local yesno    = require( 'Modul:Yesno' ) local pnumber  = require( 'Module:GetNumber' ) local pstring  = require( 'Module:GetString' ) local p36      = require( 'Module:GetP36' ) local p856     = require( 'Module:GetP856' ) local images   = require( 'Module:GetImage' ) local province = require( 'Module:GetProvince' )  -- returns nil, if both values are equal, otherwise the value -- similar to the SQL function nullif() local function nilIf ( value, equalValue )     if ( value == nil ) then       return nil    elseif ( tostring ( value ) == tostring ( equalValue ) ) then       return nil    else       return value    end  end  -- returns the first value that is not nil -- similar to the SQL function coalesce() local function coalesce ( value1, value2, value3 )    return value1 or value2 or value3 end  local function checkMapObject ( id )    local region = require ( 'Modul:Location map data ' .. id )    if ( region ~= nil ) and ( region.data ~= nil ) then       region.data['id'] = id       return region    else       return nil    end end   local qbAirport = {}  function qbAirport.qb_airport ( frame )       -- copying and lowering the given parameters    local templateArgs = {}    for key,value in pairs ( frame.args ) do       templateArgs[string.lower(key)] = value    end    for key,value in pairs ( frame:getParent().args ) do       templateArgs[string.lower(key)] = value    end     -- variables for the whole quickbar content and the categories    local display = ''    local categories = ''     -- province information are used twice    -- variables for saving information    local provinceName = ''    local provinceCode = ''        -- contains some site.infos    -- needed as fallback for the  parameter "Namen" and the location map    local page = {}    page = mw.title.getCurrentTitle()        -- getting or determining (if needed) the wikidata-ID    if templateArgs.id == '' then templateArgs.id = nil end    local qbID = nilIf ( nilIf ( templateArgs.id, 'self' ), '' ) or mw.wikibase.getEntityIdForCurrentPage() or ''     -- getting object name    -- uses WD sitelink and the page name as fallback    local destinationName    if qbID ~= '' then        destinationName = coalesce ( mw.wikibase.getSitelink( qbID, 'dewikivoyage' ), page.text, 'Ort')    else       destinationName = coalesce ( page.text, 'Ort')    end     -- determining the country     -- (not urgently needed, but if someone wants to develop country- specific quickbars)    -- getting from Wikidata, if not provided    -- if you want to save processing time, you should provide it    -- e.g. in country specific infobox tables    local qbIso3166 = templateArgs["iso-3166"] or ''    local qbIso3166Class = ''     if qbIso3166 == '' then       if qbID ~= '' then          local wdCountry = mw.wikibase.getBestStatements( qbID, 'P17' )          local wdIso3166 = {}          if #wdCountry > 0 then             -- there where empty values             if wdCountry[1].mainsnak.datavalue ~= nil then                wdIso3166 = mw.wikibase.getBestStatements( wdCountry[1].mainsnak.datavalue.value["id"], 'P297' )                if #wdIso3166 > 0 then                   qbIso3166 = string.lower(wdIso3166[1].mainsnak.datavalue.value)                   qbIso3166Class =  ' voy-qb-' .. qbIso3166                else                   qbIso3166Class = ''                end             else                 qbIso3166Class = ''             end          end       end    else       qbIso3166Class = ' voy-qb-' .. qbIso3166    end     -- DEBUG: showing the parameters    -- it was just for development    -- display = display .. '<br />Parameter:<br />' ..  mw.dumpObject(templateArgs)     -- starting the quickbar table    display = display .. '<div class="voy-qb-rightdiv"><table cellspacing="0" class="voy-qb voy-qb-airport' .. qbIso3166Class .. '">'      -- Logo    display = display .. images.GetImage().getEmblemsQuickbar ( qbID, 'L' )     -- the main image    -- taken from Wikidata, if not provided    display = display .. images.GetImage().getMainImageQuickbar ( qbID, coalesce ( templateArgs["bild"], '' ) )     -- heading    -- is mandatory, even if you do not provide it, its shown (with the sitename)    -- initialising with given heading    local qbNamen = coalesce ( templateArgs["namen"], '' )        -- if no heading is provided, get the sitename    if qbNamen == '' then       qbNamen = destinationName    end        -- creating the row with the heading    local trHeader = mw.html.create ( 'tr' )    trHeader:addClass( 'voy-qb-item' )    trHeader:tag('td')       :attr('colspan', 2 )       :addClass('voy-qb-header' )       :wikitext(qbNamen)    -- adding it to the quickbar    display = display .. tostring ( trHeader )        -- general information:    -- an entry is only added when the parameter is used    -- if the parameter is empty, the information is fetched from Wikidata    -- if the parameter is not empty, the local information is used, but mostly compared Wikidata, and maintenance categories are used    -- the parameter with the value "no" deactivates the entry        -- province    local displayString = ''    displayString, provinceCode = province.GetProvince().getProvinceQuickbar ( qbID, coalesce ( templateArgs["provinz"], '' ), coalesce ( templateArgs["provinzlabel"], '' ), coalesce ( templateArgs["staatok"], 'no' ) )    display = display .. displayString        -- altitude    display = display .. pnumber.GetNumber().getNumbersWithUnitQuickbar ( qbID, 'P2044', nil, 0, coalesce ( templateArgs["höhe"], '' ) )     -- IATA Code    display = display .. pstring.GetString().getStringsQuickbar ( qbID, 'P238', nil, coalesce ( templateArgs["iata"], '' ) )     -- ICAO Code    display = display .. pstring.GetString().getStringsQuickbar ( qbID, 'P239', nil, coalesce ( templateArgs["icao"], '' ) )     -- passengers    display = display .. pnumber.GetNumber().getNumbersWithDateQuickbar ( qbID, 'P3872', coalesce ( templateArgs["passagiere"], '' ) )     -- terminals, not available at Wikidata    if templateArgs["terminals"] ~= nil then          -- displaying the given info          trTerminals = mw.html.create ( 'tr' )          trTerminals:addClass('voy-qb-item voy-qb-terminals' )             :tag('th')             :addClass('voy-qb-item-key')             :wikitext('Terminals')          trTerminals:tag('td')             :addClass( 'voy-qb-item-value1' )             :wikitext( templateArgs["terminals"] )          display = display .. tostring ( trTerminals )     end      -- location map     -- the location maop is always shown     -- reading latitude and longitude from Wikidata    local breite    local laenge    breite, laenge = pnumber.GetNumber().getCoordinate( qbID )     -- got coordinates? then creating the map    if breite ~= 0 and laenge ~= 0 then        -- loading the configuration fopr the location maps       local cfgLocmaps = mw.loadData('Modul:Quickbar Ort/Locmaps')        provinceCode = string.lower ( coalesce ( provinceCode, '' ) )        -- determining the locmap, starting with the country code       local locmapCode = qbIso3166        -- some countries alays use province maps (see Modul:Quickbar_Ort/Locmaps)       if cfgLocmaps.LocMapLevel[qbIso3166] ~= nil and provinceCode ~= '' then          locmapCode = provinceCode       end        -- some province maps differ from the 3166 Code       if cfgLocmaps.LocMapNoProvince[provinceCode] ~= nil and provinceCode ~= '' then          locmapCode = cfgLocmaps.LocMapNoProvince[provinceCode]       end        -- some province maps are individually wanted although normally the country map is used       if cfgLocmaps.ForceProvinceMap[provinceCode] ~= nil and provinceCode ~= '' then          locmapCode = cfgLocmaps.ForceProvinceMap[provinceCode]       end        -- is a map-code given manually in the QB? then       if nilIf ( templateArgs["karte"], '' ) ~= nil then          locmapCode = templateArgs["karte"]       end        locmapCode = string.lower ( locmapCode )        -- creating the location map       if locmapCode ~= '' then           local locMap = require('Modul:Location map')          local success, mData = pcall(checkMapObject, locmapCode)           -- location map available?          if success then              -- collecting all parameters             local locMapArgs =                 { args =                    {  map = locmapCode,                       lat = breite,                      long = laenge,                      maptype = coalesce ( nilIf ( templateArgs["kartentyp"], '' ), 'quickbar' ),                      label = '<b>' .. mw.text.trim(mw.ustring.gsub(destinationName, '%s%(.*%)', '' )) .. '</b>'                    }                 }              -- creating the row and adding to the quickbar             local trLocMap = mw.html.create ( 'tr' )             trLocMap:addClass( 'voy-qb-locmap' )             trLocMap:tag('td')                :attr('colspan', 2 )                :wikitext(locMap.locationMap(locMapArgs))             display = display .. tostring ( trLocMap )           else             categories = categories .. '[[Kategorie:Provinz ohne Location map]]'          end        end     end     -- finishing the HTML table    display = display .. '</table></div>'     return display .. categories     end  return qbAirport