Module:DatesWD/sandbox explained

local p = local bool_to_number=local getArgs = require('Module:Arguments').getArgslocal err = "-"

local function purif(str) if str

"" or str

nil then return nil elseif tonumber(str) then return math.floor(tonumber(str)) else return nil end -- need .5 --,5 number format converter?end

local function inbord(val, down, up) return not (type(up) ~= "number" or type(down) ~= "number" or type(val) ~= "number" or up < down or val < down or val > up)end

local function isdate (chain) return (type(chain

"table") and inbord(chain.year,-9999,9999) and inbord(chain.month,1,12) and inbord(chain.day,1,31))-- more detailed check for 31.02.0000 needed-- check for other calendars neededend

local function numstr2date(datein) local nums = local dateout = for num in string.gmatch(datein,"(%d+)") do table.insert(nums,purif(num)) end if #nums ~= 3 then error("Wrong format: 3 numbers expected") elseif not inbord(nums[2],1,12) then error("Wrong month") elseif not inbord(nums[3],1,31) then dateout = elseif not inbord(nums[1],1,31) then dateout = else-- local lang = mw.getContentLanguage-- implement lang:formatDate(format,datein,true) here return error("Unable to recognize date") end return dateoutend

local function date2str(datein) if not isdate(datein) then return error("Wrong date") end local dateout = os.date("%Y-%m-%d", os.time(datein)) return dateoutend

function gri2jd(datein) if not isdate(datein) then return error("Wrong date") end local year = datein.year local month = datein.month local day = datein.day -- jd calculation local a = math.floor((14 - month)/12) local y = year + 4800 - a local m = month + 12*a - 3 local offset = math.floor(y/4) - math.floor(y/100) + math.floor(y/400) - 32045 local jd = day + math.floor((153*m + 2)/5) + 365*y + offset -- jd validation local low, high = -1931076.5, 5373557.49999 if not (low <= jd and jd <= high) then return error("Wrong date") end return jdend

function jd2jul(jd) if type(jd) ~= "number" then return error("Wrong jd") end -- calendar date calculation local c = jd + 32082 local d = math.floor((4*c + 3)/1461) local e = c - math.floor(1461*d/4) local m = math.floor((5*e + 2)/153) local year_out = d - 4800 + math.floor(m/10) local month_out = m + 3 - 12*math.floor(m/10) local day_out = e - math.floor((153*m + 2)/5) + 1 -- output local dateout = return dateoutend

function jul2jd(datein) if not isdate(datein) then return error("Wrong date") end local year = datein.year local month = datein.month local day = datein.day -- jd calculation local a = math.floor((14 - month)/12) local y = year + 4800 - a local m = month + 12*a - 3 local offset = math.floor(y/4) - 32083 local jd = day + math.floor((153*m + 2)/5) + 365*y + offset -- jd validation local low, high = -1930999.5, 5373484.49999 if not (low <= jd and jd <= high) then return error("Wrong date") end return jdend

function jd2gri(jd) -- calendar date calculation local a = jd + 32044 local b = math.floor((4*a + 3) / 146097) local c = a - math.floor(146097*b/4) local d = math.floor((4*c+3)/1461) local e = c - math.floor(1461*d/4) local m = math.floor((5*e+2)/153) local day_out = e - math.floor((153*m+2)/5)+1 local month_out = m + 3 - 12*math.floor(m/10) local year_out = 100*b + d - 4800 + math.floor(m/10) -- output local dateout = return dateoutend

-- =p.NthDay(mw.getCurrentFrame:newChild)

function p.NthDay(frame) local args = getArgs(frame,) local num, wday, mont, yea, format = purif(args[1]), purif(args[2]), purif(args[3]), purif(args[4]), args[5] if not format then format = "%Y-%m-%d" end if not inbord(num,-5,5) then return error("The number must be between -5 and 5") elseif num

0 then return error("The number must not be zero") end if not inbord(wday,0,6) then return error("The day of the week must be between 0 and 6") end if not inbord(mont,1,12) then return error("The month must be between 1 and 12") end if not inbord(yea,0,9999) then return error("Wrong year number") end if inbord(num,1,5) then local m_start = os.time local m_wds = tonumber(os.date("%w", m_start)) local start_shift = ((num - bool_to_number[wday >= m_wds]) * 7 - (m_wds - wday)) * 24 * 60 * 60 local tim = m_start + start_shift if tonumber(os.date("%m", tim))

mont then return (os.date(format, tim)) else return (err) end elseif inbord(num,-5,-1) then local m_end = os.time - 24 * 60 * 60 local m_wde = tonumber(os.date("%w", m_end)) local end_shift = ((math.abs(num + 1) + bool_to_number[wday > m_wde]) * 7 + (m_wde - wday)) * 24 * 60 * 60 local tim = m_end - end_shift if tonumber(os.date("%m", tim))

mont then return (os.date(format, tim)) else return (err) end endend

-- =p.test(mw.getCurrentFrame:newChild)

function p.test(frame) local args = getArgs(frame,) local input = args[1] if not input then return "" else local datetest = numstr2date(input) if isdate(datetest) then strout = datetest.day .. "." .. datetest.month .. "." .. datetest.year .. " = " .. gri2jd(datetest) return strout else error("Not a date") end end error("You shouldn't read this too")end

return p