Redigerer Modul:WikidataReferanse

local p = {}

local labeltekst = {
	["P50"] = "", -- forfatter
	["P123"] = "", -- utgiver
	["P248"] = "", -- nevnt i
	["P577"] = "utgitt ", -- utgivelsesdato
	["P813"] = "besøkt ", -- besøksdato
	["P854"] = ""  -- referanse-URL
}
local wait = {
	["P577"] = true, -- utgivelsesdato
	["P813"] = true, -- besøksdato
	["P1683"] = true, -- sitat
	["Pxxxx"] = true   -- dummy
}
local checkLabel = {
	["P1810"] = true,  -- oppført som
	["Pxxxx"] = true   -- dummy
}
local unknownItem = 0
local done = {}
local reftxt = ""
local sep = ""

local lang = mw.language.getContentLanguage()
local maanednavn = {'januar', 'februar', 'mars', 'april', 'mai', 'juni', 'juli', 'august', 'september', 'oktober', 'november', 'desember'}

function splitTimestamp(timestamp)
	local aar = string.sub(timestamp, 2, 5) or '????'
	local maaned = maanednavn[tonumber(string.sub(timestamp, 7, 8) or '00')] or '??'
	local dag = tonumber(string.sub(timestamp, 10, 11) or '??')..'.'
	local fkr = ''
	if string.sub(timestamp, 1, 1) == '-' then
		fkr = ' f.Kr.'
	end
	return aar,maaned,dag,fkr
end

function kalender(kal)
	if string.match (kal, 'wikidata.org/entity/Q1985727$' ) then
		return ''
	end
	if string.match (kal, 'wikidata.org/entity/Q1985786$' ) then
--Kun når datoen er etter oktober 1582 bør juliansk skrives ut. Alle datoer før dette blir regnet for å være julianske uansett.
--		local html = mw.html.create( 'span' )
--			:wikitext( '[[Den julianske kalenderen|juliansk]]' )
		return '' --' ('..tostring( html )..')'
	end
	return mw.text.nowiki( kal )
end


local function norskDatoFraClaim(claim)
	if claim.snaktype ~= "value" then
		return "ingen verdi"
	end
	local value = claim.datavalue.value
	local presisjon = value.precision
	local aar,maaned,dag,fkr = splitTimestamp(value.time)
	local utstring = ''

	if presisjon == 11 then
		utstring = string.format( '%s %s %s%s', dag, maaned, tonumber(aar) or aar, fkr )
	elseif presisjon == 10 then
		utstring = string.format( '%s %s%s', maaned, tonumber(aar) or aar, fkr )
	elseif presisjon == 9 then
		utstring = (tonumber(aar) or aar)..''..fkr
		utstring = string.format( '%s%s', tonumber(aar) or aar, fkr )
	elseif presisjon == 8 then
		utstring = string.format( '%s-årene%s',  math.floor(((tonumber(aar) or 0))/10)*10, fkr ) 
	elseif presisjon == 7 then
		utstring = string.format( '%s. århundre%s', math.floor(((tonumber(aar) or 0)+99)/100), fkr )
	end

	return mw.text.nowiki( utstring ).. kalender(value.calendarmodel)
end

function addRefTxt(pidLabel,refValue)
		reftxt = reftxt .. sep .. "  " .. pidLabel .. refValue 
		--  .. " ( " .. datatype .. " )"
		sep = ", "
end

local function formatUrl(url)
	local reftext = url
	local j1 = string.find(reftext,'//',1,true)
	if j1 then reftext = string.sub(reftext,j1+2,string.len(reftext)) else reftext = '' end
	if reftext ~= '' then
		local i1 = string.find(reftext,'/',1,true)
		if i1 then reftext = string.sub(reftext,1,i1-1) end
	else
		reftext = url
	end
	return "[" .. url .. " " .. reftext .. "]"
end

local function formatItem(property)
	local item = nil
	if property[1].snaktype == "value" then
		item = property[1].datavalue.value or nil
	end
	if item then
		local value = item.id
		local label = mw.wikibase.label( value )
		local sitelink = mw.wikibase.sitelink( value )
		if sitelink or label then
			return mw.wikibase.formatValues(property)
		end
		unknownItem = unknownItem +1
		return '[[d:' .. value .. '|' .. value .. ']]'
	else
		return "ingen verdi"
    end
end

function fmtTitle(ref)
	if done["P1476"] then 
		return 
	end
	done["P1476"] = true
	title = ref["P1476"] or nil
	if title then
		local refValue = "«" .. mw.wikibase.formatValues(title) .. "»"
		if ref["P854"] then
			refValue = "[" .. ref["P854"][1].datavalue.value .. " " .. refValue .. "]"
			done["P854"] = true
		end
		addRefTxt("",refValue)
	end
	return 
end

function fmtQuote(pid,ref)
	if done[pid] then 
		return 
	end
	done[pid] = true
	local quote = ref[pid] or nil
	if quote then
		local refValue = "«" .. mw.wikibase.formatValues(quote) .. "»"
		addRefTxt("",refValue)
	end
	return 
end

-- Ignore cases where the value is just the label.
function fmtLlabelCheck(pid,ref)
	if done[pid] then 
		return 
	end
	done[pid] = true
	local refItem = ref[pid] or nil
	if refItem then
		local refValue = mw.wikibase.formatValues(refItem)
		local pidLabel = labeltekst[pid] or mw.wikibase.getLabel(pid) .. " "
		local label = mw.wikibase.label()
		local refString = ref[pid][1].datavalue.value
		if not (label == refString ) then     
			addRefTxt(pidLabel,refValue)
		end
	end
	return 
end

function fmtItem(pid,ref)
	if done[pid] then 
		return 
	end
	local property = ref[pid] or nil
	if property then
		local pidLabel = labeltekst[pid] or mw.wikibase.getLabel(pid) .. " "
		local refValue = formatItem(property)
		addRefTxt(pidLabel,refValue)
	end
	done[pid] = true
end

function fmtDato(pid,ref)
	if done[pid] then 
		return 
	end
	local property = ref[pid] or nil
	if property then
		local pidLabel = labeltekst[pid] or mw.wikibase.getLabel(pid) .. " "
		local refValue = norskDatoFraClaim(property[1])
		addRefTxt(pidLabel,refValue)
	end
	done[pid] = true
end

function fmtMisc(ref)
	for pid, property in pairs(ref) do
		if checkLabel[pid] then
			fmtLlabelCheck(pid,ref)
		elseif not done[pid] and not wait[pid] then
			local datatype = property[1].datatype or "xxx"
			local pidLabel = labeltekst[pid] or mw.wikibase.getLabel(pid) .. " "
			local refValue = mw.wikibase.formatValues(property)
			if datatype == 'url' then
			 	refValue = formatUrl(property[1].datavalue.value)
			elseif datatype == 'time' then
				refValue = norskDatoFraClaim(property[1])
			elseif datatype == 'wikibase-item' then
				refValue = formatItem(property)
			end
		    addRefTxt(pidLabel,refValue)
			done[pid] = true
		end
	end
end

function fmtSingle(ref)
	local num = 0
	for pid, property in pairs(ref) do
		num = num+1
	end

	if num~=1 then
		 return false
	end
	if not ref["P248"] then
		return false
	end
	local P248 = ref["P248"]
	local item = nil
	if P248[1].snaktype == "value" then
		item = P248[1].datavalue.value or nil
	end
	if item then
		local value = item.id
		local label = mw.wikibase.label( value )
		local description = mw.wikibase.description( value )
		local sitelink = mw.wikibase.sitelink( value )
		if label and not sitelink then
			local txt ="«" .. label .. "», " .. description
			addRefTxt("",txt)
			return true
		end
	end
	return false
end

function p.formatRef(ref)
	reftxt = ""
	sep = ""
	done = {}
	local args = mw.getCurrentFrame():getParent().args
	if args and args["wikidatatesting"] == "ref" then
		if fmtSingle(ref) then
			return reftxt
		end
	end
	local refValue = nil
	fmtItem("P123",ref) -- utgiver
	fmtItem("P248",ref) -- nevnt i
	fmtItem("P50",ref)  -- fortatter
	fmtTitle(ref)
    fmtMisc(ref)
	fmtDato("P577",ref)  -- utgivelsesdato
	fmtDato("P813",ref)  -- besøksdato
	fmtQuote("P1683",ref) -- sitat
	return reftxt
	-- return mw.wikibase.formatValues( ref )
	-- return "<pre>" .. mw.text.jsonEncode(ref, mw.text.JSON_PRETTY) .. "</pre>"
end

function findReference(property,args)
	for k,v in pairs( args ) do
		if not property[k] then
			return false
		end
		return true
	end
	return true
end

local definedArgs = {
	["id"] = "id",
	["utsagn"] = "utsagn"
}

function findArgs(args)
	local propertyArgs = {}
	count = 0
	for k,v in pairs( args ) do
		if not definedArgs[k] then
			 propertyArgs[k] = v
			-- table.insert( propertyArgs, v )
			count =  count + 1
		end
	end
	return propertyArgs
end

function selectRef(frame,refs,args)
	local txt = ""
	for k,v in pairs( refs ) do
		if findReference(v.snaks,args) then
		--txt = txt .. findReference(v.snaks,args) 
			local content = p.formatRef(v.snaks)
			local attrs = { name = string.format( 'hash-%s', v.hash ) }
		--	txt = txt .. "<pre>" .. mw.text.jsonEncode(v.snaks,mw.text.JSON_PRETTY) .. "</pre>"
			if content and content ~= "" then
				txt = txt .. 
			-- " Ny:" .. k .. 
				frame:extensionTag( 'ref', content, attrs )
			else
				-- txt = txt .. "<pre>" .. mw.text.jsonEncode(v.snaks,mw.text.JSON_PRETTY) .. "</pre>"
			end
		--	.. " Ny:" 
		end	
--			txt = txt .. "<pre>" .. mw.text.jsonEncode(v,mw.text.JSON_PRETTY) .. "</pre>"
	end
	return txt
end

function p.referanse(frame)
	local args = frame.args
	local propertyId = args["property"]
	local entityId = args['id'] or args[1] or nil
	if entityId == "" then
		entityId = nil
	end
	local entity = mw.wikibase.getEntity(entityId) or nil
	local entityId = entity.id or nil
	if not entityId then
		return ""
	end
	-- local statements = mw.wikibase.getBestStatements( entityId, propertyId )
--	local entity = mw.wikibase.getEntity(entityId)
	local property = entity:getBestStatements(args["utsagn"])
	--local txt = "<pre>" .. mw.text.jsonEncode(property, 	mw.text.JSON_PRETTY) .. "</pre>"
	local txt = ""
	if property and property[1] then
		local propertyArgs =  findArgs(args)
		local refsnaks = property[1]["references"] or nil
		txt = selectRef(frame,refsnaks,propertyArgs)
	end
	return txt --.. "<pre>" .. mw.text.jsonEncode(property[1]["references"], --property[1]["references"][1], 
	--	mw.text.JSON_PRETTY) .. "</pre>"
end


function p.test(frame)
	return p.referanse(frame)
	-- return "test test"	
end

return p