Module:FBI QR codes

Documentation for this module may be created at Module:FBI QR codes/doc

local args = {}

local p = {}

-- from [[Module:Infobox]]
-- Returns the union of the values of two tables, as a sequence.
local function union(t1, t2)

	local vals = {}
	for k, v in pairs(t1) do
		vals[v] = true
	end
	for k, v in pairs(t2) do
		vals[v] = true
	end
	local ret = {}
	for k, v in pairs(vals) do
		table.insert(ret, k)
	end
	return ret
end

-- from [[Module:Infobox]]
-- Returns a table containing the numbers of the arguments that exist
-- for the specified prefix. For example, if the prefix was 'data', and
-- 'data1', 'data2', and 'data5' exist, it would return {1, 2, 5}.
local function getArgNums(prefix)
	local nums = {}
	for k, v in pairs(args) do
		local num = tostring(k):match('^' .. prefix .. '([1-9]%d*)$')
		if num then table.insert(nums, tonumber(num)) end
	end
	table.sort(nums)
	return nums
end

function p.makeSections(frame)
	local sections = {}
	local nums = union(getArgNums('name'), getArgNums('url'))
	
	for k, v in ipairs(nums) do
		local name = args['name' .. tostring(num)]
		local url = args['name' .. tostring(num)]
		if name and url then
			local qr = frame:callParserFunction('#qrlite', {url, format = 'svg', margin = '3'})
			table.insert(sections, {name, qr..frame:preprocess('<br>['..url..' '..url..']')})
		end
	end
	
	return sections
end

function p.makeTabber(sections)
	local tabber = mw.html.create('tabber')
	
	for k, v in ipairs(sections) do
		tabber:wikitext('|-|'..v[1]..'=\n\n', v[2])
	end
	
	return tostring(tabber)
end

function p.main(frame)
	local parent = frame:getParent()
	
	-- adapted from [[Module:Infobox]]
	if frame == mw.getCurrentFrame() then
		args = frame:getParent().args
	else
		args = frame
	end

	local sections = p.makeSections(parent)
	return p.makeTabber(sections)
end

return p