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Module:Gridiron color

Permanently protected module
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--
-- This module implements
-- {{Gridiron primary color}} -- {{Gridiron primary color raw}} -- {{Gridiron primary style}} -- {{Gridiron alt primary style}}
-- {{Gridiron secondary color}} -- {{Gridiron secondary color raw}}
-- {{Gridiron tertiary color raw}}
-- {{Gridiron alt primary color}} -- {{Gridiron alt primary style}} -- {{Gridiron alt secondary color}}
--

local p = {}

local color_data = mw.loadData("Module:Gridiron color/data")

local yesno = require('Module:Yesno')

local prefixes = {
	"background: ",
	"color: ",
	"/**/",
	"background: ",
	"color: "
	}
	
local default = {"#DCDCDC", "#000000", "none", "", ""}

local function get_year(colors, year)
	if colors and colors[6] and type(colors[6] == 'table') then
		for team, year_colors in pairs(colors[6]) do
			if mw.ustring.find(team, "%d%d%d%dthru%d%d%d%d$") then
				local start_year, end_year = mw.ustring.match(team, "(%d%d%d%d)thru(%d%d%d%d)$")
				if (tonumber(start_year) <= tonumber(year)) and (tonumber(year) <= tonumber(end_year)) then
					return year_colors
				end
			end
		end
	end
	
	return colors
end

local function get_colors(team, unknown, year)
	team = (team or ''):match("^%s*(.-)%s*$")
	year = tonumber(year)
	default = color_data and color_data["#default"] or default
	unknown = unknown or default

	
	local use_default = {
		[""] = 1,
		["retired"] = 1,
		["free agent"] = 1,
	}
	
	local colors = unknown
	
	if (not use_default[team:lower()]) then
		if mw.ustring.find(team, "%d?%d?%d%dthru%d?%d?%d%d$") then
			if (not year or year <= 0) then
				team, year = mw.ustring.match(team, "^(.-) -(%d?%d?%d%d)thru%d?%d?%d%d$")
				team, year = team:match("^%s*(.-)%s*$"), tonumber(year)
				
				if year >= 20 and year < 100 then -- Two-digit years were deprecated in 2018
					year = year + 1900
				elseif year < 20 then
					year = year + 2000
				elseif year < 1000 then
					year = nil
				end
			else
				team = mw.ustring.match(team, "^(.-) -%d?%d?%d%dthru%d?%d?%d%d$") or team
			end
		end
		
		if color_data then
			if year and year > 0 then
				--code for handling year parameter
				colors = get_year(color_data[team], year)
			else
				colors = color_data[team]
			end
		end
		
		if ( colors and type(colors) == 'string') then
			if team == colors then year = nil end
			-- follow alias recursively
			return  get_colors (colors, unknown, year)
		end
	end
	
	return colors or unknown
end

local function bordercss(c, w)
	if w > 0 then
		local s = 'inset ' .. w .. 'px ' .. w .. 'px 0 ' .. c 
			.. ', inset -' .. w .. 'px -' .. w .. 'px 0 ' .. c
		return 'box-shadow: ' .. s .. ';'
	else
		return ''
	end
end

local function contrast_check(background, text, colors, alt)
	local c_limit = 3
	local contrast = require('Module:Color_contrast')
	if contrast._ratio({[1] = text, [2] = background, ['error'] = 0}) < c_limit then
		if contrast._ratio({[1] = '#FFFFFF', [2] = background, ['error'] = 0}) >= c_limit then
			text = '#FFFFFF'
		elseif contrast._ratio({[1] = '#000000', [2] = background, ['error'] = 0}) >= c_limit then
			text = '#000000'
		elseif (not alt) and (contrast._ratio({[1] = colors[5], [2] = colors[4], ['error'] = 0}) >= c_limit) then
			background, text = colors[4], colors[5]
		else
			background, text = default[1], default[2]
		end
	end
	return background, text
end

function p.test(frame)
	local args = frame.args.team and frame.args or frame:getParent().args
	local colors = get_colors((args.team or args[1]), nil, args.year)
	return '["' .. args.team .. '"] = {{ "' .. colors[1] .. '", '.. colors[2] ..
		'", '.. colors[3] .. '", '.. colors[4] .. '", '.. colors[5] .. '"}}'
end

function p.color(frame, column, altcolumn)
	local args = frame.args.team and frame.args or frame:getParent().args
	local colors = get_colors((args.team or args[1]), nil, args.year)

	column = (column or tonumber(frame.args.column)) or 1
	altcolumn = altcolumn or tonumber(frame.args.altcolumn)
	if ((not colors[column]) or (colors[column] == '')) and altcolumn then
		column = altcolumn
	end
	
	return (yesno(frame.args.raw) and "" or prefixes[column]) .. colors[column]
end

function p.style(frame)
    local team = frame.args.team or frame.args[1] or frame:getParent().args.team or frame:getParent().args[1]
    local year = frame.args.year or frame:getParent().args.year
    local border = frame.args.border or frame:getParent().args.border
    local alt = yesno(frame.args.alt or frame:getParent().args.alt)
    
    local colors = get_colors(team, nil, year)
    
    local background, text
    if alt then
        background, text = colors[4], colors[5]  -- Alt colors (4 and 5)
    end
    if ((not background) or (background == '')) then
        background = colors[1]  -- Default to primary color (1)
    end
    if ((not background) or (background == '')) then
        background = default[1]  -- Default background color
    end
    if ((not text) or (text == '')) then
        text = colors[2]  -- Default text color (2)
    end
    if ((not text) or (text == '')) then
        text = default[2]  -- Default text color
    end
    
    background, text = contrast_check(background, text, colors, alt)

    -- Add !important to prevent dark mode overrides
    local style = 'background-color: ' .. background .. ' !important; color: ' .. text .. ' !important; '

    -- Apply border based on the argument:
    -- Use the primary color (1) for the border if 'alt' is true, otherwise use the tertiary color (3)
    if tonumber(border) or yesno(border) then
        border = tonumber(border) and border or 2
        local border_color = alt and colors[1] or colors[3]  -- Primary color for 'alt', tertiary otherwise
        style = style .. bordercss(border_color, tonumber(border))
    end

    return style
end

return p
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