Module:Chessboard#L-243

local p = {}

local cfg, nrows, ncols

local function innerboard(args, size, rev)

pattern = cfg.pattern or '%w%w'

local root = mw.html.create('div')

root:addClass('chess-pieces notheme')

:css('position', 'relative')

:wikitext(cfg.image_board(size))

for trow = 1,nrows do

local row = rev and trow or ( 1 + nrows - trow )

for tcol = 1,ncols do

local col = rev and ( 1 + ncols - tcol ) or tcol

local piece = args[ncols * ( nrows - row ) + col + 2] or ''

if piece:match( pattern ) then

local img = cfg.image_square(piece:match(pattern), row, col, size )

root:tag('div')

:css('top', tostring(( trow - 1 ) * size) .. 'px')

:css('left', tostring(( tcol - 1 ) * size) .. 'px')

:wikitext(img)

end

return tostring(root)

end

function chessboard(args, size, rev, letters, numbers, header, footer, align, clear)

function letters_row( rev, num_lt, num_rt )

local letters = cfg.letters()

local root = mw.html.create('')

if num_lt then

root:tag('td')

end

for k = 1,ncols do

root:tag('td')

:css('height', '18px')

:css('width', size .. 'px')

:wikitext(rev and letters[1+ncols-k] or letters[k])

end

if num_rt then

root:tag('td')

end

return tostring(root)

end

local letters_top = letters:match( 'both' ) or letters:match( 'top' )

local letters_bottom = letters:match( 'both' ) or letters:match( 'bottom' )

local numbers_left = numbers:match( 'both' ) or numbers:match( 'left' )

local numbers_right = numbers:match( 'both' ) or numbers:match( 'right' )

local width = ncols * size + 2

if ( numbers_left ) then width = width + 18 end

if ( numbers_right ) then width = width + 18 end

local root = mw.html.create('div')

:addClass('chessboard')

:addClass('thumb')

:addClass('noviewer')

:addClass(align)

if( header and header ~= '' ) then

root:tag('div')

:addClass('center')

:css('line-height', '130%')

:css('margin', '0 auto')

:css('max-width', (width + ncols) .. 'px')

:wikitext(header)

end

local div = root:tag('div')

:addClass('thumbinner')

:css('width', width .. 'px')

local b = div:tag('table')

:attr('cellpadding', '0')

:attr('cellspacing', '0')

if ( letters_top ) then

b:tag('tr')

:wikitext(letters_row( rev, numbers_left, numbers_right ))

end

local tablerow = b:tag('tr')

if ( numbers_left ) then

tablerow:tag('td')

:css('width', '18px')

:css('height', size .. 'px')

:wikitext(rev and 1 or nrows)

end

local td = tablerow:tag('td')

:attr('colspan', ncols)

:attr('rowspan', nrows)

:wikitext(innerboard(args, size, rev))

if ( numbers_right ) then

tablerow:tag('td')

:css('width', '18px')

:css('height', size .. 'px')

:wikitext(rev and 1 or nrows)

end

if ( numbers_left or numbers_right ) then

for trow = 2, nrows do

local idx = rev and trow or ( 1 + nrows - trow )

tablerow = b:tag('tr')

if ( numbers_left ) then

tablerow:tag('td')

:css('height', size .. 'px')

:wikitext(idx)

end

if ( numbers_right ) then

tablerow:tag('td')

:css('height', size .. 'px')

:wikitext(idx)

end

if ( letters_bottom ) then

b:tag('tr')

:wikitext(letters_row( rev, numbers_left, numbers_right ))

end

if footer and mw.text.trim(footer)~='' then

div:tag('div')

:addClass('thumbcaption')

:wikitext(footer)

end

return tostring(root) ..

mw.getCurrentFrame():extensionTag( 'templatestyles', '', { src = 'Module:Chessboard/styles.css' } )

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

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 style = args.style or pargs.style or 'Chess'

cfg = require('Module:Chessboard/' .. style)

nrows, ncols = cfg.dims()

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[nrows*ncols + 3] or pargs[nrows*ncols + 3] 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

local pgn = args.pgn or pargs.pgn

size = mw.ustring.match( size, '[%d]+' ) or '26' -- remove px from size

if (pgn) then

local pgnModule = require('Module:Pgn')

metadata, moves = pgnModule.main(pgn)

fen = moves[#moves]

end

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

return p