Module:Quickbar

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local function starts_with(str, start)
   return str:sub(1, #start) == start
end

local function renderRow(heading, value)
	return '|-\n| style="vertical-align:top; padding-left:5px; padding-right:5px; white-space:nowrap;" | \'\'\'' .. heading .. '\'\'\'\n| style="padding-right:5px;" | ' .. value .. '\n'
end

local function renderLinkedClaim(id)
	local linkTarget = mw.wikibase.sitelink(id)
	local linkName = mw.wikibase.label(id)
	if linkTarget == nil then
		return linkName
	else
		return '[[' .. linkTarget .. '|' .. linkName .. ']]'
	end
end


local function rSimple(item, property)
	return item:formatPropertyValues( property ).value
end

local lang = mw.language.getContentLanguage()
local thousands = {'', 'thousand', 'million', 'billion'}


local function sigfigs(num)
	local digits = math.floor(math.log10(num) / 3)
	if digits <= 0 then
		return lang:formatNum(num)
	end
	num = math.floor(num / math.pow(10, 3 * digits -1)) / 10
	local result = lang:formatNum(num)
	result = result .. ' ' .. thousands[digits+1]
--	if num ~= 1 then 
--		result = result .. 's'	
--	end
	return result
end

local function rPopulation(item, property, frame)
	local s = item:getBestStatements( property )[1]
	local result = sigfigs( tonumber(s.mainsnak.datavalue.value.amount) )
	
	if s.qualifiers ~= nil and s.qualifiers['P585'] ~= nil and #s.qualifiers['P585'] > 0 then
		result = result .. ' (' ..  string.match(s.qualifiers['P585'][1].datavalue.value.time, '0*([1-9][0-9]+)\-', 1) .. ')'
	end
	return result
end

local function rElectricity(item, property)
	local claims = item:getBestStatements( property )
	local voltage = {}
	for _,s in pairs(claims) do 
		local v = mw.wikibase.renderSnak( s.mainsnak )
		if s.qualifiers ~= nil and s.qualifiers['P2144'] ~= nil and #s.qualifiers['P2144'] > 0 then
			v = v .. ' / ' .. mw.wikibase.renderSnak(s.qualifiers['P2144'][1])
		end
		table.insert(voltage, v)
	end
	local result = table.concat(voltage, ' and ')
	if #item:getBestStatements('P2853') > 0 then
		result = result .. ' (' .. item:formatPropertyValues( 'P2853' ).value .. ')'
	end
	return result
end

local function claimOrLabel(id, property) 
	local item = mw.wikibase.getEntity( id )
	if #item:getBestStatements( property ) > 0 and item:getBestStatements( property )[1].mainsnak.datavalue ~= nil then
		return mw.wikibase.renderSnak( item:getBestStatements( property )[1].mainsnak )
	end
	return item:getLabel()
end

local function rCurrency(item, property)
	local claims = item:getBestStatements(property)
	local result = {}
	for _, claim in pairs(claims) do
		local id = 'Q' .. claim.mainsnak.datavalue.value['numeric-id']
		local currency = mw.wikibase.getEntity( id )
		local subresult = currency:getLabel()
		local symbol = claimOrLabel( id, 'P498' )
		if symbol ~= currency:getLabel() then
			subresult = subresult .. ' (' .. symbol .. ')'
		end
--		if #currency:getBestStatements('P2284') > 0 then
--			for _, price in pairs(currency:getBestStatements('P2284')) do
--				if tonumber(price.mainsnak.datavalue.value.amount) ~= 0 then
--					subresult = subresult .. '<br/>1 '..symbol..' = '..  string.format('%.4f', price.mainsnak.datavalue.value.amount ) .. ' ' .. claimOrLabel(string.match(price.mainsnak.datavalue.value.unit , 'Q%d+$'), 'P498')
--				end
--			end
--		end
		table.insert(result, subresult)
	end
	return table.concat(result, '<br/>')
end

local function rEmergency(item, property)
	local claims = item:getBestStatements( property )
	local result = {}
	for _, claim in pairs(claims) do
		local id = 'Q' .. claim.mainsnak.datavalue.value['numeric-id']
		local res = claimOrLabel(id, 'P1329')
		if claim.qualifiers ~= nil and claim.qualifiers['P366'] ~= nil and #claim.qualifiers['P366'] > 0 then
			local usage = {}
			for _, qual in pairs(claim.qualifiers['P366']) do
				table.insert( usage, mw.wikibase.renderSnak(qual) )
			end
			res = res .. ' (' .. table.concat(usage, ', ') .. ')'
		end
		table.insert(result, res)
	end
	return table.concat(result, ', ')
end

local function rTimezones(item, property)
	local claims = item:getBestStatements( property )
	if #claims > 3 then
		local minEntity = nil
		local maxEntity = nil
		local minOffset = 20
		local maxOffset = -20
		local unknownTZs = {}
		for _, claim in pairs(claims) do
			local e = mw.wikibase.getEntity('Q' .. claim.mainsnak.datavalue.value['numeric-id'] )
			if #e:getBestStatements( 'P2907' ) == 1 then
				local val = tonumber( e:getBestStatements( 'P2907' )[1].mainsnak.datavalue.value.amount )
				if val < minOffset then
					minOffset = val
					minEntity = e
				end
				if val > maxOffset then
					maxOffset = val
					maxEntity = e
				end
			else
				table.insert(unknownTZs, e:getLabel())
			end
		end
		if minEntity ~= nil and maxEntity ~= nil and minOffset ~= maxOffset then
			local r = minEntity:getLabel() .. ' to ' .. maxEntity:getLabel()
			if #unknownTZs > 0 then
				r = r .. ' and ' .. table.concat(unknownTZs, ', ')	
			end
			return r
		end
	end
	return rSimple(item, property)
end

local function rSingleLinked(item, property) 
	if item:getBestStatements( property )[1].mainsnak.datavalue ~= nil then
		return renderLinkedClaim('Q'..item:getBestStatements( property )[1].mainsnak.datavalue.value['numeric-id'])
	else
		return nil
	end
end

local function rLinked(item, property)
	local claims = item.claims[property]
	local result = {}
	for _, claim in pairs(claims) do
		local id = 'Q' .. claim.mainsnak.datavalue.value['numeric-id']
		table.insert(result, renderLinkedClaim(id))
	end
	return table.concat(result, ', ')
end

local conf = {
	{'capital', 'Capital', 36, rSingleLinked},
	{'currency', 'Currency', 38, rCurrency},
	{'population', 'Population', 1082, rPopulation},
	{'electricity', '[[Electrical systems|Electricity]]', 2884, rElectricity},
	{'callingcode', '[[List of country calling codes|Country code]]', 474, rSimple},
	{'timezone', '[[Time zones|Time zone]]', 421, rTimezones},
	{'emergencies', 'Emergencies', 2852, rEmergency},
	{'driving side', 'Driving side', 1622, rSimple}
}

local p = {}

function p.quickbar( frame )
	local parentArgs = frame:getParent().args
	local elements =  {}
	
	local item = mw.wikibase.getEntity(  )
	
	local useWikidata = (item ~= nil and item.claims ~= nil)
	local missingInfo = false
	
	local locationMap = parentArgs['location']
	if (locationMap and starts_with(locationMap, '#Q')) then
		item = mw.wikibase.getEntity(locationMap:gsub("#", ""))
		locationMap = nil
	end
	
	if (locationMap ~= nil and locationMap ~= '') or (useWikidata and item.claims['P242'] ~= nil and item.claims['P242'][1] ~= nil) then
		if useWikidata and (locationMap == nil or locationMap == '') then
			locationMap = mw.wikibase.renderSnak( item:getBestStatements('P242')[1].mainsnak )
		end
		table.insert(elements, '| colspan="2" style="text-align:center; padding:0px;" | [[File:' .. locationMap  .. '|250px]]\n' )
	else
		missingInfo = true	
	end
	item = mw.wikibase.getEntity(  )
	
    for _, params in pairs( conf ) do
        if params[3] ~= 0 then
            local val = parentArgs[params[1]]
            if (val and starts_with(val, '#Q')) then
                item = mw.wikibase.getEntity(val:gsub("#", ""))
                val = nil
            end
            if val == '' or val == nil then
            	if useWikidata and #item:getBestStatements('P' .. params[3]) > 0 then
            		val = params[4]( item, 'P' .. params[3], frame)
            		if val ~= nil then
                		table.insert( elements, renderRow(params[2], val) )
                	else
                		missingInfo = true	
                	end
            	else
            		missingInfo = true
            	end
        	else
            	table.insert(elements, renderRow(params[2], val) )	
            end
        end
        item = mw.wikibase.getEntity( )
    end
	
	local editRow = ''
	if item ~= nil then
		editRow = '|-\n| colspan="2" style="padding-left:5px; padding-right:5px; font-size:90%; margin-top:5px; border-top:1px solid #ccc; text-align:right;" |[[:d:'.. item.id .. '|edit on Wikidata]]\n'
	end
	
	if #elements > 0 then
		if missingInfo == true and mw.title.getCurrentTitle().namespace == 0 then
			table.insert(elements, '[[Category:Quickbar with missing information]]\n')	
		end
		return '<div id="quickbar" class="wv-quickbar" style="float:right; margin:0 0 0 1em;">\n{| cellpadding="0" cellspacing="0" style="font-size:85%; background-color:#f9f9f9; border:1px solid #cccccc; width:250px;"\n|-\n' ..
			table.concat(elements)	..
			'\n'.. editRow.. '|}</div>'
	else
		if mw.title.getCurrentTitle().namespace == 0 then
			return '[[Category:Quickbar with missing information]]\n'
		end
		return ''
	end
end

return p