local yesno    = require( 'Module:Yesno' ) local images   = require( 'Module:GetImage' ) local locMap   = require( 'Module:Location map' )  -- 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  -- lowering all parameters local function lowerArgs( templateFrame )     local templateArgs = {}    for key,value in pairs ( templateFrame.args ) do       templateArgs[string.lower(key)] = value    end    for key,value in pairs ( templateFrame:getParent().args ) do       templateArgs[string.lower(key)] = value    end    return templateArgs  end  -- generiert Attibute für die Tabelle der Quickbar local function theadAttr ( class, style )    local tableAttr = 'cellspacing="0" class="' .. class ..'"'    if coalesce ( style, '' ) ~= '' then tableAttr = tableAttr .. ' style="' .. style .. '"' end    return tableAttr end  local quickbar = {}  -- erzeugt einen Überschrifteneintrag in der Quickbar function quickbar.theader ( colSpan, text, rowClass )    local class = rowClass or ''    local tr = mw.html.create ( 'tr' )    tr:addClass( class )    tr:tag('td')      :attr('colspan', colSpan )      :addClass('voy-qb-header' )      :wikitext(text)    return tostring ( tr ) end  -- creates a row with a key column and up to three value columns function quickbar.trItemTH ( className, text1, text2, text3, text4 )     local tr = mw.html.create ( 'tr' )    tr:addClass('voy-qb-item ' .. className )       :tag('th')       :addClass('voy-qb-item-key')       :wikitext(text1)    if ( nilIf ( text2, '' ) ~= nil ) then tr:tag('td'):addClass('voy-qb-item-value1'):wikitext(text2) end    if ( nilIf ( text3, '' ) ~= nil ) then tr:tag('td'):addClass('voy-qb-item-value2'):wikitext(text3) end    if ( nilIf ( text4, '' ) ~= nil and nilIf ( text3, '' ) ~= nil ) then tr:tag('td'):addClass('voy-qb-item-value3'):wikitext(text4) end    return tostring ( tr )  end  -- creates a row with an image function quickbar.trImage ( className, imageFile, colSpan )     if coalesce ( imageFile, '' ) == '' then return '' end     local tr = mw.html.create ( 'tr' )    tr:addClass('voy-qb-item ' .. className )      :tag('td')      :attr('colspan', colSpan)      :addClass('voy-qb-imagecell')         :tag('div')         :addClass('voy-qb-image')         :wikitext(imageFile)    return tostring ( tr )   end  function quickbar.trTwoImages ( className, className1, className2, imageFile1, imageFile2, colSpan )    if ( not colSpan ) then colSpan = 2 end        local td1 = mw.html.create ( 'td' )    td1:addClass( className1 )         :tag('div')         :addClass('voy-qb-image')         :wikitext(imageFile1)             local td2 = mw.html.create ( 'td' )    td2:addClass( className2 )         :tag('div')         :addClass('voy-qb-image')         :wikitext(imageFile2)             local tr = mw.html.create ( 'tr' )    tr:addClass('voy-qb-item ' .. className )      :tag('td')      :attr('colspan', colSpan)      :addClass('voy-qb-imagecell')         :tag('table')            :addClass('voy-qb-twoimages')            :tag('tr')               :node(td1)               :node(td2)    return tostring ( tr ) end  function quickbar.locmap ( colSpan, map, rowClass )    local class = rowClass or ''    local tr = mw.html.create ( 'tr' )    tr:addClass('voy-qb-locmap '..class)      :tag('td')      :attr('colspan', colSpan)      :wikitext(locMap.locationMap(map))    return tostring ( tr ) end  function quickbar.hr ( colSpan, rowClass )    local class = rowClass or ''    local hr = mw.html.create ( 'tr' )    hr:addClass('voy-qb-line '..class)      :tag('td')      :attr('colspan', colSpan)        :tag('hr')    return tostring ( hr ) end   -- Functions te be usen in Templates  -- Creates the Attributes of a infobox table -- used in Vorlage:Quickbar table begin -- it creates the attributes only, because the templates creates just the opening tag function quickbar.qb_table ( frame )     local args = lowerArgs ( frame )    local pos = coalesce ( nilIf ( args.pos, '' ), 'right' )    local classes = 'voy-qb ' .. coalesce ( args.tableclass, '' )     if pos == 'right' then classes = classes .. ' voy-qb-right' end    if pos == 'rechts' then classes = classes .. ' voy-qb-right' end    if pos == 'left' then classes = classes .. ' voy-qb-left' end    if pos == 'links' then classes = classes .. ' voy-qb-left' end          if yesno ( coalesce ( args.topborder, 'no' ), false ) then classes = classes .. ' voy-qb-topborder' end        return theadAttr ( classes, coalesce ( args["1"], '' ) ) end   -- adds a header row to the infobox function quickbar.qb_header ( frame )     local args = lowerArgs ( frame )    return quickbar.theader (        coalesce ( args.colspan, '2' ),        coalesce ( args["1"], args.text, 'Titel' ),        coalesce ( args.rowclass, '' )    )  end  -- adds a row to the info box containing a key column and up to three value columns function quickbar.qb_item ( frame )     local args = lowerArgs ( frame )    return quickbar.trItemTH (        coalesce ( args.rowclass, '' ),        coalesce ( args.heading, '' ),        coalesce ( args.value, '' ),        coalesce ( args.value2, '' ),        coalesce ( args.value3, '' )     )  end  -- adds a row with an immage an image and an optoinal heading -- if no image is defined, Wikidata can optinally be used function quickbar.qb_image( frame )     local args = lowerArgs ( frame )    local display = ''    local image = ''     -- is a heading defined?    if ( coalesce ( args.heading, '' ) ~= '' ) then        display = quickbar.theader (           coalesce ( args.colspan, '2' ),           coalesce ( args.heading, '' ),           coalesce ( args.rowclass, '' )        )    end     image = coalesce ( args.image, '' )     if image == '' then       local wdImage = coalesce ( images.GetImage().getImage ( args.id, coalesce ( args.wikidataproperty, 'P18' ) ), '' )        if wdImage ~= '' then                   image = '[[File:' .. wdImage .. '|' .. coalesce ( args.wikidatafileparameter, '296px' ) .. ']]'       end    end     if image ~= '' then        return display .. quickbar.trImage (           coalesce ( args.rowclass, '' ),           image,           coalesce ( args.colspan, '2' )       )    else        return display     end  end  -- adds a horizonal line to separate entries visually function quickbar.qb_line ( frame )     local args = lowerArgs ( frame )    return quickbar.hr ( coalesce ( args.colspan, '2' ), coalesce ( args.rowclass, '' ) )     end  return quickbar