Module:Chessboard
local p = {}
function chessboard(args, size, rev, letters, numbers, header, footer, align, clear)
function image_square( pc, row, col, size )
local colornames = { l = 'white', d = 'black' }
local piecenames = {
p = 'pawn',
r = 'rook',
n = 'knight',
b = 'bishop',
q = 'queen',
k = 'king',
a = 'archbishop',
c = 'chancelor',
z = 'champion',
w = 'wizard',
t = 'fool',
h = 'upside-down pawn',
m = 'upside-down rook',
s = 'upside-down knight',
f = 'upside-down king',
e = 'upside-down bishop',
g = 'upside-down queen',
}
local symnames = {
xx = 'black cross',
ox = 'white cross',
xo = 'black circle',
oo = 'white circle',
ul = 'up-left arrow',
ua = 'up arrow',
ur = 'up-right arrow',
la = 'left arrow',
ra = 'right arrow',
dl = 'down-left arrow',
da = 'down arrow',
dr = 'down-right arrow',
lr = 'left-right arrow',
ud = 'up-down arrow',
x0 = 'zero',
x1 = 'one',
x2 = 'two',
x3 = 'three',
x4 = 'four',
x5 = 'five',
x6 = 'six',
x7 = 'seven',
x8 = 'eight',
x9 = 'nine',
}
function colchar( col )
return ( 'abcdefgh' ):sub( col, col )
end
local color = mw.ustring.gsub( pc, '^.*(%w)(%w).*$', '%2' ) or
local piece = mw.ustring.gsub( pc, '^.*(%w)(%w).*$', '%1' ) or
local alt = colchar( col ) .. row .. ' '
if colornames[color] and piecenames[piece] then
alt = alt .. colornames[color] .. ' ' .. piecenames[piece]
else
alt = alt .. ( symnames[piece .. color] or piece .. ' ' .. color )
end
return string.format( '%s', piece, color, size, size, alt, alt )
end
function letters_row( rev, num_lt, num_rt )
local td = ''
local legends = 'abcdefgh'
local l = mw.text.split( rev and legends:reverse() or legends, )
return '\n' .. ( num_lt and '' or )
.. td
.. table.concat( l, '' .. td ) .. '' .. ( num_rt and '' or ) .. '\n' end local letters_tp = letters:match( 'both' ) or letters:match( 'top' ) local letters_bt = letters:match( 'both' ) or letters:match( 'bottom' ) local numbers_lt = numbers:match( 'both' ) or numbers:match( 'left' ) local numbers_rt = numbers:match( 'both' ) or numbers:match( 'right' ) local width = 8 * size + 2 if ( numbers_lt ) then width = width + 18 end if ( numbers_rt ) then width = width + 18 end local b = local caption = if ( letters_tp ) then b = b .. letters_row( rev, numbers_lt, numbers_rt ) .. '\n' end b = b .. '' if ( numbers_lt ) then b = b .. '' .. (rev and 1 or 8) .. '' end b = b .. '
b = b .. string.format( ''', 8 * size, 8 * size ) for trow = 1,8 do local row = rev and trow or ( 9 - trow ) for tcol = 1,8 do local col = rev and ( 9 - tcol ) or tcol local piece = args[8 * ( 8 - row ) + col + 2] or if piece:match( '%w%w' ) then local img = image_square(piece:match('%w%w'), row, col, size ) b = b .. string.format(
( trow - 1 ) * size, ( tcol - 1 ) * size, img )
end
end
end
b = b .. '' if ( numbers_rt ) then b = b .. '' .. (rev and 1 or 8) .. '' end b = b .. '' if ( numbers_lt or numbers_rt ) then for trow = 2, 8 do local row = rev and trow or ( 9 - trow ) b = b .. '' if ( numbers_lt ) then b = b .. '' .. row .. '' end if ( numbers_rt ) then b = b .. '' .. row .. '' end b = b .. '\n' end end if ( letters_bt ) then b = b .. letters_row( rev, numbers_lt, numbers_rt ) .. '\n' end if footer:match( '^%s*$' ) then else caption = '
\n'
end
return '
'
end
function convertFenToArgs( fen )
-- converts FEN notation to 64 entry array of positions, offset by 2
local res = { ' ', ' ' }
-- Loop over rows, which are delimited by /
for srow in string.gmatch( "/" .. fen, "/%w+" ) do
-- Loop over all letters and numbers in the row
for piece in srow:gmatch( "%w" ) do
if piece:match( "%d" ) then -- if a digit
for k=1,piece do
table.insert(res,' ')
end
else -- not a digit
local color = piece:match( '%u' ) and 'l' or 'd'
piece = piece:lower()
table.insert( res, piece .. color )
end
end
end
return res
end
function convertArgsToFen( args, offset )
function nullOrWhitespace( s ) return not s or s:match( '^%s*(.-)%s*$' ) == end
function piece( s )
return nullOrWhitespace( s ) and 1
or s:gsub( '%s*(%a)(%a)%s*', function( a, b ) return b == 'l' and a:upper() or a end )
end
local res =
offset = offset or 0
for row = 1, 8 do
for file = 1, 8 do
res = res .. piece( args[8*(row - 1) + file + offset] )
end
if row < 8 then res = res .. '/' end
end
return mw.ustring.gsub(res, '1+', function( s ) return #s end )
end
function p.board(frame)
local args = frame.args
local pargs = frame:getParent().args
local size = args.size or pargs.size or '26'
local reverse = ( args.reverse or pargs.reverse or ):lower() == "true"
local letters = ( args.letters or pargs.letters or 'both' ):lower()
local numbers = ( args.numbers or pargs.numbers or 'both' ):lower()
local header = args[2] or pargs[2] or
local footer = args[67] or pargs[67] or
local align = ( args[1] or pargs[1] or 'tright' ):lower()
local clear = args.clear or pargs.clear or ( align:match('tright') and 'right' ) or 'none'
local fen = args.fen or pargs.fen
size = mw.ustring.match( size, '[%d]+' ) or '26' -- remove px from size
if (fen) then
align = args.align or pargs.align or 'tright'
clear = args.clear or pargs.clear or ( align:match('tright') and 'right' ) or 'none'
header = args.header or pargs.header or
footer = args.footer or pargs.footer or
return chessboard( convertFenToArgs( fen ), size, reverse, letters, numbers, header, footer, align, clear )
end
if args[3] then
return chessboard(args, size, reverse, letters, numbers, header, footer, align, clear)
else
return chessboard(pargs, size, reverse, letters, numbers, header, footer, align, clear)
end
end
function p.fen2ascii(frame)
-- Lua error at line 211: invalid value (nil) at index 3 in table for 'concat'.
local b = convertFenToArgs( frame.args.fen )
local res = '|=\n'
local offset = 2
for row = 1,8 do
local n = (9 - row)
res = res .. n .. ' |' ..
table.concat(b, '|', 8*(row-1) + 1 + offset, 8*(row-1) + 8 + offset) .. '|=\n'
end
res = mw.ustring.gsub( res,'\| \|', '| |' )
res = mw.ustring.gsub( res,'\| \|', '| |' )
res = res .. ' a b c d e f g h'
return res
end
function p.ascii2fen( frame )
-- 2....5/8/8/8/8/8/8/89 return convertArgsToFen( frame.args, frame.args.offset or 1 )
end
return p