Editing Module:D'ni Time

-- THIS IS OBVIOUSLY NOT DONE! DO NOT TOUCH! -Vee

dnitools = require("Module:D'ni Tools")
Date = require('Module:Date')._Date

local p = {}

local args = {}
local origArgs
local root

-- Declare important constants
local refDniHahr = 9647
local msPerHahr = 31556925216
local prorahnteePerHahr = 10 * 29 * 5 * 25 * 25 * 25
local msPerProrahn = msPerHahr / prorahnteePerHahr
local refProrahnteePerHahr = 9647 * 290 * 5 * 25 * 25 * 25

local vaileetee = {"Leefo","Leebro","Leesahn","Leetar","Leevot","Leevofo","Leevobro","Leevosahn","Leevotar","Leenovoo"}
local vaileetee_dnifont = {"lEfo","lEbro","lEsan","lEtar","lEvot","lEvofo","lEvobro","lEvosan","lEvotar","lEnovU"}

local leapSecTimeStamps = {2272060800, 2287785600, 2303683200, 2335219200, 2366755200, 2398291200, 2429913600, 2461449600, 2492985600, 2524521600, 2571782400, 2603318400, 2634854400, 2698012800, 2776982400, 2840140800, 2871676800, 2918937600, 2950473600, 2982009600, 3029443200, 3076704000, 3124137600, 3345062400, 3439756800, 3550089600, 3644697600, 3692217600}
local LeapSecOffset = 10

local function ConvertLeapSecTimeStamps()
-- convert LeapSecTimeStamps from NTP epoch (number of seconds since 1900-01-01 00:00:00)
-- to Unix standard (number of milliseconds since 1970-01-01 00:00:00)

   delta = os.time({year=1900, month=1, day=1, hour=0, min=0})
   for key,value in pairs(leapSecTimeStamps) do
      leapSecTimeStamps[key] = value + delta
   end
end

local function AdjustForLeapSeconds(timestamp)
-- Adjust timestamp for leap seconds
   leapsecs = 0
   for key,value in pairs(leapSecTimeStamps) do
      if timestamp >= value then
         leapsecs = leapsecs + 1
      end
   end
   if leapsecs > 0 then
      leapsecs = leapsecs + (LeapSecOffset - 1)
   end 
   return timestamp + leapsecs
end

local function DejustForLeapSeconds(timestamp)
-- Adjust timestamp for leap seconds the other way
   leapsecs = 0
   for key,value in pairs(leapSecTimeStamps) do
      if timestamp >= value then
         leapsecs = leapsecs + 1
      end
   end
   if leapsecs > 0 then
      leapsecs = leapsecs + (LeapSecOffset - 1)
   end 
   return timestamp - leapsecs
end

local function makeSurfaceTimeStamp(timeStampTable)
-- convert a UTC date-time to a adjusted timestamp
   temp = os.time(timeStampTable)
   return AdjustForLeapSeconds(temp)
end

-- Run conversion of leapseconds and conversion of reference Timestamp here,
-- since these require the above functions to be already declared

ConvertLeapSecTimeStamps()
local refTimeStamp = makeSurfaceTimeStamp({year=1991, month=4, day=21, hour=16, min=54})

local function adjust(dniTime)
-- Ensure DniTime values are within bounds
        while (dniTime['prorahn'] > 25) do
            dniTime['prorahn'] = dniTime['prorahn'] - 25
            dniTime['gorahn'] = dniTime['gorahn'] + 1
        end

        while (dniTime['prorahn'] < 0) do
            dniTime['prorahn'] = dniTime['prorahn'] + 25
            dniTime['gorahn'] = dniTime['gorahn'] - 1
        end

        while (dniTime['gorahn'] > 25) do
            dniTime['gorahn'] = dniTime['gorahn'] - 25;
            dniTime['tahvo'] = dniTime['tahvo'] + 1;
        end

        while (dniTime['gorahn'] < 0) do
            dniTime['gorahn'] = dniTime['gorahn'] + 25
            dniTime['tahvo'] = dniTime['tahvo'] - 1
        end

        while (dniTime['tahvo'] > 25) do
            dniTime['tahvo'] = dniTime['tahvo'] - 25
            dniTime['gahrtahvo'] = dniTime['gahrtahvo'] + 1
        end

        while (dniTime['tahvo'] < 0) do
            dniTime['tahvo'] = dniTime['tahvo'] + 25
            dniTime['gahrtahvo'] = dniTime['gahrtahvo'] - 1
        end

        while (dniTime['gahrtahvo'] > 5) do
            dniTime['gahrtahvo'] = dniTime['gahrtahvo'] - 5
            dniTime['yahr'] = dniTime['yahr'] + 1
        end

        while (dniTime['gahrtahvo'] < 0) do
            dniTime['gahrtahvo'] = dniTime['gahrtahvo'] + 5
            dniTime['yahr'] = dniTime['yahr'] - 1
        end

        while (dniTime['yahr'] > 29) do
            dniTime['yahr'] = dniTime['yahr'] - 29
            dniTime['vailee'] = dniTime['vailee'] + 1
        end

        while (dniTime['yahr'] < 0) do
            dniTime['yahr'] = dniTime['yahr'] + 29
            dniTime['vailee'] = dniTime['vailee'] - 1
        end

        while (dniTime['vailee'] > 9) do
            dniTime['vailee'] = dniTime['vailee'] - 10
            dniTime['hahr'] = dniTime['hahr'] + 1;
        end

        while (dniTime['vailee'] < 0) do
            dniTime['vailee'] = dniTime['vailee'] + 10
            dniTime['hahr'] = dniTime['hahr'] - 1
        end

        return dniTime
end


local function surface2DniTime(surfaceTimeStamp)
-- Given a surfaceTimestamp
-- Return a DniTime (table)
   surface = surface or refTimeStamp

   dniTime = {}

   delta = (surfaceTimeStamp - refTimeStamp) * 1000

   dniTime['hahr'] = math.floor(delta / msPerHahr)

   delta = delta - (dniTime['hahr'] * msPerHahr)

   delta = delta * (prorahnteePerHahr / msPerHahr)

   dniTime['vailee'] = math.floor(delta / (29 * 5 * 25 * 25 * 25))
   delta = delta - (dniTime['vailee'] * (29 * 5 * 25 * 25 * 25))

   dniTime['yahr'] = math.floor(delta / (5 * 25 * 25 * 25))
   delta = delta - (dniTime['yahr'] * (5 * 25 * 25 * 25))

   dniTime['gahrtahvo'] = math.floor(delta / (25 * 25 * 25))
   delta = delta - (dniTime['gahrtahvo'] * (25 * 25 * 25))

   dniTime['tahvo'] = math.floor(delta / (25 * 25))
   delta = delta - (dniTime['tahvo'] * (25 * 25))

   dniTime['gorahn'] = math.floor(delta / 25)
   delta = delta - (dniTime['gorahn'] * 25)

   dniTime['prorahn'] = math.floor(delta)

   dniTime['hahr'] = dniTime['hahr'] + refDniHahr
   dniTime['yahr'] = dniTime['yahr'] + 1

   --return adjust(dniTime)
   return dniTime
end

local function dni2SurfaceTime(dniTime)
-- Given a DniTime (table)
-- Return a surfacteTimestamp
   dniTime = dniTime or {hahr = refDniHahr, vailee = 0, yahr = 1, gahrtahvo = 0, tahvo = 0, gorahn = 0, prorahn = 0}

   dniTime = adjust(dniTime)

   dTimeInProrahntee = dniTime['prorahn'] + (dniTime['gorahn'] * 25) + (dniTime['tahvo'] * 25 * 25) + (dniTime['gahrtahvo'] * 25 * 25 * 25) + ((dniTime['yahr'] - 1) * 5 * 25 * 25 * 25) + ((dniTime['vailee']) * 29 * 5 * 25 * 25 * 25) + (dniTime['hahr'] * 290 * 5 * 25 * 25 * 25)

   dTimeDelta = refProrahnteePerHahr - dTimeInProrahntee 
   
   dTimeDelta = dTimeDelta * msPerProrahn

   dTimeDelta = (refTimeStamp * 1000) - dTimeDelta

   surfaceTimestamp = DejustForLeapSeconds(dTimeDelta/1000)

   return os.date("*t",surfaceTimestamp)
end

-- ========Parse Functions========

-- Much of this code derived from https://help.interfaceware.com/code/details/dateparse-lua

-- Create index table for vailee
if true then
   local function index_by_name(array)
      local dict = {}
      for i,name in pairs(array) do
         name = name:lower()
         dict[name] = i - 1
      end
      return dict
   end
   vailee_by_name = index_by_name(vaileetee)
end

-- Given string s, return name of vailee
local function lookup_vailee(s)
   local vailee = vailee_by_name[s:lower()]
   if not vailee then error('expected vailee, got "'..s..'"') end
   return vailee
end

local function fix_hahr(BE,DE)
   return function(s,d)
             if s:upper() == BE then
                d.hahr = - math.abs(d.hahr)
             elseif s:upper() == DE then
                d.hahr = math.abs(d.hahr)
             else
                error('expected '..BE..' or '..DE..', got "'..s..'"')
             end
          end
end

--Just returns a number (serves as 'default' for function table)
local function parseint(s)
   return tonumber(s)
end
 
-- Possible codes in Dni format string, with associated patterns and functions. 
-- The default function is parseint(), since most values are just integers, exactly 
-- as we need them.
local fmt_details = {
   hhhh = { '%d%d%d%d', 'hahr' };
   v    = { '%d+',    'vailee' };
   vv   = { '%d%d',   'vailee' };
   vvvv = { '%a+', 'vailee', lookup_vailee }; 
   y    = { '%d+',  'yahr' };
   yy   = { '%d%d', 'yahr' };
   g    = { '%d+',  'gahrtahvo' };
   gg   = { '%d%d', 'gahrtahvo' };
   t    = { '%d+',  'tahvo' };
   tt   = { '%d%d', 'tahvo' };
   r    = { '%d+',  'gorahn' };
   rr   = { '%d%d', 'gorahn' };
   p    = { '%d+',  'prorahn' };
   pp   = { '%d%d', 'prorahn' };
   xx   = { '%a%a', 'BE or DE', fix_hahr('BE','DE') };
   [' '] = { '%s*', 'whitespace' }; -- Allow omission.
   [','] = { '%s*,?', 'a comma' };  -- Allow omission and leading whitespace.
   w     = { '%a+', 'a word' };     -- Value ignored.
   n     = { '%d+', 'a number' };   -- Value ignored.
}
 
-- Splits one part of a format string off; returns that and the rest.
local function split_fmt(fmt)
   local c = fmt:match('^(%a)')
   if c then
      return fmt:match('^('..c..'+)(.*)')
   elseif #fmt > 0 then
      return fmt:sub(1,1), fmt:sub(2)
   end
end
 

local function parseDniDateStr(s, fmt)
-- Parses the string, s, according to the format, fmt.

   fmt = fmt or "hhhh vvvv y g:t:r:p"

   local matched, d = '', {hahr=1,yahr=1,vailee=0,gahrtahvo=0,tahvo=0,gorahn=0,prorahn=0} --Sets default
   local function fail(what, pattern) --Error msg function
      if pattern then what = what..' ('..pattern..')' end
      if matched ~= '' then what = what..' after "'..matched..'"' end
      error('expected '..what..', got "'..s..'"')
   end
   while fmt ~= '' do
      local head_fmt, rest_fmt = split_fmt(fmt)
      local pattern, field, fun = unpack(fmt_details[head_fmt] or {})
      local part, rest
      if pattern then
         part, rest = s:match('^('..pattern..')(.*)')
         if not part then fail(field,head_fmt) end
         d[field] = (fun or parseint)(part,d)
         matched = matched .. part
      elseif head_fmt:find('^%a') then
         error('unknown date/time pattern: '..head_fmt)
      elseif s:sub(1,#head_fmt) ~= head_fmt then
         fail('"'..head_fmt..'"')
      else
         matched = matched .. s:sub(1,#head_fmt)
         rest = s:sub(#head_fmt + 1)
      end
      s, fmt = rest, rest_fmt
   end
   if s ~= '' then fail('nothing') end
   return d
end


-- ==========Display Functions=========

local function getVaileeName(vailee, useDniFont)
-- Return name of vailee given number (zero-indexed)
-- If useDniFont is true, return it in Dnifont text 

    useDniFont = useDniFont or false

    if(useDniFont) then
       return vaileetee_dnifont[vailee+1]
    else
       return vaileetee[vailee+1]
    end
end

local function displayDniTime(dniTime)
-- Return dniTime (table) as string of table

   return '{'..'hahr = '..dniTime['hahr']..', vailee = '..dniTime['vailee']..', vaileeName = '..getVaileeName(dniTime['vailee'])..', yahr = '..dniTime['yahr']..', gahrtahvo = '..dniTime['gahrtahvo']..', tahvo = '..dniTime['tahvo']..', gorahn = '..dniTime['gorahn']..', prorahn = '..dniTime['prorahn']..'}'

end

local function displaySurfaceTime(surface)
-- Return surfaceTime (table) as string of table

   return '{'..'year = '..surface['year']..', month = '..surface['month']..', day = '..surface['day']..', hour = '..surface['hour']..', min = '..surface['min']..', sec = '..surface['sec']..', isdst = '..tostring(surface['isdst'])..'}'
end

local function formatSurfaceTime(surfaceTime,format)

   format = format or 'c'
 
   lang = mw.getContentLanguage()

   return lang:formatDate(format,"@"..makeSurfaceTimeStamp(surfaceTime))
--   return lang:formatDate(format,tostring(surfaceTime['year'])..'-'..tostring(surfaceTime['month'])..'-'..tostring(surfaceTime['day'])..' '..tostring(surfaceTime['hour'])..':'..tostring(surfaceTime['min'])..':'..tostring(surfaceTime['sec']))
end

local function formatDniTime(dniTime,format)
-- Given a DniTime (table), returns formatted string.
-- format is a string with patterns for parts of the date, like standard dates
-- Patterns in capitals padded with zeroes
-- HHHH, hhhh = hahr (4-digits, Uppercase includes +/-)
-- hh = last two digits of the hahr
-- XX = 'era' (BE or DE)
-- VVVV = vailee by name
-- VV,vv = vailee (1 indexed)
-- YY, yy = yahr
-- GG, gg = gahrtahvo
-- TT, tt = tahvo
-- RR, rr = gorahnn
-- PP, pp = prorahn

   format = format or "HHHH XX VVVV yy gg:tt:rr:pp"

   result = format

   if (dniTime['hahr'] < 0) then 
       era = "BE"
       sign = "-" 
   else 
       era = "DE"
       sign = "" 
   end

result = string.gsub(result,"%a+", {
                               ["dHHHH"] = dnitools._num2dnifont(math.abs(dniTime['hahr']),4),
                               ["HHHH"] = string.format("%04d",tostring(math.abs(dniTime['hahr']))),
                               ["dhhhh"] = dnitools._num2dnifont(math.abs(dniTime['hahr'])),
                               ["hhhh"] = math.abs(dniTime['hahr']),
                               ["dhh"] = dnitools._num2dnifont(string.sub(dniTime['hahr'],-2)),
                               ["hh"] = string.sub(dniTime['hahr'],-2),
                               ["dYY"] = dnitools._num2dnifont(dniTime['yahr'],2),
                               ["YY"] = string.format("%02d",tostring(dniTime['yahr'])),
                               ["dyy"] = dnitools._num2dnifont(dniTime['yahr']),
                               ["yy"] = dniTime['yahr'],
                               ["dVVVV"] = getVaileeName(dniTime['vailee'],true),
                               ["VVVV"] = getVaileeName(dniTime['vailee']),
                               ["VV"] = string.format("%02d",tostring(dniTime['vailee']+1)),
                               ["dvv"] = dnitools._num2dnifont(dniTime['vailee'] + 1),
                               ["vv"] = dniTime['vailee'] + 1,
                               ["GG"] = string.format("%02d",tostring(dniTime['gahrtahvo'])),
                               ["dgg"] = dnitools._num2dnifont(dniTime['gahrtahvo']),
                               ["gg"] = dniTime['gahrtahvo'],
                               ["TT"] = string.format("%02d",tostring(dniTime['tahvo'])),
                               ["dtt"] = dnitools._num2dnifont(dniTime['tahvo']),
                               ["tt"] = dniTime['tahvo'],
                               ["RR"] = string.format("%02d",tostring(dniTime['gorahn'])),
                               ["drr"] = dnitools._num2dnifont(dniTime['gorahn']),
                               ["rr"] = dniTime['gorahn'],
                               ["PP"] = string.format("%02d",tostring(dniTime['prorahn'])),
                               ["pp"] = dniTime['prorahn'],
                               ["dpp"] = dnitools._num2dnifont(dniTime['prorahn']),
                               ["XX"] = era,
                               ["X"] = sign,
})

   return result

end


-- =============================================================================

local function preprocessSingleArg(argName)
    -- If the argument exists and isn't blank, add it to the argument table.
    -- Blank arguments are treated as nil to match the behaviour of ParserFunctions.
    if origArgs[argName] and origArgs[argName] ~= '' then
        args[argName] = origArgs[argName]
    end
end

function p.surface2dni(frame)
    -- If called via #invoke, use the args passed into the invoking template.
    -- Otherwise, for testing purposes, assume args are being passed directly in.
    if frame == mw.getCurrentFrame() then
        origArgs = frame:getParent().args
    else
        origArgs = frame
    end

    output = ""
    
    preprocessSingleArg('datetime')
    preprocessSingleArg('format')
    
    if args['datetime'] then
       surfaceTime = require("Module:D'ni Time/surface").parseSurfaceDateStr(args['datetime'])
       output = formatDniTime(surface2DniTime(makeSurfaceTimeStamp(surfaceTime)),args['format'])
    else 
       preprocessSingleArg('year')
       preprocessSingleArg('month')  
       preprocessSingleArg('day') 
       preprocessSingleArg('hour') 
       preprocessSingleArg('minute') 
       preprocessSingleArg('second') 

       -- Parse the data parameters
       surface = {year = args['year'], month = args['month'], day = args['day'], hour = args['hour'], min = args['minute'], sec = args['second']}

--      return displaySurfaceTime(surface)
       output = formatDniTime(surface2DniTime(makeSurfaceTimeStamp(surface)),args['format'])
     end
     return output
end

function p.dni2surface(frame)
    -- If called via #invoke, use the args passed into the invoking template.
    -- Otherwise, for testing purposes, assume args are being passed directly in.
    if frame == mw.getCurrentFrame() then
        origArgs = frame:getParent().args
    else
        origArgs = frame
    end

    preprocessSingleArg('datetime')
    preprocessSingleArg('format')
    preprocessSingleArg('input')

    if args['datetime'] then
       output = formatSurfaceTime(dni2SurfaceTime(parseDniDateStr(args['datetime'],args['input'])),args['format'])
    else 
      preprocessSingleArg('hahr')
      preprocessSingleArg('vailee')  
      preprocessSingleArg('yahr') 
      preprocessSingleArg('gahrtahvo') 
      preprocessSingleArg('tahvo') 
      preprocessSingleArg('gorahn')
      preprocessSingleArg('prorahn') 

      -- Parse the data parameters
      dni = {hahr = tonumber(args['hahr']), vailee = tonumber(args['vailee']), yahr = tonumber(args['yahr']), gahrtahvo = tonumber(args['gahrtahvo']), tahvo = tonumber(args['tahvo']), gorahn = tonumber(args['gorahn']), prorahn = tonumber(args['prorahn'])}

--      output =  displaySurfaceTime(dni2SurfaceTime(dni),args['format'])
      output = formatSurfaceTime(dni2SurfaceTime(dni),args['format'])
    end
    
    return output

end

function p.test(frame)
    -- If called via #invoke, use the args passed into the invoking template.
    -- Otherwise, for testing purposes, assume args are being passed directly in.
    if frame == mw.getCurrentFrame() then
        origArgs = frame:getParent().args
    else
        origArgs = frame
    end
    
    -- Parse the data parameters
    
    lang = mw.getContentLanguage()

    surface = {year = -7658, month = 5, day = 31, hour = 6, min = 56, sec = 58, isdst = true}
    dni = {hahr = -1, vailee = 1, yahr = 1, gahrtahvo = 1, tahvo = 1, gorahn = 1, prorahn = 1}

    output = ""
    output = output .. "<br/>"..require("Module:D'ni Time/surface").displaySurfaceTime(surface)
--    output = output .. "<br/>"..require("Module:D'ni Time/dni").displayDniTime(surface2DniTime(makeSurfaceTimeStamp(surface)))
    output = output .. "<br/>"..require("Module:D'ni Time/dni").formatDniTime(surface2DniTime(makeSurfaceTimeStamp(surface)))
    output = output .. "<br/>"..require("Module:D'ni Time/dni").displayDniTime(dni)
    output = output .. "<br/>"..require("Module:D'ni Time/dni").displaySurfaceTime(dni2SurfaceTime(dni))
    output = output .. "<br/>"..os.date("ghdd",makeSurfaceTimeStamp(surface))
--    output = output .. "<br/>"..formatSurfaceTime(surface,args['format'])
--    output = output .. "<br/>"..makeSurfaceTimeStamp(surface)
--    output = output .. "<br/>"..lang:formatDate("c","@"..makeSurfaceTimeStamp(surface))


    return output
end

return p