--[=[ getString 2023-10-04 * local getStringsWithLanguage (internal use) * getStrings * getStringsQuickbar * getSocialMediaQuickbar ]=] local GetString = {}  -- maximum number of entries in quickbar local maxDisplayQuickbar = 3  -- categories and properties for data evaluation local gsp = require ( 'Modul:GetString/Properties' )  -- modules for linking and formatting phone number -- loaded later,if necessary local cm local lp local args = {}  -- 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   -- getStringsWithLanguage() -> just for internal use. it delivers the url to the public functions -- gets text of a property -- it supports the datatypes "string", "monolingualtext" and "external-id" --   id: Wikidata-ID (own, if not provided) --   property: requested property local getStringsWithLanguage = function ( id, property )     -- local variables    -- ID of the item    -- Determined, if not provided    local localID = id or mw.wikibase.getEntityIdForCurrentPage() or ''        -- compatibility to existing modules and templates:    -- some use the keyword "self" for using the own entity-ID    if ( ( localID == 'self' ) or ( localID == '' ) ) then       localID = mw.wikibase.getEntityIdForCurrentPage() or ''    end     -- no Wikidata object    if localID == '' then       return {}, '', ''    end        -- maintenance categories    local maintenanceCategory = ''     -- property    local requestedProperty = property or 'none';    if string.sub(requestedProperty,1,1) ~= 'P' then       requestedProperty = 'none'    end     -- no property given: category and exit    if requestedProperty == 'none' then       maintenanceCategory = maintenanceCategory .. gsp.noProperty       return {}, localID, maintenanceCategory    end     -- property unknown in table "gsp": category but continue    if not gsp[requestedProperty] then       maintenanceCategory = maintenanceCategory .. gsp.unknownProperty    end     -- phone numner? load the linkphone modules    if requestedProperty == 'P1329' then       cm = require( 'Module:CountryData' )       lp = require( 'Module:LinkPhone' )    end     -- getting the values    local wdStatements = mw.wikibase.getBestStatements( localID, requestedProperty )     -- running through the array and store it in a simple table    local wdValues = {}    local language = ''    for i, entry in pairs ( wdStatements ) do        -- check for string       if entry.mainsnak.datatype == 'string' then           -- phone numner? then format and link it          -- and adding to the list          if requestedProperty == 'P1329' then             args = {                phone      = entry.mainsnak.datavalue.value,                format     = true,                isFax      = false,                isTollfree = false             }             args.cc, args.size = cm.getCountryCode()             wdValues[i] = lp.linkPhoneNumbers( args )          else             wdValues[i] = entry.mainsnak.datavalue.value          end        end -- if entry.mainsnak.datatype == 'string'        -- check for monolingualtext       if entry.mainsnak.datatype == 'monolingualtext' then           -- getting the amount, converted into a number          language = entry.mainsnak.datavalue.value.language or i           -- adding to the list          if not wdValues[language] then             wdValues[language] = entry.mainsnak.datavalue.value.text          end        end -- if entry.mainsnak.datatype == 'monolingualtext'        -- check for external-id       if entry.mainsnak.datatype == 'external-id' then           wdValues[i] = entry.mainsnak.datavalue.value        end -- if entry.mainsnak.datatype == 'external-id'        language = ''     end -- for i, entry in ipairs ( wdStatements )     -- adding category    if #wdValues > 0 then       maintenanceCategory = maintenanceCategory .. '[[Kategorie:Seiten, die die Wikidata-Eigenschaft ' .. requestedProperty .. ' benutzen]]'    end      table.sort( wdValues, function(a,b) return a < b end )     return wdValues, localID, maintenanceCategory   end   -- getStrings()  -- gets the text of a property including its language --   first parameters: see internal function --   values: --      - single: Only one (first) entry is shown --      - all (standard): All entries ar shown --   show: --      - text (standard): just the text --      - text_with_language: text with language in brackets --      - symbol_with_link: for social media: displays the link as symbol --   delimiter: delmiter between the numbers; standard is comma and breakable space --   max: if the number of rows exceeds the given maximum, it will be displayed as a range GetString.getStrings = function ( id, property, values, show, delimiter, max )     -- returning String    local returnString = ''     -- values    local requestedValues = values or 'all'     -- WD-Values    local stringList = {}    local wikidataID = ''    local categories = ''    stringList, wikidataID, categories = getStringsWithLanguage ( id, property, values )     -- show options    local stringShow = coalesce ( nilIf ( show, '' ), 'text' )     -- no delimiter in front of the first entry    local stringDelimiter = ''     -- maximum    local maxDisplay = tonumber( max ) or 0    local showRange = false     -- displaying the values    local allValues = true    local numberOfRows = #stringList    if ( maxDisplay > 0 ) and ( numberOfRows > maxDisplay ) then       showRange = true    end    local rowNumber = 1    for key, value in pairs( stringList ) do        if allValues then           if showRange and ( rowNumber + 1 == numberOfRows ) then              returnString = returnString .. '…'           elseif  not ( showRange ) or ( rowNumber == 1 ) or ( rowNumber == numberOfRows ) then              -- displaying with language             if stringShow == 'text_with_language' then                 if key == '1' then                   returnString = returnString .. stringDelimiter .. value                else                   returnString = returnString .. stringDelimiter .. value .. ' (' .. key .. ')'                end              -- displaying social media with string             elseif stringShow == 'symbol_with_link' then                 local span = mw.html.create ( 'span' )                local href = ''                  -- property specific classes and links                if gsp[property] ~= nil then                    if gsp[property].cssSymbolClass ~= nil then                      span:addClass('voy-social-media voy-social-media-icon ' .. gsp[property].cssSymbolClass)                   end                    if gsp[property].link ~= nil then                      span:wikitext('[' .. mw.ustring.format ( gsp[property].link, value ) .. ' <span title="' .. gsp[property].label .. '" data-icon="facebook" style="color-adjust:exact;-webkit-print-color-adjust:exact;print-color-adjust:exact"> </span>]' )                   else                      span:wikitext(value)                      categories = categories .. '[[Kategorie:Social-Media-Link nicht konfiguriert]]'                   end                    returnString = returnString .. stringDelimiter .. tostring(span)                 end              -- displaying just the text             else                 returnString = returnString .. stringDelimiter .. value             end                          -- setting the delimiter after the first entry             if not ( showRange ) then                stringDelimiter = delimiter or ', '             end              -- Abbruch?             if requestedValues == 'single' then                allValues = false             end           end        end        rowNumber = rowNumber + 1     end     -- providing the list of capitals    return returnString .. categories  end   -- Get the string as wiki markup for quickbars (infoboxes) -- "values" is set to "all", if not provided -- "label" is an optional text, shwon as key in the left side of the quickbar entry GetString.getStringsQuickbar = function ( id, property, values, wikiValue, label )     -- checking property    if coalesce ( property, '' ) == '' then       return ''    end        -- getting the link with the base function above    local wikidataID    local wikidataStrings = {}    local wikidataCategories    wikidataStrings, wikidataID, wikidataCategories = getStringsWithLanguage ( id, property )        -- if it is taken from wikidata, this variable provides an additional class for: MediaWiki:Gadget-Wikidata-Content.css    -- space is needed becaus its simply added to the existing class string    local wikidataClass = ' voy-wikidata-content'     -- comparing a possibly given value with Wikidata    local category = ''     -- is Wikidata value not available?    local wikidataNoData = false    if wikidataID == '' then       if gsp[property] ~= nil then          category = gsp[property].noData          wikidataNoData = true       end       wikidataClass = ''    end     -- values    local requestedValues = coalesce ( nilIf ( values, '' ), 'all' )     -- creating text for display    local returnString = ''    local stringDelimiter = ''    local allValues = true     -- maximum    local showRange = false     -- Wikidate comparision tags    -- is Wikidata available    local wikidataAvailable = true     -- is one of the entries equal to the wiki value?    local wikidataOneIsEqual = false    local wikidataEqualData = false     -- are none of the entries equal to the wiki value?    -- starting with false    -- later initialised to true, when local wiki value is given    local wikidataNothingIsEqual = false    local wikidataNoEqualData = false     -- processing nil value for wikiValue    if wikiValue == nil then        wikiValue = ''     end        -- wikivalues, that can be interpreted as "TRUE" are removed and Wikidata is used    -- it's used to switch entries on and off in Quickbars    if wikiValue =='yes'       or wikiValue == 'y'       or wikiValue == 'true'       or wikiValue == 'wahr'       or wikiValue == 'ja'       or wikiValue == 'j'    then       wikiValue = ''    end     -- processing wikiValue    if wikiValue ~= '' then       -- starting with TRUE by default       -- set to FALSE if one value is equal       wikidataNothingIsEqual = true       wikidataNoEqualData = true    end     -- displaying the values and compare with Wikidata    local allValues = true    local numberOfRows = #wikidataStrings    if ( maxDisplayQuickbar > 0 ) and ( numberOfRows > maxDisplayQuickbar ) then       showRange = true    end    local rowNumber = 1    for key, value in pairs( wikidataStrings ) do        if allValues then           if showRange and ( rowNumber + 1 == numberOfRows ) then              returnString = returnString .. '…'           elseif  not ( showRange ) or ( rowNumber == 1 ) or ( rowNumber == numberOfRows ) then              returnString = returnString .. stringDelimiter .. value                          -- setting the delimiter after the first entry             if not ( showRange ) then                stringDelimiter = ', '             end              -- Abbruch?             if requestedValues == 'single' then                allValues = false             end           end        end        -- comparing with Wikidata       if wikiValue ~= '' then          if value == wikiValue then             wikidataOneIsEqual = true          end       end        rowNumber = rowNumber + 1     end     -- phone numner? then format and link it    if wikiValue ~= '' and coalesce ( property, '' ) == 'P1329' then       cm = require( 'Module:CountryData' )       lp = require( 'Module:LinkPhone' )       args = {          phone      = wikiValue,          format     = true,          isFax      = false,          isTollfree = false       }       args.cc, args.size = cm.getCountryCode()       wikiValue = lp.linkPhoneNumbers( args )    end     -- saving wikidata value in case of a local string is used    local wikidataString = returnString     -- do not state "different values", when no wikidata value is available    if numberOfRows == 0 then       wikidataNoEqualData = false       wikidataClass = ''    end     -- Setting Wikidata categories    if wikiValue ~= '' then        -- setting the categories       if gsp[property] ~= nil then           if wikidataOneIsEqual then              category = category .. gsp[property].equalData             wikidataEqualData = true          end           if wikidataNothingIsEqual and numberOfRows > 0 then              category = category .. gsp[property].noEqualData             wikidataNoEqualData = true          end        end        -- displaying the wikiValue       returnString = wikiValue        -- removing the WD-Class       wikidataClass = ''     end     -- displaying only, if any data available    local trClass = ''    if returnString == '' then       trClass = ' voy-qb-empty'    end     -- creating the table row     local tr = mw.html.create ( 'tr' )        -- first table cell (heading)    local trLabel = label or '&nbsp;'    if gsp[property] then         trClass = ' ' .. gsp[property].cssQBClass .. trClass         if trLabel == '&nbsp;' then            trLabel = gsp[property].label         end    end    tr:addClass('voy-qb-item' .. trClass )       :tag('th')       :addClass('voy-qb-item-key')       :wikitext(trLabel)        -- second table cell (the requested number)    if wikidataNoData then       tr:tag('td')          :addClass( 'voy-qb-item-value1 voy-qb-item-value-nowikidata' .. wikidataClass )             :attr('data-wikidata-id',wikidataID)             :attr('title','Kein(e) ' .. trLabel .. ' auf Wikidata' )          :wikitext( returnString )    elseif wikidataEqualData then       tr:tag('td')             :addClass( 'voy-qb-item-value1 voy-qb-item-value-wikidata-equal' .. wikidataClass )             :attr('data-wikidata-id',wikidataID)             :attr('data-wikidata-value',wikidataString)             :attr('title','Daten identisch - Angabe auf Wikidata: ' .. wikidataString)             :wikitext( returnString )    elseif wikidataNoEqualData then       tr:tag('td')             :addClass( 'voy-qb-item-value1 voy-qb-item-value-wikidata-noequal' .. wikidataClass )             :attr('data-wikidata-id',wikidataID)             :attr('data-wikidata-value',wikidataString)             :attr('title','Daten unterschiedlich - Angabe auf Wikidata: ' .. wikidataString )             :wikitext( returnString )    else       tr:tag('td')             :addClass( 'voy-qb-item-value1' .. wikidataClass )             :attr('data-wikidata-id',wikidataID)             :attr('data-wikidata-value',wikidataString)             :wikitext( returnString )    end     -- returning the row    return tostring ( tr ) .. category .. wikidataCategories     end     -- Gets the socialmedia-Links and creates a quickbar row GetString.getSocialMediaQuickbar = function ( id )     -- creating the wikitext for the row    -- facebook profile    local socialmedia = coalesce ( GetString.getStrings ( id, 'P2013', 'all', 'symbol_with_link' ) )     -- facebook page    socialmedia = socialmedia .. coalesce ( GetString.getStrings ( id, 'P4003', 'all', 'symbol_with_link' ) )     -- facebook places id    socialmedia = socialmedia .. coalesce ( GetString.getStrings ( id, 'P1997', 'all', 'symbol_with_link' ) )     -- instagram username    socialmedia = socialmedia .. coalesce ( GetString.getStrings ( id, 'P2003', 'all', 'symbol_with_link' ) )     -- X username    socialmedia = socialmedia .. coalesce ( GetString.getStrings ( id, 'P2002', 'all', 'symbol_with_link' ) )     -- YouTube-Kanal    socialmedia = socialmedia .. coalesce ( GetString.getStrings ( id, 'P2397', 'all', 'symbol_with_link' ) )     -- Hashtag    socialmedia = socialmedia .. coalesce ( GetString.getStrings ( id, 'P2572', 'all', 'symbol_with_link' ) )     -- creating only, when any social media is available    if socialmedia ~= '' then        -- creating the table row        local tr = mw.html.create ( 'tr' )        tr:addClass('voy-qb-item voy-qb-item-social-media' )          :tag('th')          :addClass('voy-qb-item-key')          :wikitext( 'Soziale Medien' )        tr:tag('td')          :addClass( 'voy-qb-item-value1' )          :wikitext(socialmedia)        -- returning the row       return tostring ( tr )     else -- socialmedia == '' then        return ''     end -- if socialmedia ~= '' then  end  -- Providing template access local p = {}  function p.getStrings( frame )    return GetString.getStrings( frame.args[ 1 ], frame.args[ 2 ], frame.args[ 3 ], frame.args[ 4 ], frame.args[ 5 ], frame.args[ 6 ] ) or "" end  function p.getStringsQuickbar( frame )    return GetString.getStringsQuickbar( frame.args[ 1 ], frame.args[ 2 ], frame.args[ 3 ], frame.args[ 4 ] ) or "" end  function p.getSocialMediaQuickbar( frame )    return GetString.getSocialMediaQuickbar( frame.args[ 1 ] ) or "" end  -- for usage in other modules -- using it the following way: -- -- local GetString = require( 'Module:GetString' ) -- foo = getString.GetString().xxx( id, lang ) function p.GetString()    return GetString end  return p