Module:Sandbox/Cyborg Coder/Dates

--Cyborg Coder Google Code-in, Lua Task 7 - Date formatting local p = {}

local function leapd(y) if y % 1000 == 0 then return 29 end if y % 100 == 0 then return 28 end if y% 4 == 0 then return 29 end return 28 end

months = { "jan", "feb", "mar", "apr", "may", "jun", "jul", "aug", "sep", "oct", "nov", "dec" } local days_in_month = { 31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } days_in_month[0] = 0 local month_idx = {} for i, v in ipairs(months) do	month_idx[v] = i end

local function day_try(d, m, y)	days_in_month[2] = leapd(y) if d days_in_month[m] then return "Invalid" end return "Valid" end

function p.date(frame) local date = frame.args.text or mw.text.trim(frame.args[1] or "") date = " " .. date local dformat = frame.args.format or "none" if date == "" then date = "No date" end --local d, y = date:match("(%d+)%D+(%d+)") local d = date:match("%D(%d%d)%D") local y = date:match("(%d%d%d+)") local mnth = date:match("%a+") or "" mnth = string.upper(string.sub(mnth, 1, 1)) .. string.sub(mnth, 2) if not months[string.lower(string.sub(mnth, 1, 3))] ~= nil then mnth = date:match("%u%a+") or "" end d, y = tonumber(d) or 1, tonumber(y) or 0 local m = month_idx[mnth:sub(1,3):lower] or tonumber(date:match("%D0(%d)")) or 0 local v = day_try(d, m, y) local out = date .. " = " .. d .. " " .. m .. " " .. y .. " " .. mnth out = out .. " = " .. v	if v == "Invalid" then return out .. " -> Invalid Entry" end out = out .. " -> ".. d .. " " .. mnth .. " " .. y	return out .. " " end

return p