Module:Category series navigation/navyear

local p = {}

function p.navyear(frame)
	--Expects a PAGENAME of the form "Some sequential 2015 example cat", where {{{1}}}=Some sequential, {{{2}}}=2015, {{{3}}}=example cat, 
	--TODO: and an optional 'minumum year' parameter {{{4}}}=1758
	local arg1 = frame.args[1]
	local arg2 = tonumber(frame.args[2])
	local arg3 = frame.args[3]
	return '{| class="toccolours hlist" style="text-align: center; margin: auto;"\n' ..
		'|\n' .. 
		'*'..frame:expandTemplate{ title = 'LinkCatIfExists2', args = { arg1..' '..(arg2-5)..' '..arg3, (arg2-5) } }..'\n' .. 
		'*'..frame:expandTemplate{ title = 'LinkCatIfExists2', args = { arg1..' '..(arg2-4)..' '..arg3, (arg2-4) } }..'\n' .. 
		'*'..frame:expandTemplate{ title = 'LinkCatIfExists2', args = { arg1..' '..(arg2-3)..' '..arg3, (arg2-3) } }..'\n' .. 
		'*'..frame:expandTemplate{ title = 'LinkCatIfExists2', args = { arg1..' '..(arg2-2)..' '..arg3, (arg2-2) } }..'\n' .. 
		'*'..frame:expandTemplate{ title = 'LinkCatIfExists2', args = { arg1..' '..(arg2-1)..' '..arg3, (arg2-1) } }..'\n' .. 
		'*<b>'..arg2..'</b>\n' .. 
		'*'..frame:expandTemplate{ title = 'LinkCatIfExists2', args = { arg1..' '..(arg2+1)..' '..arg3, (arg2+1) } }..'\n' .. 
		'*'..frame:expandTemplate{ title = 'LinkCatIfExists2', args = { arg1..' '..(arg2+2)..' '..arg3, (arg2+2) } }..'\n' .. 
		'*'..frame:expandTemplate{ title = 'LinkCatIfExists2', args = { arg1..' '..(arg2+3)..' '..arg3, (arg2+3) } }..'\n' .. 
		'*'..frame:expandTemplate{ title = 'LinkCatIfExists2', args = { arg1..' '..(arg2+4)..' '..arg3, (arg2+4) } }..'\n' .. 
		'*'..frame:expandTemplate{ title = 'LinkCatIfExists2', args = { arg1..' '..(arg2+5)..' '..arg3, (arg2+5) } }..'\n' .. 
		'|}'
end

return p