h] = 3  # dirt
                                c.Blocks[x, z, :h - 4] = 1  # rock

                                if h < water_level:
                                    c.Blocks[x, z, h + 1:water_level] = 9  # water
                                if h < water_level + 2:
                                    c.Blocks[x, z, h - 2:h + 1] = 12  # sand if it's near water level

                                c.Blocks[x, z, 0] = 7  # bedrock

                    c.chunkChanged()
                    c.TerrainPopulated = False
                    # the quick lighting from chunkChanged has already lit this simple terrain completely
                    c.needsLighting = False

                logging.info('%s Just did chunk %d,%d' % (datetime.datetime.now().strftime('[%H:%M:%S]'), cx, cz))

            logging.info('Done with mapping!')
            self.needsSave = True
            stop = datetime.datetime.now()
            logging.info('Took %s.' % str(stop - start))

            spawnz = width / 2
            spawnx = height / 2
            spawny = greyimg.getpixel((spawnx, spawnz))
            logging.info('You probably want to change your spawn point. I suggest {0}'.format((spawnx, spawny, spawnz)))

    def _execute(self, command):
        '''
    execute <filename>
    Execute all commands in a file and save.
    '''
        if len(command) == 0:
            print('You must give the file with commands to execute')
        else:
            commandFile = open(command[0], 'r')
            commandsFromFile = commandFile.readlines()
            for commandFromFile in commandsFromFile:
                print(commandFromFile)
                self.processCommand(commandFromFile)
            self._save('')

    def _quit(self, command):
        '''
    quit [ yes | no ]

    Quits the program.
    Without 'yes' or 'no', prompts to save before quitting.

    In batch mode, an end of file automatically saves the level.
    '''
        if len(command) == 0 or not (command[0].lower() in ('yes', 'no')):
            if input('Save before exit? ').lower() in ('yes', 'y', '1', 'true'):
                self._save(command)
                raise SystemExit
        if len(command) and command[0].lower == 'yes':
            self._save(command)

        raise SystemExit

    def _exit(self, command):
        self._quit(command)

    def _save(self, command):
        if self.needsSave:
            self.level.generateLights()
            self.level.saveInPlace()
            self.needsSave = False

    def _load(self, command):
        '''
    load [ <filename> | <world number> ]

    Loads another world, discarding all changes to this world.
    '''
        if len(command) == 0:
            self.printUsage('load')
        self.loadWorld(command[0])

    def _reload(self, command):
        self.level = mclevel.fromFile(self.level.filename)

    def _dimension(self, command):
        '''
    dimension [ <dim> ]

    Load another dimension, a sub-world of this level. Without options, lists
    all of the dimensions found in this world. <dim> can be a number or one of
    these keywords:
        nether, hell, slip: DIM-1
        earth, overworld, parent: parent world
        end: DIM1
    '''

        if len(command):
            if command[0].lower() in ('earth', 'overworld', 'parent'):
                if self.level.parentWorld:
                    self.level = self.level.parentWorld
                    return
                else:
                    print('You are already on earth.')
                    return

            elif command[0].lower() in ('hell', 'nether', 'slip'):
                dimNo = -1
            elif command[0].lower() == 'end':
                dimNo = 1
            else:
                dimNo = self.readInt(command)

            if dimNo in self.level.dimensions:
                self.level = self.level.dimensions[dimNo]
                return

        if self.level.parentWorld:
            print('Parent world: {0} ("dimension parent" to return)'.format(self.level.parentWorld.displayName))

        if len(self.level.dimensions):
            print('Dimensions in {0}:'.format(self.level.displayName))
            for k in self.level.dimensions:
                print('{0}: {1}'.format(k, infiniteworld.MCAlphaDimension.dimensionNames.get(k, 'Unknown')))

    def _help(self, command):
        if len(command):
            self.printUsage(command[0])
        else:
            self.printUsage()

    def _blocks(self, command):
        '''
    blocks [ <block name> | <block ID> ]

    Prints block IDs matching the name, or the name matching the ID.
    With nothing, prints a list of all blocks.
    '''

        searchName = None
        if len(command):
            searchName = ' '.join(command)
            try:
                searchNumber = int(searchName)
            except ValueError:
                searchNumber = None
                matches = self.level.materials.blocksMatching(searchName)
            else:
                matches = [b for b in self.level.materials.allBlocks if b.ID == searchNumber]
#                print '{0:3}: {1}'.format(searchNumber, self.level.materials.names[searchNumber])
 #               return

        else:
            matches = self.level.materials.allBlocks

        print('{id:9} : {name} {aka}'.format(id='(ID:data)', name='Block name', aka='[Other names]'))
        for b in sorted(matches):
            idstring = '({ID}:{data})'.format(ID=b.ID, data=b.blockData)
            aka = b.aka and ' [{aka}]'.format(aka=b.aka) or ''

            print('{idstring:9} : {name} {aka}'.format(idstring=idstring, name=b.name, aka=aka))

    def printUsage(self, command=''):
        if command.lower() in self.commands:
            print('Usage: ', self.commandUsage(command.lower()))
        else:
            print(self.__doc__.format(commandPrefix=('', 'mce.py <world> ')[not self.batchMode]))

    def printUsageAndQuit(self):
        self.printUsage()
        raise SystemExit

    def loadWorld(self, world):

        worldpath = os.path.expanduser(world)
        if os.path.exists(worldpath):
            self.level = mclevel.fromFile(worldpath)
        else:
            self.level = mclevel.loadWorld(world)

    level = None

    batchMode = False

    def run(self):
        logging.basicConfig(format='%(levelname)s:%(message)s')
        logging.getLogger().level = logging.INFO

        sys.argv.pop(0)

        if len(sys.argv):
            world = sys.argv.pop(0)

            if world.lower() in ('-h', '--help'):
                self.printUsageAndQuit()

            if len(sys.argv) and sys.argv[0].lower() == 'create':
                # accept the syntax, 'mce world3 create'
                self._create([world])
                print('Created world {0}'.format(world))

                sys.exit(0)
            else:
                self.loadWorld(world)
        else:
            self.batchMode = True
            self.printUsage()

            while True:
                try:
                    world = input('Please enter world name or path to world folder: ')
                    self.loadWorld(world)
                except EOFError as e:
                    print('End of input.')
                    raise SystemExit
                except Exception as e:
                    print('Cannot open {0}: {1}'.format(world, e))
                else:
                    break

        if len(sys.argv):
            # process one command from command line
            try:
                self.processCommand(' '.join(sys.argv))
            except UsageError:
                self.printUsageAndQuit()
            self._save([])

        else:
            # process many commands on standard input, maybe interactively
            command = ['']
            self.batchMode = True
            while True:
                try:
                    command = input('{0}> '.format(self.level.displayName))
                    print()
                    self.processCommand(command)

                except EOFError as e:
                    print('End of file. Saving automatically.')
                    self._save([])
                    raise SystemExit
                except Exception as e:
                    if self.debug:
                        traceback.print_exc()
                    print('Exception during command: {0!r}'.format(e))
                    print('Use "debug" to enable tracebacks.')

                    # self.printUsage()

    def processCommand(self, command):
        command = command.strip()

        if len(command) == 0:
            return

        if command[0] == '#':
            return

        commandWords = command.split()

        keyword = commandWords.pop(0).lower()
        if not keyword in self.commands:
            matches = [x for x in self.commands if x.startswith(keyword)]
            if len(matches) == 1:
                keyword = matches[0]
            elif len(matches):
                print('Ambiguous command. Matches: ')
                for k in matches:
                    print('  ', k)
                return
            else:
                raise UsageError('Command {0} not recognized.'.format(keyword))

        func = getattr(self, '_' + keyword)

        try:
            func(commandWords)
        except PlayerNotFound as e:
            print('Cannot find player {0}'.format(e.args[0]))
            self._player([])

        except UsageError as e:
            print(e)
            if self.debug:
                traceback.print_exc()
            self.printUsage(keyword)


def main(argv):
    profile = os.getenv('MCE_PROFILE', None)
    editor = mce()
    if profile:
        print('Profiling enabled')
        import cProfile
        cProfile.runctx('editor.run()', locals(), globals(), profile)
    else:
        editor.run()

    return 0

if __name__ == '__main__':
    sys.exit(main(sys.argv))