Module:HGSeason

Documentation for this module may be created at Module:HGSeason/doc

local p = {}

local seasons = { 
	['Nascency'] = 0, 
	['Excess'] = 1, 
	['Dares'] = 2, 
	['Devotions'] = 3, 
	['Irreverences'] = 4, 
	['Duplicities'] = 5
}

local function first_tuesday(year, month)
	local day = 1
	while tonumber(os.date("%w", os.time{year=year, month=month, day=day})) ~= 2 do
		day = day + 1
	end
	return day
end

local function add_months(year, month, plus)
	month = month + plus
	if month > 12 then return year+1, month-12 end
	return year, month
end

function p.hgseason(frame)
	local current_season = frame.args[1]
	local future_season = frame.args[2]
	local offset = (seasons[future_season] - seasons[current_season]) % 6
	
	local year, month = add_months(tonumber(os.date("%Y")), tonumber(os.date("%m")), offset)
	local year2, month2 = add_months(year, month, 1)
	return os.date("%Y %b %d", os.time{year=year, month=month, day=first_tuesday(year, month)}) .. ' - ' .. os.date("%Y %b %d", os.time{year=year2, month=month2, day=first_tuesday(year2, month2)})
end

return p