Módulo:Complex date

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--[[
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	| |  | | (_) | (_| | |_| | |  __/_| |__| (_) | | | | | | |_) | |  __/>  <  | (_| | (_| | ||  __/
	|_|  |_|\___/ \__,_|\__,_|_|\___(_)\____\___/|_| |_| |_| .__/|_|\___/_/\_\  \__,_|\__,_|\__\___|
																																																								|_|
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:Calendário") -- 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 .. '[[Categoria:!Pages using Complex date template with incorrect parameter]]'
				end
				return dateStr
end
return p