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--[[ ----------------------------------
 
     Lua module implementing the {{webarchive}} template. 
 
       A merger of the functionality of three templates: {{wayback}}, {{webcite}} and {{cite archives}}
 
  ]]
 
local p = {}
 
--[[--------------------------< inlineError >-----------------------
 
     Critical error. Render output completely in red. Add to tracking category.
 
 ]]
 
local function inlineError(arg, msg)
 
  track["Category:Webarchive template errors"] = 1
  return '<span style="font-size:100%" class="error citation-comment">Error in webarchive template: Check <code style="color:inherit; border:inherit; padding:inherit;">&#124;' .. arg .. '=</code> value. ' .. msg .. '</span>'
 
end
 
--[[--------------------------< inlineRed >-----------------------
 
      Render a text fragment in red, such as a warning as part of the final output.
      Add tracking category.
 
 ]]
 
local function inlineRed(msg, trackmsg)
 
  if trackmsg == "warning" then
    track["Category:Webarchive template warnings"] = 1 
  elseif trackmsg == "error" then
    track["Category:Webarchive template errors"] = 1 
  end
 
  return '<span style="font-size:100%" class="error citation-comment">' .. msg .. '</span>'
 
end
 
--[[--------------------------< trimArg >-----------------------
 
     trimArg returns nil if arg is "" while trimArg2 returns 'true' if arg is "" 
     trimArg2 is for args that might accept an empty value, as an on/off switch like nolink=
 
 ]]
 
local function trimArg(arg)
  if arg == "" or arg == nil then
    return nil
  else
    return mw.text.trim(arg)
  end
end
local function trimArg2(arg)
  if arg == nil then
    return nil
  else
    return mw.text.trim(arg)
  end
end
 
--[[--------------------------< base62 >-----------------------
 
     Convert base-62 to base-10
     Credit: https://de.wikipedia.org/wiki/Modul:Expr 
 
  ]]
 
local function base62( value )
 
    local r = 1
 
    if value:match( "^%w+$" ) then
        local n = #value
        local k = 1
        local c
        r = 0
        for i = n, 1, -1 do
            c = value:byte( i, i )
            if c >= 48  and  c <= 57 then
                c = c - 48
            elseif c >= 65  and  c <= 90 then
                c = c - 55
            elseif c >= 97  and  c <= 122 then
                c = c - 61
            else    -- How comes?
                r = 1
                break    -- for i
            end
            r = r + c * k
            k = k * 62
        end -- for i
    end
    return r
end 
 
--[[--------------------------< tableLength >-----------------------
 
      Given a 1-D table, return number of elements
 
  ]]
 
local function tableLength(T)
  local count = 0
  for _ in pairs(T) do count = count + 1 end
  return count
end
 
 
--[[--------------------------< dateFormat >-----------------------
 
     Given a date string, return its format: dmy, mdy, iso, ymd
       If unable to determine return nil
 
  ]]
 
local function dateFormat(date)
 
  local dt = {}
  dt.split = {}
 
  dt.split = mw.text.split(date, "-")
  if tableLength(dt.split) == 3 then
    if tonumber(dt.split[1]) > 1900 and tonumber(dt.split[1]) < 2200 and tonumber(dt.split[2]) and tonumber(dt.split[3]) then
      return "iso"
    else
      return nil
    end
  end  
 
  dt.split = mw.text.split(date, " ")
  if tableLength(dt.split) == 3 then
    if tonumber(dt.split[3]) then
      if tonumber(dt.split[3]) > 1900 and tonumber(dt.split[3]) < 2200 then
        if tonumber(dt.split[1]) then
          return "dmy"
        else
          return "mdy"
        end 
      else
        if tonumber(dt.split[1]) then
          if tonumber(dt.split[1]) > 1900 and tonumber(dt.split[1]) < 2200 then
            return "ymd"
          end
        end
      end
    end
  end
  return nil
 
end
 
--[[--------------------------< makeDate >-----------------------
 
     Given a zero-padded 4-digit year, 2-digit month and 2-digit day, return a full date in df format
     df = mdy, dmy, iso, ymd
 
 ]]
 
local function makeDate(year, month, day, df)
 
  if not year or year == "" or not month or month == "" or not day or day == "" then
    return nil
  end
 
  local zmonth = month                                                      -- month with leading 0
  month = month:match("0*(%d+)")                                            -- month without leading 0
  if tonumber(month) < 1 or tonumber(month) > 12 then
    return year
  end
  local nmonth = os.date("%B", os.time{year=2000, month=month, day=1} )     -- month in name form       
  if not nmonth then
    return year
  end
 
  local zday = day
  day = zday:match("0*(%d+)")
  if tonumber(day) < 1 or tonumber(day) > 31 then
    if df == "mdy" or df == "dmy" then
      return nmonth .. " " .. year
    elseif df == "iso" then
      return year .. "-" .. zmonth 
    elseif df == "ymd" then
      return year .. " " .. nmonth
    else
      return nmonth .. " " .. year
    end
  end                                       
 
  if df == "mdy" then
    return nmonth .. " " .. day .. ", " .. year         -- September 1, 2016
  elseif df == "dmy" then
    return day .. " " .. nmonth .. " " .. year          -- 1 September 2016
  elseif df == "iso" then
    return year .. "-" .. zmonth .. "-" .. zday         -- 2016-09-01
  elseif df == "ymd" then
    return year .. " " .. nmonth .. " " .. cday          -- 2016 September 1
  else
    return nmonth .. " " .. day .. ", " .. year         -- September 1, 2016
  end
 
end
 
 
--[[--------------------------< decodeWebciteDate >-----------------------
 
      Given a URI-path to Webcite (eg. /67xHmVFWP) return the encoded date in df format
 
  ]]
local function decodeWebciteDate(path, df)
 
    local dt = {}
    dt.split = {}
 
    dt.split = mw.text.split(path, "/")
 
    -- valid URL formats that are not base62
 
    -- http://www.webcitation.org/query?id=1138911916587475
    -- http://www.webcitation.org/query?url=http..&date=2012-06-01+21:40:03
    -- http://www.webcitation.org/1138911916587475
    -- http://www.webcitation.org/cache/73e53dd1f16cf8c5da298418d2a6e452870cf50e
    -- http://www.webcitation.org/getfile.php?fileid=1c46e791d68e89e12d0c2532cc3cf629b8bc8c8e
 
    if mw.ustring.find( dt.split[2], "query", 1, plain) or 
       mw.ustring.find( dt.split[2], "cache", 1, plain) or
       mw.ustring.find( dt.split[2], "getfile", 1, plain) or
       tonumber(dt.split[2]) then
      return "query"
    end
 
    dt.full = os.date("%Y %m %d", string.sub(string.format("%d", base62(dt.split[2])),1,10) )
    dt.split = mw.text.split(dt.full, " ")
    dt.year = dt.split[1]
    dt.month = dt.split[2]
    dt.day = dt.split[3]
 
    if not tonumber(dt.year) or not tonumber(dt.month) or not tonumber(dt.day) then
      return inlineRed("[Date error] (1)", "error")
    end
 
    if tonumber(dt.month) > 12 or tonumber(dt.day) > 31 or tonumber(dt.month) < 1 then
      return inlineRed("[Date error] (2)", "error")
    end
    if tonumber(dt.year) > tonumber(os.date("%Y")) or tonumber(dt.year) < 1900 then
      return inlineRed("[Date error] (3)", "error")
    end
 
    fulldate = makeDate(dt.year, dt.month, dt.day, df)
    if not fulldate then
      return inlineRed("[Date error] (4)", "error")
    else
      return fulldate
    end
 
end
 
--[[--------------------------< snapDateToString >-----------------------
 
Given a URI-path to Wayback (eg. /web/20160901010101/http://example.com )
  return the formatted date eg. "September 1, 2016" in df format 
  Handle non-digits in snapshot ID such as "re_" and "-" and "*"
 
 ]]
 
local function decodeWaybackDate(path, df)
 
    local snapdate, snapdatelong, currdate, fulldate
 
    local safe = path
    snapdate = string.gsub(safe, "^/w?e?b?/?", "")                      -- Remove leading "/web/" or "/"
    safe = snapdate
    local N = mw.text.split(safe, "/")
    snapdate = N[1]
    if snapdate == "*" then                                             -- eg. /web/*/http..
      return "index"
    end
    safe = snapdate
    snapdate = string.gsub(safe, "[a-z][a-z]_[0-9]?$", "")              -- Remove any trailing "re_" from date 
    safe = snapdate
    snapdate = string.gsub(safe, "[-]", "")                             -- Remove dashes from date eg. 2015-01-01 
    safe = snapdate
    snapdate = string.gsub(safe, "[*]$", "")                            -- Remove trailing "*" 
 
    if not tonumber(snapdate) then
      return inlineRed("[Date error] (2)", "error")
    end
    local dlen = string.len(snapdate)
    if dlen < 4 then
      return inlineRed("[Date error] (3)", "error")
    end
    if dlen < 14 then
      snapdatelong = snapdate .. string.rep("0", 14 - dlen)
    else
      snapdatelong = snapdate
    end
    local year = string.sub(snapdatelong, 1, 4)
    local month = string.sub(snapdatelong, 5, 6)
    local day = string.sub(snapdatelong, 7, 8)
    if not tonumber(year) or not tonumber(month) or not tonumber(day) then
      return inlineRed("[Date error] (4)", "error")
    end
    if tonumber(month) > 12 or tonumber(day) > 31 or tonumber(month) < 1 then
      return inlineRed("[Date error] (5)", "error")
    end
    currdate = os.date("%Y")
    if tonumber(year) > tonumber(currdate) or tonumber(year) < 1900 then
      return inlineRed("[Date error] (6)", "error")
    end
 
    fulldate = makeDate(year, month, day, df)
    if not fulldate then
      return inlineRed("[Date error] (7)", "error")
    else
      return fulldate
    end
 
end
 
 
--[[--------------------------< serviceName >-----------------------
 
     Given a domain extracted by mw.uri.new() (eg. web.archive.org) set tail string and service ID
 
  ]]
 
local function serviceName(host, nolink)
 
  local tracking = "Category:Webarchive template other archives"
 
  local bracketopen = "[["
  local bracketclose = "]]"
  if nolink then
    bracketopen = ""
    bracketclose = ""
  end
 
  ulx.url1.service = "other"
  ulx.url1.tail = " at " .. ulx.url1.host .. " " .. inlineRed("Error: unknown archive URL")
 
  if mw.ustring.find( host, "archive.org", 1, plain ) then
    ulx.url1.service = "wayback"
    ulx.url1.tail = " at the " .. bracketopen .. "Wayback Machine" .. bracketclose
    tracking = "Category:Webarchive template wayback links"
  elseif mw.ustring.find( host, "webcitation.org", 1, plain ) then
    ulx.url1.service = "webcite"
    ulx.url1.tail = " at " .. bracketopen .. "WebCite" .. bracketclose
    tracking = "Category:Webarchive template webcite links"
  elseif mw.ustring.find( host, "archive.is", 1, plain ) then
    ulx.url1.service = "archiveis"
    ulx.url1.tail = " at " .. bracketopen .. "Archive.is" .. bracketclose
    tracking = "Category:Webarchive template archiveis links"
  elseif mw.ustring.find( host, "archive.fo", 1, plain ) then
    ulx.url1.service = "archiveis"
    ulx.url1.tail = " at " .. bracketopen .. "Archive.is" .. bracketclose
    tracking = "Category:Webarchive template archiveis links"
  elseif mw.ustring.find( host, "archive.today", 1, plain ) then
    ulx.url1.service = "archiveis"
    ulx.url1.tail = " at " .. bracketopen .. "Archive.is" .. bracketclose
    tracking = "Category:Webarchive template archiveis links"
  elseif mw.ustring.find( host, "archive.il", 1, plain ) then
    ulx.url1.service = "archiveis"
    ulx.url1.tail = " at " .. bracketopen .. "Archive.is" .. bracketclose
    tracking = "Category:Webarchive template archiveis links"
  elseif mw.ustring.find( host, "archive.ec", 1, plain ) then
    ulx.url1.service = "archiveis"
    ulx.url1.tail = " at " .. bracketopen .. "Archive.is" .. bracketclose
    tracking = "Category:Webarchive template archiveis links"
  elseif mw.ustring.find( host, "archive[-]it.org", 1, plain ) then
    ulx.url1.service = "archiveit"
    ulx.url1.tail = " at " .. bracketopen .. "Archive-It" .. bracketclose
  elseif mw.ustring.find( host, "arquivo.pt", 1, plain) then
    ulx.url1.tail = " at the " .. "Portuguese Web Archive" 
  elseif mw.ustring.find( host, "loc.gov", 1, plain ) then
    ulx.url1.tail = " at the " .. bracketopen .. "Library of Congress" .. bracketclose
  elseif mw.ustring.find( host, "webharvest.gov", 1, plain ) then
    ulx.url1.tail = " at the " .. bracketopen .. "National Archives and Records Administration" .. bracketclose
  elseif mw.ustring.find( host, "bibalex.org", 1, plain ) then
    ulx.url1.tail = " at " .. "[[Bibliotheca_Alexandrina#Internet_Archive_partnership|Bibliotheca Alexandrina]]"
  elseif mw.ustring.find( host, "collectionscanada", 1, plain ) then
    ulx.url1.tail = " at the " .. "Canadian Government Web Archive"
  elseif mw.ustring.find( host, "haw.nsk", 1, plain ) then
    ulx.url1.tail = " at the " .. "Croatian Web Archive (HAW)"
  elseif mw.ustring.find( host, "veebiarhiiv.digar.ee", 1, plain ) then
    ulx.url1.tail = " at the " .. "Estonian Web Archive"
  elseif mw.ustring.find( host, "vefsafn.is", 1, plain ) then
    ulx.url1.tail = " at the " .. "[[National and University Library of Iceland]]"
  elseif mw.ustring.find( host, "proni.gov", 1, plain ) then
    ulx.url1.tail = " at the " .. bracketopen .. "Public Record Office of Northern Ireland" .. bracketclose
  elseif mw.ustring.find( host, "uni[-]lj.si", 1, plain ) then
    ulx.url1.tail = " at the " .. "Slovenian Web Archive"
  elseif mw.ustring.find( host, "stanford.edu", 1, plain ) then
    ulx.url1.tail = " at the " .. "[[Stanford University Libraries|Stanford Web Archive]]"
  elseif mw.ustring.find( host, "nationalarchives.gov.uk", 1, plain ) then
    ulx.url1.tail = " at the " .. bracketopen .. "UK Government Web Archive" .. bracketclose
  elseif mw.ustring.find( host, "parliament.uk", 1, plain ) then
    ulx.url1.tail = " at the " .. bracketopen .. "UK Parliament's Web Archive" .. bracketclose
  elseif mw.ustring.find( host, "webarchive.org.uk", 1, plain ) then
    ulx.url1.tail = " at the " .. bracketopen .. "UK Web Archive" .. bracketclose
  elseif mw.ustring.find( host, "nlb.gov.sg", 1, plain ) then
    ulx.url1.tail = " at " .. "Web Archive Singapore" 
  elseif mw.ustring.find( host, "pandora.nla.gov.au", 1, plain ) then
    ulx.url1.tail = " at " .. bracketopen .. "Pandora Archive" .. bracketclose 
  elseif mw.ustring.find( host, "perma.cc", 1, plain ) then
    ulx.url1.tail = " at " .. bracketopen .. "Perma.cc" .. bracketclose
  elseif mw.ustring.find( host, "perma-archives.cc", 1, plain ) then
    ulx.url1.tail = " at " .. bracketopen .. "Perma.cc" .. bracketclose
  elseif mw.ustring.find( host, "screenshots.com", 1, plain ) then
    ulx.url1.tail = " at Screenshots" 
  elseif mw.ustring.find( host, "wikiwix.com", 1, plain ) then
    ulx.url1.tail = " at Wikiwix" 
  elseif mw.ustring.find( host, "freezepage.com", 1, plain ) then
    ulx.url1.tail = " at Freezepage" 
  elseif mw.ustring.find( host, "webcache.googleusercontent.com", 1, plain ) then
    ulx.url1.tail = " at Google Cache" 
  else
    tracking = "Category:Webarchive template unknown archives"
  end
 
  track[tracking] = 1
 
end
 
--[[--------------------------< parseExtraArgs >-----------------------
 
     Parse numbered arguments starting at 2, such as url2..url10, date2..date10, title2..title10
       For example: {{webarchive |url=.. |url4=.. |url7=..}}
         Three url arguments not in numeric sequence (1..4..7). 
         Function only processes arguments numbered 2 or greater (in this case 4 and 7)
         It creates numeric sequenced table entries like:
           urlx.url2.url = <argument value for url4>
           urlx.url3.url = <argument value for url7>
       Returns the number of URL arguments found numbered 2 or greater (in this case returns "2")
 
 ]]
 
local function parseExtraArgs()
 
  local i, j, argurl, argurl2, argdate, argtitle
 
  j = 2
  for i = 2, maxurls do
    argurl = "url" .. i
    if trimArg(args[argurl]) then
      argurl2 = "url" .. j
      ulx[argurl2] = {}
      ulx[argurl2]["url"] = args[argurl]
      argdate = "date" .. j
      if trimArg(args[argdate]) then
        ulx[argurl2]["date"] = args[argdate]
      else
        ulx[argurl2]["date"] = inlineRed("[Date missing]", "warning")
      end
      argtitle = "title" .. j
      if trimArg(args[argtitle]) then
        ulx[argurl2]["title"] = args[argtitle]
      else
        ulx[argurl2]["title"] = nil
      end
      j = j + 1
    end
  end
 
  if j == 2 then
    return 0
  else
    return j - 2
  end
 
end
 
--[[--------------------------< comma >-----------------------
 
     Given a date string, return "," if it's MDY 
 
  ]]
 
local function comma(date)
  local N = mw.text.split(date, " ")
  local O = mw.text.split(N[1], "-") -- for ISO
  if O[1] == "index" then return "" end
  if not tonumber(O[1]) then
    return ","
  else
    return ""
  end
end
 
--[[--------------------------< createTracking >-----------------------
 
     Return data in track[] ie. tracking categories
 
  ]]
 
local function createTracking()
 
  local sand = ""
  if tableLength(track) > 0 then                        
    for key,_ in pairs(track) do
      sand = sand .. "[[" .. key .. "]]"
    end
  end
  return sand
 
end
 
--[[--------------------------< createRendering >-----------------------
 
     Return a rendering of the data in ulx[][]
 
  ]]
 
local function createRendering()
 
    local sand, displayheader, displayfield
 
    local period1 = ""   -- For backwards compat with {{wayback}}
    local period2 = "."                                                            
 
    local indexstr = "archived"
    if ulx.url1.date == "index" then
      indexstr = "archive"
    end  
                                                                                          -- For {{wayback}}, {{webcite}}
 
    if ulx.url1.format == "none" then                                                     
      if not ulx.url1.title and not ulx.url1.date then                                    -- No title. No date
        sand = "[" .. ulx.url1.url .. " Archived]" .. ulx.url1.tail
      elseif not ulx.url1.title and ulx.url1.date then                                    -- No title. Date.
        if ulx.url1.service == "wayback" then 
          period1 = "."
          period2 = "" 
        end
        sand = "[" .. ulx.url1.url .. " Archived] " .. ulx.url1.date .. comma(ulx.url1.date) .. ulx.url1.tail .. period1
      elseif ulx.url1.title and not ulx.url1.date then                                    -- Title. No date.
        sand = "[" .. ulx.url1.url .. " " .. ulx.url1.title .. "]" .. ulx.url1.tail
      elseif ulx.url1.title and ulx.url1.date then                                        -- Title. Date.
        sand = "[" .. ulx.url1.url .. " " .. ulx.url1.title .. "]" .. ulx.url1.tail .. "&#32;(" .. indexstr .. " " .. ulx.url1.date .. ")"
      else
        return nil
      end
      if ulx.url1.extraurls > 0 then                                                      -- For multiple archive URLs
        local tot = ulx.url1.extraurls + 1
        sand = sand .. period2 .. " Additional archives: "
        for i=2,tot do
          local indx = "url" .. i
          if ulx[indx]["title"] then 
            displayfield = "title"
          else
            displayfield = "date"
          end
          sand = sand .. "[" .. ulx[indx]["url"] .. " " .. ulx[indx][displayfield] .. "]"
          if i == tot then
            sand = sand .. "."
          else
            sand = sand .. ", "
          end
        end
      else
        return sand  
      end
      return sand
                                                                                          -- For {{cite archives}}
 
    else                                                                  
      if ulx.url1.format == "addlarchives" then                           -- Multiple archive services 
        displayheader = "Additional archives: "
      else                                                                -- Multiple pages from the same archive 
        displayheader = "Additional pages archived&nbsp;on " .. ulx.url1.date .. ": "
      end
      local tot = 1 + ulx.url1.extraurls
      local sand = displayheader
      for i=1,tot do
        local indx = "url" .. i
        displayfield = ulx[indx]["title"]
        if ulx.url1.format == "addlarchives" then
          if not displayfield then 
            displayfield = ulx[indx]["date"]
          end
        else
          if not displayfield then 
            displayfield = "Page " .. i
          end
        end
        sand = sand .. "[" .. ulx[indx]["url"] .. " " .. displayfield .. "]"
        if i == tot then
          sand = sand .. "."
        else
          sand = sand .. ", "
        end
      end
      return sand
    end
end
 
function p.webarchive(frame)
  args = frame.args
  if (args[1]==nil) and (args["url"]==nil) then           -- if no argument provided than check parent template/module args
    args = frame:getParent().args 
  end
 
  local tname = "Webarchive"                              -- name of calling template. Change if template rename.
  ulx = {}                                                -- Associative array to hold template data 
  track = {}                                              -- Associative array to hold tracking categories
  maxurls = 10                                            -- Max number of URLs allowed. 
  local verifydates = "yes"                               -- See documentation. Set "no" to disable.
 
                                                          -- URL argument (first)
 
  local url1 = trimArg(args.url) or trimArg(args.url1)           
  if not url1 then
    return inlineError("url", "Empty.") .. createTracking()
  end
  if mw.ustring.find( url1, "https://web.http", 1, plain ) then    -- track bug 
    track["Category:Webarchive template errors"] = 1 
    return inlineError("url", "https://web.http") .. createTracking()
  end 
  if url1 == "https://web.archive.org/http:/" then                 -- track bug
    track["Category:Webarchive template errors"] = 1 
    return inlineError("url", "Invalid URL") .. createTracking()
  end
 
  ulx.url1 = {}
  ulx.url1.url = url1
  local uri1 = mw.uri.new(ulx.url1.url)
  ulx.url1.host = uri1.host
  ulx.url1.extraurls = parseExtraArgs()
 
                                                          -- Nolink argument 
 
  local nolink = trimArg2(args.nolink)
 
  serviceName(uri1.host, nolink)
 
                                                          -- Date argument
 
  local date = trimArg(args.date) or trimArg(args.date1)
  if date == "*" and ulx.url1.service == "wayback" then
    date = "index"
  elseif date and ulx.url1.service == "wayback" and verifydates == "yes" then 
    local ldf = dateFormat(date)
    if ldf then
      local udate = decodeWaybackDate( uri1.path, ldf )
      if udate ~= date then
        date = udate .. inlineRed("<sup>[Date mismatch]</sup>", "warning")       
      end
    end
  elseif date and ulx.url1.service == "webcite" and verifydates == "yes" then 
    local ldf = dateFormat(date)
    if ldf then
      local udate = decodeWebciteDate( uri1.path, ldf )
      if udate == "query" then -- skip
      elseif udate ~= date then
        date = udate .. inlineRed("<sup>[Date mismatch]</sup>", "warning")      
      end
    end
  elseif not date and ulx.url1.service == "wayback" then
    date = decodeWaybackDate( uri1.path, "iso" )
    if not date then 
      date = inlineRed("[Date error] (1)", "error") 
    end
  elseif not date and ulx.url1.service == "webcite" then
    date = decodeWebciteDate( uri1.path, "iso" )
    if date == "query" then
      date = inlineRed("[Date missing]", "warning")
    elseif not date then 
      date = inlineRed("[Date error] (1)", "error")
    end
  elseif not date then
    date = inlineRed("[Date missing]", "warning")
  end
  ulx.url1.date = date
 
                                                          -- Format argument 
 
  local format = trimArg(args.format)
  if not format then
    format = "none"
  else
    if format == "addlpages" then
      if not ulx.url1.date then
        format = "none"
      end
    elseif format == "addlarchives" then
      format = "addlarchives"
    else
      format = "none"
    end
  end
  ulx.url1.format = format
 
                                                          -- Title argument 
 
  local title = trimArg(args.title) or trimArg(args.title1)
  ulx.url1.title = title
 
 
  local rend = createRendering()
  if not rend then
    rend = '<span style="font-size:100%" class="error citation-comment">Error in [[:Template:' .. tname .. ']]: Unknown problem. Please report on template talk page.</span>'
    track["Category:Webarchive template errors"] = 1 
  end
 
  return rend .. createTracking()
 
end
 
return p

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