imported>Carn at 15:04, 10 January 2020

2020-01-10T15:04:41Z

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local p = {}
local bool_to_number={ [true]=1, [false]=0 }
local getArgs = require('Module:Arguments').getArgs
local err = "-"

local function purif(str)
if str == "" or str == nil then
return nil
elseif type(tonumber(str)) == "number" then
return math.floor(tonumber(str))
else
return nil
end
-- need .5 -- ,5 number format converter?
end

local function inbord(val, down, up)
if type(up) ~= "number" or type(down) ~= "number" or type(val) ~= "number" or up < down or val < down or val > up then
return false
else
return true
end
end

local function isdate ( chain )
if (not type(chain) == "table")
or (not inbord(chain.year,-9999,9999))
or (not inbord(chain.month,1,12))
or (not inbord(chain.day,1,31))
then return false
else return true end
-- more detailed check for 31.02.0000 needed
-- check for other calendars needed
end

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 = {["year"]=nums[3], ["month"]=nums[2], ["day"]=nums[1]}
elseif not inbord(nums[1],1,31) then
dateout = {["year"]=nums[1], ["month"]=nums[2], ["day"]=nums[3]}
else
-- local lang = mw.getContentLanguage()
-- implement lang:formatDate(format,datein,true) here
return error("Unable to recognize date")
end
return dateout
end

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 dateout
end

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 jd
end

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 = {["year"]=year_out, ["month"]=month_out, ["day"]=day_out}
return dateout
end

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 jd
end

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 = {["year"]=year_out, ["month"]=month_out, ["day"]=day_out}
return dateout
end

-- =p.NthDay(mw.getCurrentFrame():newChild{title="1",args={"1","1","1","2020","%Y-%m-%d"}})

function p.NthDay( frame )
local args = getArgs(frame, { frameOnly = true })
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{year=yea, month=mont, day=1, hour=0}
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{year = yea, month = mont + 1, day = 1, hour = 0} - 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
end
end

-- =p.test(mw.getCurrentFrame():newChild{title="1",args={"1.1.2020"}})

function p.test(frame)
local args = getArgs(frame, { frameOnly = true })
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

Module:DatesWD - Revision history

imported>Carn at 15:04, 10 January 2020