--[[  __ __ _ _ ____ _ _  | \/ | ___ __| |_ _| | ___ _ / ___|___ _ __ ___ _ __ | | _____ __ __| | __ _| |_ ___   | |\/| |/ _ \ / _` | | | | |/ _ (_) | / _ \| '_ ` _ \| '_ \| |/ _ \ \/ / / _` |/ _` | __/ _ \  | | | | (_) | (_| | |_| | | __/_| |__| (_) | | | | | | |_) | | __/> < | (_| | (_| | || __/  |_| |_|\___/ \__,_|\__,_|_|\___(_)\____\___/|_| |_| |_| .__/|_|\___/_/\_\ \__,_|\__,_|\__\___|  |_|  This module is intended for creation of complex date phrases in variety of languages.  Once deployed, please do not modify this code without applying the changes first at Module:Complex date/sandbox and testing at Module:Complex date/sandbox/testcases.  Authors and maintainers: * User:Sn1per - first draft of the original version * User:Jarekt - corrections and expansion of the original version ]]  -- List of external modules and functions local p = {Error = nil} local i18n = require('Module:i18n/complex date') -- used for translations of date related phrases local ISOdate = require('Module:ISOdate')._ISOdate -- used for parsing dates in YYYY-MM-DD and related formats local Calendar -- loaded lazily  -- ================================================== -- === Internal functions =========================== -- ==================================================  local function langSwitch(list,lang)  local langList = mw.language.getFallbacksFor(lang)  table.insert(langList,1,lang)  table.insert(langList,math.max(#langList,2),'default')  for i,language in ipairs(langList) do  if list[language] then  return list[language]  end  end end  -- ================================================== local function formatnum1(numStr, lang) -- mostly require('Module:Formatnum').formatNum function used to translate a number to use different numeral characters, -- except that it it does not call that function unless the language is on the list "LList"  local LList = {bn=1,bpy=1,kn=1,hi=1,mr=1,new=1,pa=1,gu=1,fa=1,glk=1,mzn=1,ur=1,ar=1,ckb=1,ks=1,lo=1,['or']=1,bo=1,['ml-old']=1,mn=1,te=1,th=1}  if LList[lang] then -- call only when the language is on the list  numStr = require('Module:Formatnum').formatNum(numStr, lang, 1)  end  return numStr end  -- ================================================== local function getISODate(datestr, datetype, lang, num, case) -- translate dates in the format YYYY, YYYY-MM, and YYYY-MM-DD  if not case and i18n.Translations[datetype] then  -- look up the grammatical case needed and call ISOdate module  local rec = langSwitch(i18n.Translations[datetype], lang)  if type(rec)=='table' then  case = rec.case[num]  end  end  return ISOdate(datestr, lang, case, '', 1) end  -- ======================================================================= local function translatePhrase(date1, date2, operation, lang, state) -- use tables in Module:i18n/complex date to translate a phrase  if not i18n.Translations[operation] then  p.Error = string.format('<span style="background-color:red;">Error in [[Module:Complex date]]: input parameter "%s" is not recognized.</span>', operation or 'nil')  return ''  end  local dateStr = langSwitch(i18n.Translations[operation], lang)  if type(dateStr)=='table' then  dateStr = dateStr[1]  end  if type(dateStr)=='function' then  local dateFunc = dateStr  local nDates = i18n.Translations[operation]['nDates']  if nDates==2 then -- 2 date phrase  dateStr = dateFunc(date1, date2, state)  else -- 1 date phrase  dateStr = dateFunc(date1, state)  end  end   if type(dateStr)=='string' then  -- replace parts of the string '$date1' and '$date2' with date1 and date2 strings  dateStr = mw.ustring.gsub(dateStr, '$date1', date1)  dateStr = mw.ustring.gsub(dateStr, '$date2', date2)  else  -- Special case of more complex phrases that can be build out of simple phrases  -- If complex case is not translated to "lang" than build it out of simpler ones  local x = dateStr  dateStr = p._complex_date(x.conj, x.adj1, date1, x.units1, x.era1, x.adj2, date2, x.units2, x.era2, lang, 2)  end  return dateStr end  -- ======================================================================= local function oneDatePhrase(dateStr, adj, era, units, lang, num, case, state) -- translate a single date phrase  if num==2 then  state.adj, state.era, state.units, state.precision = state.adj2, state.era2, state.units2, state.precision2  end   -- dateStr can have many forms: ISO date, year or a number for  -- decade, century or millennium  if units == '' then -- unit is "year", "month", "day"  dateStr = getISODate(dateStr, adj, lang, num, case)  else -- units is "decade", "century", "millennium''  dateStr = translatePhrase(dateStr, '', units, lang, state)  end   -- add adjective ("early", "mid", etc.) or preposition ("before", "after",  -- "circa", etc.) to the date  if adj ~= '' then  dateStr = translatePhrase(dateStr, '', adj, lang, state)  else -- only era?  dateStr = formatnum1(dateStr, lang)  end   -- add era  if era ~= '' then  dateStr = translatePhrase(dateStr, '', era, lang, state)  end  return dateStr end  -- ======================================================================= local function twoDatePhrase(date1, date2, state, lang) -- translate a double date phrase  local dateStr, case  local era=''  if state.era1 == state.era2 then  -- if both eras are the same than add it only once  era = state.era1  state.era1 = ''  state.era2 = ''  end  case = {nil, nil}  if i18n.Translations[state.conj] then  local rec = langSwitch(i18n.Translations[state.conj], lang)  if type(rec)=='table' then  case = rec.case  end  end  date1 = oneDatePhrase(date1, state.adj1, state.era1, state.units1, lang, 1, case[1], state)  date2 = oneDatePhrase(date2, state.adj2, state.era2, state.units2, lang, 2, case[2], state)  dateStr = translatePhrase(date1, date2, state.conj, lang, state)  if era ~= '' then  dateStr = translatePhrase(dateStr, '', era, lang, state)  end  return dateStr end  -- ======================================================================= local function otherPhrases(date1, date2, operation, era, lang, state) -- translate specialized phrases  local dateStr = ''   if operation == 'islamic' then  if date2=='' then date2 = mw.getCurrentFrame():callParserFunction('#time', 'xmY', date1) end  date1 = getISODate(date1, operation, lang, 1, nil)  date2 = getISODate(date2, operation, lang, 2, nil)  if era == '' then era = 'ad' end  dateStr = translatePhrase(date1, '', era, lang, state) .. ' (' .. translatePhrase(date2, '', 'ah', lang, state) .. ')'  era = ''  elseif operation == 'julian' then  if not date2 and date1 then -- Convert from Julian to Gregorian calendar date  if Calendar == nil then  Calendar = require("Module:Calendar") -- lazy loding (only if needed)  end  local JDN = Calendar._date2jdn(date1, 0)  if JDN then  date2 = date1 -- first date is assumed to be Julian  date1 = Calendar._jdn2date(JDN, 1)  end  end  date1 = getISODate(date1, operation, lang, 1, nil)  date2 = getISODate(date2, operation, lang, 2, nil)  dateStr = translatePhrase(date1, date2, operation, lang, state)  dateStr = mw.ustring.gsub(mw.ustring.gsub(dateStr, '%( ', '('), ' %)', ')') -- in case date2 is empty  elseif operation == 'turn of the year' or operation == 'turn of the decade' or operation == 'turn of the century' then  local dt = 1  if operation == 'turn of the decade' then dt=10 end  if not date2 or date2=='' then date2=tostring(tonumber(date1)-dt) end  if era~='bp' and era~='bc' then date1, date2 = date2, date1 end  if operation == 'turn of the year' then  date1 = ISOdate(date1, lang, '', '', 1)  date2 = ISOdate(date2, lang, '', '', 1)  else  date1 = formatnum1(date1, lang)  date2 = formatnum1(date2, lang)  end  dateStr = translatePhrase(date1, date2, operation, lang, state)  elseif operation == 'year unknown' then  dateStr = translatePhrase('', '', operation, lang, state) .. '<div style="display: none;">Unknown date</div>'  elseif operation == 'unknown' then  dateStr = tostring(mw.message.new( "exif-unknowndate" ):inLanguage( lang )) .. '<div style="display: none;">Unknown date</div>'  end   -- add era  if era ~= '' then  dateStr = translatePhrase(dateStr, '', era, lang, state)  end  return dateStr end  -- ======================================================================= local function checkAliases(str1, str2, sType) -- some inputs have many aliases - reconcile them and ensure string is playing a proper role   local out = ''  if str1 and str1~='' then  local a = i18n.Synonyms[str1] -- look up synonyms of "str1"  if a then  out = a[1]  else  p.Error = string.format('<span style="background-color:red;">Error in [[Module:Complex date]]: %s is not recognized.</span>', str1)  end  elseif str2 and str2~='' then -- if "str1" of type "sType" is empty than maybe ...  local a = i18n.Synonyms[str2] -- ..."str2" is of the same type and is not empty  if a and a[2]==sType then  out = a[1]  str2 = ''  end  end  return out, str2 end  -- ======================================================================= local function datePrecision(dateStr, units) -- "in this module "Units" is a string like millennium, century, or decade -- "precision" is wikibase compatible date precision number: 6=millennium, 7=century, 8=decade, 9=year, 10=month, 11=day -- based on string or numeric input calculate "Units" and "precision"  local precision  if type(units)=='number' then  precision = units  if precision>11 then precision=11 end -- clip the range of precision values  if precision==6 then units='millennium'  elseif precision==7 then units='century'  elseif precision==8 then units='decade'  else units = ''  end  elseif type(units)=='string' then  units = string.lower(units)  if units=='millennium' then precision=6  elseif units=='century' then precision=7  elseif units=='decade' then precision=8  else precision=9  end  end  if units=='' or precision==9 then  local sLen = mw.ustring.len(dateStr)  if sLen<= 4 then precision=9  elseif sLen== 7 then precision=10  elseif sLen>=10 then precision=11  end  units=''  end  if precision==6 and dateStr.match( dateStr, '%d000' )~=nil then  dateStr = tostring(math.floor(tonumber(dateStr)/1000) +1)  elseif precision==7 and mw.ustring.match( dateStr, '%d%d00' )~=nil then  dateStr = tostring(math.floor(tonumber(dateStr)/100) +1)  end   return dateStr, units, precision end  -- ======================================================================= local function isodate2timestamp(dateStr, precision, era) -- convert date string to timestamps used by Quick Statements  local tStamp = nil  if era == 'ah' or precision<6 then  return nil  elseif era ~= '' then  local eraLUT = {ad='+', bc='-', bp='-' }  era = eraLUT[era]  else  era='+'  end  -- convert isodate to timestamp used by quick statements  if precision>=9 then  if string.match(dateStr,"^%d%d%d%d$") then -- if YYYY format  tStamp = era .. dateStr .. '-00-00T00:00:00Z/9'  elseif string.match(dateStr,"^%d%d%d%d%-%d%d$") then -- if YYYY-MM format  tStamp = era .. dateStr .. '-00T00:00:00Z/10'  elseif string.match(dateStr,"^%d%d%d%d%-%d%d%-%d%d$") then -- if YYYY-MM-DD format  tStamp = era .. dateStr .. 'T00:00:00Z/11'  end  elseif precision==8 then -- decade  tStamp = era .. dateStr .. '-00-00T00:00:00Z/8'  elseif precision==7 then -- century  local d = tostring(tonumber(dateStr)-1)  tStamp = era .. d .. '50-00-00T00:00:00Z/7'  elseif precision==6 then  local d = tostring(tonumber(dateStr)-1)  tStamp = era .. d .. '500-00-00T00:00:00Z/6'  end   return tStamp end  -- ======================================================================= local function oneDateQScode(dateStr, adj, era, precision) -- create QuickStatements string for "one date" dates  local outputStr = ''   local d = isodate2timestamp(dateStr, precision, era)  if not d then  return ''  end  local rLUT = { early='Q40719727' , mid='Q40719748', late='Q40719766',  ['1quarter']='Q40690303' , ['2quarter']='Q40719649' , ['3quarter']='Q40719662', ['4quarter']='Q40719674',  spring='Q40720559' , summer='Q40720564' , autumn='Q40720568' , winter='Q40720553',  firsthalf='Q40719687', secondhalf='Q40719707' }  local qLUT = {['from']='P580', ['until']='P582', ['after']='P1319', ['before']='P1326', ['by']='P1326'}   local refine = rLUT[adj]  local qualitier = qLUT[adj]   if adj=='' then  outputStr = d  elseif adj=='circa' then  outputStr = d..",P1480,Q5727902"  elseif refine then  outputStr = d..",P4241,"..refine  elseif precision>7 and qualitier then  local century = string.gsub(d, 'Z%/%d+', 'Z/7')  outputStr = century ..",".. qualitier ..","..d  end  return outputStr end  -- ======================================================================= local function twoDateQScode(date1, date2, state) -- create QuickStatements string for "two date" dates  if state.adj1~='' or state.adj2~='' or state.era1~=state.era2 then  return '' -- QuickStatements string are not generated for two date phrases with adjectives  end  local outputStr = ''  local d1 = isodate2timestamp(date1, state.precision1, state.era1)  local d2 = isodate2timestamp(date2, state.precision2, state.era2)  if (not d1) or (not d2) then  return ''  end  -- find date with lower precision in common to both dates  local cd  local year1 = tonumber(string.sub(d1,2,5))  local year2 = tonumber(string.sub(d2,2,5))  local k = 0  for i = 1,10,1 do  if string.sub(d1,1,i)==string.sub(d2,1,i) then  k = i -- find last matching letter  end  end  if k>=9 then -- same month, since "+YYYY-MM-" is in common  cd = isodate2timestamp(string.sub(d1,2,8), 10, state.era1)  elseif k>=6 and k<9 then -- same year, since "+YYYY-" is in common  cd = isodate2timestamp(tostring(year1), 9, state.era1)  elseif k==4 then -- same decade(k=4, precision=8), since "+YYY" is in common  cd = isodate2timestamp(tostring(year1), 8, state.era1)  elseif k==3 then -- same century(k=3, precision=7) since "+YY" is in common  local d = tostring(math.floor(year1/100) +1) -- convert 1999 -> 20  cd = isodate2timestamp( d, 7, state.era1)  elseif k==2 then -- same millennium (k=2, precision=6), since "+Y" is in common  local d = tostring(math.floor(year1/1000) +1) -- convert 1999 -> 2  cd = isodate2timestamp( d, 6, state.era1)  end  if not cd then  return ''  end  --if not cd then  -- return ' <br/>error: ' .. d1.." / " .. d2.." / ".. (cd or '') .." / ".. string.sub(d1,2,5).." / " .. string.sub(d2,2,5).." / " .. tostring(k)  --end   --  if (state.conj=='from-until') or (state.conj=='and' and year1==year2-1) then  outputStr = cd ..",P580,".. d1 ..",P582,".. d2  elseif (state.conj=='between') or (state.conj=='or' and year1==year2-1) then  outputStr = cd ..",P1319,".. d1 ..",P1326,".. d2  elseif state.conj=='circa2' then  outputStr = cd ..",P1319,".. d1 ..",P1326,".. d2 ..",P1480,Q5727902"  end   return outputStr end  -- ======================================================================= local function processInputParams(conj, adj1, date1, units1, era1, adj2, date2, units2, era2, lang, passNr)   -- process inputs and save date in state array  local state = {}  state.conj = string.lower(conj or '')  state.adj1 = string.lower(adj1 or '')  state.adj2 = string.lower(adj2 or '')  state.era1 = string.lower(era1 or '')  state.era2 = string.lower(era2 or '')  state.units1 = string.lower(units1 or '')  state.units2 = string.lower(units2 or '')   -- if date 1 is missing but date 2 is provided than swap them  if date1 == '' and date2 ~= '' then  date1 = date2  date2 = ''  state = {adj1 = state.adj2, era1 = state.era2, units1 = state.units2,  adj2 = '', era2 = '', units2 = '', conj=state.conj, num=1}  end  if date2 ~= '' then state.nDates = 2  elseif date1 ~= '' then state.nDates = 1  else state.nDates = 0  end   -- reconcile alternative names for text inputs  local conj = checkAliases(state.conj ,'' ,'j')  state.adj1 ,conj = checkAliases(state.adj1 ,conj,'a')  state.units1,conj = checkAliases(state.units1,conj,'p')  state.era1 ,conj = checkAliases(state.era1 ,conj,'e')  state.special,conj = checkAliases('',conj,'c')  state.adj2 = checkAliases(state.adj2 ,'','a')  state.units2 = checkAliases(state.units2,'','p')  state.era2 = checkAliases(state.era2 ,'','e')  state.conj = conj  state.lang = lang  if p.Error~=nil then  return nil  end   -- calculate date precision value  date1, state.units1, state.precision1 = datePrecision(date1, state.units1)  date2, state.units2, state.precision2 = datePrecision(date2, state.units2)   -- Handle special cases  -- Some complex phrases can be created out of simpler ones. Therefore on pass # 1 we try to create  -- the phrase using complex phrase and if that is not found than on the second pass we try to build  -- the phrase out of the simpler ones  if passNr==1 then  if state.adj1=='circa' and state.nDates == 2 then  state.conj = 'circa2'  state.adj1 = ''  state.adj2 = ''  end  if state.nDates == 2 and state.adj1=='late' and state.adj2=='early' and state.conj=='and'  and state.units1==state.units2 and state.era1==state.era2 then  if state.units1=='century' then  state.conj='turn of the century'  elseif state.units1=='decade' then  state.conj='turn of the decade'  elseif state.units1=='' then  state.conj='turn of the year'  end  state.adj1 = ''  state.adj2 = ''  state.units1 = ''  state.units2 = ''  end  end   state.adj, state.era, state.units, state.precision = state.adj1, state.era1, state.units1, state.precision1  return date1, date2, state end  -- ================================================== -- === External functions =========================== -- ==================================================  function p.Era(frame)  -- process inputs  local dateStr  local args = frame.args  if not (args.lang and mw.language.isSupportedLanguage(args.lang)) then  args.lang = frame:callParserFunction( "int", "lang" ) -- get user's chosen language  end  local lang = args['lang']  local dateStr = args['date'] or ''  local eraType = string.lower(args['era'] or '')   dateStr = ISOdate(dateStr, lang, '', '', 1)  if eraType then  eraType = checkAliases(eraType ,'','e')  dateStr = translatePhrase(dateStr, '', eraType, lang, {})  end  return dateStr end  -- ======================================================================= function p._complex_date(conj, adj1, date1, units1, era1, adj2, date2, units2, era2, lang, passNr)  local Output=''  local state   -- process inputs and save date in state array  date1, date2, state = processInputParams(conj, adj1, date1, units1, era1, adj2, date2, units2, era2, lang, passNr)  if p.Error~=nil then  return nil  end   local errorStr = string.format(  '\n*conj=%s, adj1=%s, era1=%s, unit1=%s, prec1=%i, adj2=%s, era2=%s, unit2=%s, prec2=%i, special=%s',  state.conj, state.adj1, state.era1, state.units1, state.precision1,  state.adj2, state.era2, state.units2, state.precision2, state.special)   -- call specialized functions  local QScode = ''  if state.special~='' then  Output = otherPhrases(date1, date2, state.special, state.era1, lang, state)  elseif state.conj~='' then  QScode = twoDateQScode(date1, date2, state)  Output = twoDatePhrase(date1, date2, state, lang)  elseif state.adj1~='' or state.era1~='' or state.units1~='' then  Output = oneDatePhrase(date1, state.adj1, state.era1, state.units1, lang, 1, nil, state)  QScode = oneDateQScode(date1, state.adj1, state.era1, state.precision1)  elseif date1~='' then  Output = ISOdate(date1, lang, '', 'dtstart', '100-999')  end  if p.Error~=nil then  return errorStr  end   -- if there is any wikicode in the string than execute it  if mw.ustring.find(Output, '{') then  Output = mw.getCurrentFrame():preprocess(Output)  end  if QScode and #QScode>0 then  QScode = ' <div style="display: none;">date QS:P,' .. QScode .. '</div>'  end   return Output .. QScode end  -- ======================================================================= function p._complex_date_cer(conj, adj1, date1, units1, era1, adj2, date2, units2, era2, certainty, lang) -- same as p._complex_date but with extra parameter for certainty: probably, possibly, presumably, etc.  local dateStr = p._complex_date(conj, adj1, date1, units1, era1, adj2, date2, units2, era2, lang, 1)  certainty = checkAliases(certainty, conj, 'r')  local LUT = {probably='Q56644435', presumably='Q18122778', possibly='Q30230067', circa='Q5727902' }  if certainty and LUT[certainty] then  local state = {}  date1, date2, state = processInputParams(conj, adj1, date1, units1, era1, adj2, date2, units2, era2, lang, 1)  dateStr = translatePhrase(dateStr, '', certainty, lang, state)  dateStr = string.gsub(dateStr, '(%<div style="display: none;"%>date QS:P,[^%<]+)(%</div%>)', '%1,P1480,' .. LUT[certainty] .. '%2' )  end  return dateStr end  -- ======================================================================= function p.complex_date(frame)  -- process inputs  local dateStr  local args = frame.args  if not (args.lang and mw.language.isSupportedLanguage(args.lang)) then  args.lang = frame:callParserFunction( "int", "lang" ) -- get user's chosen language  end  local date1 = args['date1'] or args['2'] or args['date'] or ''  local date2 = args['date2'] or args['3'] or ''  local conj = args['conj'] or args['1'] or ''  local adj1 = args['adj1'] or args['adj'] or ''  local adj2 = args['adj2'] or ''  local units1 = args['precision1'] or args['precision'] or ''  local units2 = args['precision2'] or args['precision'] or ''  local era1 = args['era1'] or args['era'] or ''  local era2 = args['era2'] or args['era'] or ''  local certainty = args['certainty']  local lang = args['lang']   dateStr = p._complex_date_cer(conj, adj1, date1, units1, era1, adj2, date2, units2, era2, certainty, lang)  if p.Error~=nil then  dateStr = p.Error .. '[[Category:Pages using Complex date template with incorrect parameter]]'  end  return dateStr end  return p