Module:Color2dec

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--The function "tincture" converts valid tincture names to hexadecimal colorcode
--  e.g. 'argent' will give '#FFF'
--The function "convert" converts a valid hexadecimal colorcode into three decimal numbers: 
--	#bbccdd gives 187|187|204,  while #FF0 will give 255|255|0 
--The function "tbcgen" generates a complete 5-parameter string 
--Invalid color codes will give invalid or unpredictable results, or LUA errors.

local p = {}

--
local function hexdec ( arg )
	local dig  =  ( string.upper ( string.char ( arg ) ) );
	local dec  =  0;
	if     dig == 'F' then  dec = 0xF
	elseif dig == 'E' then  dec = 0xE
	elseif dig == 'D' then  dec = 0xD
	elseif dig == 'C' then  dec = 0xC
	elseif dig == 'B' then  dec = 0xB
	elseif dig == 'A' then  dec = 0xA
	else   dec = tonumber (dig)
	end
	return dec;
end  

-- 
local function convert ( arg )
	local hex  =  arg or '#000';
	local dec  =  {};
	if #hex == 7 then
		dec [1] = hexdec ( string.byte (hex, 2)) * 16 + hexdec (string.byte (hex, 3))
		dec [2] = hexdec ( string.byte (hex, 4)) * 16 + hexdec (string.byte (hex, 5))
		dec [3] = hexdec ( string.byte (hex, 6)) * 16 + hexdec (string.byte (hex, 7))
	else
		dec [1] = hexdec ( string.byte (hex, 2)) * 16 + hexdec (string.byte (hex, 2))
		dec [2] = hexdec ( string.byte (hex, 3)) * 16 + hexdec (string.byte (hex, 3))
		dec [3] = hexdec ( string.byte (hex, 4)) * 16 + hexdec (string.byte (hex, 4))
	end  
	return dec;
end

-- global=args[1], local=frame
function p.tincture ( frame )
	local args = frame.args
	local inp = ''
	if  args then
        inp   =  args[1] or 'glo'
	elseif  frame then
         inp  =  frame or 'loc'
--	else inp  = 'Tinct wo'
	end
    if  mw.ustring.sub ( inp, 1, 1 ) == '#' then
    	return inp;
	end
	local low  =  ( string.lower ( inp ) );
	local out  =  '';
	if     low == 'argent'    then  out = '#FFF'
	elseif low == 'argent-d'  then  out = '#E7E7E7'
	elseif low == 'azure'     then  out = '#0F47AF'
	elseif low == 'carnation' then  out = '#F2A772'
	elseif low == 'celeste'   then  out = '#89C5E3'
	elseif low == 'cendrée'   then  out = '#999'
	elseif low == 'gules'     then  out = '#DA121A'
	elseif low == 'or'        then  out = '#FCDD09'
	elseif low == 'purpure'   then  out = '#9116A1'
	elseif low == 'sable'     then  out = '#000'
	elseif low == 'tawny'     then  out = '#9D5333'
	elseif low == 'vert'      then  out = '#078930'
	else   out = '#abcdef' .. inp
	end
	return out;
end

-- global=args[1], local=frame
function p.decode ( frame )
	local args = frame.args
	local str = ''
	if  args then
       str   =  args[1] or 'glo'
	elseif  frame then
       str   =  frame or 'loc'
--	else str = 'decode wo'
	end
    if  mw.ustring.sub ( str, 1, 1 ) == '#' then 
         return '#' .. mw.ustring.sub( str, 2, #str );
    elseif mw.ustring.sub ( str, 1, 1 ) == '*' then 
         return '*' .. mw.ustring.sub( str, 2, #str );
    elseif mw.ustring.sub ( str, 1, 1 ) == ':' then 
         return ':' .. mw.ustring.sub( str, 2, #str );
    elseif mw.ustring.sub ( str, 1, 1 ) == ';' then 
         return '&#59;' .. mw.ustring.sub( str, 2, #str );
    else
         return str;
    end
end


-- global with 2 parms
function p.tbcgen ( frame )
    local args = frame.args;
    local arg1 = args[1] or '#000000';
	local tbctab = {};
	local hexcod = '';
	hexcod = p.tincture ( arg1 );
	decval = convert ( hexcod ); 
	tbctab [1]   = '0';
	tbctab [2]   = decval [1];
	tbctab [3]   = decval [2];
	tbctab [4]   = decval [3];
	tbctab [5]   = p.decode ( args[2] or 'couleur' );
	return mw.getCurrentFrame():expandTemplate{ title = 'Tbc', args =  tbctab };
end
	
return p;