Module:WeatherBoxColors

w = {}; math_mod = require( 'Module:Math' );

function hex( value ) return string.format("%02X", value) end

function format_line( background, text_color ) return table.concat( {"background: #", background, "; color:#", text_color, ";"} ); end

function range_pos( value, start, stop ) if start < stop then if value < start then return 0; elseif value > stop then return 1; else return (value - start) / (stop - start); end else if value < stop then return 1; elseif value > start then return 0; else return (start - value) / (start - stop); end end end

function w.color_d( frame ) local val = math_mod._cleanNumber( frame.args[1] ); return w._days_color( val ); end function w.color_pastel( frame ) local val = math_mod._cleanNumber( frame.args[1] ); return w._pastel_color( val ); end function w.color_t( frame ) local val = math_mod._cleanNumber( frame.args[1] ); return w._temperature_color( val ); end function w.color_green( frame ) local val = math_mod._cleanNumber( frame.args[1] ); return w._green_color( val ); end function w.color_s( frame ) local val = math_mod._cleanNumber( frame.args[1] ); return w._sunshine_color( val ); end function w.color_h( frame ) local val = math_mod._cleanNumber( frame.args[1] ); return w._humidity_color( val ); end function w.color_p( frame ) local val = math_mod._cleanNumber( frame.args[1] ); return w._precipitation_color( val ); end

function w._days_color( val ) local item, background, text_color; if val == nil then return format_line( "FFFFFF", "000000" ); end item = hex( range_pos( val, 20, 0 )*255 ); background = item .. item; item = hex( range_pos( val, 40, 20 )*255 ); background = background .. item; if val >= 12 then text_color = "FFFFFF"; else text_color = "000000"; end return format_line( background, text_color ); end

function w._green_color( val ) local item1, item2, background, text_color; if val == nil then return format_line( "FFFFFF", "000000" ); end item1 = hex( range_pos( val, 165.6, 0 )*255 ); item2 = hex( range_pos( val, 300, 165.61 )*207 + 48 ); background = table.concat( { item1, item2, item1 } ); if val >= 200 then text_color = "FFFFFF"; else text_color = "000000"; end return format_line( background, text_color ); end

function w._temperature_color( val ) local item, background, text_color; if val == nil then return format_line( "FFFFFF", "000000" ); end if val < 4.5 then item = range_pos( val, -42.75, 4.5 )*255; background = hex( item ); else item = range_pos( val, 60, 41.5 )*255; background = hex( item ); end if val <= 4.5 then item = range_pos( val, -42.75, 4.5 )*255; background = background .. hex( item ); else item = range_pos( val, 41.5, 4.5 )*255; background = background .. hex( item ); end if val < -42.78 then item = range_pos( val, -90, -42.78 )*255; background = background .. hex( item ); else item = range_pos( val, 23, 4.5 )*255; background = background .. hex( item ); end if val < -23.3 or val >= 37.8 then text_color = "FFFFFF"; else text_color = "000000"; end return format_line( background, text_color ); end

function w._precipitation_color( val ) local item, background, text_color; if val == nil then return format_line( "FFFFFF", "000000" ); end item = hex( range_pos( val, 165.6, 0 )*255 ); background = item .. item; item = hex( range_pos( val, 300, 165.61 )*207 + 48 ); background = background .. item; if val > 90 then text_color = "FFFFFF"; else text_color = "000000"; end

return format_line( background, text_color ); end

function w._humidity_color( val ) local item, background, text_color; if val == nil then return format_line( "FFFFFF", "000000" ); end item = hex( range_pos( val, 66.67, 0 )*255 ); background = item .. item; item = hex( range_pos( val, 133.33, 66.667 )*255 ); background = background .. item; if val >= 40 then text_color = "FFFFFF"; else text_color = "000000"; end

return format_line( background, text_color ); end

function w._sunshine_color( val ) local item, background, text_color; if val == nil then return format_line( "FFFFFF", "000000" ); end if val < 90 then item = hex( range_pos( val, 0, 90 )*170 ); elseif val < 180 then item = hex( range_pos( val, 90, 180 )*42.5 + 170 ); else item = hex( range_pos( val, 180, 360 )*42.5 + 212.5 ); end background = item .. item; if val < 90 then item = hex( range_pos( val, 0, 90 )*170 ); elseif val < 270 then item = hex( range_pos( val, 150, 90 )*170 ); else item = hex( range_pos( val, 270, 720 )*255 ); end background = background .. item; if val < 80 then text_color = "FFFFFF"; else text_color = "000000"; end

return format_line( background, text_color ); end

function w._pastel_color( val ) local item, background, text_color; if val == nil then return format_line( "FFFFFF", "000000" ); end

if val < -15 or val >= 39 then text_color = "FFFFFF"; else text_color = "000000"; end if val >= 51 then background = 'EE2200'; else val = math_mod._round( (val + 25.5)/3, 0 ); if val == 1 then background = 'BB00CC'; elseif val == 2 then background = 'CC00EE'; elseif val == 3 then background = 'CC33EE'; elseif val == 4 then background = 'CC55EE'; elseif val == 5 then background = 'DD66EE'; elseif val == 6 then background = 'DD77EE'; elseif val == 7 then background = 'DD99EE'; elseif val == 8 then background = 'DDAAEE'; elseif val == 9 then background = 'DDBBEE'; elseif val == 10 then background = 'EECCFF'; elseif val == 11 then background = 'FFDDFF'; elseif val == 12 then background = 'F1F1F1'; elseif val == 13 then background = 'FFEEBB'; elseif val == 14 then background = 'FFFFCC'; elseif val == 15 then background = 'FFFFBB'; elseif val == 16 then background = 'FFFFAA'; elseif val == 17 then background = 'FFFF88'; elseif val == 18 then background = 'FFCC33'; elseif val == 19 then background = 'FFBB33'; elseif val == 20 then background = 'FF9900'; elseif val == 21 then background = 'FF8844'; elseif val == 22 then background = 'FF6633'; elseif val == 23 then background = 'FF5522'; elseif val == 24 then background = 'FF4422'; elseif val == 25 then background = 'EE4400'; else background = 'AA00AA' end end

return format_line( background, text_color ); end

function w._none_color( val ) return format_line( "FAFAFA", "000000" ); end

function w.interpret_color_code( code ) code = code:lower; if code == 't' then return w._temperature_color; elseif code == 'pastel' then return w._pastel_color; elseif code == 'green' then return w._green_color; elseif code == 'h' then return w._humidity_color; elseif code == 's' then return w._sunshine_color; elseif code == 'p' then return w._precipitation_color; elseif code == 'd' then return w._days_color; elseif code == 'none' then return w._none_color; else error( 'Unknown color scheme option' ); end end

return w;