local function getCatForId( id )
 local title = mw.title.getCurrentTitle
 local namespace = title.namespace
 if namespace == 0 then
 return '분류:' .. id .. ' 식별자를 포함한 위키백과 문서'
 elseif namespace == 2 and not title.isSubpage then
 return '분류:' .. id .. ' 식별자를 포함한 사용자 문서'
 else
 return '분류:' .. id .. ' 식별자를 포함한 기타 문서'
 end
end

local function viafLink( id )
 if not string.match then
 return false
 end
 return '[https://viaf.org/viaf/' .. id .. ' ' .. id .. ']' .. getCatForId( 'VIAF' )
end

local function kulturnavLink( id )
 return '[http://kulturnav.org/language/en/' .. id .. ' id]' 
end

local function sikartLink( id )
 return '[http://www.sikart.ch/KuenstlerInnen.aspx?id=' .. id .. '&lng=en ' .. id .. ']' 
end

local function tlsLink( id )
	local id2 = mw.ustring.gsub(id, '%s', function(s) return mw.uri.encode end)
 return '[http://tls.theaterwissenschaft.ch/wiki/' .. id2 .. ' ' .. id .. ']' 
end

local function ciniiLink( id )
 return '[http://ci.nii.ac.jp/author/' .. id .. '?l=en ' .. id .. ']' 
end

local function bneLink( id )
 return '[http://catalogo.bne.es/uhtbin/authoritybrowse.cgi?action=display&authority_id=' .. id .. ' ' .. id .. ']' 
end

local function uscongressLink( id )
 return '[http://bioguide.congress.gov/scripts/biodisplay.pl?index=' .. id .. ' ' .. id .. ']' 
end

local function narapersonLink( id )
 return '[https://research.archives.gov/person/' .. id .. ' ' .. id .. ']' 
end

local function naraorganizationLink( id )
 return '[https://research.archives.gov/organization/' .. id .. ' ' .. id .. ']' 
end

local function botanistLink( id )
	local id2 = mw.ustring.gsub(id, '%s', function(s) return mw.uri.encode end)
 return '[http://www.ipni.org/ipni/advAuthorSearch.do?find_abbreviation=' .. id2 .. ' ' .. id .. ']' 
end

local function mgpLink( id )
 -- TODO Implement some sanity checking regex
 return '[http://www.genealogy.ams.org/id.php?id=' .. id .. ' ' .. id .. ']' 
end

local function rslLink( id )
 -- TODO Implement some sanity checking regex
 return '[http://aleph.rsl.ru/F?func=find-b&find_code=SYS&adjacent=Y&local_base=RSL11&request=' .. id .. '&CON_LNG=ENG ' .. id .. ']'
end

local function leonoreLink( id )
-- Identifiants allant de LH/1/1 à LH/2794/54 (légionnaires)
-- Identifiants allant de C/0/1 à C/0/84 (84 légionnaires célèbres)
-- Identifiants allant de 19800035/1/1 à 19800035/385/51670 
 if not string.match and
 not string.match and
	 not string.match then
 return false
 end
 return '[//www.culture.gouv.fr/public/mistral/leonore_fr?ACTION=CHERCHER&FIELD_1=COTE&VALUE_1=' .. id .. ' ' .. id .. ']' 
end

local function sbnLink( id )
 if not string.match and not string.match then
 return false
 end
 return '[http://opac.sbn.it/opacsbn/opac/iccu/scheda_authority.jsp?bid=' .. id .. ' ' .. id .. ']' .. getCatForId( 'SBN' )
end

local function nkcLink( id )
	return '[http://aleph.nkp.cz/F/?func=find-c&local_base=aut&ccl_term=ica=' .. id .. '&CON_LNG=ENG ' .. id .. ']' 
end

local function nclLink( id )
 if not string.match then
 return false
 end
 return '[http://aleweb.ncl.edu.tw/F/?func=accref&acc_sequence=' .. id .. '&CON_LNG=ENG ' .. id .. ']' 
end

local function ndlLink( id )
	return '[http://id.ndl.go.jp/auth/ndlna/' .. id .. ' ' .. id .. ']' 
end

local function sudocLink( id )
 if not string.match then
 return false
 end
 return '[http://www.idref.fr/' .. id .. ' ' .. id .. ']' 
end

local function melonLink( id )
	return '[https://www.melon.com/artist/timeline.htm?artistId=' .. id .. ' ' .. id .. ']' .. getCatForId( '멜론' )
end

local function hlsLink( id )
 if not string.match then
 return false
 end
 return '[http://www.hls-dhs-dss.ch/textes/f/F' .. id .. '.php ' .. id .. ']'
end

local function lirLink( id )
 if not string.match then
 return false
 end
 return '[http://www.e-lir.ch/e-LIR___Lexicon.' .. id .. '.450.0.html ' .. id .. ']'
end

local function splitLccn( id )
 if id:match( '^%l%l?%l?%d%d%d%d%d%d%d%d%d?%d?$' ) then
 id = id:gsub( '^(%l+)(%d+)(%d%d%d%d%d%d)$', '%1/%2/%3' )
 end
 if id:match( '^%l%l?%l?/%d%d%d?%d?/%d+$' ) then
 return mw.text.split
 end
 return false
end

local function append
 while str:len < length do
 str = c .. str
 end
 return str
end

local function lccnLink( id )
 local parts = splitLccn( id )
 if not parts then
 return false
 end
 local lccnType = parts[1] ~= 'sh' and 'names' or 'subjects'
 id = parts[1] .. parts[2] .. append
 return '[http://id.loc.gov/authorities/' .. lccnType .. '/' .. id .. ' ' .. id .. ']' .. getCatForId( 'LCCN' )
end

local function mbLink( id )
 -- TODO Implement some sanity checking regex
 return '[//musicbrainz.org/artist/' .. id .. ' ' .. id .. ']' .. getCatForId( 'MusicBrainz' )
end

--Returns the ISNI check digit isni must be a string where the 15 first elements are digits
local function getIsniCheckDigit( isni )
 local total = 0
 for i = 1, 15 do
 local digit = isni:byte( i ) - 48 --Get integer value
 total = (total + digit) * 2
 end
 local remainder = total % 11
 local result = (12 - remainder) % 11
 if result == 10 then
 return "X"
 end
 return tostring( result )
end

--Validate ISNI (and ORCID) and retuns it as a 16 characters string or returns false if it's invalid
--See http://support.orcid.org/knowledgebase/articles/116780-structure-of-the-orcid-identifier
local function validateIsni( id )
 id = id:gsub:upper
 if not id:match( '^%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d[%dX]$' ) then
 return false
 end
 if getIsniCheckDigit( id ) ~= string.char( id:byte( 16 ) ) then
 return false
 end
 return id
end

local function isniLink( id )
 id = validateIsni( id )
 if not id then
 return false
 end
 return '[http://isni-url.oclc.nl/isni/' .. id .. ' ' .. id:sub .. ' ' .. id:sub .. ' ' .. id:sub .. ' ' .. id:sub .. ']' .. getCatForId( 'ISNI' )
end

local function orcidLink( id )
 id = validateIsni( id )
 if not id then
 return false
 end
 id = id:sub .. '-' .. id:sub .. '-' .. id:sub .. '-' .. id:sub
 return '[http://orcid.org/' .. id .. ' ' .. id .. ']' .. getCatForId( 'ORCID' )
end

local function gndLink( id )
 return '[http://d-nb.info/gnd/' .. id .. ' ' .. id .. ']' .. getCatForId( 'GND' )
end

local function selibrLink( id )
	if not string.match then
 return false
 end
 return '[//libris.kb.se/auth/' .. id .. ' ' .. id .. ']' .. getCatForId( 'SELIBR' )
end

local function bnfLink( id )
 --Add cb prefix if it has been removed
 if not string.match then
 id = 'cb' .. id
 end

 return '[http://catalogue.bnf.fr/ark:/12148/' .. id .. ' ' .. id .. '] [http://data.bnf.fr/ark:/12148/' .. id .. ' (데이터)]' .. getCatForId( 'BNF' )
end

local function bpnLink( id )
 if not string.match then
 return false
 end
 return '[http://www.biografischportaal.nl/en/persoon/' .. id .. ' ' .. id .. ']' .. getCatForId( 'BPN' )
end

local function ridLink( id )
 return '[http://www.researcherid.com/rid/' .. id .. ' ' .. id .. ']' .. getCatForId( 'RID' )
end

local function bibsysLink( id )
 return '[http://ask.bibsys.no/ask/action/result?cmd=&kilde=biblio&cql=bs.autid+%3D+' .. id .. '&feltselect=bs.autid ' .. id .. ']' .. getCatForId( 'BIBSYS' )
end

local function ulanLink( id )
 return '[//www.getty.edu/vow/ULANFullDisplay?find=&role=&nation=&subjectid=' .. id .. ' ' .. id .. ']' .. getCatForId( 'ULAN' )
end

local function nlaLink( id )
	return '[//nla.gov.au/anbd.aut-an' .. id .. ' ' .. id .. ']' .. getCatForId( 'NLA' )
end

local function rkdartistsLink( id )
	return '[https://rkd.nl/en/explore/artists/' .. id .. ' ' .. id .. ']' .. getCatForId( 'RKDartists' )
end

local function nlkLink( id )
	return '[//nl.go.kr/authorities/resource/' .. id .. ' ' .. id .. ']' ..getCatForId('국립중앙도서관')
end

local function getIdsFromWikidata
 local ids = {}
 if not item.claims[property] then
 return ids
 end
 for _, statement in pairs( item.claims[property] ) do
		if statement.mainsnak.datavalue then
			table.insert
		end
 end
 return ids
end

local function matchesWikidataRequirements
 for _, group in pairs( reqs ) do
 local property = 'p' .. group[1]
 local qid = group[2]
 if item.claims[property] ~= nil then
 for _, statement in pairs ( item.claims[property] ) do
 	if statement.mainsnak.datavalue ~= nil then
	 if statement.mainsnak.datavalue.value['numeric-id'] == qid then
 	 return true
 	 end
 	 end
 end
 end
 end
 return false
end

local function createRow
 if link then
 if withUid then
 return '* ' .. label .. ' \n'
 else
 return '* ' .. label .. ' ' .. link .. '\n'
 end
 else
 return '* 분류:잘못된 전거 통제 정보를 포함한 위키백과 문서\n'
 end
end

--In this order: name of the parameter, label, propertyId in Wikidata, formatting function
local conf = {

-- Check that the Wikidata item has this property-->value before adding it
local reqs = {}

local p = {}

function p.authorityControl( frame )
 local parentArgs = frame:getParent.args
 --Create rows
 local elements = {}

 --redirect PND to GND
 if (parentArgs.GND == nil or parentArgs.GND == '') and parentArgs.PND ~= nil and parentArgs.PND ~= '' then
 parentArgs.GND = parentArgs.PND
 end

 --Wikidata fallback if requested
 local item = mw.wikibase.getEntityObject
 if item ~= nil and item.claims ~= nil then
 for _, params in pairs( conf ) do
 if params[3] ~= 0 then
 local val = parentArgs[params[1]]
 if not val or val == '' then
 	local canUseWikidata = nil
 if reqs[params[1]] ~= nil then
 canUseWikidata = matchesWikidataRequirements
 else
 canUseWikidata = true
 end
 if canUseWikidata then
 local wikidataIds = getIdsFromWikidata
 if wikidataIds[1] then
 parentArgs[params[1]] = wikidataIds[1]
 end
 end
 end
 end
 end
 end

 --Worldcat
 if parentArgs['WORLDCATID'] and parentArgs['WORLDCATID'] ~= '' then
 table.insert( elements, createRow ) --Validation?
 elseif parentArgs['LCCN'] and parentArgs['LCCN'] ~= '' then
 local lccnParts = splitLccn( parentArgs['LCCN'] )
 if lccnParts and lccnParts[1] ~= 'sh' then
 table.insert( elements, createRow )
 end
 end

 --Configured rows
 local rct = 0
 for k, params in pairs( conf ) do
 local val = parentArgs[params[1]]
 if val and val ~= '' then
 table.insert( elements, createRow( params[1], params[2] .. ':', val, params[4]( val ), true ) )
 rct = rct + 1
 end
 end
 local Navbox = require('Module:Navbox')
 local elementscats = ''
 if rct > 13 then
 	elementscats = '분류:' .. rct .. ' 종류의 전거 통제 정보를 포함'
	end
	
	if #elements ~= 0 then
		return Navbox._navbox( {
			name = 'Authority control',
			bodyclass = 'hlist',
			group1 = '전거 통제' .. elementscats,
			list1 = table.concat( elements )
	else
		return ""
	end
end